JB/T 7118-1993 Technical requirements for small variable frequency and variable voltage speed regulating motors and power supplies
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Small Variable-frequency Variable-voltage Speed-regulating Motors and Power Supplies JB/T7118-93
Subject Content and Scope of Application
This standard specifies the types, parameters and dimensions, technical requirements, test methods, inspection rules, and marking and packaging requirements for small variable-frequency variable-voltage speed-regulating motors and power supplies.
This standard applies to variable-frequency speed-regulating systems with a nominal power of 0.5590kw. 2 Reference standards
GB1993
.GB4772.1
GB12665
GB10069
GB10068
GB1032
JB/Z294
JB/Z346
GB2681
Basic technical requirements for rotating electrical machines
Motor housing protection classification
Motor cooling method
Motor structure and installation type code
Motor dimensions and tolerances
Motors
Motors with frame sizes 36~400, frame sizes FF55-FF1080 or FT55FT1080 under general environmental conditions. Measurement method and limit of noise of rotating electric machine
Measurement method and limit of vibration of rotating electric machine
Test method of three-phase asynchronous motor
Packaging, storage and transportation graphic mark
Test method of inter-turn insulation of scattered winding of AC low-voltage motor Inter-turn insulation test limit of scattered winding of AC low-voltage motor Color of wire in complete set of electrical equipment
Electrical control equipment Part II: Electric control equipment equipped with electronic devices GB3797
GB4588.1~4588.2 Technical conditions for printed boards GB12668
3 Terminology
General technical conditions for semiconductor variable frequency speed control device of AC motor 3.1 Variable frequency speed control system
A variable frequency speed control system (referred to as system) composed of variable frequency variable voltage speed control motor and power supply. 3.2 Variable frequency speed control device
A power supply that controls the speed of AC motor by changing the output frequency and corresponding voltage is called variable frequency speed control device. The power supply in this standard refers to the variable frequency speed regulating device (referred to as the device).
3.3 Variable frequency variable voltage speed regulating motor
When powered by the variable frequency speed regulating device, it refers to the motor that can output the rated torque within the corresponding frequency range of the rated frequency and below (referred to as the motor).
3.4 Rated frequency
The motor operating frequency value corresponding to the turning point between the constant torque and constant power characteristics of this system. Approved by the Ministry of Machinery Industry on 199310-08
Implemented on 1994-01-01
3.5 Rated frequency resolution
The minimum step difference of the device during the frequency regulation process 3.6 Frequency stability accuracy
JB/T7118-93
The relative difference of the output frequency of the device under normal conditions from the specified value. 3.7 Output voltage
The effective value of the voltage between the output terminals of the device. 3.8 Rated output voltage
The output voltage value when the device outputs the rated frequency. 3.9 Voltage asymmetry
The ratio of the negative sequence component to the positive sequence component of the three-phase output voltage of the device. 3.10 Voltage-frequency ratio
The ratio of the output voltage to the output frequency of the device. 3.11 Rated output current
The output current determined by the manufacturer (the effective value of the current flowing through the output terminal of the device). This is used as the basis for: duty system and overload capacity. 3.12
Rated torque
The system can output a torque determined by the nominal power in the S1 duty system at rated frequency. Rated torque (N·m) Nominal power (kw) × 9549 3.13. Rated output capacity of the device
Synchronous speed (r/min)
The product of the rated output voltage and rated output current of the device. It can be obtained by formula (2): Formula (1) can be used to obtain:
Rated output capacity of the device (kA) = 3×output voltage (V)Xrated output current (A) 1000
4 Technical requirements
4.1 Main technical parameters
4.1.1 Nominal power
The nominal power of the system is selected from the following recommended values: 0.550.751.11.52.23.0
557590kw.
: (2)
4.1.2 Rated input voltage level and frequency
The output of the system The rated input working voltage levels of the input power supply are AC three-phase 380V or 220V and single-phase 220V (referred to as rated input voltage). The frequency is 50Hz or 60Hz. 4.2 Normal working environment conditions
4.2.1 AC input power supply
The voltage fluctuation of the AC input power supply of the device shall not exceed ±10%, and the frequency fluctuation shall not exceed ±2%. 4.2.2 Working environment temperature
Electric motor: The maximum ambient air temperature varies with the season, but does not exceed +40℃, and the minimum temperature is -15℃. Device: The maximum ambient air temperature is +40℃ (the average temperature within 24h does not exceed 35℃), the minimum is 0℃, and the ambient temperature change rate is not more than 5℃/h.
4.2.3 Relative humidity||t t||Motor: The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. Device: The maximum relative humidity of the air shall not exceed 90% (20℃). The rate of change of relative humidity shall not exceed 5% per hour, and condensation shall not occur.
4.2.4 Gas pollution
JB/T7118-93
The device operation site shall be free of conductive or explosive dust, and free of gas or steam that corrodes metal or destroys insulation. 4.2.5 Vibration
Allowable vibration conditions at the device installation site: When the vibration frequency severity level is 10-15Hz, the alarm acceleration shall not exceed 5m/s2. When the device is vibrated at the installation site and may resonate, measures shall be taken to avoid the response frequency. 4.2.6 Altitude
The altitude of the installation and use site shall not exceed 1000m. 4.3 Basic requirements
4.3.1 Overload capacity
At rated rate value: the system should be able to output 110% rated torque and run stably. The device should be able to withstand outputting 150% rated output current for 1 minute. 4.3.2 Frequency adjustment range
When the frequency adjustment range is 1:20, the system should be able to maintain stable operation. Among them, the rated torque can be output when the frequency adjustment range is not less than 1:10 at and below the rated frequency. The nominal power can be output when the frequency adjustment range is not less than 1:2 above the rated frequency. 4.3.3 Starting characteristics and acceleration and deceleration control
The system should have soft starting characteristics, and the acceleration and deceleration speeds can be adjusted separately. The upper limit of the acceleration and deceleration speeds should not be less than 60s. 4.3.4 Braking and forward and reverse operation
The system should have the functions of braking and forward and reverse control. 4.3.5 Protection function
The device in the system should be equipped with protection functions such as overcurrent, overvoltage, undervoltage, short circuit, overheating, loss of pressure, and stall. 4.3.6 Protective grounding to prevent electric shock
The motor and the device should be reliably grounded, and the grounding point should have an obvious grounding mark. The resistance between the metal parts that may be touched by the device and the grounding point of the shell should not be greater than 0.10. The metal structure should be reliably grounded. The conductive cross-section of the grounding point should meet the requirements of Table 1. Table 1
Cross-sectional area of main conductor feeding the device
<16 and below
4.3.7 Temperature rise
The cross-sectional area of the main grounding point
Equal to the cross-sectional area of the main conductor
Minimum 50% of the main conductor area, but not less than 16 The temperature rise of various parts inside the system: The device shall comply with the provisions of Article 4.3.15 of GB12668; The temperature rise of the stator winding of the motor, when B-class insulation, is 80K; when F-class insulation, the temperature rise is 105K; The bearing temperature of the motor shall not exceed 95℃. 4.4 Other technical requirements of the motor are shown in Appendix A, and other technical requirements of the device are shown in Appendix B. 5 Test methods
5.1 No-load test
The no-load test of the speed control system is carried out under normal working environment conditions. 5.2 Frequency modulation range and load test
The load test is carried out after the no-load test is qualified. 。 During the test, the system should run continuously under the conditions of rated input voltage, rated output power and rated output torque until the motor temperature rise stabilizes, and measure the upper and lower limits of the motor constant torque frequency modulation range fm and f when the system outputs rated torque; and measure the upper limit frequency f when the system outputs nominal power above the rated frequency. The above-mentioned frequency modulation range should comply with the provisions of Article 4.3.2 of this standard. 5.3 Overload test
JB/T7118-93
Under the condition of the motor hot state, the system meets the requirements of 4.3.1 under the conditions of rated input voltage and rated output frequency. 5.4 Temperature rise test
Perform in accordance with the provisions of Article 5.7 of GB12668. The temperature rise of each part shall not exceed the provisions of 4.3.7. 5.5 Starting characteristics and acceleration and deceleration control test
The system shall be able to continuously perform five starting, stopping and acceleration and deceleration control tests under the conditions of rated input voltage, rated output frequency and no-load. 5.6 Braking and forward and reverse operation test
The system shall be able to correctly continuously perform three braking and forward and reverse operation tests under the conditions of rated input voltage, rated output frequency and no-load. 5.7 Protection performance test
Perform in accordance with the method specified in Article 5.18 of GB12668. 6
Inspection rules
The inspection of the system is divided into factory inspection and type inspection. The inspection rules of motors and devices shall also be carried out in accordance with the provisions of Appendix A and Appendix B.
Factory inspection
Each system shall be inspected at the factory.
During the factory inspection, if any item fails, the system shall be judged as unqualified. 6.2 Type inspection
Type inspection shall be carried out on a set of system samples, or on multiple systems or components manufactured according to the same (or similar) design. Inspection can be carried out on different samples of the same type. If one item is found to be unqualified during the type inspection, it shall be returned for re-inspection. If it still fails in the re-inspection, it shall be judged that the type inspection of the system fails.
Any system with any of the following conditions shall be subject to type inspection: a.
Preliminary design identification of new products or old products transferred to the factory for production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance; during normal production, periodically or after accumulating a certain amount of output, no more than three years, a periodic inspection shall be carried out; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; when the national technical supervision agency proposes a requirement for type inspection. 6.3 Inspection items
The factory inspection and type inspection items of the system shall comply with the provisions of Table 2. Table 2
Air cutting test
Adjustment range
Overload test
Temperature rise test
Load test
Starting characteristics and acceleration and deceleration control test
Braking and forward and reverse running test
Protection performance inspection
Overload
Short-circuit protection
Overvoltage or undervoltage protection
Marking, packaging, transportation, storage
JB/T7118-93
Continued Table 2
Type inspection
The motor shall comply with the provisions of Appendix A5, and the device shall comply with the provisions of Appendix B6. Test
A1 Type, basic parameters and dimensions
JB/T7118-93
Appendix..A
Technical conditions for small variable-voltage variable-speed motors (supplements)
The protection level of the motor is IP44 or IP23 (see GB4942.1). A1.1
A1.2 The cooling method of the motor is IC01 or IC06 (see GB1993). The structure and installation type of the motor are IMB3, IMB35 (frame size 80-280) and IMB5 (frame size 80-225) (see A1.3
GB997).
A1.4 The rated voltage of the motor is 380V and the rated frequency is 50Hz. A1.5
The motor with a nominal power of 3kw or less is connected in Y connection, and other powers are connected in △ connection. The number of poles of the motor is 4.
The corresponding relationship between rated torque, nominal power and frequency modulation range shall comply with the provisions of Table A1. Table A1
Nominal power
Rated torque
Constant torque modulation range
Constant power modulation range
50~100
The motor frame number shall comply with the provisions of GB4722, and its corresponding relationship with the nominal power shall comply with the factory standard. The size and tolerance of the motor
The size and tolerance of the motor shaft extension key shall comply with the provisions of Table A2. Net
Shaft extension diameter
JB/T7118-93
The radial runout tolerance at half the shaft extension length shall comply with the provisions of Table A3. A3
>30-50
>50-75
The radial runout tolerance of the flange stop to the motor axis and the end runout tolerance of the flange mating surface to the motor axis shall comply with the provisions of Table A4.
Diameter of flange stop
130—230
>230-450
>450500
The parallelism tolerance of the motor axis to the foot support surface shall comply with the provisions of Table A5. Table A5
80-250
>250-280
Runout tolerance
Parallelism tolerance
JB/T7118-93
A1.9.5The flatness tolerance of the motor foot support surface shall comply with the provisions of Table A6. Table A6
Maximum dimension in AB or BB
Flatness tolerance
>100~160
>160~250
>250~400
Note: AB is the distance between the outer edges of the motor feet (end view). BB is the distance between the outer edges of the motor feet (side view)A1.9.6 The symmetry tolerance of the keyway on the motor shaft extension shall comply with the provisions of Table A7. Table A7
Key width (F)
Symmetry tolerance
A2 Technical requirements
The motor shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. A2.1
>400~630
A2.2 The motor adopts Class B and Class F insulation. When the altitude and ambient air temperature meet the requirements of Article 4.2, the temperature rise limit of the motor stator winding and the allowable temperature of the bearing (thermometer method) shall meet the requirements of Article 4.3.7. If the altitude or ambient air temperature of the test site is different from the requirements of Article 4.2, the temperature rise limit shall be revised according to the provisions of GB755. A2.3 Under the conditions of 380V, 50Hz grid voltage power supply and rated motor output torque, after the motor is subjected to temperature rise test and the torque is gradually increased, it shall be able to withstand an over-torque test of 1.6 times the rated torque for 15s without sudden speed change, stalling or harmful deformation. A2.4 When the motor is powered by 120Hz device and is running at no load, the motor shall be able to withstand a 2-minute operation without harmful deformation. A2.5 The stator winding resistance of the motor shall not be less than 0.38Mn in the hot state or after the temperature rise test. A2.6 The stator winding of the motor shall be able to withstand a withstand voltage test of 1 minute without breakdown. The frequency of the test voltage is 50Hz and it shall be a sine wave as far as possible. The effective value of the voltage is 1760V. When inspecting and testing a large number of motors produced continuously on a conveyor belt, the test time may be shortened to 1s, and the effective value of the test voltage is 2110V.
A2.7 The stator winding of the motor shall be able to withstand the turn-to-turn impulse withstand voltage test without breakdown. The peak value of the test impulse voltage shall comply with the provisions of JB/Z346.
A2.8 After the stator winding of the motor is tested for 6 cycles according to the 40℃ alternating damp heat test method specified in GB12665, the insulation resistance shall not be less than 0.38MQ, and it shall be able to withstand the withstand voltage test specified in Article A2.6 without breakdown. However, the effective value of the voltage is 1500V and the test time is 1min.
A2.9 The effective value of the vibration velocity measured when the motor is unloaded shall not exceed the provisions of Table A8. A8
Speed mm/s
80-132
>132-225
>225-280
The noise value of the A-weighted sound power level measured when the motor is no-load should not exceed the value specified in Table A9. The A2.10
tolerance of the noise value is +3dB(A).
Nominal power 'kw
Sound power level
Nominal power
Sound power level
JB/T7118-9.5
A2.11When the motor is powered by the grid voltage, when the three-phase power supply is balanced, the deviation of any phase of the three-phase no-load current of the motor from the three-phase average value should not be greater than 10% of the three-phase average value. A2.12 When the motor is powered by the grid voltage, its no-load and stall current and loss shall meet the inspection specifications. The unevenness of the motor air gap shall not be greater than that specified in Table A10. A2.13
In the table: 8-
Nominal value of air gap
Uneven value, which is defined as:
Table A10
2/3+8+8,8
Where: 1, 8, 6 are the air gap values measured at 120° apart. A2.14 The motor has a cylindrical shaft extension. When the two parties have another agreement, the motor is allowed to be made into two shaft extensions. The second shaft extension should be able to transmit the rated torque, but can only be driven by a coupling. A2.15 The motor should be made with six outlets. From the main shaft extension end, the motor's terminal box should be placed on the right side of the base. When the two parties have another agreement, the terminal box is allowed to be placed on the left side of the base. There should be a grounding screw in the motor's terminal box, and a grounding mark should be set near the grounding screw. This mark should ensure that it is not easy to erase during the entire service period of the motor. A2.16 When the alphabetical sequence of the outlet terminal mark is the same as the phase sequence direction of the power grid voltage, the motor should rotate clockwise when viewed from the main shaft extension end.
A3 Inspection rules
Each motor must pass the inspection before it can leave the factory, and it must be accompanied by a product certificate. A3.1
Each motor shall be inspected and tested. The inspection and test items include: A3.2
Mechanical inspection (according to the provisions of Articles A3.5 and A3.6 of the standard); b.
Measurement of the insulation resistance of the stator winding to the machine and between the phases of the winding (the cold insulation resistance can be measured during the inspection test, but the insulation resistance in the hot state shall not be lower than the provisions of Article A2.5 of this standard); measurement of the DC resistance of the stator winding in the actual cold state; c.
Withstand voltage test;
Turn-to-turn insulation test;bzxz.net
Measurement of no-load current and loss;
Note: The no-load characteristic curve shall be measured during the type test. g.
Measurement of the blocked rotor current and torque;
Note: The blocked rotor characteristic curve shall be measured during the type test. Noise measurement (according to the provisions of Article A3.6 of this standard); h.
Vibration measurement (according to the provisions of Article A3.6 of this standard); Type test must be carried out whenever any of the following situations occur. A3.3
When the manufacturer conducts the first trial production or small-batch trial production after identification and finalization: when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when there is an unacceptable deviation between the inspection test results and the previous type test results; batch-produced motors are regularly sampled and tested once every three years. A3.4
The type test items of the motor include:
·All items of the inspection test;
Temperature rise test;
Determination of load characteristics;
Short-time overtorque test;
Overspeed test.
A3.5 The mechanical inspection items of the motor include: JB/T7118-93
Rotation inspection: When the motor rotates, it should be smooth and light without stagnation; a.
Appearance inspection: Check whether the motor is assembled completely and correctly, and the paint on the motor surface should be dry, complete, uniform, without stains, magnetic damage, b.
cracks, etc.;
Installation size and key size inspection: The installation size should comply with the provisions of GB4772, and the key size should comply with the provisions of c
A1.9.1 of this standard.
d. Inspection of circular runout, parallelism and flatness of the foot support surface and symmetry of the keyway: The circular runout should comply with the provisions of Articles A1.9.2 and A1.9.3, and the parallelism and flatness of the foot support surface should comply with the provisions of Articles A1.9.4 and A1.9.5 respectively. The keyway symmetry shall comply with the provisions of Article A1.9.6. The flatness of the foot support surface and the keyway symmetry are allowed to be checked on the parts. A3.6 Article a and b of Article A3.5 of this standard must be checked for each unit. Article h and i of Article A3.2 and Article c and d of Article A3.5 may be checked randomly. The method of random inspection shall be specified by the manufacturer.
A4 Test method
A4.1 The test methods specified in Article A3.2 (except e, h and i) and Article A3.4 of this standard (except b and c) shall be carried out in accordance with GB1032. Article e of Article A3.2 shall be carried out in accordance with JB/Z294. The inspection of dimensions and tolerances specified in Article A3.5 shall be carried out in accordance with GB4772.1.
A4.2 The test of motor housing protection level, 40℃ alternating damp heat test and air unevenness inspection can be carried out when the product structure is finalized or when there are major changes in structure and process. The test method of housing protection level shall be carried out in accordance with GB4942.1, and the 40℃ alternating damp heat test shall be carried out in accordance with GB12665.
A4.3 Article A3.2 h of this standard for the determination of motor noise. A4.3.1 Start the fan first, and under the power supply of the device, measure the maximum noise of the motor when it is no-load at two frequencies of 50Hz and 100Hz, which is the motor noise value. The test method is carried out in accordance with GB10069. A4.4 Article A3.2 i of this standard for the determination of motor vibration. The fan is powered off, and under the power supply of the device, the maximum vibration speed value of the motor when it is no-load is measured at two frequencies of 50Hz and 100Hz, which is the vibration value of the motor. The test method is carried out in accordance with GB10068. A4.5 Temperature rise test method of Article A3.4b of this standard A4.5.1 Temperature rise test of motor at 50Hz: First start the cooling fan, adjust the device frequency to 50Hz, run the motor at rated torque, and use a thermometer to regularly measure the temperature of the motor base. After the temperature rise stabilizes, stop the motor immediately (but the fan should continue to run), measure the stator winding resistance, and measure the bearing temperature at the same time. The temperature rise calculation test method shall be carried out in accordance with GB1032. A4.5.25Hz temperature rise test of motor
Restart the motor immediately after the test of Article A4.5.1, and adjust the device frequency to 5Hz. The motor runs at rated torque, and use a thermometer to regularly measure the temperature of the motor base. After the temperature rise stabilizes, stop the motor immediately (but the fan should continue to run) and measure the stator winding resistance. The temperature rise calculation method shall be carried out in accordance with GB1032. A4.6 Determination of load characteristics of Article A3.4 C of this standard After the test of Article A4.5.2, restart the motor immediately and adjust the device to 5, 15, 30, and 50 Hz respectively to measure the torque of the motor at the rated torque, 110% of the rated torque, and 80% of the rated torque. Then measure the power torque of the motor at the nominal power, 110% of the nominal power, and 80% of the nominal power at the frequencies of 75 and 100 Hz respectively. Then draw the load characteristic curve of the motor as shown in Figure A13 (N·m)
A5 Marking, packaging and warranty period
Torque value (the nominal power at this time should be converted into
Frequency (Hz)
The nameplate material and the method of engraving the data on the nameplate should ensure that the handwriting is visible throughout the use of the motor. The nameplate should be fixed on the upper part of the motor base and should indicate the following items: manufacturer name;
motor name (variable frequency speed regulation three-phase asynchronous motor); motor model;
housing protection level (allowed to make a separate nameplate); nominal power;
nominal current;
rated voltage;
rated frequency;
constant torque range (5~50Hz), constant power range (50~100H:); insulation level;
wiring method;
manufacturer's year and month of production and product number;
weight;
standard number.
The six outlet terminals of the motor stator winding and the wiring position of the wire board should have corresponding marks, and the handwriting should be ensured to be difficult to erase during the entire service period of the motor. The markings are in accordance with the provisions of Table A11.5); Determination of DC resistance of stator winding in actual cold state; c.
Withstand voltage test;
Turn-to-turn insulation test;
Determination of no-load current and loss;
Note: No-load characteristic curve should be measured during type test. g.
Determination of stalled rotor current and torque;
Note: Stalled rotor characteristic curve should be measured during type test. Determination of noise (according to the provisions of Article A3.6 of this standard); h.
Determination of vibration (according to the provisions of Article A3.6 of this standard); Type test must be carried out in any of the following situations. A3.3
When the manufacturer conducts the first trial production or small batch trial production after identification and finalization: When the changes in motor design or process are sufficient to cause changes in certain characteristics and parameters; When the inspection test results and the previous type test results have unacceptable deviations; Regular sampling of motors produced in batches, once every three years. A3.4 Type test items of the motor include: All items of inspection test; Temperature rise test; Determination of load characteristics; Short-time over-torque test; Overspeed test. A3.5 Mechanical inspection items of the motor include: JB/T7118-93 Rotation inspection: When the motor rotates, it should be smooth and brisk without stagnation; a. Appearance inspection: Check whether the motor is assembled correctly and completely, and the paint on the surface of the motor should be dry, complete, uniform, without stains, magnetic damage, cracks, etc.; Installation size and key size inspection: The installation size should comply with the provisions of GB4772, and the key size should comply with the provisions of Section c. A1.9.1 of this standard.
d. Inspection of circular runout, parallelism and flatness of the foot support surface and keyway symmetry: Circular runout shall comply with the provisions of Articles A1.9.2 and A1.9.3, and the parallelism and flatness of the foot support surface shall comply with the provisions of Articles A1.9.4 and A1.9.5 respectively. The keyway symmetry shall comply with the provisions of Article A1.9.6, and the flatness of the foot support surface and the keyway symmetry may be inspected on the parts. A3.6 Article a and b of Article A3.5 of this standard must be inspected for each unit, while Articles h and i of Article A3.2 and Articles c and d of Article A3.5 may be inspected on a spot basis, and the inspection method shall be specified by the manufacturer.
A4 Test methods
A4.1 The test methods for the tests specified in Article A3.2 (except e, h and i) and Article A3.4 of this standard (except b and c) shall be carried out in accordance with GB1032, Article A3.2 e shall be carried out in accordance with JB/Z294, and the inspection of dimensions and tolerances specified in Article A3.5 shall be carried out in accordance with GB4772.1.
A4.2 The test of the protection level of the motor housing, the 40℃ alternating damp heat test and the inspection of air unevenness may be carried out when the product structure is finalized or when there are major changes in the structure and process. The test method for the protection level of the housing shall be carried out in accordance with GB4942.1, and the 40℃ alternating damp heat test shall be carried out in accordance with GB12665.
A4.3 The determination of motor noise in Article A3.2 h of this standard. A4.3.1 Start the fan first, and measure the maximum noise of the motor when it is unloaded at two frequencies of 50Hz and 100Hz under the power supply of the device, which is the noise value of the motor. The test method is carried out in accordance with GB10069. A4.4 Determination of motor vibration in Article A3.2 i of this standard. The fan is powered off, and the maximum vibration speed value of the motor when it is unloaded is measured at two frequencies of 50Hz and 100Hz under the power supply of the device, which is the vibration value of the motor. The test method is carried out in accordance with GB10068. A4.5 Temperature rise test method in Article A3.4 b of this standard A4.5.1 Temperature rise test of the motor at 50Hz Start the cooling fan first, adjust the rated frequency of the device to 50Hz, run the motor at rated torque, and use a thermometer to regularly measure the temperature of the motor base. After the temperature rise stabilizes, stop the motor immediately (but the fan should continue to run), measure the stator winding resistance, and measure the bearing temperature at the same time. The temperature rise calculation test method is carried out in accordance with GB1032. A4.5.25Hz motor temperature rise test
Restart the motor immediately after the test in A4.5.1 and adjust the device frequency to 5Hz. The motor runs at rated torque and the motor base temperature is measured regularly with a thermometer. After the temperature rise stabilizes, stop the motor immediately (but the fan should continue to run) and measure the stator winding resistance. The temperature rise calculation method shall be carried out in accordance with GB1032. A4.6 Determination of load characteristics of Article A3.4 C of this standard After the test of Article A4.5.2, restart the motor immediately and adjust the device to 5, 15, 30, and 50 Hz respectively to measure the torque of the motor at the rated torque, 110% of the rated torque, and 80% of the rated torque. Then measure the power torque of the motor at the nominal power, 110% of the nominal power, and 80% of the nominal power at the frequencies of 75 and 100 Hz respectively. Then draw the load characteristic curve of the motor as shown in Figure A13 (N·m)
A5 Marking, packaging and warranty period
Torque value (the nominal power at this time should be converted into
Frequency (Hz)
The nameplate material and the method of engraving the data on the nameplate should ensure that the handwriting is visible throughout the use of the motor. The nameplate should be fixed on the upper part of the motor base and should indicate the following items: manufacturer name;
motor name (variable frequency speed regulation three-phase asynchronous motor); motor model;
housing protection level (allowed to make a separate nameplate); nominal power;
nominal current;
rated voltage;
rated frequency;
constant torque range (5~50Hz), constant power range (50~100H:); insulation level;
wiring method;
year and month of manufacture and product number;
weight;
standard number.
The six outlet terminals of the motor stator winding and the wiring position of the wire board should have corresponding marks, and the handwriting should be ensured to be difficult to erase during the entire service period of the motor. The markings are in accordance with the provisions of Table A11.5); Determination of DC resistance of stator winding in actual cold state; c.
Withstand voltage test;
Turn-to-turn insulation test;
Determination of no-load current and loss;
Note: No-load characteristic curve should be measured during type test. g.
Determination of stalled rotor current and torque;
Note: Stalled rotor characteristic curve should be measured during type test. Determination of noise (according to the provisions of Article A3.6 of this standard); h.
Determination of vibration (according to the provisions of Article A3.6 of this standard); Type test must be carried out in any of the following situations. A3.3
When the manufacturer conducts the first trial production or small batch trial production after identification and finalization: When the changes in motor design or process are sufficient to cause changes in certain characteristics and parameters; When the inspection test results and the previous type test results have unacceptable deviations; Regular sampling of motors produced in batches, once every three years. A3.4 Type test items of the motor include: All items of inspection test; Temperature rise test; Determination of load characteristics; Short-time over-torque test; Overspeed test. A3.5 Mechanical inspection items of the motor include: JB/T7118-93 Rotation inspection: When the motor rotates, it should be smooth and brisk without stagnation; a. Appearance inspection: Check whether the motor is assembled correctly and completely, and the paint on the surface of the motor should be dry, complete, uniform, without stains, magnetic damage, b. Cracks, etc.; Installation size and key size inspection: The installation size should comply with the provisions of GB4772, and the key size should comply with the provisions of Section c of this standard A1.9.1.
d. Inspection of circular runout, parallelism and flatness of the foot support surface and keyway symmetry: Circular runout shall comply with the provisions of Articles A1.9.2 and A1.9.3, and the parallelism and flatness of the foot support surface shall comply with the provisions of Articles A1.9.4 and A1.9.5 respectively. The keyway symmetry shall comply with the provisions of Article A1.9.6, and the flatness of the foot support surface and the keyway symmetry may be inspected on the parts. A3.6 Article a and b of Article A3.5 of this standard must be inspected for each unit, while Articles h and i of Article A3.2 and Articles c and d of Article A3.5 may be inspected on a spot basis, and the inspection method shall be specified by the manufacturer.
A4 Test methods
A4.1 The test methods for the tests specified in Article A3.2 (except e, h and i) and Article A3.4 of this standard (except b and c) shall be carried out in accordance with GB1032, Article A3.2 e shall be carried out in accordance with JB/Z294, and the inspection of dimensions and tolerances specified in Article A3.5 shall be carried out in accordance with GB4772.1.
A4.2 The test of the protection level of the motor housing, the 40℃ alternating damp heat test and the inspection of air unevenness may be carried out when the product structure is finalized or when there are major changes in the structure and process. The test method for the protection level of the housing shall be carried out in accordance with GB4942.1, and the 40℃ alternating damp heat test shall be carried out in accordance with GB12665.
A4.3 The determination of motor noise in Article A3.2 h of this standard. A4.3.1 Start the fan first, and measure the maximum noise of the motor when it is unloaded at two frequencies of 50Hz and 100Hz under the power supply of the device, which is the noise value of the motor. The test method is carried out in accordance with GB10069. A4.4 Determination of motor vibration in Article A3.2 i of this standard. The fan is powered off, and the maximum vibration speed value of the motor when it is unloaded is measured at two frequencies of 50Hz and 100Hz under the power supply of the device, which is the vibration value of the motor. The test method is carried out in accordance with GB10068. A4.5 Temperature rise test method in Article A3.4 b of this standard A4.5.1 Temperature rise test of the motor at 50Hz Start the cooling fan first, adjust the rated frequency of the device to 50Hz, run the motor at rated torque, and use a thermometer to regularly measure the temperature of the motor base. After the temperature rise stabilizes, stop the motor immediately (but the fan should continue to run), measure the stator winding resistance, and measure the bearing temperature at the same time. The temperature rise calculation test method is carried out in accordance with GB1032. A4.5.25Hz motor temperature rise test
Restart the motor immediately after the test in A4.5.1 and adjust the device frequency to 5Hz. The motor runs at rated torque and the motor base temperature is measured regularly with a thermometer. After the temperature rise stabilizes, stop the motor immediately (but the fan should continue to run) and measure the stator winding resistance. The temperature rise calculation method shall be carried out in accordance with GB1032. A4.6 Determination of load characteristics of Article A3.4 C of this standard After the test of Article A4.5.2, restart the motor immediately and adjust the device to 5, 15, 30, and 50 Hz respectively to measure the torque of the motor at the rated torque, 110% of the rated torque, and 80% of the rated torque. Then measure the power torque of the motor at the nominal power, 110% of the nominal power, and 80% of the nominal power at the frequencies of 75 and 100 Hz respectively. Then draw the load characteristic curve of the motor as shown in Figure A13 (N·m)
A5 Marking, packaging and warranty period
Torque value (the nominal power at this time should be converted into
Frequency (Hz)
The nameplate material and the method of engraving the data on the nameplate should ensure that the handwriting is visible throughout the use of the motor. The nameplate should be fixed on the upper part of the motor base and should indicate the following items: manufacturer name;
motor name (variable frequency speed regulation three-phase asynchronous motor); motor model;
housing protection level (allowed to make a separate nameplate); nominal power;
nominal current;
rated voltage;
rated frequency;
constant torque range (5~50Hz), constant power range (50~100H:); insulation level;
wiring method;
manufacturer's year and month of production and product number;
weight;
standard number.
The six outlet terminals of the motor stator winding and the wiring position of the wire board should have corresponding marks, and the handwriting should be ensured to be difficult to erase during the entire service period of the motor. The markings are in accordance with the provisions of Table A11.The test methods for the various tests specified in Article 4 (except for b and c) shall be carried out in accordance with GB1032, Article A3.2 e shall be carried out in accordance with JB/Z294, and the inspection of dimensions and tolerances specified in Article A3.5 shall be carried out in accordance with GB4772.1.
A4.2 The test of the protection level of the motor housing, the 40°C alternating damp heat test and the inspection of air unevenness may be carried out when the product structure is finalized or when there are major changes in the structure and process. The test method for the protection level of the housing shall be carried out in accordance with GB4942.1, and the 40°C alternating damp heat test shall be carried out in accordance with GB12665.
A4.3 The determination of the motor noise in Article A3.2 h of this standard. A4.3.1 Start the fan first, and measure the maximum noise of the motor when it is unloaded at two frequencies of 50Hz and 100Hz under the power supply of the device, which is the noise value of the motor. The test method shall be carried out in accordance with GB10069. A4.4 Determination of motor vibration in Article A3.2 i of this standard. The fan is powered off, and under the power supply of the device, the maximum vibration speed value of the motor when it is no-load is measured at two frequencies of 50Hz and 100Hz respectively, which is the vibration value of the motor. The test method is carried out in accordance with GB10068. A4.5 Temperature rise test method in Article A3.4 b of this standard A4.5.1 The temperature rise test of the motor at 50Hz is to start the cooling fan first, adjust the device frequency to 50Hz, run the motor at rated torque, and use a thermometer to regularly measure the temperature of the motor base. After the temperature rise stabilizes, stop the machine immediately (but the fan should continue to run), measure the stator winding resistance, and measure the bearing temperature at the same time. The temperature rise calculation test method is carried out in accordance with GB1032. A4.5.25Hz motor temperature rise test
Restart the motor immediately after the test in A4.5.1 and adjust the device frequency to 5Hz. The motor runs at rated torque and the motor base temperature is measured regularly with a thermometer. After the temperature rise stabilizes, stop the motor immediately (but the fan should continue to run) and measure the stator winding resistance. The temperature rise calculation method shall be carried out in accordance with GB1032. A4.6 Determination of load characteristics of Article A3.4 C of this standard After the test of Article A4.5.2, restart the motor immediately and adjust the device to 5, 15, 30, and 50 Hz respectively to measure the torque of the motor at the rated torque, 110% of the rated torque, and 80% of the rated torque. Then measure the power torque of the motor at the nominal power, 110% of the nominal power, and 80% of the nominal power at the frequencies of 75 and 100 Hz respectively. Then draw the load characteristic curve of the motor as shown in Figure A13 (N·m)
A5 Marking, packaging and warranty period
Torque value (the nominal power at this time should be converted into
Frequency (Hz)
The nameplate material and the method of engraving the data on the nameplate should ensure that the handwriting is visible throughout the use of the motor. The nameplate should be fixed on the upper part of the motor base and should indicate the following items: manufacturer name;
motor name (variable frequency speed regulation three-phase asynchronous motor); motor model;
housing protection level (allowed to make a separate nameplate); nominal power;
nominal current;
rated voltage;
rated frequency;
constant torque range (5~50Hz), constant power range (50~100H:); insulation level;
wiring method;
year and month of manufacture and product number;
weight;
standard number.
The six outlet terminals of the motor stator winding and the wiring position of the wire board should have corresponding marks, and the handwriting should be ensured to be difficult to erase during the entire service period of the motor. The markings are in accordance with the provisions of Table A11.The test methods for the various tests specified in Article 4 (except for b and c) shall be carried out in accordance with GB1032, Article A3.2 e shall be carried out in accordance with JB/Z294, and the inspection of dimensions and tolerances specified in Article A3.5 shall be carried out in accordance with GB4772.1.
A4.2 The test of the protection level of the motor housing, the 40°C alternating damp heat test and the inspection of air unevenness may be carried out when the product structure is finalized or when there are major changes in the structure and process. The test method for the protection level of the housing shall be carried out in accordance with GB4942.1, and the 40°C alternating damp heat test shall be carried out in accordance with GB12665.
A4.3 The determination of motor noise in Article A3.2 h of this standard. A4.3.1 Start the fan first, and measure the maximum noise of the motor when it is unloaded at two frequencies of 50Hz and 100Hz under the power supply of the device, which is the noise value of the motor. The test method shall be carried out in accordance with GB10069. A4.4 Determination of motor vibration in Article A3.2 i of this standard. The fan is powered off, and under the power supply of the device, the maximum vibration speed value of the motor when it is no-load is measured at two frequencies of 50Hz and 100Hz respectively, which is the vibration value of the motor. The test method is carried out in accordance with GB10068. A4.5 Temperature rise test method in Article A3.4 b of this standard A4.5.1 The temperature rise test of the motor at 50Hz is to start the cooling fan first, adjust the device frequency to 50Hz, run the motor at rated torque, and use a thermometer to regularly measure the temperature of the motor base. After the temperature rise stabilizes, stop the machine immediately (but the fan should continue to run), measure the stator winding resistance, and measure the bearing temperature at the same time. The temperature rise calculation test method is carried out in accordance with GB1032. A4.5.25Hz motor temperature rise test
Restart the motor immediately after the test in A4.5.1 and adjust the device frequency to 5Hz. The motor runs at rated torque and the motor base temperature is measured regularly with a thermometer. After the temperature rise stabilizes, stop the motor immediately (but the fan should continue to run) and measure the stator winding resistance. The temperature rise calculation method shall be carried out in accordance with GB1032. A4.6 Determination of load characteristics of Article A3.4 C of this standard After the test of Article A4.5.2, restart the motor immediately and adjust the device to 5, 15, 30, and 50 Hz respectively to measure the torque of the motor at the rated torque, 110% of the rated torque, and 80% of the rated torque. Then measure the power torque of the motor at the nominal power, 110% of the nominal power, and 80% of the nominal power at the frequencies of 75 and 100 Hz respectively. Then draw the load characteristic curve of the motor as shown in Figure A13 (N·m)
A5 Marking, packaging and warranty period
Torque value (the nominal power at this time should be converted into
Frequency (Hz)
The nameplate material and the method of engraving the data on the nameplate should ensure that the handwriting is visible throughout the use of the motor. The nameplate should be fixed on the upper part of the motor base and should indicate the following items: manufacturer name;
motor name (variable frequency speed regulation three-phase asynchronous motor); motor model;
housing protection level (allowed to make a separate nameplate); nominal power;
nominal current;
rated voltage;
rated frequency;
constant torque range (5~50Hz), constant power range (50~100H:); insulation level;
wiring method;
manufacturer's year and month of production and product number;
weight;
standard number.
The six outlet terminals of the motor stator winding and the wiring position of the wire board should have corresponding marks, and the handwriting should be ensured to be difficult to erase during the entire service period of the motor. The markings are in accordance with the provisions of Table A11.
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