JB/T 10271-2001 General technical requirements for DC spindle motors for CNC machine tools
Some standard content:
JB/T10271--2001
The DC spindle motors used in CNC machine tools mostly adopt the structure of DC motors, but they are different from ordinary DC motors, so the standards of DC motors cannot be applied, and there are no corresponding international standards or foreign advanced national standards. The purpose of this standard is to make domestic products approach the international level and guide the production of the industry. This standard is based on the requirements of JB/T8832--1999 "General Technical Conditions for Machine Tool Digital Control Systems", the International Electrotechnical Commission 1EC60034-1 "Rating and Performance of Rotating Motors" (1996 Edition) and IEC72-1 "Dimensions and Power Levels of Rotating Motors" (1991 Edition), and is compiled with reference to product samples of internationally renowned companies and combined with the production conditions of Chinese enterprises, and is as consistent as possible with the relevant provisions of the above international standards.
This standard is proposed and managed by the National Industrial Automation System and Integration Standardization Technical Committee. The drafting unit of this standard: Beijing Machine Tool Research Institute. The main drafter of this standard: Li Chengzhao.
This standard was first issued in June 2001.
This standard is entrusted to Beijing Machine Tool Research Institute for interpretation. 570
1 Scope
Machinery Industry Standard of the People's Republic of China
DC Spindle Motors for CNC Machine Tools
General Technical Conditions
General specification for D. C, spindle motorsJB/T 10271—2001
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of DC spindle motors for CNC machine tools.
This standard applies to DC spindle motors for CNC machine tools and similar purposes (hereinafter referred to as motors). 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB755--2000 Ratings and performance of rotating electrical machines (idtIEC60034-1:1996) GB/T1311--1989 Test methods for DC motors (neqIEEE113:1973) GB/T 2423. 3--1993
Basic environmental testing procedures for electric and electronic products (eqv IEC 60068-2-3:1984)
Test Ca: Steady state damp heat test method
GB/T2423.16--1999
Environmental testing for electric and electronic products Part 2: Test methods (idt IEC 60068- 2-10:1988)
GB/T 2423. 17 -1993
GB/T 2828---1987
Test" and guidelines: Changshao
Basic environmental test procedures for electrical and electronic products Test Ka: Salt spray test method (egv IEC 60068-2-11:1981)
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) G1342081993 Enclosure protection degree (IP code) (eqvIEC529:1989) GB/T4772.1~4772.21999 Rotating motor dimensions and output power levels (idtIEC72:1990) GB/T4831---1984 Motor product model compilation method GB10068.-2000
Mechanical vibration of motors with a shaft center height of 56mm or more - Measurement, evaluation and limit of vibration (idt IEC 60034-14:1996)
GI3/T 10069. 1 --1988
Determination method and limit of noise of rotating electrical machines
(neq ISO 61680-1:1986)
GB/T 13384.-1992
3 Definitions
This standard adopts the following definitions.
3.1 Continuous rated output power
Electromechanical product packaging
General technical conditions
Noise engineering determination method
Under the condition that the temperature rise of the motor does not exceed the allowable temperature rise, the area where the motor can work for a long time is called the continuous working area. In the continuous working area, the maximum power that the motor can output is called the continuous rated output power. It is referred to as the rated power. Rated output power in short-time working system (S2) 3.2
Approved by China Machinery Industry Federation on June 4, 2001, implemented on October 1, 2001
JB/T102712001
The maximum power that the motor can output in the S230min working area. 3.3
Rated output power in continuous cycle working system (S6) The maximum power that the motor can output in the S650% working area (cycle time: 10min; connected for 5min, disconnected for 5min). Rated torque
The maximum torque that the motor can output in the continuous working area. 3.5 Rated speed (basic speed)
The speed at which the motor reaches maximum power in the continuous working area at rated torque. 3.6 Maximum speed
The maximum speed allowed by the motor in the continuous working area. 3.7
Rated current
The armature current of the motor in the continuous working range corresponding to the rated torque. 3.8
Maximum voltage
The voltage between the motor terminals at the rated speed and the maximum power at the point of short-time working (S2). 4
Model and structure
4.1 Model naming
The model naming of the motor is in accordance with the provisions of (B/T4831, and is composed of product code, specification code and supplementary code. 4.1.1 Product code
The product code is represented by capital Chinese phonetic letters: ZZT--- indicates a separately excited DC motor for machine tool spindle; ZZY... indicates a permanent magnet DC motor for machine tool spindle. 4.1.2 Specification code
The specification code is represented by the base number (center height) (foot-mounted motor) or flange number (flange-mounted motor) and the base length: installation dimensions and the dimensions of shaft extension, key and keyway. According to the provisions of Table 1 to Table 4 in GB/T1772.1-1999. 4.1.3 Supplementary code
Supplementary code is only used for motors with such requirements (such as specifying rated speed or feedback part) Supplementary codes are represented by Chinese phonetic letters or Arabic numerals. The meaning of supplementary codes should be explained in the product manual. 4.1.4 Model examples
Foot-mounted, frame number 112SS indicates a short iron core 1500r/min separately excited DC spindle motor: 77T
refers to the short distance between the axis of the foot bolt through hole), rated speed 1500
Supplementary code
Specification code
-Product code
Flange-mounted, flange number FF115 (FF indicates that there is a through hole on the flange), rated speed 1500r/min separately excited DC shaft motor:
4.2 Basic appearance structure and installation type
JB/T10271---2001
The installation type of the motor is foot-mounted or flange-mounted. The basic shaft extension type of the motor is a keyway shaft extension. The feedback element can be installed in the rear cover of the motor. 5
Technical requirements
5.1 Environmental adaptability
5.1.1 Climate adaptability
Supplementary code
Specification code
Product code
The working climate conditions and storage and transportation climate conditions of the motor are shown in Table 1. Table 1
Ambient temperature
Relative humidity
Atmospheric pressure
5.1.2 Altitude
Working climate conditions
0~40℃
30%～95% (no condensation)
86~106kPa
Storage and transportation climate conditions
40~~ + 55
95%(40%
86-106 kPa
When the altitude does not exceed 1000m, the motor should be able to guarantee various technical indicators. When the altitude exceeds 1000m, the weakening of air cooling effect needs to be considered. At this time, the design and use should be carried out according to the agreement between the manufacturer and the user. 5.2 Appearance and assembly quality
5.2.1 Appearance
The surface of the motor should not be rusted, the coating layer should not fall off, and there should be no bumps and scratches. The fasteners should be firmly connected. The handwriting and content of the wiring device mark and nameplate should be clear and correct and should not fall off. 5.2.2 Appearance and installation dimensions
The appearance and installation dimensions of the motor are shown in Figure 1.573
The meanings of each dimensional symbol are as follows:
JB/T 10271—2001
Figure 1 Schematic diagram of motor appearance dimensions
-Distance between the axes of the through holes of the foot bolts (end view); width of the foot (end view);
Distance from the outer edge of the foot (end view), motor diameter or the maximum distance between the two side faces; distance from the vertical center line of the motor to the edge of the most protruding part of the terminal box or other fixed on the side of the motor: distance between the axes of the through holes of the foot bolts;Www.bzxZ.net
foot length;
Distance between the outer edges of the foot (side view); distance from the shaft extension shoulder to the axis of the nearest through hole of the foot bolt: D-shaft extension diameter;
E---shaft extension length from the shaft shoulder;
--width of the keyway at the end of the shaft extension;
JB/T 10271—2001
The distance from the bottom of the keyway to the outer surface of the opposite side at the shaft extension end; GA-——The distance from the top of the key to the outer surface of the opposite side at the shaft extension end; GrThe height of the key at the shaft extension end;
G…The depth from the outer surface of the shaft extension end to the bottom of the keyway; H
-The distance from the motor axis to the bottom of the foot (basic dimension); -The thickness of the foot;
“The distance from the top of the horizontal motor to the bottom of the foot; -The distance from the lifting ring, terminal box or The distance from the top surface of other most protruding parts to the bottom surface of the foot: Hu
K—diameter of the through hole of the foot or the width of the oblong hole; L-—total length of the motor;
flange thickness;
distance from the flange mounting surface to the end face of the motor; M.---base circle diameter of the concave flange mounting hole;
flange stop diameter;
P-flange outer diameter, if not circular, is twice the maximum radius size; R. Distance from the flange mounting surface to the shaft extension shoulder; S-…flange screw Bolt through hole diameter;
T Flange stop height.
5.2.3 Shaft extension radial runout
The radial runout of the outer circle matching surface of the motor shaft extension shall not exceed the provisions of Table 2. The specific value shall be specified in the special technical conditions.
Shaft extension diameter
≥10～18
>18～30
>30～50
≥50~80
>80-~120||tt ||Radial runout of shaft extension
5.2.4 Radial runout of flange stop to motor axis and end face runout of flange mounting face to motor axis The radial runout of flange stop to motor axis and end face runout of flange mounting face to motor axis shall not exceed the provisions of Table 3. The specific values shall be specified in the special technical conditions. Flange number
Maximum runout
Flange number
5.3 Wire outlet mode and marking
JB/T 10271—2001
Table 3 (end)
Maximum runout
The wire outlet mode of the power supply terminal and feedback element of the motor is through the terminal box or plug socket. The terminal shall be clearly marked and shall comply with the provisions of the special technical conditions. 5.4 Electrical performance requirements
This standard only specifies the electrical performance requirements of the DC spindle motor itself. The feedback components installed in the motor should meet the requirements of the corresponding standards.
5.4.1 Insulation resistance
Under normal test climate conditions and extreme low temperature conditions specified in special technical conditions, the insulation resistance of the motor armature winding to the housing should not be less than 20M2, and under specified high temperature conditions, the insulation resistance should not be less than 5M2. The insulation resistance after the condensation heat test should not be less than 1MQ. The voltage value of the megohmmeter used for insulation resistance inspection should meet the requirements of Table 4. Table 4
Test voltage during withstand voltage test
500～1000
≥1500
5.4.2 Withstand voltage
Megohmmeter voltage
The motor winding and the housing should be able to withstand the test voltage specified in Table 5 for 1 minute. There should be no insulation breakdown or arcing, and the effective value of the winding leakage current should comply with the provisions of Table 6. After the test, the insulation resistance should be measured immediately and should comply with the provisions of 5.4.1. The frequency of the test voltage is 50Hz and should be a sine wave as much as possible. During factory inspection, the 1-minute withstand voltage test can be replaced by the 5-minute test. The test voltage remains unchanged. When the withstand voltage test is repeated, the test voltage is 80% of the specified value. 5
Rated power ≤1kw
Rated power>1kw
Frame number or flange number
Effective value of leakage current mA
5.4.3 No-load current
The no-load current of the motor shall be specified in the special technical conditions. 576
Test voltage (effective value)
500V plus 2 times the maximum voltage
1000V plus 2 times the maximum voltage, but the minimum is 150V160
5.4.4 Direction of rotation
JB/T 10271-—2001
The motor can rotate in both positive and negative directions. Connect the wires according to the wiring mark. When viewed from the motor shaft extension end, the rotation direction of the motor shaft is counterclockwise. And it is specified as the positive direction.
5.4.5 Rated speed
The steady-state speed of the motor under rated load in the forward and reverse directions shall be specified in the special technical conditions. 5.4.6 Rated torque
The rated torque of the motor shall be specified in the special technical conditions. 5.4.7 Rated power
The rated power of the motor shall be specified in the special technical conditions. The following data shall be selected first: 0.75, 1.1, 1.5, 2.2. 3.7, 5.5, 7.5. 11, 15, 18.5, 22, 30, 37, 45, 55, 75, 90, 110, 132, 150 kW. 5.4.8 Maximum voltage
The maximum voltage of the motor shall be specified in the special technical conditions. 5.4.9 Maximum speed
The maximum speed of the motor shall be specified in the special technical conditions. 5.4.10 Rated output power in short-time working system (S230min) The rated output power of the motor in short-time working system (S230min) shall be specified in the special technical conditions. 5.4.11 Rated output power in continuous cycle working system (S650%) The rated output power of the motor in continuous cycle working system shall be specified in the special technical conditions. 5.4.12 Rotor moment of inertia
The rotor moment of inertia of the motor shall be specified in the special technical conditions. 5.4.13 Overspeed
The motor shall be able to withstand a no-load overspeed test of 120% of the maximum speed for 2 minutes. After the test, the rotor shall not have harmful deformation that affects the performance. The performance of the motor is not affected. 5.4.14 Overload capacity
The motor runs for 2 minutes under a load of 1.2 times the rated output power of the short-time working system (S230)min). The temperature of the winding shall not exceed the provisions of the special technical conditions. 5.4.15 Temperature
When the motor winding works continuously in the continuous working area, the temperature rise of the stator winding should not exceed the provisions of the special technical conditions. 5.4.16 High and low temperature storage
When the special technical conditions require, the motor should be able to withstand the high and low temperature storage limit humidity test specified in 5.1.1. The insulation resistance under the high and low overflow conditions of the test quality inspection limit should meet the requirements of 5.1.1, and the motor should be able to operate normally under no-load. 5.4.17 Steady damp heat
When the special technical conditions require, the motor should be able to withstand the constant damp heat test with a severity level of temperature (40=2)℃, relative humidity of 90%95%, and a duration of 96h. Before the test, apply anti-rust grease to the motor shaft extension and mounting mating surface. After the test, measure the insulation resistance in the box and it should meet the requirements of 5.4.1. After the motor is taken out of the box, check that the motor should have no obvious deterioration of the appearance quality and rust that affects normal operation.
5.4.18 Commutation sparks
When the motor is continuously operated in the continuous working area, the spark level of the commutator shall be specified in the special technical conditions. 5.4.19 Noise
The maximum noise of the motor shall not exceed 80dB(A). The specific value shall be specified in the special technical conditions. 5.4.20 Reliability
The reliability of the motor is measured by the mean time between failures (MTBF). The MTBF of the motor (except for parts that are required to be replaced regularly) shall not be less than 10,000h. The specific value shall be specified in the special technical conditions. After the test, check that the rated speed and rated power of the motor shall meet the requirements of 5.4.5 and 5.4.7. 577
5.4.21 Electromagnetic compatibility (EMC)
JB/T 10271--2001
When the special technical conditions require, the conducted interference level and radiated interference level of the motor shall not exceed the provisions of Chapter 12 of GB755---2000. If there are higher requirements, they shall be specified in the special technical conditions. 5.4.22 Salt spray
When the special technical conditions require, the motor shall be able to withstand a 48h salt spray test. After the test, the motor shall be disassembled and inspected, and no part shall have obvious signs of corrosion and destructive deterioration. 5.4.23 Mildew
When the special technical conditions require, the motor shall be able to withstand a 28-day mildew test, and the mildew after the test shall not exceed the level 2 specified in GB/T2423.16.
5.4.24 Vibration
The effective value of the vibration velocity measured when the motor is unloaded shall not exceed 2.8mm/s, and shall be specified in the special technical conditions.
5.4.25 Protection level of motor housing
The protection level shall be selected in accordance with (B4208 but shall not be lower than IP54, and shall be specified in the special technical conditions. The motor must be grounded in accordance with 10.1 of (B755-2000) and shall be clearly marked. 5.4.26 Mass
The mass (g) of the motor shall be specified in the special technical conditions. 6 Test method
6.1 Test conditions
6.1.1 Atmospheric conditions for normal test
All tests, unless otherwise specified, shall be conducted under the following climatic conditions: ambient temperature: 15~35℃; relative humidity: 45%~75%; air pressure: 86~~106kPa. 6.1.2 Standard atmospheric conditions for arbitration tests When there is a dispute over the test results due to climatic conditions, the test results under the following conditions shall be used as the basis for the product judgment: ambient temperature: (20±1℃; relative humidity: 63%~~67%; air pressure: 86~106 kPa.
6.1.3 Spindle drive unit for test
The DC spindle drive unit used as test equipment shall comply with the provisions of the relevant standards. If a DC neutral source is used, the ripple factor shall not be greater than 3% of the DC voltage value.
6.1.4 Accuracy of measuring instruments and meters
Unless otherwise specified, the accuracy of electrical measuring instruments and meters shall not be lower than Class 1 during factory inspection and not lower than Class 0.5 during type inspection (except megohmmeter).
When selecting an instrument, the measured value should be between 20% and 95% of the instrument range is within a week. 6.2 Appearance inspection
Daily inspection of the appearance of the motor should meet the requirements of 5.2.1. 6.3 Appearance and installation size inspection
Use a measuring tool that can ensure the dimensional accuracy requirements to inspect the appearance and installation dimensions of the motor, which should meet the requirements of 5.2.2. 6.4 Shaft radial runout inspection
Measure the shaft radial runout according to the method specified in 9.3.1 of GB/T4772.1-1999, and its maximum value should meet the requirements of 5.2.3.
JB/T 10271—2001
6.5 Check the radial circular runout of the inner edge stop to the motor axis. Measure the radial circular runout of the flange stop to the motor axis according to the method specified in 9.3.2 of GB/T4772.1-1999. Its maximum value shall meet the requirements of 5.2.4.
6.6 Check the end face circular runout of the flange installation surface to the motor axis. Measure the end face circular runout of the flange installation surface to the motor axis according to the method specified in 9.3.3 of GB/T4772.1-1999. Its maximum value shall meet the requirements of 5.2.4.
6.7 Check the outlet mode
Visually check the outlet mode and marking of the motor. They shall meet the requirements of 5.3. 6.8 Insulation resistance test
Select the corresponding megohmmeter according to the provisions of 5.4.1, and measure the insulation resistance value of the motor winding to the housing. It shall meet the requirements of 5.4.1. 6.9 Withstand voltage test
The test uses a high voltage power supply with a frequency of 50Hz, and the power waveform is as sinusoidal as possible. The power supply power and output impedance should ensure that there is no significant waveform distortion and significant voltage change under various loads. The test equipment should be able to distinguish between winding leakage current and surge current. The motor is applied with test voltage according to the provisions of 5.4.2. The voltage value should start from no more than half of the full value of the test voltage. Then it is gradually increased to the full value evenly or at a step of no more than 5% of the full value. The time for the voltage to increase from half value to full value should be no less than 10$, and it should be maintained at the full value for 1 minute. During the entire test process, the voltage peak should not exceed 1.5 times the specified effective value, and the fault indicator should be monitored to determine whether the motor has breakdown discharge. And monitor the effective value of the leakage current, which should comply with the provisions of 5.4.2. At the end of the test, the test voltage should be gradually reduced to zero to avoid surges. After the test, measure the insulation resistance according to 6.8, which should comply with the requirements of 5.4.1. 6.10 No-load current test
The motor is running at no-load and maximum speed, and the no-load current on the motor armature winding is measured. Its maximum value shall comply with the provisions of 5.4.3.
6.11 Rotation direction test
The motor and the drive unit (or a DC power supply) form a test device. The motor is wired and powered according to the provisions of 5.3. When the drive unit is given as positive, the rotation direction of the motor shaft shall comply with the provisions of 5.4.4. 6.12 Rated speed test
The motor and the drive unit (or a DC power supply) form a test device. The test environment shall not be affected by external radiation and airflow. The drive unit inputs the rated speed command, and then gradually increases the load to the rated value. It runs continuously until the temperature rise of the motor is stable. When the temperature rise of the motor does not exceed the provisions of 5.4.15, the speed measured at this time shall comply with the requirements of 5.4.5. 6.13 Rated torque test
The motor and the drive unit (or a DC power supply) form a test device. The test environment shall not be affected by external radiation and airflow. The drive unit inputs the rated speed command, and then gradually increases the load to the rated value, and runs continuously until the motor temperature rise stabilizes. When the motor temperature rise does not exceed the provisions of 5.4.15, measure the maximum torque at the rated speed, and its value should comply with the provisions of 5.4.6. 6.14 Rated power test
The motor and the drive unit (or a DC power supply) form a test device, and the test environment should not be affected by external radiation and airflow: the motor applies the rated torque at the rated speed and runs continuously until the motor temperature rise stabilizes. When the motor temperature rise does not exceed the provisions of 5.4.15, the motor output power value should comply with the provisions of 5.4.7. 6.15 Maximum speed test
The motor and the drive unit (or a DC power supply) form a test device, and the test environment should not be affected by external radiation and airflow. Apply the maximum torque allowed at the highest speed to the motor shaft, and gradually increase the speed to the specified value of 5.4.9, and run continuously until the motor temperature rise stabilizes. Check that the motor temperature rise should be within the specified range of 5.4.15. 6.16 Rated output power test and maximum voltage test during short-time working system (S230min) The motor and the drive unit (or a DC power supply) form a test device. The motor runs at the rated speed and applies the rated output power specified in 5.4.10. It runs continuously for 30min. The temperature rise of the motor should not exceed the requirements of 5.4.15. At the same time, the voltage between the motor terminals should meet the requirements of 5.4.8.
JB/T10271-2001
6.17 Rated output power test during continuous cycle working system (S650%) The motor and the drive unit (or a DC power supply) form a test device. The motor runs at the rated speed and applies the rated output power specified in 5.4.11. Then it works continuously for 2h with a load cycle time of 10min and a load duration of 50%. The temperature rise of the motor should not exceed the requirements of 5.4.15.
6.18 Rotor inertia test
The motor inertia shall be tested in accordance with the provisions of Chapter 16 of GB/T1311--1989, and the results shall comply with the provisions of 5.1.12. 6.19 Overspeed test
The motor under test may be driven by other motors to increase the speed to 1.2 times the maximum speed and run at no load for 2 minutes. The results shall comply with the provisions of 5.4.13. 6.20 Overload capacity test
The motor shall run for 2 minutes at a load of 1.2 times the rated output power of the short-time working system (S230min). The temperature rise of the motor shall not exceed the provisions of 5.4.15.
6.21 Temperature rise test
The temperature of the motor winding is measured by the resistance method. The motor and the drive unit (or DC power supply) form a test device, and the test environment should not be affected by external radiation and airflow.
The motor is placed at room temperature and reaches a stable temperature when it is not powered on. The cold stator winding resistance R is measured and the room leakage 81 at this time is recorded. Then the motor is operated at the rated power point until the temperature rise of each part of the motor reaches a thermally stable state. During the test, the voltage, current and input power of the motor under test, as well as the temperature of the stator core, bearings, cooling medium at the inlet and outlet of the air duct and the surrounding cooling medium are recorded every 30 minutes. When the thermally stable state is reached, the hot stator winding resistance R2 is measured and the room temperature 6 at this time is recorded. In order to shorten the test time, an appropriate overload can be applied at the beginning of the temperature rise test. The temperature rise is calculated according to formula (1) and should meet the requirements of 5.4.15. 0 0. RR×(235+)+ 0.
Where: -—Temperature when measuring the initial resistance of the winding (cold state), ℃: -…Temperature of the winding at the end of the thermal test, ℃; .-Temperature of the cooling medium at the end of the thermal test, ℃; R.-Resistance of the winding when the temperature is 0. (cold state), 2; R~Resistance of the winding at the end of the thermal test. Q. ()
The above measurement of the temperature at the end of the thermal test requires rapid shutdown, careful operating procedures and sufficient personnel. If the motor does not exceed 30 after the power is cut off, the measured winding resistance reading can be directly used as the data for temperature rise calculation. If it exceeds 305, the correction shall be in accordance with the provisions of GI3755.
The correction of the temperature rise limit when the altitude or ambient air temperature of the test site is different shall be in accordance with the provisions of GB755. 6.22 High and low temperature storage test
This test shall be carried out only when required by special technical conditions. 6.22.1 High temperature storage test
Place the motor in a high temperature box, raise the temperature in the box to (55 ± 2) °C, and after reaching thermal equilibrium (generally speaking, no less than 1 hour), keep the temperature in the box constant, and place the motor without power for 4 hours. Measure the insulation resistance immediately after the test period, and it should meet the requirements of 5.4.1. Then, gradually reduce the temperature to normal atmospheric conditions and place it under this condition for 4 hours. The cooling time in the box is not included in the placement time: then check the appearance and power on, the motor should be able to work normally. 6.22.2 Low temperature storage test
Place the motor in a low temperature box, lower the temperature in the box to - (40 ± 2) °C, and after reaching thermal equilibrium (generally speaking, no less than 1 hour), keep the temperature in the box constant, and place the motor without power for 4 hours. Measure the insulation resistance immediately after the test period, and it should meet the requirements of 5.4.1. Then, gradually raise the temperature to normal atmospheric conditions and place it under this condition for 4 hours. The temperature rise time in the box is not included in the placement time.580
JB/T 10271-2001
Then check the appearance and turn on the power. The motor should be able to work normally. 6.23 Steady damp heat test
This test is only carried out when the special technical conditions require it. The motor shaft extension and mounting mating surface are coated with anti-rust grease, and a steady damp heat test is carried out in accordance with the provisions of GB/T2423.31993. The severity level is in accordance with the provisions of 5.4.17. After the test, it should meet the requirements of 5.4.17 and 5.4.1. 6.24 Commutation spark test
The motor commutation spark test is carried out immediately after the temperature rise test. The motor is operated at rated power, and the commutation spark under the brush is observed. The spark level should meet the provisions of 5.4.18. 6.25 Noise test
The motor is running at no load at the highest speed. The noise of the motor is measured according to the provisions of GB/T10069.1. It shall meet the requirements of 5.4.19.
6.26 Reliability test
The motor is tested for reliability according to Table 7 at half the rated power and half the rated speed. In each installation position, the motor changes its rotation direction every 8 hours. Continuous test time exceeding 4 hours can be accumulated. After the test, the motor shall meet the requirements of 5.4.20.
Rated power of motor
6.27 Electromagnetic compatibility test
Installation position
Downward, horizontal
Time distribution
Downward, horizontal each account for 1/2
Total time
When the special technical conditions require it, the electromagnetic compatibility test inspection shall be carried out according to the provisions of Chapter 12 of GB7552000. And it shall meet the requirements of 5.4.21.
6.28 Salt spray test
When the special technical conditions require it, the salt spray test shall be carried out according to the method specified in GB/T2423.17. After the test, the motor shall comply with the provisions of 5.4.22.
6.29 Mildew test
When the special technical conditions require it, the mildew test shall be carried out according to the method specified in GB/T2423.16. After the test, the motor shall comply with the provisions of 5.4.23.
6.30 Vibration test
The vibration test shall be carried out according to the method specified in GB10068. The test results shall comply with the requirements of 5.4.24. 6.31 Enclosure protection grade test
The enclosure protection grade test shall be carried out according to the relevant provisions of GB4208 and shall comply with the requirements of 5.4.25. And check the grounding of the motor according to the requirements of 5.4.25.
6.32 Mass
Use a scale with an inductance of not less than 1% to weigh the mass (g) of the motor, which shall comply with the requirements of 5.4.26. 7 Inspection rules
7.1 Inspection classification
The inspection of motors is divided into factory inspection and type inspection. 7.2 Items and rules for factory inspection
The items for factory inspection shall be in accordance with the provisions of Table 8.25 Noise test
The motor is running at no load at the highest speed. The noise of the motor is measured according to the provisions of GB/T10069.1. It shall meet the requirements of 5.4.19.
6.26 Reliability test
The motor is tested for reliability according to Table 7 at half the rated power and half the rated speed. In each installation position, the motor changes its rotation direction every 8 hours. Continuous test time exceeding 4 hours can be accumulated. After the test, the motor shall meet the requirements of 5.4.20.
Rated power of motor
6.27 Electromagnetic compatibility test
Installation position
Downward, horizontal
Time distribution
Downward, horizontal each account for 1/2
Total time
When the special technical conditions require it, the electromagnetic compatibility test inspection shall be carried out according to the provisions of Chapter 12 of GB7552000. And it shall meet the requirements of 5.4.21.
6.28 Salt spray test
When the special technical conditions require it, the salt spray test shall be carried out according to the method specified in GB/T2423.17. After the test, the motor shall comply with the provisions of 5.4.22.
6.29 Mildew test
When the special technical conditions require it, the mildew test shall be carried out according to the method specified in GB/T2423.16. After the test, the motor shall comply with the provisions of 5.4.23.
6.30 Vibration test
The vibration test shall be carried out according to the method specified in GB10068. The test results shall comply with the requirements of 5.4.24. 6.31 Enclosure protection grade test
The enclosure protection grade test shall be carried out according to the relevant provisions of GB4208 and shall comply with the requirements of 5.4.25. And check the grounding of the motor according to the requirements of 5.4.25.
6.32 Mass
Use a scale with an inductance of not less than 1% to weigh the mass (g) of the motor, which shall comply with the requirements of 5.4.26. 7 Inspection rules
7.1 Inspection classification
The inspection of motors is divided into factory inspection and type inspection. 7.2 Items and rules for factory inspection
The items for factory inspection shall be in accordance with the provisions of Table 8.25 Noise test
The motor is running at no load at the highest speed. The noise of the motor is measured according to the provisions of GB/T10069.1. It shall meet the requirements of 5.4.19.
6.26 Reliability test
The motor is tested for reliability according to Table 7 at half the rated power and half the rated speed. In each installation position, the motor changes its rotation direction every 8 hours. Continuous test time exceeding 4 hours can be accumulated. After the test, the motor shall meet the requirements of 5.4.20.
Rated power of motor
6.27 Electromagnetic compatibility test
Installation position
Downward, horizontal
Time distribution
Downward, horizontal each account for 1/2
Total time
When the special technical conditions require it, the electromagnetic compatibility test inspection shall be carried out according to the provisions of Chapter 12 of GB7552000. And it shall meet the requirements of 5.4.21.
6.28 Salt spray test
When the special technical conditions require it, the salt spray test shall be carried out according to the method specified in GB/T2423.17. After the test, the motor shall comply with the provisions of 5.4.22.
6.29 Mildew test
When the special technical conditions require it, the mildew test shall be carried out according to the method specified in GB/T2423.16. After the test, the motor shall comply with the provisions of 5.4.23.
6.30 Vibration test
The vibration test shall be carried out according to the method specified in GB10068. The test results shall comply with the requirements of 5.4.24. 6.31 Enclosure protection grade test
The enclosure protection grade test shall be carried out according to the relevant provisions of GB4208 and shall comply with the requirements of 5.4.25. And check the grounding of the motor according to the requirements of 5.4.25.
6.32 Mass
Use a scale with an inductance of not less than 1% to weigh the mass (g) of the motor, which shall comply with the requirements of 5.4.26. 7 Inspection rules
7.1 Inspection classification
The inspection of motors is divided into factory inspection and type inspection. 7.2 Items and rules for factory inspection
The items for factory inspection shall be in accordance with the provisions of Table 8.
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