JB/T 5866-1991 General technical requirements for wide speed adjustable permanent magnet DC servo motors
Some standard content:
Mechanical Industry Standard of the People's Republic of China
General Technical Conditions for Wide-Speed Regulated Permanent Magnet DC Servo Motors Subject Content and Scope of Application
JB5866—91
This standard specifies the general technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of wide-speed regulated permanent magnet DC servo motors.
This standard applies to wide-speed regulated permanent magnet DC servo motors (hereinafter referred to as motors). This standard should be used together with the special technical conditions for wide-speed regulated permanent magnet DC servo motors. The specific technical indicators and additional or special requirements of the motor are specified in the special technical conditions. 、Cited standards
GB2806
GB2807
GB2900.26
GB5872
GB7345
GB10405
3 Terms
Rated power
Basic technical requirements for rotating electrical machines
Measurement method for motor noise
Measurement method for motor vibration
Electrical terminology Controlled micro motor
Technical conditions for packaging of controlled micro motor
Basic technical requirements for controlled micro motor
Model naming method for controlled micro motor "
In the continuous working area, the maximum power that the motor can output 3.2 Rated torque
In the continuous working area The maximum torque that the motor can output in the continuous working area. 3.3 Rated current
The current corresponding to the rated torque in the continuous working area. 3.4 Maximum operating speed
The maximum speed at which the motor is allowed to work.
3.5 Maximum voltage
The armature terminal voltage corresponding to the maximum operating speed when the motor is no-load. 4 Product classification
4.1 Model naming
The motor model is composed of four parts: frame number, product name code, performance parameter serial number and derived code according to GB10405. Approved by the Ministry of Machinery and Electronics Industry on October 24, 1991 and implemented on October 1, 1992
Frame number
4.1.1 Model example
JB586691
Product code
Performance parameter serial number
Product name code
First derivative code
First performance parameter
The frame size of the wide-speed DC servo motor with a tachometer is 130
4.1.2 Frame size
The frame size is represented by the outer diameter (mm) of the motor casing (core segment). 4.1.3 Product name code
SZK is used to represent a wide-speed DC servo motor, where S stands for servo, Z stands for DC, and K stands for wide speed regulation. When the motor is equipped with a tachometer generator, a rotary transformer, a photoelectric encoder or an electromagnetic brake, the symbols representing each component are added after SZK-- as the product name code, with C representing the tachometer, X representing the rotary transformer, and M representing the photoelectric encoder. Electric encoder, Z represents electromagnetic brake. When the motor is equipped with more than two components, the order of the symbols representing each component added after SZK is C, X, M, Z. 4.1.4 Performance parameter serial number
The performance parameter serial number is represented by two digits from 01 to 99. 4.1.5 Derived code
The derived code is represented by Chinese phonetic letters A, B, C, *., etc. (except letters I and O). Rated data and insulation level
The insulation level and the following rated data must be listed in the special technical conditions of the motor: a.
Rated power, W;
Rated torque, N·M
Rated current, A;
Maximum operating speed, r/min;
Maximum voltage, V.
4.3 Structural form
The structural form is end flange installation or foot installation. 4.4 Electrical schematic diagram
The electrical schematic diagram is shown in Figure 1.
Technical requirements
Environmental conditions for use
Temperature: -10~+40℃.
Relative humidity: 90%~95%
JB5866-91
Air pressure: 74.8KPa, (561mmHg2500m)Vibration: 10Hz, double amplitude: 1.5mm
Peak value of impact acceleration: 70m/s2
5.2 Wire-out method and marking
The lead-out wire of the motor can be directly led out, or it can be led out through a terminal board, a terminal post or a special plug socket. The lead-out wire should be clearly marked. The marking should comply with the provisions of the special technical conditions.
5.3 Appearance and assembly quality
5.3.1 Appearance
The appearance of the motor shall comply with the provisions of Article 3.2.1 of GB7345. 5.3.2 Brush running-in quality
The brush running-in surface shall not be less than two-thirds
5.3.3 Appearance and installation dimensions
The appearance and installation dimensions of the motor shall comply with the provisions of the special technical conditions. 5.3.4 Axial clearance
The axial clearance of the motor shall comply with the provisions of Table 1. Table 1
Frame size
Axial clearance
5.3.5 Radial runout of shaft extension
90~160
The radial runout of the outer circle matching surface of the motor shaft extension shall comply with the provisions of Table 2. Table 2
Radial runout of shaft extension
≤160
Coaxiality of installation matching surface and verticality of installation matching end surface>160
JB5866-91
Coaxiality of installation matching surface and verticality of installation matching end surface shall comply with the provisions of Table 3. Table 3
Frame size
Coaxiality of installation matching surface
Verticality of installation matching end surface
Insulation dielectric strength
130~200
The insulation dielectric strength test between the motor winding and the housing shall be able to withstand the test voltage in Table 4, and the insulation shall not be broken down. Table 4
Rated power less than 1kW and maximum voltage less than 100V; maximum voltage less than 36V
Rated power not less than 1kW and maximum voltage not less than 36V; maximum voltage not less than 100V
(effective value)
Test voltage
500V plus 2 times the maximum voltage
1000V plus 2 times the maximum voltage, but the minimum is 1500Vmm
The frequency of the test voltage is 50Hz and is actually a sine wave. Repeat this test, the test voltage should be 80% of the first test voltage Insulation resistance
Under normal test climatic conditions, the insulation resistance between the conductive part of the motor and the casing should be not less than 100Mα; under the extreme negative temperature conditions specified in Article 5.1, the insulation resistance should be not less than 50MQ; under high temperature conditions, the insulation resistance should be not less than 5MA; after the wet heat test, the insulation resistance should be not less than 2Ma.
5.6 Direction of rotation
The motor can run in both forward and reverse directions. Connect the wires according to the wiring mark. When viewed from the non-commutator end, the rotation direction of the motor shaft should be clockwise, and it is specified as the positive direction.
5.7 Forward and reverse speed deviation
When the motor is unloaded, at the highest voltage, its forward and reverse speed deviation shall not exceed 1%. 5.8
No-load starting voltage
The no-load starting voltage of the motor should not be greater than 1V plus 2% of the motor's highest voltage. 5.9
The motor should be able to withstand an overspeed of 1.2 times the maximum operating speed for 2 minutes without any harmful deformation. 5.10 Back EMF coefficient
The back EMF coefficient of the motor is expressed in V/(r.min-\ units, and its value should comply with the provisions of the special technical conditions. 5.11 DC resistance
The DC resistance of the motor with brushes R. (20℃C) should comply with the provisions of the special technical conditions. 5.12 Static friction torque
The static friction torque of the motor should comply with the provisions of the special technical conditions. 5.13 Rated current
The rated current of the motor should comply with the provisions of the special technical conditions. 5.14 Temperature rise
The temperature rise limit of the motor winding (resistance method) is as specified in Table 5 Table 5
Insulation grade
5.15 Commutation fire Flower
JB5866-91
In the continuous working area of the motor, the spark level on the commutator should not exceed 1-5.16 Thermal time constant
The thermal time constant of the motor should comply with the provisions of the special technical conditions. 5.17 Rated power
The rated power and corresponding speed of the motor should comply with the provisions of the special technical conditions. 5.18 Moment of inertia
The moment of inertia of the motor should comply with the provisions of the special technical conditions. 5.19 Mechanical time constant
The mechanical time constant of the motor should comply with the provisions of the special technical conditions. 5.20 Electrical time constant
The electrical time constant of the motor should comply with the provisions of the special technical conditions. 5.21 Torque fluctuation
The torque fluctuation of the motor should not be greater than 3%.
5.22 Current overload multiples
The current overload multiples of the motor shall comply with the provisions of the special technical conditions. Level, (measured in both positive and negative directions).
5.23 Noise
When the motor frame size is not greater than 130, the A-weighted sound power level noise shall not be greater than 75dB. When the motor frame size is greater than 130, the A-weighted sound power level noise shall not be greater than 80dB
5.24 Self-vibration
The vibration limit values of the motor are divided into three levels: N level (ordinary level), R level (first level) and S level (excellent level). The specific values are shown in Table 6. Which vibration level is met is specified by the special technical conditions. Table 6
Frame size
Vibration level
5.25Low temperature
600~1500
≤250
>1500~4000
Starting speed effective value
600~1500
>1500~4000
The motor is tested at low temperature at -10℃. After the test, the insulation resistance under the extreme negative temperature condition shall meet the requirements of Article 5.5, and the measured no-load starting voltage shall not exceed 1V. Add 4% of the maximum voltage of the motor. 5.26High temperature
The motor is tested at high temperature at +40℃. After the test, the insulation resistance under high temperature condition shall meet the requirements of Article 5.5. After the motor cools to room temperature, measure the no-load speed under the highest voltage. The change of no-load speed under the highest voltage after the high temperature test and before the low temperature test shall not exceed 2% of the speed before the low temperature test.
5.27 Constant amplitude vibration
The motor should be able to withstand a vibration intensity test with an amplitude of 1.5mm and a frequency of 10Hz for 2h. After the test, the motor should have no loose parts and mechanical damage.
5.28 Specified pulse impact
JB586691
The motor should be able to withstand a peak acceleration of 70m/s\, a pulse duration of 11±1ms, and a specified pulse impact test of 15 times each in the radial positive and negative directions of the motor for a total of 30 times. After the test, the motor should have no loose parts and mechanical damage. 5.29 Constant damp heat
Perform a damp heat test for 96h in accordance with Article 3.21.1 of GB7345. After the test, the damp heat insulation resistance should meet the requirements of Article 5.5, and the motor should have no obvious deterioration of the surface quality and rust that affects normal operation. 5.30 Weight
The weight of the motor should meet the requirements of the special technical conditions. 5.31 Lifespan
The lifespan of the motor shall not be less than 2000h. After the life test, the rated current of the motor shall comply with the provisions of Article 5.13. 6
Test method
Test conditions
6.11 Climate conditions
6.1.1.1 Normal climate conditions
Normal climate conditions shall comply with Article 3.1.1.1 of GB7345. 6.1.1.2 Arbitration climate conditions
Arbitration climate conditions shall comply with Article 3.1.1.2 of GB7345. 6.1.1.3 Reference climate conditions
Reference climate conditions shall comply with Article 3.1.1.3 of GB7345. 6.12 Test power supply
6.1.2.1 The ripple factor of the DC power supply shall not exceed 5%. 6.1.2.2 The voltage instability shall not exceed 2%. 6.1.3 Accuracy of test instruments
6.1.3.1. Both the ammeter and voltmeter are of grade 0.5. 6.1.3.2 The accuracy of the tachometer is of grade 1.
6.1.3.3 The accuracy of the torque test device is 1%. 6.1.4 Stable temperature
6.1.4.1 Stable temperature without power supply shall comply with Article 3.1.5.1 of GB7345. 6.1.4.2 Stable working temperature with power supply shall comply with Article 3.1.5.2 of GB7345. 6.2 Assembly quality
6.2.1 Appearance
Visual inspection of the motor appearance quality shall comply with Article 5.3.1. 6.2.2 Brush running-in quality
Inspection of the brush running-in quality shall comply with Article 5.3.2. 6.2.3 Appearance and installation dimensions
Use measuring tools that can ensure measurement accuracy to check the motor appearance and installation dimensions. The results shall comply with the provisions of Article 5.3.3. 6:2.4 Axial clearance
Check according to the method specified in Article 3.2.3 of GB7345. The thrust force applied to the shaft shall be in accordance with the provisions of Table 7. The results shall comply with the provisions of Article 5.3.4. Table 7
Machine frame
Axial thrust
6.2.5 Shaft extension radial runout
90~160
JB5866-91
Check according to the method specified in Article 3.2.4 of GB7345. The results shall comply with the provisions of Article 5.3.5. 6.26 The coaxiality of the installation mating surface and the verticality of the installation mating end surface shall be checked according to the method specified in Article 3.2.5 of GB7345. The results shall comply with the provisions of Article 5.3.6. 6.3 Insulation dielectric strength
Test according to the test voltage specified in Article 5.4. The applied voltage shall start from no more than half of the full value of the test voltage and then be increased steadily or in stages to the full value. The time for the voltage to increase from half value to full value shall be not less than 10 s. The full value voltage test time shall be maintained for 1 min. The result shall comply with the provisions of 5.4.
6.4 Normal insulation resistance
Use the megohmmeter specified in Table 8 to check the normal insulation resistance between the conductive part of the motor and the housing. The result shall comply with the provisions of 5.5. Table 8
Dielectric strength test voltage
≤1000
Megohmmeter voltage
6.5 Direction of rotation
The motor shall be wired and energized in accordance with the provisions of 5.2, and the direction of rotation of the shaft shall comply with the provisions of 5.6. 6.6 Forward and reverse speed deviation
When the motor is unloaded, measure the forward speed n and reverse speed nz at the highest voltage. The forward and reverse speed deviation is calculated by formula (1). In nl × 100% ...
The result shall comply with the provisions of Article 5.10.
6.7 No-load starting voltage
Before the test, the motor runs at no load for 5 minutes, and then restarts the motor. Slowly increase the voltage at the motor end until the voltage at which the shaft rotates continuously is the no-load starting voltage. Perform 3 times in each of the positive and negative directions, and take the maximum value as the no-load starting voltage. The result shall comply with the provisions of Article 5.8. 6.8 Overspeed
Adjust the voltage at the motor end to increase the motor speed to 1.2 times the maximum operating speed for 2 minutes. The result shall comply with the provisions of Article 5.9. 6.9 Back EMF coefficient
Drive the tested motor to the maximum operating speed and measure the no-load output voltage of the motor. The back EMF coefficient is calculated using formula (2): Kg
Where: Kg—back EMF coefficient, V (r.min-1); U—measured voltage, V;
—maximum operating speed, r/min.
The result should comply with the provisions of Article 5.10.
6.10 DC resistance
Before inspection, the motor reaches the non-powered stable temperature at room temperature. Block the motor and apply a DC voltage so that the current reaches a certain current not exceeding 15% of the rated current. At the same time, measure the armature terminal voltage between the motor terminals. Measure the rotor three times at different positions. The test time should be shortened as much as possible. Calculate the motor brush resistance and convert it to the resistance value at 20°C. The average value of the three points is the motor brush resistance Rm (20°C). The result should comply with the provisions of Article 5.11. 6.11 Static friction torque
Fix a torque disk with a radius of R at the end of the motor shaft extension, and hang a magnetic code with a weight of P on the torque disk. Under the action of this code, the motor rotor rotates in two opposite directions at a speed of 4 to 6 r/min, and should not stop in the middle. RP is equal to the friction torque value. The result should comply with the provisions of Article 5.12.
6.12 Rated current
JB5866-91
The motor runs with rated torque in the range of 0 to 40 r/min, and the armature current is measured. The result should comply with the provisions of Article 5.13. 6.18 Temperature rise
Before the test, the motor reaches the stable temperature without power supply under normal climatic conditions and is fixed on the temperature rise test bracket. The structure and size of the temperature rise test bracket shall be in accordance with the provisions of Appendix A.
The test environment shall not be affected by external radiation and airflow. Before the test begins, first measure the motor cold armature DC resistance R and room temperature t1, and then operate the motor at 0-40r/min and rated current. When the motor runs to the stable working temperature with power supply, measure the armature DC resistance R and room temperature t. Measure the armature terminal voltage U of the motor from cold to hot stable state, which is not less than 7 points. The method for measuring resistance is: use a double-arm bridge or other methods to measure the DC resistance between two fixed points of the commutator. The first resistance measurement should be completed within 20s after the motor is powered off. At this time, the measured resistance value can be considered as the resistance value when the motor is powered off. If the first measurement cannot be completed within 20s, it is necessary to measure two more points to determine the cooling curve of the motor, and use the regression method to find the armature resistance value when the motor is powered off. Temperature rise measurement can also be carried out by measuring the armature terminal voltage rise method under stall and rated current. The temperature rise of the armature winding is calculated according to formula (3): Q = R = R (235 + 4) + (+ -t)
Where: Q--winding temperature rise, K;
R,--winding DC resistance at the end of the test, at--ambient temperature when measuring R,, °C. Ambient temperature when measuring R,, °C.
The stable temperature rise of the armature winding shall comply with the provisions of 5.14. 6.14 Commutation spark
This test shall be carried out when the motor reaches the stable operating temperature after the temperature rise test. The motor is operated at rated power and the commutation spark under the brush is observed. The spark level shall comply with the provisions of 5.15 for the commutation spark level in the continuous working area.
6.15 Thermal time constant
According to the armature terminal voltage U measured by the temperature rise test, the time at the beginning of the test is taken as the time zero point, the test time is taken as the horizontal axis, and the voltage at each point minus the armature terminal voltage in the cold state is taken as the vertical axis. Draw a curve of the armature terminal voltage changing with time U=f(t). From this curve, find the time required for the voltage to rise to 63.2% of the stable value. This time is the thermal time constant of the motor. The result should comply with the provisions of Article 5.16. 6.16 Rated power
The motor is fixed on the temperature rise test bracket, and the test environment should not be affected by external radiation and airflow. The motor runs at rated power. The stable temperature rise of the armature winding is measured by the method in Article 6.13, and the result should comply with the provisions of Articles 5.14 and 5.17. 6.17 Rotating inertia disc
Measure the rotational inertia Ja of the motor rotor according to the method specified in Article 3.10 of GB7345. The rotational inertia measurement can also be carried out by the self-braking method. The self-braking method is: drive the motor to 1.1 times the maximum operating speed, cut off the power supply and measure the relationship between the speed and time in the range of 1.1 to 0.9 times the maximum operating speed. The moment of inertia Ja (kg.m) is calculated according to formula (4): Ja
9.3P.·△t
Where: P. - Mechanical loss at the maximum operating speed: W; n - Maximum operating speed, r/min;
△n - Difference between high and low speeds in the test, r/min; At - Time required for the speed change △n, s. The results should comply with the provisions of Article 5.18.
6.18 Mechanical time constant
6.18.1 Calculation of torque constant
Kz=9.55Kg
Where: K, is the torque constant, N·m/A
JB586691
K, is the back electromotive force coefficient value measured in 6.9, V/(r.min-1)6.18.2 Calculation of mechanical time constant
T = 104. 7 JR-(20 ℃)
Where: t is the mechanical time constant, ms;
Ja is the moment of inertia value measured in 6.17, kg.m\; R (20, ℃) is the brush resistance value measured in 6.10, n. The calculated result should meet the requirements of Article 5.19.
6.19 Electrical time constant
Stop the motor rotor, apply a step voltage to the motor, and use a memory oscilloscope to measure the waveform of the armature current changing with time. The step voltage value taken during the test should be the voltage value that can make the steady-state value of the armature current reach the rated current of the motor. Find the time required for the armature current to rise from zero to 63.2% of the steady-state value on the waveform diagram. This time is the electrical time constant of the motor. The result should comply with the provisions of Article 5.20. 6.20 Torque fluctuation
Use a dynamometer or other torque test device to measure the stall torque of the motor at 36%32 (P is the number of motor pole pairs) at 10 points. The difference between the maximum value Tm and the minimum value Ti of the stall torque is the sum of Tx and Tmin, which is the torque fluctuation of the motor. The formula is as follows:
Thaz - Tmin
=×100%:
The result should comply with the provisions of Article 5.21.
6.21 Overload
Before the overload test, measure the no-load speed of the motor when it is rotating forward at the highest voltage. (7)
Apply a step voltage to the motor to start it suddenly, and use a memory oscilloscope to measure the peak value of the impact current in the armature circuit. Select the voltage appropriately so that the peak value of the impact current in the armature circuit reaches the current of the current overload multiple specified in Article 5.22. Or block the motor rotor and apply voltage so that the motor armature current reaches the current of the current overload multiple specified in Article 5.22. Perform a test in the forward and reverse directions of the motor. After the overload test, wait for the motor to cool to the temperature before the overload test, and measure the no-load speed of the motor when it is rotating forward at the highest voltage. The speed change before and after the overload should not exceed 2% of the no-load speed measured before the test. 6.22 Noise
According to the motor noise measurement method of GB2806, the motor is measured at the highest working speed and no-load operation. The result should meet the requirements of Article 5.23.
6.23 Self-vibration
According to the motor vibration measurement method of GB2807, the motor is measured at the highest working speed and no-load operation. The result should meet the requirements of Article 5.24.
6.24 Low temperature
Before the low temperature test, measure the no-load speed of the motor when it is rotating forward at the highest voltage. The motor is placed in a low temperature test box without power, and the box temperature gradually drops to -10±2℃. Keep it warm until it reaches the stable temperature without power, and measure the insulation resistance and no-load starting voltage. The result should meet the requirements of Article 5.25. 6.25 High temperature
The motor is installed on the temperature rise test bracket, placed in the test box without power, and the box temperature gradually rises to 40±2℃. The motor reaches the stable temperature without power supply under this condition, and then the motor is operated at 0-40r/min and rated current to the stable working temperature, and the insulation resistance is checked. After the motor cools to room temperature, measure the no-load speed when it is running forward at the highest voltage. The result should comply with the provisions of Article 5.26. High temperature test is allowed to be carried out by equivalent method. 6.26 Constant amplitude vibration
JB5866-91
The motor is installed horizontally on the vibration test bench and the vibration test is carried out in accordance with the provisions of Article 5.27. The motor is not powered during the test. The result should comply with the provisions of Article 5.27.
6.27 Specified pulse impact
Perform the specified pulse impact test in accordance with the method specified in Article 3.19.1 of GB7345 and the requirements of Article 5.28. The motor is not powered during the test. The result should comply with the provisions of Article 5.28.
6.28·Constant damp heat
Conduct a constant damp heat test according to the method specified in Article 3.21.1 of GB7345. The result shall comply with the provisions of Article 5.29. 6.29 Weight
Weigh the weight of the motor with a scale with an accuracy of 1%. The result shall comply with the provisions of Article 5.30. 6.30 Life
The motor shall be installed horizontally and run at
rated torque and maximum operating speed. Change the direction every 8 hours. During the entire life test time, it is allowed to replace the brush once and clean the brush powder three times. Continuous test time exceeding 4 hours can be accumulated. After the test, the motor shall comply with the provisions of Article 5.31.
Acceptance rules
7.1 Test classification
Inspection test
Acceptance test
Identification test
Periodic test
7.2 Inspection test items and rules
Each motor shall be inspected and tested according to the inspection test items and basic sequence specified in Table 9. It can only be put into storage as a qualified product after all inspection items are qualified.
7.3 Acceptance test items and rules
The acceptance test items are the same as the inspection test items. When the ordering party needs to accept, it shall be carried out in accordance with Article 4.3 of GB7345. The qualified quality level is 2.5.
7.4 Identification test items and rules
The identification test shall be carried out in accordance with Article 4.4 of GB7345. The test items, basic sequence and prototype number shall be in accordance with Table 9. 7.5 Periodic test items and rules
Periodic test shall be carried out in accordance with Article 4.5. The test items, basic sequence and prototype number shall be in accordance with Table 9. Table 9
Technical requirements
Test classification
Identification test
Or periodic test
Inspection test
Test or acceptance test
Test items
Appearance and assembly quality
Insulation dielectric strength
Normal insulation resistance
Direction of rotation
Forward and reverse speed deviation
No-load starting voltage
Back EMF coefficient
Chapter, Article
Test method
Chapter, Article
Prototype number
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
Period test| |tt||1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3,
1, 2, 3, 4
1, 2, 3,
1, 2, 3,
1, 2, 3,
1, 2, 3, 4
Test classification
Identification test or periodic test
8 Quality assurance period
Test items
Direct current Resistance
Static friction torque
Rated current
Commutation spark
Thermal time constant
Rated power
Rotational transverse quantity
Mechanical time constant
Electrical time constant
Torque fluctuation
Self-vibration
Constant amplitude vibration
Characterized pulse shock
Specified damp heat
According to Article 5 of GB7345.
JB5866-91
Continued Table 9
Technical requirements
Chapter, Articlewww.bzxz.net
Test method
Chapter, Article
The storage period of the motor shall be specified by the special technical conditions for one year, three years or five years according to the packaging form. Prototype number
1, 2, 3, 4
2, 3, 4
1, 2, 3,
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3,
1, 2, 3,
1 , 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
1, 2, 3, 4
Phase trial
1, 2, 3, 4
1, 2, 3, 4||tt| |1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,3,4
The warranty period of the motor is calculated from the unsealing of the package and is divided into one year and two and a half years (the working time does not exceed the service life). It is stipulated by special technical conditions according to the specific situation.
Multiple markings, packaging, transportation and storage
9.1 The factory motor should have a nameplate. The handwriting and graphics on the nameplate should be clear and correct, and it should not fall off during the entire service life. The content should be clearly visible. The nameplate should be located in a conspicuous part of the motor. 9.2 The nameplate content should at least include
Name and model.
Rated data and insulation level.
Manufacturing date (or number) or production batch number. Manufacturer's mark or factory name.
9.3 The motor packaging shall be carried out in accordance with GB5872. 9.4 The packaging box or packaging box should be placed carefully during transportation to avoid collision and knocking. It is strictly forbidden to place it together with corrosive items such as acids and alkalis. 9.5 The motor should be placed in a clean and well-ventilated warehouse with an ambient temperature of -5 to +30℃ and a relative humidity of no more than 75%. The air must not contain corrosive gases.
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