JB/T 5276-1991 General technical requirements for small power DC motors
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 5276-1991
General Technical Conditions for Small Power DC Motors Published on 1991-06-28
Implementation on 1992-07-01 by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
General Technical Conditions for Small Power DC Motors 1 Subject Content and Scope of Application
JB/T5276-1991
This standard specifies the basic requirements and test methods for small power DC motors (hereinafter referred to as motors). It also makes corresponding provisions for inspection rules, marking, packaging, transportation and storage. This standard applies to permanent magnet and electromagnetic small power DC motors with a continuous rated power not exceeding 1.1kW when converted to 1500r/min. This standard should be used together with professional technical conditions. Special requirements for motors and other requirements not specified in this standard should be specified in professional technical conditions.
The motors applicable to this standard shall comply with GB12350-90 "Safety requirements for small power motors". 2
Referenced standards
GB12350
GB1993
GB2828
Priority numbers and priority number systems
Safety requirements for small power motors
Motor structure and installation type code
Motor housing protection classification
Motor cooling method
Basic technical requirements for rotating motors
Batch inspection counting sampling procedures and sampling tables General technical conditions for small power motors
GB2829
Periodic inspection counting sampling procedures and sampling tables GB10069.1 Rotating motor noise determination method and limit GB100 68.1)
Determination method and limit of vibration of rotating motor
GB3907
GB1971
GB12665
3 Type
3.1 Frame size
Basic measurement method of industrial radio interference
Motor line terminal marking and rotation direction
Damp heat test requirements for motors used in general environmental conditions Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method The frame sizes are: 20, 24, 28, 32, 36, 45, 55, 70, 90, 110, 130, 160 (the frame size is the same as the outer diameter), a total of 12 frame sizes.
3.2 Structural type
The structural type of the motor shall be manufactured in accordance with the provisions of Table 1 (see GB997) 3.3 Enclosure protection grade
The enclosure protection grade of the motor shall be in accordance with the provisions of GB4942.1. 3.4 Cooling method
Approved by the Ministry of Machinery and Electronics Industry on June 28, 1991 and implemented on July 1, 1992
The cooling method of the motor shall be in accordance with the provisions of GB1993. Structure and
Technical requirements
Environmental conditions for use
Altitude shall not exceed 1000m.
4.1.2 Ambient temperature
JB/T5276-1991
Structure and installation code
The ambient temperature varies with the seasons, and the highest temperature shall not exceed 40℃. Machine
20~110
20~160
70~160
4.1.3 Relative humidity of ambient air
The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. 4.2 Operating conditions
The root mean square ripple coefficient of the power supply voltage when the motor is running shall comply with the provisions of GB5171. 4.2.1
The deviation between the power supply voltage and the rated voltage shall comply with the provisions of GB5171. 4.2.2
4.8 Working system and quota
The working system and quota shall comply with the provisions of GB755.
The rated voltage of the motor is: 3, 6, 12, 24, 48, 60, 110, 220V4.41
4.5 The rated output of the motor is expressed by rated power (W) or rated torque (mNm). 4.5.1 The rated power is selected according to the following provisions: 0.4, 0.6, 1.0, 1.6, 2.5, 4, 6, 10, 16, 25, 40, 60, 90, 120, 180, 250, 370, 550, 750, 1100W.
4.5.2 The rated torque should be selected according to R20 and its derived series of GB321. 4.6 The motor shall be manufactured according to the following rated speeds: 400, 500, 750, 1000, 1500, 2000, 2500, 3000, 4000, 5000, 6000, 8000, 10000, 12000, 15000, 18000, 20000, 25000, 30000 r/min. The speed tolerance of the motor shall comply with the provisions of GB5171. 4.7 Overall dimensions and installation dimensions
The appearance and installation dimensions of the motor shall comply with the provisions of the special technical conditions. 4.8 Appearance and assembly quality
4.8.1 Appearance
The motor shall have a neat appearance, and there shall be no rust and mechanical damage on the metal surface, and no bubbles in the surface paint. 4.8.2 Assembly quality
The motor wire shall be flexible in the brush box and shall not be stuck, and the fasteners shall not be loose. 4.8.2.1
4.8.2.2 Axial clearance
The axial clearance of the motor shall comply with the provisions of the special technical conditions. 4.8.2.3
Radial runout of shaft extension and radial runout of commutator surface 2
JB/T5276-1991
The radial runout of the shaft extension and commutator surface of the motor shall comply with the provisions of the special technical conditions. The radial runout of the flange stop to the motor axis and the end face runout of the flange mating surface to the motor axis shall comply with the provisions of the special technical conditions. 4.8.2.4
|The parallelism tolerance of the motor axis to the foot support surface and the flatness tolerance of the foot support surface shall comply with the provisions of 4.8.2.5
of the special technical conditions.
Insulation resistance
The insulation resistance between the conductive parts of the motor and the casing and between the windings shall not be less than 20MQ in normal state and not less than 1Ma in hot state.
Insulation dielectric strength
The conductive parts of the motor and the casing shall be able to withstand a 1-min withstand voltage test without breakdown. The frequency waveform of the test voltage is an actual sine wave, and the effective value of the test voltage shall be in accordance with the provisions of Table 2. For 50Hz,
3, 6, 12, 24
48, 60
110, 220
voltage (
300V or
500V+2 rated voltage specified by the product standard of this type), the motor should not be subjected to this test repeatedly during acceptance. However, if the user requests, only one more withstand voltage test is allowed, and the test voltage is 80% of the original test voltage. The motor should be able to withstand the overspeed test specified in Table 3 for 2min without harmful deformation. Table 3
Motor Type
Permanent magnet and shunt-assisted, separately excited, compound motors with a speed adjustment rate of 35% or less Series-excited motors and compound motors with a speed adjustment rate of more than 35% Note: The overspeed requirements of various types of motors are specified by the standards of such products. Turn-to-turn insulation
Overspeed requirements
1.3 times the maximum rated speed
1.5 times the maximum rated speed
Permanent magnet motors and shunt-excited, separately excited and compound motors should be able to withstand 130% of the rated voltage and run for 3 minutes without load. If the motor is broken down, the insulation test between lines will not be carried out on the series-excited motor. 4.18
Wire outlet method and terminal marking
Wire outlet method of the motor: lead wires are used for frame sizes 45 and below, terminal blocks are used for frame sizes 55 to 160, and lead wires can also be used, which are specified by the standards of this type of product. The marking of the winding terminals shall comply with the provisions of GB1971. 4.14 Rated data, rotation direction and commutation 4.14.1 The rated data and rotation direction of the motor shall comply with the provisions of the special technical conditions. 4.14.2 The commutation spark level of the motor shall comply with the provisions of GB755. For series The commutation spark of the motor in continuous duty mode shall not exceed level 10; a.
For the commutation spark of the motor in short-time duty mode, it shall not exceed level 2. b.
Occasional overcurrent
JB/T5276-1991
The motor shall be able to withstand 1.5 times the rated current for 1 minute at rated voltage without stalling, winding burnout or harmful deformation. 4.16 Magnetic stability of permanent magnet motor
The motor shall be able to start directly at 1.1 times the rated voltage without deterioration of the performance of the permanent magnet. The motor shall be able to withstand 1.5 times the rated current for 1 minute without stalling, winding burnout or harmful deformation.After direct starting in both forward and reverse directions at 1 times the rated voltage, the no-load current should be less than 1.5 times that before the test. 4.17 Temperature rise
The temperature rise limit of the motor shall be in accordance with the provisions of GB5171. When the altitude or ambient temperature of the test site is different from that of the operating site, the correction of the temperature rise limit shall be in accordance with the provisions of GB5171. 4.18 Noise
The noise limit of the motor shall be specified in the special technical conditions. 4.19 Vibration
The vibration limit of the motor shall be specified in the special technical conditions. 4.20 Radio interference
The specific requirements for radio interference of the motor shall be in accordance with the special technical conditions. 4.21 Damp heat
The motor shall be able to withstand the alternating damp heat test at 40 ± 2°C and relative humidity of 90% to 95%, and the test cycle shall be 6d. After the test, the insulation resistance between the motor winding and the casing and between the windings measured in the box shall not be less than the following values; a.
For motors with a rated voltage of 24V or above, it is 0.22M9; for motors with a rated voltage of 24V and below, it is 0.1MQ; if necessary, according to test Ca: when the constant damp heat test is carried out, the test cycle is 2d, and the insulation resistance of the motor shall not be less than 1MQ. b. The insulation withstand voltage between the motor winding and the casing and between the windings shall be able to withstand 85% of the standard test voltage of the corresponding product, and the insulation shall not be broken down for 1min.
4.22 Working period
The working period of the motor shall comply with the provisions of the special technical conditions. After the working period test, check the rated data. 3 Weight
The weight of the motor shall comply with the provisions of the special technical conditions. 5 Test method
Test conditions
All tests shall be carried out under the following conditions unless otherwise specified. a. The ambient temperature is 15~35℃, and the relative humidity is 45%~75%b. The accuracy of electrical measuring instruments shall not be lower than Class 1 during inspection test and not lower than Class 0.5 during type test;c. The motor is in a horizontal position,
d. The power supply is a DC generator with sufficient capacity or a static DC regulated power supply with a ripple factor that meets GB5171. 5.2 Appearance and assembly quality
5.2.1 Appearance inspection
Inspect the surface of the motor for rust, mechanical damage, and whether the surface paint is intact. 5.2.2 Assembly quality inspection
5.2.2.1 Check whether the brush is flexible and in good contact with the commutator, and whether the motor parts are tight. 5.2.2.2 Checking the axial clearance
Fix the motor shaft or stator horizontally, place the micrometer on one end of the housing or shaft end, and apply the force specified in the special technical conditions to the housing or shaft axially. Move it in one direction first, then in the opposite direction. The difference between the two readings of the micrometer is the axial clearance, and its value should comply with the provisions of Article 4.8.2.3.
JB/T5276-1991
5.2.2.3 Radial runout of shaft extension and radial runout of commutator surface Fix the motor, and when rotating the motor shaft, use a micrometer to measure the radial runout value at half of the shaft extension joint and the radial runout value at half of the effective length of the commutator. The value should comply with the provisions of Article 4.8.2.8. 5.2.2.4 Radial runout of flange stop to axis and face runout of flange mating surface to axis Fix the motor shaft and rotate the stator with a micrometer. The radial runout of flange stop to axis and face runout of flange mating surface to axis shall meet the requirements of 4.8.2.4. 5.2.2.5 Parallelism of motor axis to foot support surface and flatness of foot support surface The parallelism of motor axis to foot support surface and flatness of foot support surface shall be checked with special equipment. The inspection results shall meet the requirements of 4.8.2.5.
Overall dimensions and installation dimensions of motor
The overall dimensions and installation dimensions of motor shall meet the requirements of 4.7 when measured with vernier caliper, micrometer and special measuring tools. 5.4
Insulation resistance
The insulation resistance of motor shall be measured with a megohmmeter. The voltage of megohmmeter shall be as specified in Table 4. The measurement results shall comply with the provisions of Article 4.9. Expensive
Motor rated voltage
24 and below
>24~220
5.5 Overspeed
Megohmmeter voltage value
The motor is no-load and the voltage is increased or driven by other machinery to make the motor reach the speed requirements specified in Table 3 for 2 minutes. The test results shall comply with the provisions of Article 4.11.
5.6 Inter-pole insulation strength
For permanent magnet, parallel-assisted, other-excited, and compound-excited motors, add 130% of the rated voltage and run no-load for 3 minutes. The test results shall comply with the provisions of Article 4.12.
5.7 Outlet mode and line terminal marking
Check the outlet mode and line terminal marking, which shall comply with the provisions of Article 4.13. 5.8 Rated data, direction of rotation and commutation
The motor is operated at rated voltage and rated load torque to check the direction of rotation, measure the speed and current, and observe the commutation sparks. Whether the bearing runs normally, the inspection results shall comply with the provisions of Article 4.14. 5.9 Insulation dielectric strength
The capacity of the test equipment shall not be less than 0.5kVA. During the test, the voltage applied shall start from no more than half of the full value of the test voltage, gradually increase to the full value of the test voltage, and then quickly drop to less than 50% of the full value before disconnecting the power supply. The test results shall comply with the provisions of Article 4.10. 5.10 Magnetic stability inspection of permanent magnet motor The motor is directly started alternately in both the forward and reverse directions at 1.1 times the rated voltage for 5 times each. The inspection results shall comply with the provisions of 4.16. 5.11 Accidental overcurrent
The motor is operated at rated voltage, and the load current reaches 1.5 times the rated current value by increasing the torque for 1 minute. The test results shall comply with the provisions of Article 4.15.
5.12 Temperature rise
The temperature rise test uses a dynamometer or two motors of the same model to tow each other. The test bracket and heat sink are in accordance with the provisions of GB5171. The motor is operated at rated voltage and rated load torque until the surface temperature of the casing changes by no more than 0.5℃ in half an hour. The temperature rise of the armature winding and the stator winding is measured by the resistance method. The conditions during the temperature rise test are in accordance with the provisions of Articles 4.1 and 4.2. The test results should comply with the provisions of Article 4.17. The temperature rise △t (K) of the copper wire winding is determined by the following formula: At=RRbZxz.net
JB/T5276-1991
(235+t)+t,-t2
Where: R2—winding resistance at the end of the test, Q: R,—winding resistance in cold state, Q
t,——temperature when measuring resistance R,, ℃t2 temperature when measuring resistance R2, ℃.
For aluminum windings, 225 should be used instead of 235 in the formula. The winding resistance R2 is the value measured within 15s after the motor is powered off. If it cannot be measured within 15s, it should be obtained by extending the cooling curve and extrapolating it to 15s after the power is off. 5.18 Noise
The noise of the motor shall be measured in accordance with the method specified in GB10069, and the measurement results shall comply with the provisions of Article 4.18. 5.14 Perturbation
The vibration of the motor shall be measured in accordance with the method specified in GB10068, and the measurement results shall comply with the provisions of Article 4.19. 5.15 Radio interference
The radio interference of the motor shall be measured in accordance with the method specified in GB3907, and the measurement results shall comply with the provisions of Article 4.20. 5.16 Wet heat
The metal surface of the motor without coating is coated with anti-rust grease, placed in a test box and tested in accordance with the provisions of GB12665. The test results shall comply with the provisions of Articles 4 and 21.
5.17 Working period
The test can be carried out by using two motors of the same model towing each other or by driving other loads in accordance with the provisions of Article 4.22. The dimensions of the metal bracket and the base plate during the test are the same as those specified in Articles 5 and 12. During the test, it is allowed to wipe the commutator with a clean white cloth soaked in cleaning alcohol or gasoline. The wiping interval is specified by the special technical conditions.
For motors running in both directions, the direction of rotation is changed every 8 hours. The test results shall comply with the provisions of Article 4.22.
It is allowed to replace the brushes individually during the test, but the new brushes after replacement shall be re-grinded in no-load operation, and the brush running-in surface area shall not be less than 70%.
5.18 Weight
Weigh the weight of the motor with a balance or industrial scale, and the measurement results shall comply with the provisions of Article 4.23. Inspection rules
6.1 The tests of motors are divided into inspection tests and type tests. 6.1.1 The motors shall undergo inspection tests. Inspection and testing shall be in accordance with the provisions of GB2828. This standard recommends the following: a. General inspection level I; b. Qualified quality level, AQL0.40～AQL6.5s sampling plan: one normal inspection plan. c. The AQL value of the product shall be specified by the product-specific technical conditions. 8.1.2 Type test shall be conducted in any of the following cases. a. When trial production of new products is completed;
b. When the changes in motor design or process are sufficient to cause changes in certain performances, relevant type test items shall be conducted. When the inspection test results deviate unacceptably from the results of previous type tests c.
JB/T5276-1991
Regular sampling type test shall be conducted once every two years, but the service life test shall be conducted at least once every four years. d.
The motor energy of type test shall be in accordance with the provisions of GB2829. This standard recommends: 6.1.3
General inspection level: Ⅱ
Unqualified quality level: RQL40~RQL65
Sampling plan: secondary sampling plan.
The RQL value of the body shall be specified by the product-specific technical conditions. When conducting type tests on motors with the same frame number but different specifications, it is allowed to group the motors, put motors with similar characteristics into one group, and select one type of motor from each group for type tests. Only typical products are selected for service life tests. Motors undergoing damp heat tests and service life tests are not allowed to undergo other type test items. The test items and basic sequence of the motor are as shown in Table 5. 6.2 Assembly quality Overall dimensions and installation dimensions 1) Axial clearance Radial runout of shaft extension and commutator 1) Radial runout of flange stop to axis and end face runout of flange mating surface to axis 1) Parallelism of axis to foot support and flatness of foot support surface 1) Insulation resistance Inter-insulation Wiring mode and terminal marking Magnetic stability requirements Rated data, direction of rotation and commutation Dielectric strength of insulation Accidental overcurrent Technical requirements Test method Radio interference =) Working period JB/T 52761991
Technical requirements
Test method
Note: 1) Random inspection is allowed, and the number of random inspections shall be carried out in accordance with GB2828. If unqualified items are found in the random inspection, the items of the batch of products must be checked one by one. 2) It shall be carried out only when required in the special technical conditions. Quality assurance period
The quality assurance period shall be in accordance with the provisions of GB5171 or special technical conditions. 8.
Marking, packaging, transportation and storage
The data on the nameplate shall ensure that the handwriting is clear during the use of the motor. The nameplate content shall be in accordance with the provisions of GB5171, but at least include:
Rated power, W or rated torque mN. my
Rated voltage, V,
Rated current, A
Rated speed, r/mins
Manufacture number and date;
Manufacturer name and trademark.
Note: The power, voltage, current and speed are not allowed to be marked for frame sizes 45 and below. The packaging and transportation of motors shall comply with the provisions of GB5171. 8.2
The storage of motors shall comply with the provisions of GB5171. Additional notes:
This standard was proposed and managed by the Guangzhou Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Boshan Motor Factory, Tianjin Safety Motor Co., Ltd., Benxi Micro Motor Factory and other units. The main drafters of this standard are Lu Zhaotong and Liu Fugui. 8
People's Republic of China
Mechanical Industry Standard
General Technical Conditions for Small Power DC Motors JB/T 52761991
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Number of words XXX,XXX
Format 880×1230
Sheet X/X
Edition X, XX, 19XX
Xth printing, XX, 19XX
Number of copies 1-XXX
Price XXX.XX Yuan
XX-XXX
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