Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T3699
1992-06-16
Zhang Xianji
1993-01-01
Ji Jia Xin Kui Lu Wa Yi
1 Topic Content and Applicable Scope
JB/T36991992
JB396684
This standard specifies the type, structure, size, basic parameters, technical requirements, test methods, inspection rules, marking and packaging requirements of three-phase clutch motors.
This standard applies to three-phase mechanical clutch motors (hereinafter referred to as motors) used in industrial sewing machines. 2 Reference standards
GB 5171
GR 1032
GB 10068.1
GB 10069.1
GB 12665
GB12350
GB 191
GB 2828
GB2829
JB/Z294
Motor structure and installation type code
General technical requirements for small power motors
Basic technical requirements for rotating motors
Test methods for three-phase asynchronous motors
Vibration measurement methods for rotating motors
Vibration measurement methods
Noise measurement methods and limits for rotating motors
Noise engineering measurement methods||tt ||Requirements for damp heat test of motors under normal environmental conditions Safety requirements for small power motors
Packaging, storage and transportation pictorial markings
Batch inspection Count sampling procedures and sampling tables Periodic inspection Count sampling procedures and sampling tables Insulation test methods for AC low voltage motors JR/DQ3619 General rules for classification of small power motor products 3 Type, basic parameters, structure and external installation dimensions 3.1 The structure and installation type of the motor is IMB30, and it is installed by contact with the bracket. 3.2 The rating of the motor is a continuous rating based on the continuous duty system (S1). 3.3 The rated voltage of the motor is 380V, the rated frequency is 50Hz, 3.4 The motor should be rated according to the following rated powers: 120 (100), 180 (200), 250, 370 (400), 550 W Note: The power level in brackets is preferred. 3.5 The appearance and installation dimensions of the motor shall comply with the provisions of Figure 1 and Table 1. 3.6 The base shall be installed on a cradle-type base with an adjustable center height and a shockproof block. 4 Technical requirements
4.1 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. 4.2 The motor shall be able to operate at rated speed under the following conditions of altitude, ambient air temperature and ambient air relative humidity. 4.2.1 The altitude shall not exceed 1000m.
4.2.2 The ambient air temperature varies with the seasons, but shall not exceed 40℃. 1992-06-16 1993-01-01 JB/T3699, if the motor is specified to be used at an altitude of more than 1000m or the ambient air temperature is higher than 41℃, it shall be operated in accordance with the provisions of Article 5.3.4 of CB753. 15=1:89 380max 4.2.3 The average maximum and relative humidity in the wettest month shall be 90%, and the average minimum temperature in the month shall not be higher than 25℃. 4.3 The deviation of the power supply voltage and frequency from the rated value during the operation of the motor shall comply with the provisions of Article 4.3 of GB755. 4.4 At the rated voltage and rated frequency, the guaranteed value of the ratio of the motor's stall torque to the rated torque is 2.2 times. 4.5 At rated voltage and rated frequency, the guaranteed value of the ratio of the motor's maximum torque to the rated torque is 3.0 times. 4.6 At rated voltage and rated frequency, the guaranteed value of the ratio of the motor's stall current to the rated current is 7 times. G
4.7 At rated power, rated voltage and rated frequency, the guaranteed values of the motor's efficiency and power internal number shall comply with the provisions of Table 2. During the test, the tension applied to the pull rod shall be able to meet the motor's output rated power, and the lighting power supply is open. 4.8
Motor power
120(1c0)
180(2G0)
370(400)
JB/T3699
The tolerance of the guaranteed value of the motor's electrical performance shall comply with the provisions of Table 3. Table 3
Power factor
Locked-rotor torque
Locked-rotor current
Maximum rotor
Power factor
—0. 15(1—3
—(cosg/6
guaranteed value -15%
guaranteed value +20%
guaranteed value -10%
The motor adopts E-class insulation. When the altitude and ambient temperature meet the requirements of Article 4.2, the temperature rise limit of the motor stator winding (resistance 4.9
method) shall not exceed the requirements of Table 4.
temperature product level
temperature rise limit
Note: During the temperature rise test, the motor should be installed on the heat-screened bottom plate. If it is installed on an iron plate, the rubber protective device must be installed on the basket-type bottom seat. 4.10 When the motor reaches a stable hot state at rated frequency and rated voltage, it should be able to withstand an over-torque test of 1.5 times the rated torque for 10 minutes: at this time, the slip rate should be less than 15%. 4.11 The insulation resistance of the motor stator winding shall not be less than 20 in the cold state. M gate, in hot state or after temperature rise test, should not be less than 2. 0 M01. 4.12 The stator winding of the motor should be able to withstand a 1-minute withstand voltage test without breakdown. The frequency of the test voltage is 50 Hz, the waveform is a real sine wave, and the effective value of the voltage is 1760 V. When testing mass-produced motors, the test time is allowed to be shortened to 18, and the effective value of the test voltage is 2110V. The test voltage is applied during the test.
4.13 The inter-turn insulation test of the motor is an inter-turn insulation impulse withstand voltage test of the stator winding. The impulse test voltage (peak value) is 2200V. There should be no fault waveform during the test. It is also allowed to use a short-time increased voltage test instead. The test is carried out when the motor is no-load, and the external applied voltage is 130% of the rated voltage for min. When the voltage value is increased to 130% of the rated voltage , it is allowed to increase the speed at the same time, but it should not exceed 115% of its rated value, and no fault should occur after the test. 4.14 The motor should be able to withstand an increase in speed of 120% of its rated speed for 2 minutes without harmful deformation when it is no-load. 4.15 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.
JB/T3699
The effective value of the vibration speed measured when the motor is running at no-load with the clutch closed should comply with the provisions of Table 5. 4. 16
Vibration level
Vibration speed effective value
The noise excitation value of the A-weighted sound power level measured when the motor is running without load and the dielectric is closed shall not exceed the provisions of Table 6. 4.17
Motor power
Synchronous speed
Lu level
250550
4.18After the damp heat test of the motor, the insulation performance shall meet the following requirements: 1500
120~180
The insulation resistance of the motor winding to the casing and between the windings shall not be less than 0.38MQ after 6 cycles of alternating damp heat test, or shall not be less than 2MI after 2 cycles of constant sensible heat test; b. The insulation withstand voltage test of the motor winding to the casing and between the windings shall be able to withstand 85% of the test voltage specified in Article 4.12 of the standard for 1 min, no breakdown. 4.19 The motor runs at 1.06 times the rated voltage and no load. The leakage current of the motor in the hot state should not be greater than 0.5mA. 4.20 The time from the clutch and the inertia wheel to the time when the clutch shaft reaches 80% of the stable speed is the acceleration time, and the acceleration time should not be greater than 200ms.
4.21 The time from the clutch and the inertia wheel to the clutch shaft completely stopping is the braking time, and the braking time should not be greater than 250ms. The direction of the motor is counterclockwise (from the shaft extension end), and clockwise direction should be obtained as needed. 4. 22
After the durability test, the motor should meet the following requirements; 4. 23
The insulation resistance of the winding should not be less than 50% of the value specified in Article 4.11: the voltage resistance test of the stator winding should meet the requirements of GB5171 No. 8; the inter-turn insulation test of the stator winding should meet the requirements of Article 4. 13; c.
The motor's connection parts should not be loose, nor should there be any deformation or damage that endangers safety performance. The grounding device of the motor must comply with the provisions of CB12350. 4.24
The motor stator winding outlet and the wiring position of the terminal board (or socket) should be clearly marked. 4.25
The motor's electrical clearance shall not be less than 3.0 mm, and the creepage distance shall not be less than 4.mm. 4.26
If the user requires, the lighting power supply can be provided with a power supply voltage of 12V and a power of 15W or 20W. 4.27
Test method
5.1The electrical performance test items of the motor shall be carried out in accordance with GB1032. The motor noise test shall be carried out in accordance with GB10069.1. 5.2F
The motor vibration test shall be carried out in accordance with CB 10068.1. The measuring point is configured on the fuselage. 5.3#
Note: When performing the smell test and the grip test, the center height of the motor should be adjusted to the lowest. 5.4 The damp heat test of the motor shall be carried out in accordance with the provisions of GB12665. 5.5 The impulse withstand voltage test of the motor insulation shall be carried out in accordance with JB/Z 294, and the short-time rise voltage test shall be carried out in accordance with the provisions of GB 1032. 4
JB/T3699
5.6 The leakage current test of the motor shall be carried out in accordance with the provisions of GB12350. 5.7 Durability test
5.7.1 The motor shall work positively for 48 hours at rated load and 1.1 times rated voltage, and then work normally for 48 hours at rated load and 0.9 times rated voltage.
5..2 The motor shall start no-load for 50 times at 1.1 times rated voltage, and then start no-load for 50 times at 0.85 times rated voltage. The duration of each power-on start of the motor shall be at least equal to 10 times the time required to start to rated speed, but not less than 10%. After each start, there shall be a rest period to prevent overheating, which shall be at least equal to three times the continuous working time of the power-on start. 5.8 The inspection of the grounding device of the motor shall be carried out in accordance with the provisions of GB12350. 5.9 The marking of the motor shall be inspected in accordance with the provisions of GB12350. 5.10 The electrical clearance and creepage distance of the motor shall be inspected in accordance with the provisions of GB12350. 5.11 Test of acceleration and braking time.
5.11.1 Install the motor under test on the platform, install the inertia flywheel on the clutch shaft, the flywheel torque of the inertia flywheel is GD=0.003kg·m, the motor under test is concentrically connected with the tachometer generator, and the output signal of the tachometer generator is connected to the oscilloscope (or recorder), see Figure 2. Inertia wheel elastic pad coupling
Motor under test
Tachometer generator
Note: ① The test generator should use a DC tachometer generator with a base of 36" or below. ② The materials and dimensions of the inertia wheel, elastic pad and coupling are shown in Appendix A. Oscilloscope (or recorder)
5.11.2 Adjust the pressure of the pull rod so that when the pull force at the end of the pull rod reaches 20%.N, the clutch of the motor is in the critical state of initial disengagement from the brake.
Connect the power supply of the motor under test and let the motor run without load. 5.11.3 Rapidly apply a pull force of 35N at the end of the pull rod Lift it up, and after running for 2 seconds, quickly lower the lever. While operating the lever, use an oscilloscope (or recorder) to record the output voltage waveform of the tachometer generator. The readings of the acceleration time and braking time are shown in Figure 3. IN
5.11.4 After the first test, conduct the next test every 2 seconds or so. Repeat this test five times. Take the arithmetic mean of the five test results as the acceleration time and braking time of the motor. 5
6 Inspection rules
JB/T3699
6.1 Each product must pass the inspection before it can leave the factory, and it must be accompanied by a product inspection certificate. 6.2 Each motor must undergo factory inspection. The inspection items include: 6.2.1 Mechanical inspection
fish. Appearance inspection: The assembly of the motor should be complete and correct, the surface protective layer should be complete and even, without stains, damage, cracks, etc.: h. Rotation inspection: When the motor rotates, it should Smooth and brisk, without stagnation or stagnation, the sound is uniform and harmonious without harmful noise, and the direction of rotation should comply with the regulations:
center. Inspection of installation dimensions and external dimensions. 6.2.2 Determination of DC current of stator winding in actual cold state. 6.2.3 Determination of insulation resistance of stator winding to casing and between windings. 6.2.4 Voltage withstand test of stator assembly to casing. 6.2.5 Stator winding interturn impulse withstand voltage test, or short-time voltage increase test. 6.2.6 Determination of no-load current and loss (no-load characteristic curve needs to be measured during type test, and measured when the clutch is in braking state). 6.2.7 Determination of stall current and loss (measured in cold state). 6.3 During factory inspection, each product in and b of Article 6.2.1, Article 6.2.3, 6.2.4, 6.2.5, 6.2.6, and 6.2.7 of this chapter must be inspected. Other items are allowed to be sampled. The sampling method is determined by the manufacturer. Formulated, but must comply with the relevant requirements of GB2828. 6.4 Type inspection is required for any of the following situations: After the finalization of the model, the changes in the design, process and materials of the motor are sufficient to cause changes in certain performances during each trial production or small batch trial production of the manufacturer: h.
When the factory inspection results and the previous type inspection results have an unacceptable deviation: c.
The batch-produced motors are regularly tested, at least once a year. The type inspection items of the motor include:
All items of the factory inspection:
Determination of the locked-rotor torque
Determination of the maximum ripple,
Determination of efficiency and power factor
Determination of the temperature rise of the stator winding1
Overtorque test
Measurement of vibration speed;
Noise measurement +
Wet heat test
Overspeed test!
Determination of leakage current 1
Durability test!
Determination of clutch acceleration time and braking time Inspection of grounding device and mark;
Inspection of electrical clearance and creepage distance.
6. b Type inspection sampling adopts the secondary sampling plan in GB 2829, and the discrimination level DL=I. The sampling method of the sample is in accordance with the provisions of Article 4.9 of GB2829. Six prototypes are drawn and divided into two groups for testing. 6.7 Class A unqualified items
Class A unqualified items are withstand voltage test, grounding device and mark, leakage current, electrical clearance and creepage distance, insulation resistance, main items of nameplate (model, power, voltage, current and speed) and four items D, E, F, G in installation. Class A unqualified items must be all qualified.
6.8 Class B unqualified items include
temperature rise:
vibration:
noise,
mixed heat test:
JB/T3699
turn-to-turn insulation test or short-time voltage rise test, short-time over-torque test 1
overspeed test!
durability test
installation size Bi
power factor
locked-rotor torque,
locked-rotor current:
maximum speed,
no-load current measurement
acceleration time:
braking time. Www.bzxZ.net
Class B non-conforming quality level and judgment array shall be determined according to the provisions of Article 6.2.1.2 of JB/DQ3619 7 Marking, packaging, transportation, storage
7.1 Each motor must be firmly attached with a nameplate in a conspicuous position on the body. The nameplate material should contain the data on the nameplate, and the marking method should ensure that its traces are not easily erased during the entire use of the motor. 7.2 The items that should be marked on the motor plate are as follows: Manufacturer name +
Motor name:
Motor model:
Rated power;
Rated voltage
Rated current;
Rated frequency,
Rated speed;
Insulation grade
Manufacture year or production number +
Lighting power supply voltage, power
Connection coil.
When the nameplate must be reduced, one item may not be marked. The wiring diagram is allowed to be marked separately on the body. 7.3 The motor should be provided with an instruction manual (at least one copy is provided for a batch of motors of the same user and model) and a product certificate when leaving the factory.
7.4 Anti-rust and expansion measures should be taken for the motor shaft extension. The packaging of the motor should be firm and reliable and moisture-proof measures should be taken to avoid moisture and damage during transportation. 15
JB/T3699
5 The packaging box and marking of the motor should comply with the provisions of GB191. 7- 6
7 There is no restriction on the means of transportation of the motor, but the motor must be protected from damage, rain and chemical corrosion during transportation. 7.7
The motor should be stored in a clean, dry and well-ventilated warehouse with an ambient air temperature of -10 to 40℃. The air should not contain 7. 8
Corrosive gas·
JB/T3699
Appendix A
Material and size of inertia flywheel, coupling and elastic pad (supplement)
The coupling should comply with the requirements of Figure A1 and Table A1, and the material should be aluminum. AI
With speed measuring machine
The inertia flywheel should comply with the requirements of Figure A1 and Table A2, and the material should be steel. L2
15+ 1.u27
43The elastic pad should comply with the requirements of Figure A2.
For tachometer shaft
For clutch shaft
For clutch shaft
JB/T3699
Additional remarks:
This standard was proposed by the Small Power Motor Branch of the National Technical Committee for the Promotion of Rotating Electric Machine Standards. The standard is under the jurisdiction of the Guangzhou Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Guangzhou Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. The main authors of this standard are Tan Bicheng, Liu Ji and Xu Zhichao. 10
Shu Yingjia
JB/T3699
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