JB/T 6741-1993 YSD series pole-changing double-speed three-phase asynchronous motor
Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T 6741-1993
YSD series pole-changing two-speed three-phase asynchronous motors 1993-08-21 Issued
Ministry of Machinery Industry of the People's Republic of China
1993-10-01 Implementation
Mechanical Industry Standard of the People's Republic of China
YSD series pole-changing two-speed three-phase asynchronous motors 1 Subject content and scope of application
JB/T 67411993
This standard specifies the form, basic parameters and dimensions, technical requirements, test methods and inspection rules, quality assurance period, and marking, packaging, transportation, and storage of YSD series pole-changing two-speed three-phase asynchronous motors. This standard applies to YSD series pole-changing two-speed three-phase asynchronous motors (hereinafter referred to as motors). 2 Reference standards
GB4831
GB1993
GB5171
GB12665
GB1032
GB10069
GB10068
GB12350
GB2828
JB/Z294
JB/DQ3619
GB2900.25
G B2900.27
Compilation method of motor product model
Motor housing protection classification
Motor cooling method
Cylindrical shaft extension
Motor structure and installation type code
Dimensions and tolerances of motors with flange numbers FF55 to FF1080 or FT55 to FT1080
Frame size 36 to 400
Basic technical requirements for rotating motors
General technical requirements for small power motors Item
Requirements for damp heat test of motors under normal environmental conditionsTest methods for three-phase asynchronous motors
Determination methods and limits of noise for rotating motors
Determination methods and limits of vibration for rotating motors
Safety requirements for small power motors
Batch inspection, counting, single sampling procedures and sampling tablesTest methods for inter-turn insulation of AC low-voltage motors with scattered windingsGeneral rules for quality classification of small power motors
Pictorial symbols for packaging, storage and transportation
Electrical terms Terminology
Electrical terminology
3 Type, basic parameters and dimensions
Small power motor
The motor housing protection level is IP44. 3.2 The cooling method of the motor is 1C0141. 3.3 The structure and installation type of the motor are IMB3, IMB34, IMBI4, IMB5, IMB35 (only for H90), and IMV5, IMV6, IMV18, IMV19, IMV1 and IMV3.
3.4 The motor rating is a continuous rating based on the continuous duty system (SI). 3.5 The rated frequency of the motor is 50Hz and the rated voltage is 380V. The stator winding of the motor is a single set of pole-changing winding with two speed connection methods and 6 output terminals. 3.6
Approved by the Ministry of Machinery Industry of the People's Republic of China on August 21, 1993 and implemented on October 1, 1993
JB/T67411993
The motor should be manufactured according to the rated power specified in Table 1, and the corresponding relationship between the frame number and the speed ratio power shall be as specified in Table 1. Table
1500/3000
100/150
150/200
210/280
300/430
480/600
700/850
1100/1400
1500/19 00
1000/1500
380/500
480/680| |tt||630/900
900/1300
750/1500
350/500
500/700
750/1000
300/400
400/550
Motor dimensions and tolerances
1The installation dimensions and tolerances of the motor shall comply with the provisions of Table 2 to Table 6, and the overall dimensions shall not be greater than those specified in Table 2 to Table 6. 3.8.1
P size is the maximum service value
when qualified
the motor base with induction, the motor without flange on the cover (IMB3 or IMV5, IMV6) cannot be reported to the production requirements of A/2
,
R is the higher
quality of the motor that can be used with the motor base without bottom, with small flange on the end, and the shaft extension at the flange end (IMB1 4 or IMV18, IMV19)R
The overall dimensions are not large. When the electric motor is not large, it can be A/2
for domestic use.. In the case of
R, it is more suitable for matching with the shaft parts. The motor (IMB14 or IMV18, IMV19) with the shaft extending at the flange end has no bottom, a small flange on the fine adjustment, and H
There are 11 pages left to read. Do you want to continue reading? This document was shared by bk0625 on 2020-04-09. Continue to read the full text for free. Users who have read this document have also read these documents. Don’t read them anymore. Download directly. The external dimensions are not large. Go to: 1) The P dimension is the maximum limit value, R is the higher value used for the green matching surface to the clean surface. The motors with large flanges on the ends are IMBS or IMV1, EMV3) and the machine has no bottom group, and the convex is good. The distance from the green mating surface to the output net south is basically ±6202+0?160220. The distance from the green mating surface to the output net south is in accordance with the provisions of Table 5. The motor with large flange on the cover (IMB5 or IMV1, IMV3) is basically ±885@1. The dimensions and tolerances of the motor shaft extension key shall comply with the provisions of Table 7. The radial runout tolerance of the shaft extension diameter at half of the shaft extension length shall comply with the provisions of Table 8. Table 8
Extension diameter D
>10~18
>18~30
Round runout tolerance
The radial round runout tolerance of the flange stop to the motor axis and the end face runout tolerance of the flange mating surface to the motor axis shall comply with the provisions of 3.8.2
in Table 9.
JB/T 67411993
The dimensions and tolerances of the motor shaft extension key shall comply with the provisions of Table 7. Table 7
Extension diameter D
The radial round runout tolerance at half the shaft extension length shall comply with the provisions of Table 8. Table 8
Shaft extension diameter D
>10~18
>18~30
Runout tolerance
The radial runout tolerance of the flange stop to the motor axis and the end face runout tolerance of the flange mating surface to the motor axis shall comply with the requirements of Table 9Table 9
Flange stop diameter N
The parallelism tolerance of the motor axis to the foot support surface is 0.4mm. The flatness tolerance of the motor foot support surface shall comply with the provisions of Table 10. Table 10
Maximum dimension of the height between the outer edges of the foot
>100~160
>160~180
The symmetry tolerance of the keyway on the motor shaft extension shall comply with the provisions of Table 11. 3.8.7
Keyway width F
4 Technical requirements
Circular runout tolerance
Surface tolerance
Symmetry tolerance
The motor shall comply with the requirements of this standard and be manufactured in accordance with the drawings and documents approved by the prescribed procedures. mm
JB/T6741-1993
4.2 The motor shall be able to operate at rated speed under the following altitudes, ambient air temperatures and ambient air relative humidity conditions. 4.2.1 The altitude shall not exceed 1000m.
4.2.2 The maximum ambient air temperature shall vary with the seasons but shall not exceed 40°C. Note,
If the motor is specified to be used at an altitude exceeding 1000m or the ambient air temperature is higher or lower than 40°C, it shall be in accordance with GB755 Section 5.3.The provisions of Article 4 are modified. The average maximum relative humidity of the wettest month is 90%, and the average minimum humidity of the month is not higher than 25℃. During the operation of the motor, the deviation of the power supply voltage and frequency from the rated value shall comply with the provisions of Article 4.3 of GB755. 4.3 When the power, voltage and frequency of the motor are rated, the guaranteed values of its efficiency and power factor shall comply with the provisions of Table 12. 4.4 1500/3000 1000/1500 74,5/72 Note: The efficiency is determined by direct measurement.
750/1500
750/1000
1500/30001000/1500
750/1500
0.65/0.82
0.68/0.84
0.69/0.84
0.72/ 0.85
0.74/0.85
0.67/0.78||t t||0.74/0.850.68/0.78
750/1000
0.76/0.87
0.69/0.790.62/0.860.60/0.72
0.76/0.870.70/0.790.63/0.870.60/0.73At rated voltage, the guaranteed value of the ratio of the motor's stall torque to the rated torque shall comply with the provisions of Table 13. 4.5
1500/3000
1000/1500
Torque/rated
750/1500
At rated voltage, the guaranteed value of the motor's minimum torque during starting is 0.8 times the rated torque. At rated voltage, the guaranteed value of the ratio of the maximum torque of the motor to the rated torque is 1.8 times. At rated voltage, the guaranteed value of the ratio of the motor's locked-rotor current to the rated current shall comply with the provisions of Table 14. 4.8
750/1000
JB/T6741-1993
1500-1000
Current/rated current
Locked-rotor current
Note: When calculating the ratio of locked-rotor current to rated current, the rated current value used shall be the guaranteed value of the rated power, rated voltage, efficiency and power factor (excluding tolerance), and the tolerance of the guaranteed value of the motor's electrical performance shall comply with the provisions of Table 15. Table 15
Electrical performance name
Efficiency n
Power factor co89
Stalling torque
Minimum torque
Maximum torque
Stalling current
0.15(1-n)Maximum-0.07
(1-c08)Maximum-0.07bzxZ.net
15% of guaranteed value
-15% of guaranteed value
10% of guaranteed value
+20% of guaranteed value
The motor adopts E-class or B-class insulation. When the altitude and ambient air temperature meet the requirements of Article 4.2, the temperature rise limit of the motor stator winding (electric roughness method) is 75K for E-class insulation and 80K for B-class insulation; the allowable temperature of the bearing (thermometer method) shall not exceed 95℃. If the altitude or ambient air temperature of the test site is different from that specified in Article 4.2, the temperature rise limit shall comply with Article 5.3.5 of GB755.
Note: The determination of the components and temperature rise during the temperature rise test shall comply with Articles 4.5 and 4.6 of CB5171. The motor shall be able to withstand an over-torque test of 1.5 times the rated torque for 15 seconds in a hot state and with gradually increasing torque, without any sudden change in speed, stalling or harmful deformation. At this time, the voltage and frequency shall be maintained at the rated value. 4.12 The motor shall be able to withstand an over-speed test of 1.2 times the rated speed for 2 minutes in a no-load state without any harmful deformation. 4.13 The insulation resistance of the motor stator winding shall not be less than 1MQ in a hot state or after a temperature rise test, or not less than 20Ma in an actual cold state.
4.14 When the motor is in a stationary state, the windings and the housing and the windings should be able to withstand a 1-minute withstand voltage test without breakdown of the insulation. The frequency of the test voltage is 50Hz, the waveform is as close to a sine wave as possible, and the effective value of the voltage is 1760V. When a large number of motors are continuously produced for inspection and testing, the time is allowed to be shortened to 1s, and the effective value of the test voltage is 2110V. The test voltage is applied by a test rod. Note: The same motor should not be repeatedly subjected to a withstand voltage test. If necessary, it is allowed to be subjected to another withstand voltage test, and the test voltage should not exceed 1400V. 4.15 The stator winding of the motor should be able to withstand a turn-to-turn withstand voltage test without breakdown. The test impulse voltage (peak value) is 2200V; it is also allowed to be replaced by a high voltage test. The test is carried out when the motor is unloaded, the external applied voltage is 130% of the rated voltage, and the time is 3min. When the voltage value is increased to 130% of the rated voltage, the frequency is allowed to be increased at the same time, but it should not exceed 115% of its rated value. 4.16 After the damp heat test of the motor, the insulation performance shall meet the following requirements: .
The insulation resistance of the motor winding to the housing and between the windings shall not be less than 0.38M after 6 cycles of the alternating damp heat test; or it shall not be less than 1.0M after 2 adjustments of the constant damp heat test. b. The insulation withstand voltage test of the motor winding to the housing and between the windings shall be able to withstand the 35% test voltage specified in Article 4.14 of this standard for 1 minute without breakdown. 4.17
The effective value of the dynamic speed measured when the motor is unloaded shall not exceed 1.8mm/s.2, the temperature rise limit of the motor stator winding (electric roughness method) is 75K for E-class insulation and 80K for B-class insulation; the allowable temperature of the bearing (thermometer method) should not exceed 95℃. If the altitude or ambient air temperature of the test site is different from the provisions of Article 4.2, the temperature rise limit should be in accordance with Article 5.3.5 of GB755.
Note: The determination of the components and temperature rise during the temperature rise test shall be in accordance with Articles 4.5 and 4.6 of CB5171. The motor should be able to withstand an over-torque test of 1.5 times the rated torque for 15s in a hot state and with gradually increasing torque, without sudden speed changes, stalling or harmful deformation. At this time, the voltage and frequency should be maintained at the rated value. 4.12 The motor should be able to withstand an over-speed test of 1.2 times the rated speed for 2min under no-load conditions without harmful deformation. 4.13 The insulation resistance of the motor stator winding in hot state or after temperature rise test shall not be less than 1MQ or in actual cold state shall not be less than 20Ma.
4.14 When the motor is stationary, the winding and the casing and the windings shall be able to withstand a 1-minute withstand voltage test without insulation breakdown. The frequency of the test voltage is 50Hz, the waveform is as close to a sine wave as possible, and the effective value of the voltage is 1760V. When a large number of continuously produced motors are inspected and tested, the time is allowed to be shortened to 1s, and the effective value of the test voltage is 2110V. The test voltage is applied with a test rod. Note: The same motor should not be repeatedly subjected to withstand voltage test. If necessary, it is allowed to conduct another withstand voltage test. The test voltage should not exceed 1400V. 4.15 The stator winding of the motor shall be able to withstand the inter-turn withstand voltage test without breakdown. The test impulse voltage (peak value) is 2200V; it is also allowed to be replaced by a high voltage test. The test is carried out when the motor is unloaded, and the external voltage is 130% of the rated voltage for 3 minutes. When the voltage value is increased to 130% of the rated voltage, the frequency is allowed to be increased at the same time, but it should not exceed 115% of its rated value. 4.16 After the damp heat test of the motor, the insulation performance shall meet the following requirements:.
The insulation resistance of the motor winding to the housing and between the windings shall not be less than 0.38M after 6 cycles of the alternating damp heat test; or it shall not be less than 1.0M after 2 adjustments of the constant damp heat test. b. The insulation withstand voltage test of the motor winding to the housing and between the windings shall be able to withstand the 35% test voltage specified in Article 4.14 of this standard for 1 minute without breakdown. 4.17
The effective value of the dynamic speed measured when the motor is no-load should not exceed 1.8mm/s.2, the temperature rise limit of the motor stator winding (electric roughness method) is 75K for E-class insulation and 80K for B-class insulation; the allowable temperature of the bearing (thermometer method) should not exceed 95℃. If the altitude or ambient air temperature of the test site is different from the provisions of Article 4.2, the temperature rise limit should be in accordance with Article 5.3.5 of GB755.
Note: The determination of the components and temperature rise during the temperature rise test shall be in accordance with Articles 4.5 and 4.6 of CB5171. The motor should be able to withstand an over-torque test of 1.5 times the rated torque for 15s in a hot state and with gradually increasing torque, without sudden speed changes, stalling or harmful deformation. At this time, the voltage and frequency should be maintained at the rated value. 4.12 The motor should be able to withstand an over-speed test of 1.2 times the rated speed for 2min under no-load conditions without harmful deformation. 4.13 The insulation resistance of the motor stator winding in hot state or after temperature rise test shall not be less than 1MQ or in actual cold state shall not be less than 20Ma.
4.14 When the motor is stationary, the winding and the casing and the windings shall be able to withstand a 1-minute withstand voltage test without insulation breakdown. The frequency of the test voltage is 50Hz, the waveform is as close to a sine wave as possible, and the effective value of the voltage is 1760V. When a large number of continuously produced motors are inspected and tested, the time is allowed to be shortened to 1s, and the effective value of the test voltage is 2110V. The test voltage is applied with a test rod. Note: The same motor should not be repeatedly subjected to withstand voltage test. If necessary, it is allowed to conduct another withstand voltage test. The test voltage should not exceed 1400V. 4.15 The stator winding of the motor shall be able to withstand the inter-turn withstand voltage test without breakdown. The test impulse voltage (peak value) is 2200V; it is also allowed to be replaced by a high voltage test. The test is carried out when the motor is unloaded, and the external voltage is 130% of the rated voltage for 3 minutes. When the voltage value is increased to 130% of the rated voltage, the frequency is allowed to be increased at the same time, but it should not exceed 115% of its rated value. 4.16 After the damp heat test of the motor, the insulation performance shall meet the following requirements:.
The insulation resistance of the motor winding to the housing and between the windings shall not be less than 0.38M after 6 cycles of the alternating damp heat test; or it shall not be less than 1.0M after 2 adjustments of the constant damp heat test. b. The insulation withstand voltage test of the motor winding to the housing and between the windings shall be able to withstand the 35% test voltage specified in Article 4.14 of this standard for 1 minute without breakdown. 4.17
The effective value of the dynamic speed measured when the motor is no-load should not exceed 1.8mm/s.
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