JB/T 7123-1993 Technical requirements for YCT series electromagnetic speed regulating motors (frame sizes 112 to 355)
Some standard content:
The standard of the People's Republic of China for the hydraulic press machinery industry is JB/T 71231993
112 (355)
1993-10-084
1994-01-01
YCT Technology
112 (355)
JB/T71231993
This standard specifies the type, basic parameters and dimensions, technical requirements, test methods, inspection rules, and marking and packaging requirements of the YCT series electromagnetic speed regulating motor (hereinafter referred to as the speed regulating motor). This standard is applicable to the speed regulating motors of the YCT series with frame numbers of 112 to 355. All series of speed regulating motors derived from this series of speed regulating motors can also be implemented as a reference.
2 Reference standards
GB755 Basic technical requirements for rotating electrical machines
Motor housing protection classification
GB 4942.1
GB 1993
Motor cooling method
Motor structure and installation type code
GB997E
Motor dimensions and tolerances
GB4772
Determination method and limit of noise of rotating electrical machines
GB10069
GB10068
Determination method and limit of vibration of rotating electrical machines
Test method of three-phase asynchronous motors
GB1032
JB/Z231
GB 191
Marking and inspection regulations for shape and position tolerances of main parts of small asynchronous motors Packaging, storage and transportation graphic symbols
5 Requirements for damp heat test of motors under general environmental conditions GB12665
ZBK22007Y series (IP44) three-phase asynchronous motor technical conditions (frame size 80~315) JB3085 Regulations for product packaging and transportation of electric drive control stations equipped with electronic devices 3 Types, basic parameters and dimensions
3.1 The speed regulating motor consists of an electromagnetic slip clutch (including a speed measuring generator, hereinafter referred to as the clutch), a traction motor, and an electromagnetic speed controller (hereinafter referred to as the controller). Its structural form is a combined structure in which the traction motor is directly installed on the clutch base by means of the flange end cover stop, and the installation type is IMB3 (see GB997). 3.2 The housing protection level of the speed regulating motor is IP21 (see GB4942.1). 3.3 The cooling method of the speed regulating motor is ICOI (see GB1993). 3.4 The speed regulating motor’s rating is a continuous rating based on the continuous duty system (S1). 3.5 The rated frequency of the speed regulating motor is 50Hz, the rated voltage of the traction motor is 380V, and the controller is 220V. 3.6 The traction motor of the speed regulating motor is a B5-type 4-pole Y-series blue-phase asynchronous motor with special requirements for installation dimensions. Its various electrical properties shall comply with the provisions of 2BK22007, or a special matching motor shall be used. 3.7 The tachometer generator used for the speed regulating motor shall be able to output the corresponding feedback voltage to the controller as the speed changes. When the speed is 1000r/min, its output voltage shall not be less than 20V and not more than 35V, and the insulation grade shall be Class B.
1993-10-08
1994-01-01
JB/T71231993
3.8 The speed regulating motor shall be able to adjust the speed continuously and smoothly within the rated voltage, rated frequency and rated speed regulating range, and its speed change rate shall not exceed 1.8% at level 1 and 2.5% at level 2.
The speed change rate is expressed by
Where: n10-
The speed regulating motor at any speed within the rated speed regulating range at 10% of the rated torque (under a given signal of the controller); The speed of the speed regulating motor at the rated torque (under the same given signal of the controller corresponding to n1); The rated maximum speed of the speed regulating motor at the rated torque. 3.9 The speed stabilization accuracy of the speed regulating motor shall not exceed 1%. The speed stabilization accuracy is expressed in %
nmxnerin ×100%
Nemax+nenin
Where: namax
nitmin
The maximum value among several speeds n is measured continuously at an interval of 10 minutes within the specified operating time; the minimum value among several speeds is measured continuously at an interval of 10 minutes within the specified operating time; the average speed within time 1 is 1s or 1.25s. The type, basic parameters and dimensions of the controller are shown in Appendix A, and can also be selected according to user requirements. The corresponding relationship between the frame number of the speed regulating motor and the nominal power, rated torque, and rated speed regulation range shall comply with the provisions of Table 1. Table 1 | | tt | t||225—4B
250—4A
250—4B
280—4A
315—4A| |tt||315—4B
355—4A
355—4B
355—4C
Nominal power
Rated torque
Rated speed range
1230~125
1250125
1320132
1340~440
1340~600
The frame number is represented by the center height and the number 4 after the center height and the letters AB and C. The number 4 and the letters AB and C represent the use of 4-pole traction motors with different powers at the same center height of
JB/T71231993
, so that it has different nominal powers. The nominal power of the speed regulating motor is expressed by the rated power of the traction motor. The output power of the speed regulating motor can be calculated by the following formula: Toxnax0.001
Where: P——output power, kw
T: output torque, N·m
nz——output speed, r/min.
Dimensions of speed regulating motor
3.12.1 The installation dimensions of the speed regulating motor shall comply with the provisions of Table 2, and the overall dimensions shall not be greater than those specified in Table 2. (3)
Frame size
Basic size
Basic size
Basic size
Basic size
Limit deviation
Basic size
+0.10), the rest is
Note+1) GE=DG, GE limit deviation, frame size 112 is 2》K hole position tolerance is based on the axis of the shaft extension. W
Root deviation
Basic size
Limit deviation
Position
Basic size limit deviationBasic size limit deviationBasic size limit deviationTolerance
Outline size
JB/T71231993bzxZ.net
The dimensions and tolerances of the shaft extension key of the speed regulating motor shall comply with the provisions of Table 3. Table 3
The radial circle runout tolerance at half of the shaft extension diameter
10-.000
shaft extension diameter shall comply with the provisions of Table 4. Length of speed-controlled motor shaft extension
Shaft extension diameter
Radial runout tolerance
11-Product.11
>30~50
>50~75
The tolerance of the parallelism of the axis of the speed-controlled motor to the foot support surface and the flatness tolerance of the foot support surface shall comply with the provisions of Table 5. 3.12.4
112~180
200~~250
315~355
Parallelism tolerance
3.12.5 The tolerance of the symmetry of the keyway on the shaft extension of the speed-controlled motor shall comply with the provisions of Table 6. Table 6
Technical requirements
Flatness tolerance
Speed-controlled motors shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. The speed regulating motor shall be able to operate at rated speed under the following environmental conditions. 4.2
There shall be little dust, no ferromagnetic dust, no gas that corrodes metal, damages insulation and is explosive. The altitude shall not exceed 1000m.
The maximum temperature of the ambient air shall vary with the operation, but shall not exceed 40℃. 4.2.4 The minimum temperature of the ambient air shall be -15℃ for the clutch and the traction motor, and -10℃ for the controller. 4.2.5
Relative humidity: For clutch and traction motor, the average maximum relative humidity in the most obvious month is 90%, and the average minimum temperature in the month is not higher than 25℃; for the controller, the maximum temperature is 40℃ and the relative humidity is not more than 50%. At lower temperatures, higher relative humidity is allowed, such as 90% when it is below 20℃.
JB/T71231993
4.2.6 Allowable vibration conditions at the controller installation: The maximum vibration acceleration does not exceed 5m/s2 when the vibration frequency range is 10-150Hz.
4.3 During the operation of the speed-adjusting motor, the deviation of the power supply voltage and frequency from the rated value is within the specified range of GB755, and the output torque shall still comply with the provisions of Table 1.
4.4 When the speed-adjusting motor is running under rated conditions, the temperature rise and allowable temperature limit of each assessment part shall comply with the provisions of Table 7. Table?
Clutch
Excitation winding
Insulation level
Measurement method
Resistance method
Point thermometer method or thermocouple
Measurement location
According to the highest
value of the test point specified in Article 5.11.
The temperature of the clutch armature shall not reach a value that may cause damage to itself or adjacent insulation or other materials under any circumstances. Note: When the altitude or ambient temperature of the test site is different from that specified in Article 4.2, the temperature rise and temperature limit shall be modified in accordance with the provisions of GB755. 4.5 When the speed regulating motor is in normal operation in hot state, the maximum value of its clutch excitation voltage shall not exceed 90V. 4.6 At rated voltage and rated frequency, after high-speed temperature rise test, the speed regulating motor shall be able to withstand an over-torque test of 1.6 times the rated torque for 15s without sudden speed change, stalling or harmful deformation. At this time, the speed is not tested, and the speed regulating motor can operate normally when it returns to the rated state.
4.7 The guaranteed value of the ratio of the stall torque to the rated torque of the speed regulating motor at rated voltage, rated frequency and cold state is 1.8 times, with a tolerance of -10%.
4.8 Under no-load conditions, the speed regulating motor should be able to withstand an increase in speed to 120% of its rated maximum speed for 2 minutes without harmful deformation.
4.9 The static residual torque value of the clutch part of the speed regulating motor should not be greater than 3% of the rated torque. 4.10 The insulation resistance of the excitation winding and the speed measuring generator winding of the clutch part of the speed regulating motor after the hot or temperature rise test should not be less than 0.25M2.
4.11 The excitation winding and tachogenerator winding of the clutch part of the speed regulating motor shall be able to withstand a withstand voltage test lasting 1 minute without breakdown. The test voltage frequency is 50Hz and is as sinusoidal as possible. The effective value of the voltage is 1500V for the excitation winding and 700V for the tachogenerator winding.
4.12 When the speed regulating motor is in the no-load state, at the speed that may produce the maximum vibration within the range of 600r/min to the rated maximum speed, the measured effective value of the vibration speed shall not be greater than that specified in Table 8. Table 8
Frame number
Effective value of gripping speed
112~132
160~225
250~355
4.13 When the speed-regulating motor is unloaded, within the rated speed regulation range, at the speed that produces the maximum noise, the noise value of the A-weighted sound power level measured should not exceed the provisions of Table 9, and the tolerance of the noise value is +3dB(A). Table 9
Power, W
Sound power level
4.14 After the clutch excitation winding and the stator winding of the speed-adjusting motor are tested for 6 cycles according to the 40℃ alternating damp heat test method specified in GB12665, the insulation resistance value of the clutch excitation winding and the stator winding of the speed-adjusting generator shall not be less than 0.25M2, and can withstand the voltage withstand test specified in Article 6
JB/T71231993
4.11 without breakdown, but the effective value of the test voltage is 1275V for the excitation winding and 600V for the speed-adjusting generator winding.
4.15 The technical requirements of the controller are shown in Appendix A. When the speed-adjusting motor is running, the bearings should be stable and light without stagnation. 4.16
4.17 The assembly is complete and correct, the surface paint is complete, there is no stain or damage, no cracks, etc. 5 Inspection rules and test methods
5.1 Speed-adjustable motors must pass inspection before leaving the factory, and should be accompanied by a product certificate. 5.2 Speed-adjustable motors should be inspected and tested, and the inspection items are as follows: a.
Mechanical inspection (according to the provisions of Article 5.6.5.7 of this standard); measurement of insulation resistance between the excitation winding and the tachogenerator winding and the housing (the cold insulation resistance can be measured during the inspection test, but the hot insulation resistance should be guaranteed not to be lower than the specified value in Article 4.10 of this standard); c.
Measurement of DC resistance value between the excitation winding and the tachogenerator winding in the actual cold state: the insulation resistance between the excitation winding and the tachogenerator winding and the housing; Insulation withstand voltage test (performed in accordance with Article 4.11 of this standard); d.
When the speed-adjustable motor is under no-load and the speed is 1000r/min, the output voltage of the tachometer generator shall not be less than 20V and not more than 35V; e.
The excitation voltage and excitation current of the speed-adjustable motor can be measured at the rated maximum speed and rated torque, or at the stalled state. At this time, the current of the drag motor should reach the rated value, and the measured excitation voltage and excitation current values should meet the requirements of the test specification: g. Inspection test of the controller.
5.3 Type test must be carried out in any of the following situations: a.
After identification and finalization, the manufacturer's first trial production or small-scale trial production; when the design or process changes of the speed-adjustable motor are sufficient to cause changes in certain performance and parameters; b.
When the results of the inspection test and the results of the previous type test have an unacceptable deviation; regular sampling of batch production, at least once every two years. 5.4 Type test items of speed regulating motor include: a.
All items of inspection test;
Determination of speed change rate;
Determination of steady speed accuracy;
Determination of open-loop mechanical characteristics (only when the structure is finalized): clutch temperature rise test (internal bearing temperature is only carried out when the structure is finalized): Determination of clutch stall torque;
Determination of clutch static residual torque,
Hot overspeed test;
Hot short-time overtorque test:
Determination of vibration;
Determination of noise;
Type test of controller.
5.5 When conducting type test, the withstand voltage test of clutch excitation winding and tachometer generator winding to the casing should be carried out after hot or temperature rise test, short-time overtorque test, overspeed test and winding insulation resistance measurement. 5.6 The mechanical inspection items of speed regulating motors include: rotation inspection, which shall comply with the provisions of Article 4.16; a.
Appearance inspection, which shall comply with the provisions of Article 4.17; b.
Installation dimension and tolerance inspection, which shall comply with the provisions of Articles 3.12.1 and 3.12.2; e.
The parallelism of the axis of the speed regulating motor to the foot support surface and the flatness of the foot support surface shall comply with the provisions of Article 3.12.4. d.
JB/T71231993
The radial runout inspection of the shaft extension of the speed regulating motor shall comply with the provisions of Article 3.12.3. The inspection of the symmetry of the keyway of the shaft shall comply with the provisions of Article 3.12.5. The flatness of the foot support surface and the symmetry of the keyway are allowed to be inspected on the parts. 5.7 During the inspection test, each motor a and b in Article 5.6 must be inspected; c and d can be inspected randomly, and the inspection method is determined by the manufacturer. 5.8 The number of specimens for the plastic test shall not be less than 2. If unqualified products are found during the test, the batch of speed-controlled motors must be inspected one by one. 5.9 Determination of speed change rate: When the speed-controlled motor is in a hot state after the temperature rise test at the rated maximum speed nmax and the rated minimum speed nmin, its mechanical characteristics are measured separately under closed-loop control. In the above two cases, the load torque is changed from the rated value to 10% of the rated value, and the corresponding speed value is recorded. At least three points are measured, and the corresponding two closed-loop mechanical characteristic curves n=f(T) are drawn. The speed change rate is checked to meet the requirements of Article 3.8 of this standard. 5.10 Determination of steady speed accuracy: After the speed regulating motor runs for 20 minutes at rated voltage, rated frequency, rated maximum speed and 50% rated output torque, the power supply voltage of its controller is changed from 198V to 242V (the power supply voltage and frequency of the motor remain rated at this time). Within 60 minutes, several values of nt are continuously measured every 10 minutes, and the maximum value numax and the minimum value nmin are taken. The steady speed accuracy 32 should be calculated in accordance with the provisions of Article 3.9 of this standard. 5.11 The temperature rise test shall be carried out under the conditions of rated voltage, rated frequency, rated output torque and closed-loop control, respectively, under the conditions of nmx and nmin. The measurement requirements and measurement results shall comply with the provisions of Article 4.4. 5.12 Determination of open-loop mechanical characteristics: In the hot state after the high-speed temperature rise test, the speed-torque characteristics of the clutch in the speed range from nmx to nain at different excitation currents shall be measured. With the excitation current at nx and rated torque as 100%, the speed-torque characteristics at 50%, 75%, 100% and 120% excitation currents shall be measured respectively, and the n=f(T) open-loop mechanical characteristic curve shall be drawn. 5.13 After the high-speed temperature rise test is completed, a hot short-term over-torque test shall be carried out. Under the closed-loop control of rated voltage, rated frequency and rated maximum speed, the load torque shall be gradually increased to 1.6 times the rated torque value for 15s, which shall comply with the provisions of Article 4.6 of this standard. 5.14 The test specified in h of Article 5.4 of this standard is as follows: After the hot short-term overtorque test, the overspeed test is carried out. When the speed regulating motor is running at no-load, the speed of the traction motor is increased, and the excitation current is gradually increased. When the output speed reaches 120% of the rated maximum speed, the operation lasts for 2 minutes. It should meet the requirements of Article 4.8 of this standard. 5.15 Determination of the stall torque of the speed regulating motor: The traction motor is at rated voltage and rated frequency, and the clutch is in the cold stall state. The excitation current is gradually increased with an adjustable DC power supply to make the stable value of the stall torque reach the provisions of Article 4.7 of this standard. At this time, the excitation voltage should not be greater than 90V
5.16 Determination of static residual torque: After the speed regulating motor is instantaneously strongly excited in the cold state (the excitation voltage is 90V), the clutch stall torque without excitation is measured, which should meet the requirements of Article 4.9 of this standard. 5.17 The inspections specified in cd of Article 5.6 of this standard shall be carried out in accordance with the provisions of GB4772 and JB/Z231. 5.18 Article 5.4 j of this standard shall be carried out in accordance with the provisions of GB10068, and the distribution of test points shall be as shown in Figure 1; Article 5.4 k shall be carried out in accordance with the provisions of GB10069.
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