This specification specifies the test method and test limit for the inter-turn insulation of the armature winding of a DC motor. This specification is applicable to the inter-turn insulation withstand voltage test of the armature winding of a DC motor with a rated voltage of 10 V or above. Other DC motors should also be used as a reference unless otherwise specified. This specification is not applicable to micro motors. JB/T 9617-1999 DC motor armature winding inter-turn insulation test specification JB/T9617-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T9617
1999-08-06
Wa Xian Ji Dong
2000-01-01
JB/T9617
This standard is a revision of ZB/TK23002-90 "DC armature cable group turn insulation test specification". This standard is consistent with ZB/T K23 002-90 In comparison, except for the modification of the writing format, the technical content remains unchanged. This standard replaces ZB/TK23002-90 from the date of implementation. This standard is proposed and coordinated by the National Technical Committee for Standardization of Rotating Electrical Machines. The responsible drafting unit of this standard: Shanghai Zhongji Factory. The main drafter of this standard: Li Shengzhi.
1 Scope
噬魁鹭瓦艺
This specification specifies the test method and test limit for the inter-turn insulation of the armature winding of a DC motor. JB/T96171999
ZB/TK2300290
This standard is applicable to the inter-turn insulation withstand voltage test of the armature winding of a DC motor with a rated voltage of 110V or more. Other DC Unless otherwise required, DC motors should also refer to this standard. This specification does not apply to micro motors.
2 Cited standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest version of the following standards. GBT755-1987 Rotating electrical machines: Basic technical requirements 3 Terminology
3.1 Span method
This is a method of impulse voltage test for the insulation between armature windings of DC motors. A span is taken on the armature commutator, and an impulse voltage test is applied between the first and last commutator segments. 3.2 Span method Method
A method of testing the insulation between turns of the armature winding of a DC motor by impulse voltage. The impulse voltage is applied to the two adjacent commutator segments of the armature commutator for testing. 4 Coil inspection test before going offline
Used to control the insulation quality of the turns of a single coil. 4.1 Test requirementswwW.bzxz.Net
4.1.1 The actual state of the coil in the core slot should be simulated, and the turns of the test coil should be tightened and placed on a rack with good insulation for testing.
4.1.2 For general intermediate machines with a rated voltage of 660V and below, if the insulation quality between turns has been stabilized and has formed batch production, single coils and average coils generally do not need to be tested for turn-to-turn withstand voltage before going offline. Inspection test, for large motors (armature outer diameter of 990mm and above), special purpose motors such as hoisting and metallurgy, and motors with rated voltage of 660V and above, single coil and equalizing line should be subjected to inter-turn medium voltage inspection test before going offline.
4.2 Test method and limit value
1999-08-06
2000-01-01
Different line single core market voltage withstand test JB/T96171999
After the manufacture of various molding lines and equalizing lines is completed and before going offline, the power frequency voltage or DC voltage should be used to carry out the voltage withstand test between different coil single cores. The test voltage is applied between two adjacent lines. The test voltage is in accordance with the following provisions:
For general purpose motors with rated voltage of 660V and below, the effective value of the power frequency test voltage shall not be less than 220V, and the DC test voltage shall not be less than 400V. For motors for special purposes such as metallurgy and motors with a rated voltage of more than 660V, the effective value of the power frequency test voltage should not be less than 530V, and the DC test voltage should not be less than 960Vs. The power frequency voltage or DC voltage test time is 1~3ss. 4.2.2 Inter-turn withstand voltage test for unit turns After the multi-function forming coil is completed, the impulse voltage should be used to conduct the same coil unit turn withstand voltage test before it is offline. The impulse voltage generated by the discharge of the capacitor is connected to the lead wires of the tested coil. The impulse voltage should be evenly distributed between the coils.
The peak value of the impulse voltage of each coil should not be less than 70V, and the number of impulses should not be less than 5 times. 5 Inter-turn insulation voltage level test
It is used to assess the stability of the insulation withstand voltage level. 5.1 Test requirements
5.1.1 For a medium-voltage coil and equalizing line with a certain insulation structure, (at least) 4 representative product coils should be randomly selected every quarter for the medium-voltage withstand test.
5.11 If the sample coils are found to have inter-turn short circuits during the test, double sampling should be conducted for re-testing. If the re-sampling is qualified, the whole batch is qualified. If there are inter-turn short circuits again, the batch of coils should be tested one by one. 5.2 Test methods and limits
The test methods and limits shall be in accordance with the provisions of 4.2.
6 Inspection test after coils are off the line
In order to assess the insulation quality of armature windings, 6.1 Test requirements
The test shall be conducted after the armature windings are off the line and before they are soaked. It can also be tested in accordance with the provisions of 6.2 and 6.3 at other stages of the armature winding manufacturing process as needed.
6.2 Test method
The impulse voltage generated by the discharge of the capacitor is directly applied to the inter-plate of the winding. During the test, the armature shaft should be grounded. The waveform comparison method can be used to determine the inter-plate short circuit. Compare the waveform of the tested winding with the normal waveform, and the waveform that is consistent is qualified. Other effective identification methods can also be used.
The test method should be selected according to the winding type. 6.2.1 Span
The number of commutator segments within the span should be determined according to the winding type and test equipment, so that the peak value of the segment impulse current meets the requirements of 6.3. Generally, 5 to 7 segments are recommended: The test voltage applied to the sample should be lower than 1.8 times the effective value of the factory power frequency test voltage to ground. In order to make each segment undergo a voltage test under the same conditions, it is recommended to test each segment one by one (the number of tests can be reduced according to the connection method of the voltage equalizing line). 6.2.2 Inter-segment method JB/T9617 Test a pair of adjacent commutator segments on the commutator in turn. During the test, if a high induced voltage is generated in the last test coil, a grounding device should be installed on the commutator segments on both sides of the tested commutator segment and ground them well. 6.3 Test limit For general-purpose motors with a rated voltage of 660V and below, the peak value of the inter-segment impulse voltage should not be less than 350V. For special-purpose motors such as metallurgy and motors with a rated voltage of more than 660V, the peak value of the inter-segment impulse voltage should not be less than Lower than 500V. The number of impacts should be no less than 5 times.
DC motor (inter-turn impulse withstand voltage test of armature winding) The motor should be subjected to the inter-turn impulse withstand voltage test according to the provisions of (GB755. According to the provisions of 6.2 and 6.3, it should be carried out on the armature winding before assembly. It is allowed to be carried out after the armature winding is hooped and before leaching. 3
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JB/T9617
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