A method for judging the polarity of motor windings
A motor and winding technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of low detection efficiency and cumbersome operation.
Active Publication Date: 2016-08-17
CHINA FIRST METALLURGICAL GROUP
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a simple and practical method for judging the polarity of motor windings in view of the problems of cumbersome operation and low detection efficiency when judging the polarity of motor windings in the prior art. Voltage regulation method, through the detection of the ammeter and detection switch, and display the result through the indicator light
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[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0037] refer to figure 1 As shown, the method for discriminating the polarity of the motor winding in the embodiment of the present invention includes the following steps:
[0038] (1) In the phase A winding of the motor (corresponding to figure 2 The two ends of U and U′ phases) are connected to the test circuit output interface, and the test circuit output interface is externally connected to the test circuit 10. At the same time, the B phase winding of the motor (corresponding to figure 2 Middle V, V′ phase), C phase winding (corresponding to figure 2 The two ends of phases W and W′ in the center are respectively connected to the I detection loop interface and the II detection loop interface, and the I detection loop interface and the II detection loop interface are respectively externally connected to the I detection loop 20 and the II detect...
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A method for distinguishing motor winding polarity comprises the following steps that during detecting, direct current with a certain voltage level is exerted on a phase winding of a motor through a testing loop during testing; through ampere meters connected with other two phase windings of the motor in a testing loop, the sensing current direction sensed by the other two phase windings is tested; when the ampere meters are used for testing sensing current, pointers can deflect in a certain direction, testing switches are arranged in the forward direction and the backward direction in the inner portions of the ampere meters, the ampere meter pointers deflect and collide with electric pieces of the testing switches, the testing switches are closed, the testing loop is connected, and an indicating lamp in the loop is turned on; and finally according to the color of the indicating lamp which is turned on, the winding polarity of the motor is judged. According to the method, different degrees of testing voltages can be selected, the testing range is wide, the testing results are visually reflected through the lighted lamp color, the phenomena that polarity is mistakenly judged are reduced, only one person needs to operate the two testing loops, polarity testing of the three phase windings of the motor can be completed at the same time in one-time testing, the principle is simple, and testing efficiency is high.
Description
technical field [0001] The invention relates to the construction field of electrical installation engineering of a power system, in particular to a method for judging the polarity of a motor winding. Background technique [0002] The national standard GB50150-2006 "Electrical Equipment Handover Test Standard" stipulates in the test items of AC motors in Article 6.0.10 that when debugging and constructing AC motors, the polarity of the stator winding and the correctness of its connection should be checked. When the debugger debugs the AC motor, in some cases, the identification of the stator winding of the motor is unclear, and the six-terminal terminal cannot be clearly identified. At this time, it is necessary to check the polarity of the stator winding. The wrong wiring method will easily cause unbalanced three-phase current and overheating of the winding. The beginning and end of the stator winding must be distinguished. [0003] The existing methods for judging the pol...
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IPC IPC(8): G01R31/06
Inventor 李锐李德家郑运洪季华锋罗威姚艳霞彭绪辉
Owner CHINA FIRST METALLURGICAL GROUP