Test Method for Loss of Double-Branch AC Permanent Magnet Motor

A technology of permanent magnet motor and testing method, which is applied in the direction of motor generator testing, dielectric performance measurement, electrical measurement, etc., to achieve stable performance, simple structure, and avoid calculation and adjustment of instrument parameters

Active Publication Date: 2021-11-19
HARBIN ENG UNIV
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Problems solved by technology

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a method for testing the loss of a double-branch AC permanent magnet motor that can test the loss of the motor without a mechanical load device or without a mechanical load device

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  • Test Method for Loss of Double-Branch AC Permanent Magnet Motor
  • Test Method for Loss of Double-Branch AC Permanent Magnet Motor
  • Test Method for Loss of Double-Branch AC Permanent Magnet Motor

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Embodiment Construction

[0034] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited to this. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the technical solution of the present invention. in the scope of protection.

[0035]The AC permanent magnet motor described in the present invention is a double-branch permanent magnet synchronous motor, and its stator winding has two sets of windings in the same slot. The structural diagram of the motor is as follows figure 1 shown. A1, B1, and C1 are the three-phase windings of the #1 branch, and A2, B2, and C2 are the three-phase windings of the #2 branch. 1 is the motor stator, 2 is the permanent magnet, and 3 is the motor rotor.

[0036] The non-mechanical load testing method of the double-branch perm...

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Abstract

The invention discloses a method for testing the loss of a double-branch AC permanent magnet motor, which comprises the steps of connecting an adjustable resistance-inductive load to a power generation branch, and connecting a motor control driver to an electric branch; controlling the operation of the driver, the load is purely resistive, and testing the rotational speed of the motor , Electric branch current waveform and phase voltage value, power generation branch current waveform and phase voltage value and power factor angle; the motor stops running, disconnect the generator unit load, and calculate the winding resistance; test the motor AC and direct axis inductance; test the motor empty Carry back EMF and solve to obtain the total magnetic flux Φ of each pole of the permanent magnet 0 ; Run the motor again to get the iron loss of the motor. Compared with the direct test method of loss, the present invention does not need an external mechanical load device, which saves test cost. Compared with the indirect test method of loss, this method does not need to use iron loss tester, avoids complicated calculation and adjustment of instrument parameters, and considers the influence of rolling process on loss test.

Description

technical field [0001] The invention relates to a method for testing the loss of a double-branch AC permanent magnet motor, which belongs to the technical field of motor testing. Background technique [0002] At present, the test methods for the core loss of permanent magnet synchronous motors can be divided into two types: direct test method and indirect test method. [0003] The general direct test method is to use the prime mover and the tested motor to drag, and use the tests under different loads to calculate the core loss of the motor. In the process of using the direct test method to test the loss characteristics of the motor, not only an external load device is required, which increases the complexity of the test; and due to the existence of the load, the energy consumption of the test system is also relatively high during the test process of loss and temperature rise. big. [0004] The general indirect test method is to use external equipment to test the loss of e...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34G01R27/26
CPCG01R27/2694G01R31/343
Inventor 曾德鹏
Owner HARBIN ENG UNIV
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