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Test method and system for stalling of permanent magnet motor

A technology of permanent magnet motors and testing methods, applied in the field of motors, can solve problems such as difficult measurement and measurement

Active Publication Date: 2014-01-22
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for permanent magnet motors, since there are three-phase current vectors in permanent magnet motors (the angle between any two phases is 120°), the three-phase current vectors are different when the locked rotor position is different, and the temperature rise of the locked rotor will vary with It is difficult to measure and measure uniformly due to the change of the locked rotor position

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  • Test method and system for stalling of permanent magnet motor
  • Test method and system for stalling of permanent magnet motor
  • Test method and system for stalling of permanent magnet motor

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] In the present invention, the locked-rotor test of the permanent magnet motor is carried out at the limit locked-rotor position. The so-called limit locked-rotor position means that any phase in the three-phase current vector reaches the maximum magnitude, that is, the locked-rotor position where a certain phase reaches the limit curre...

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Abstract

The embodiment of the invention provides a test method and system for stalling of a permanent magnet motor. The method comprises the following steps of determining the space current vector at a stalling position; selecting a limit phase; calculating the compensation angle between the space current vector at the stalling position and the limit phase; correcting the space current vector according to the compensation angle to coincide the space current vector with the limit phase, wherein the current vector of the limit phase is equal to the limit current vector; increasing the temperature of stalling of the permanent magnet motor when the current vector of the limit phase is equal to the limit current vector.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a method and system for testing a locked-rotor of a permanent magnet electric motor. Background technique [0002] The stalling of the motor refers to the fault condition that the motor still outputs torque when the rotor speed is 0 revolutions. The power factor is extremely low when the rotor is locked, so the current inside the motor can rise to several times the rated current, which can burn the motor in a short time. Therefore, the stall test is an important item in the general test of the motor. [0003] The content of the stall test is to test the temperature rise law of the motor in the case of stall. However, for permanent magnet motors, since there are three-phase current vectors in permanent magnet motors (the angle between any two phases is 120°), the three-phase current vectors are different when the locked rotor position is different, and the temperature ri...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
Inventor 陈建明石高峰王征宇陈慧民元约平
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST