Motor disconnection detection method, system and device

A detection method and detection system technology, applied in the direction of measurement device, measurement of electricity, continuity test, etc., can solve problems such as affecting the service life of the motor, increasing the current, and heating the motor.

Active Publication Date: 2020-07-07
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of detecting whether the motor is disconnected is to detect whether the motor is disconnected by detecting the negative sequence component in the output current of the traction converter. Two-phase or three-phase disconnection of the motor occurs. Since the three-phase load of the traction converter is still symmetrical after the motor

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  • Motor disconnection detection method, system and device
  • Motor disconnection detection method, system and device
  • Motor disconnection detection method, system and device

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Embodiment Construction

[0059] The core of the present invention is to provide a motor disconnection detection method, system, device and computer-readable storage medium, which can effectively detect whether the motor is disconnected, improve the reliability of motor disconnection detection, and avoid the occurrence of severe heating of the motor. Increase motor life.

[0060] 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 inventi...

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Abstract

The invention discloses a motor disconnection detection method, which is applied to frame control or vehicle control and comprises the following steps: acquiring output voltage, output current and rotating speed of a converter; calculating a first flux linkage through a voltage model according to the output voltage and the output current; according to the output current and the rotating speed, calculating through a current model to obtain a second flux linkage; judging whether the first flux linkage is consistent with the second flux linkage or not; and if not, judging that motor disconnectionoccurs. The detection method can effectively detect whether motor disconnection occurs or not, improves the reliability of motor disconnection detection, avoids the severe heating condition of the motor, and prolongs the service life of the motor. The invention also discloses a motor disconnection detection system and device, and a computer readable storage medium, which all have the above beneficial effects.

Description

technical field [0001] The present invention relates to the technical field of inverter fault diagnosis, in particular to a detection method for motor disconnection; it also relates to a detection system, device and computer-readable storage medium for motor disconnection. Background technique [0002] In the field of rail transit, a traction converter may drive two motors on the same bogie at the same time, that is, the rack control, or drive four motors on the same vehicle at the same time, that is, the vehicle control. At present, the method of detecting whether the motor is disconnected is to detect whether the motor is disconnected by detecting the negative sequence component in the output current of the traction converter. Two-phase or three-phase disconnection of the motor occurs. Since the three-phase load of the traction converter is still symmetrical after the motor is disconnected, it is impossible to effectively detect the disconnection of the motor through the a...

Claims

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Application Information

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IPC IPC(8): G01R31/54G01R31/56
Inventor 侯招文徐绍龙甘韦韦郭维王文韬陈科肖振豪
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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