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A method and device for determining a fast discharge fault of a motor

A determination method and fault technology, applied in the field of motor fast discharge fault determination, can solve problems such as fast discharge failure, personnel and equipment damage, etc.

Active Publication Date: 2020-09-08
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the fast discharge process of the motor, if a fast discharge failure occurs and the fast discharge fails, the high voltage of the motor may cause harm to personnel and equipment

Method used

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  • A method and device for determining a fast discharge fault of a motor
  • A method and device for determining a fast discharge fault of a motor
  • A method and device for determining a fast discharge fault of a motor

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Embodiment Construction

[0049] The core of the present invention is to provide a motor fast discharge fault determination method, through the motor controller to detect the bus voltage of the motor controller, it can determine whether there is a fault in the motor fast discharge process, ensuring the safety of the motor fast discharge process .

[0050] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. 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.

[0051] Please refer to figure 1 , is a schematic diagram of the fast discharge circuit...

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PUM

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Abstract

The invention discloses a motor rapid discharging fault determination method which is applied to a motor controller. The method comprises receiving a motor rapid discharging instruction; starting a fast discharging process according to the motor rapid discharging instruction; when the execution duration of the rapid discharging process reaches a preset duration threshold value, determining whetherthe bus voltage of the motor controller is lower than a preset safety voltage threshold value or not, if not, determining that a fault exists in the motor rapid discharging process. According to thetechnical scheme provided by the invention, the bus voltage of the motor controller is detected through the motor controller, whether a fault occurs in the motor rapid discharging process can be determined, and the safety of the motor rapid discharging process is guaranteed. The invention further discloses a motor rapid discharging fault determination device, which has the corresponding technicaleffects.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method and device for determining a fast discharge fault of a motor. Background technique [0002] With the continuous advancement of technology, new energy vehicles have gradually emerged and made great progress, such as hybrid vehicles that use traditional fuels and are equipped with motors to improve low-speed power output and fuel consumption, pure electric vehicles driven by electricity, and fuel Battery vehicles are all representatives of new energy vehicles that have achieved large-scale promotion and application. [0003] Since most new energy vehicles are driven by electricity, the voltage of the motor is usually several hundred volts in the working state. When the motor enters the non-working state from the working state, high-voltage fast discharge is required. [0004] During the high-voltage fast discharge process of the motor, the motor enters the fast disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34
CPCG01R31/382
Inventor 朱小丰谭小川周洪波
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD