Motor protection device and method

A technology of motor protection and resistance, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of unable to protect the vehicle power system, affecting the driving experience, and unable to reduce the torque in a timely and effective manner

Pending Publication Date: 2022-01-07
WEICHAI POWER CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present application provides a motor protection device and method to overcome the problems in the prior art that the torqu

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  • Motor protection device and method
  • Motor protection device and method

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Embodiment Construction

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

[0043] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodime...

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Abstract

The embodiment of the invention provides a motor protection device and method. The device comprises a controller, a driver, a three-phase bridge rectifier circuit, a bus capacitor, three switching circuits and three first resistors; the controller is used for sending a control signal to the driver and controlling the on-off state of each branch in the three-phase bridge rectifier circuit and/or the switching circuits; the driver is used for applying voltage to the grid electrode of a first IGBT and/or the grid electrode of a second IGBT through the received control signal, providing driving current and controlling the on-off state of the first IGBT and/or the second IGBT; the three-phase bridge rectifier circuit is used for quickly discharging the bus capacitor and supporting the operation of an active short circuit; and the switching circuits are used for switching to a preset branch according to the received control signal of the controller so as to protect a motor. In the prior art, torque cannot be effectively reduced in time, as a result, a vehicle power system cannot be protected, and the driving experience is affected. Withthe motor protection device adopted, the above defects can beovercome.

Description

technical field [0001] The embodiments of the present application relate to the technical field of motor protection, and in particular, to a motor protection device and method. Background technique [0002] In order to ensure personal safety, the vehicle must have an active discharge function. The current active discharge technology mainly discharges through the motor windings. Among them, the discharge time is fast through the motor windings, but it will bring unexpected torque and affect the driving experience. [0003] Secondly, when the vehicle breaks down and suddenly cannot drive, it will seriously affect the controller and motor, resulting in a large torque impact, which in turn will affect the driving experience and the vehicle power system. [0004] Therefore, under the above working conditions, the prior art cannot effectively reduce the torque in a timely manner, thereby failing to protect the vehicle power system and affecting the driving experience. Contents ...

Claims

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Application Information

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IPC IPC(8): H02H7/08
CPCH02H7/0838H02H7/0844
Inventor 徐亚美苗强刘丹丹胡刚毅李强
Owner WEICHAI POWER CO LTD
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