Motor controller over-current protection device, motor controller and electric car

A motor controller and overcurrent protection technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of inconsistent current and low judgment accuracy of the motor controller, and achieve the effect of increasing the judgment accuracy

Active Publication Date: 2017-06-30
重庆长安新能源汽车科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a motor controller overcurrent protection device, a motor controller and an electric vehicle to solve the current motor controller current obtained a

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  • Motor controller over-current protection device, motor controller and electric car
  • Motor controller over-current protection device, motor controller and electric car
  • Motor controller over-current protection device, motor controller and electric car

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0045] The embodiment of the present application provides an overcurrent protection device for a motor controller, such as figure 1As shown, it is applied to a motor controller, the motor controller includes a control system and a drive circuit, and the motor controller overcurrent protection device includes:

[0046] A current sensing module 100, configured to collect two-phase current signals output by the motor controller;

[0047] A current conversion mod...

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Abstract

The application discloses a motor controller over-current protection device, a motor controller and an electric car. The motor controller over-current protection device actually collects a two-phase current signal output by a motor controller through a current sensing module, converts the two-phase current signal into a voltage signal which can be measured by an operational amplifier through a current conversion module, and compares the voltage signal with an upper threshold voltage and a lower threshold voltage to judge whether there is an over-current phenomenon. As the voltage signal is directly collected by the current sensing module, the voltage signal represents the actual current value of the motor controller, the situation in which the current value represented by the voltage signal is inconsistent with the actual current of the motor controller is avoided, and the accuracy of judgment on whether there is an over-current phenomenon in the motor controller is increased. Further, the motor controller over-current protection device realizes bilateral detection of the voltage signal, and over-current detection by the motor controller over-current protection device is more comprehensive.

Description

technical field [0001] The present application relates to the technical field of overcurrent protection, and more specifically, relates to an overcurrent protection device for a motor controller, a motor controller and an electric vehicle. Background technique [0002] Electric vehicles refer to motor vehicles that use power batteries as all or part of their power sources, including pure electric vehicles and hybrid vehicles. Electric vehicles have become the current solution for energy, Environmental issues are the first choice, which also makes the demand for electric vehicles more and more large, becoming one of the future development directions of the automobile industry. [0003] Current mainstream electric vehicles generally use permanent magnet synchronous motors as drive motors, and the rotation of the motors is controlled by a motor controller. During the running of the electric vehicle, when an overcurrent or short circuit fault occurs in the motor controller due ...

Claims

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Application Information

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IPC IPC(8): H02H7/08
CPCH02H7/0838
Inventor 贾俊玲周安健朱天宇周洪波郑碧红
Owner 重庆长安新能源汽车科技有限公司
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