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Discharge control circuit and active discharge circuit of capacitor in motor controller

A motor controller, discharge control technology, applied in the control of drive, motor, electric vehicle, etc., can solve problems such as threats to personal safety, achieve rapid active discharge, and prevent false triggering.

Active Publication Date: 2020-01-24
GREAT WALL MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is a great test for the reliability of the active discharge resistor and will threaten personal safety

Method used

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  • Discharge control circuit and active discharge circuit of capacitor in motor controller
  • Discharge control circuit and active discharge circuit of capacitor in motor controller

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Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0027] The "connection" involved in the embodiments of the present invention mainly refers to "electrical connection", which is used to describe the signal connection between two components, such as through a circuit connection, and the "connection" involved may be between two components The direct electrical connection can also be the indirect electrical connection through other components.

[0028] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0029] figure 1 is a schematic structural diagram of a capacitor discharge control circuit in a motor controller according to an embodiment of the present invention, wherein the capacitor in the motor controller refers to its busbar capacitance. Such as figure 1 As shown, the discharge con...

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Abstract

The invention relates to the technical field of electric cars, and provides a discharge control circuit and an active discharge circuit of a capacitor in a motor controller. The discharge control circuit comprises the capacitor C1, a triode Q1 and an optical coupler U1, wherein one end of the capacitor C1 receives an active discharge signal which is transmitted by the motor controller in the formof square waves, and the other end of the capacitor C1 is connected to a base electrode of the triode Q1; an emitter electrode of the triode Q1 is grounded, and a collector electrode of the triode Q1is connected to the input end of the optical coupler U1; and the output end of the optical coupler U1 is connected to a control end of an active discharge loop of the capacitor in the motor controller. According to the embodiment of the invention, the capacitor C1 is matched with the triode Q1, so that the active discharge signal is transmitted through a capacitor charge and discharge process, andtherefore, control on bus capacitor active discharge is realized by controlling the triode to connect the optical coupler, and active discharge for the bus capacitor can be quickly performed; and meanwhile, false triggering of the discharge control circuit is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a capacitor discharge control circuit and an active discharge circuit in a motor controller. Background technique [0002] As an emerging industry strongly supported by my country, new energy vehicles are being intensively researched and developed by major automakers and component manufacturers. The development of new energy vehicles can internally improve the quality of life of the people and alleviate energy and environmental pollution problems; externally, it can demonstrate my country's advanced technological level to the world, thereby improving its international status. Most new energy vehicles use high-voltage batteries as power or auxiliary power to drive, and the voltage of high-voltage batteries can reach 300V or even higher. Due to the existence of the bus capacitor of the motor controller, after the high-voltage battery is disconnected, the bus capacitor of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L15/20
CPCB60L3/00B60L15/20Y02T10/72
Inventor 王平杨小龙
Owner GREAT WALL MOTOR CO LTD
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