Pre-charging control method for vehicle motor controller

A motor controller and control method technology, applied in current collectors, battery circuit devices, electric vehicles, etc., can solve the problems of inaccurate judgment, low controller safety, low efficiency, etc., to achieve flexible configuration, simple and reliable system, The effect of fewer control points
CN102386655AActive Publication Date: 2012-03-21ZHENGZHOU YUTONG BUS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHENGZHOU YUTONG BUS CO LTD
Publication Date
2012-03-21

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Abstract

The invention relates to a pre-charging control method for a vehicle motor controller. Measured values obtained before and after the starting of pre-charging are compared to judge whether the pre-charging is started or not, and measured values obtained after the starting of the pre-charging and the finishing of the pre-charging are compared to judge whether the pre-charging is finished or not. By the method provided by the invention, a way of acquiring and judging the direct current bus voltage of a pre-charging circuit is improved independent of a complex detection circuit based on a conventional detection circuit to realize accurate judgment in the starting and finishing of the pre-charging, so the method is high in practicability and flexible in configuration, and the security and reliability of the motor controller and the whole electric vehicle with new energy are improved. The motor controller adopting the method has high accuracy, fewer control points and fault points, a simple and reliable system and high reliability; and the motor controller finishes pre-charging control, and a diagnostic function is added at the same time.
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Description

technical field

[0001] The invention relates to a pre-charging control method for a vehicle motor controller. Background technique

[0002] The vehicle motor controller is one of the core components of new energy electric vehicles. It is a key component that converts the DC power of energy storage devices such as vehicle power batteries or supercapacitors into three-phase AC power for driving motors. Such as figure 1 As shown, the vehicle motor controller is the inverter part in the figure, and its DC side has a large-capacity capacitor C1, so when the power supply is connected to the motor controller, a step response will occur, resulting in the motor controller DC Instantaneous large current is generated on the bus. The impact of long-term instantaneous high current will reduce the service life of the main contactor, the DC bus fast fuse of the motor controller and the filter capacitor, so it is necessary to add a pre-charging circuit for the motor controller, such as th...

Claims

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