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IGBT carrier frequency control method and device, and electric automobile

A carrier frequency, electric vehicle technology, applied in electric vehicles, control devices, electric vehicle charging technology, etc., can solve the problems of inability to adjust the IGBT switching frequency and inability to meet

Active Publication Date: 2020-07-14
BEIJING CO WHEELS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a control method, device and electric vehicle for IGBT carrier frequency, to solve the problem of working with fixed IGBT switching frequency in different speed ranges in the related art, and it is impossible to accurately adjust the IGBT switching frequency according to the operating conditions of the electric vehicle. , unable to meet the different needs of NVH and motor controller control efficiency under different operating conditions

Method used

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  • IGBT carrier frequency control method and device, and electric automobile
  • IGBT carrier frequency control method and device, and electric automobile
  • IGBT carrier frequency control method and device, and electric automobile

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Embodiment Construction

[0029] In order to make the purpose, technical solution, and advantages of the embodiments of the present application clearer, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] In the description of the embodiments of the present application, the terms "first" and "second" are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as ...

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Abstract

The invention discloses an IGBT (insulated gate bipolar transistor) carrier frequency control method and is applied to control of the IGBT carrier frequency of a motor controller of an electric vehicle. The method comprises steps of monitoring a motor current value under the condition that an electric vehicle is started; determining a first switching frequency of the IGBT according to the motor current value and a first preset corresponding relation, wherein the first preset corresponding relationship is an optimal solution of the corresponding relationship between a motor current value and the IGBT switching frequency obtained by the IGBT for control efficiency of the motor controller in the specified working noise environment; and adjusting the carrier frequency of the IGBT to the firstswitching frequency. The invention further discloses a control device of the IGBT carrier frequency and an electric automobile.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an IGBT carrier frequency control method and device and an electric vehicle. Background technique [0002] As a sustainable new energy vehicle, electric vehicles are increasingly favored by users and automobile manufacturers. The motor and its controller are the core components of electric vehicles, including the motor, motor controller and corresponding control strategies. The insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) is a key device in the motor controller that converts the DC provided by the battery into the AC power of the motor. As a power semiconductor device, the IGBT has high power density, small geometric size, and high efficiency. The advantage is that it is a very ideal switching device. [0003] However, during the switching process of IGBT, switching loss will be generated. Usually, switching loss accounts for 30%-70% o...

Claims

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Application Information

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IPC IPC(8): B60L15/20H02P27/06H03K17/567
CPCB60L15/20H02P27/06H03K17/567B60L2240/421B60L2240/429Y02T10/64Y02T10/72Y02T90/16
Inventor 李龙刘涛
Owner BEIJING CO WHEELS TECH CO LTD
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