Electric vehicle driving and charging integrated circuit and torque elimination control method thereof

A technology of electric vehicles and circuits, applied in electric vehicle charging technology, motor generator control, electric vehicles, etc., can solve the problems of motor drive performance impact, power density to be improved, drive control complexity, etc., to achieve power density improvement, control Simple, Power-Dense Effects

Active Publication Date: 2021-05-11
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to maintain static charging of electric vehicles, the torque elimination problem of the motor windings needs to be solved when the motor windings are reused as charging filter inductors. There are three main existing solutions: (1) Multi-phase motors are used. The control is complicat

Method used

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  • Electric vehicle driving and charging integrated circuit and torque elimination control method thereof
  • Electric vehicle driving and charging integrated circuit and torque elimination control method thereof
  • Electric vehicle driving and charging integrated circuit and torque elimination control method thereof

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0038] Such as figure 1As shown, the electric vehicle driving and charging integrated circuit provided in this embodiment includes a power battery 1, a bidirectional DC / DC converter 2, a four-leg DC / AC converter 3, a three-phase motor 4, an auxiliary inductor 5, The first conversion contact switch 6A, the second conversion contact switch 6B, the first single contact switch 7A, the second single contact switch 7B, the AC interface 8 and the control unit 9; the four-leg DC / AC converter The four bridge arms of 3 are respectively the first, second, third, and fourth bridge arms, and each bridge arm includes two switching tubes; the three-phase motor 4 includes three stator windings, which are respectively the first, second, and third stator windings. winding, each stator wi...

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PUM

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Abstract

The invention discloses an electric vehicle driving and charging integrated circuit and a torque elimination control method thereof. The electric vehicle driving and charging integrated circuit comprises a power battery, a bidirectional DC/DC converter, a four-bridge arm DC/AC converter, a three-phase motor, an auxiliary inductor, a first conversion contact switch, a second conversion contact switch, a first single-contact switch, a second single-contact switch, an alternating current interface and a control unit. The circuit only adds one auxiliary inductor to realize three-phase input charging, and has the advantages of simple motor driving control, no need of redesign of the motor and high power density. The invention further provides a torque elimination control method of the circuit. Motor torque elimination during charging is achieved through bridge arm parallel control, the inductance value of an auxiliary inductor does not need to be designed to be consistent with the equivalent inductance of a motor stator winding, and the method has the advantage of being high in robustness.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle charging, in particular to an electric vehicle driving and charging integrated circuit and a torque elimination control method thereof. Background technique [0002] It is known in the industry that due to the limited battery life, the development of electric vehicles cannot do without the battery charging system. However, at present, the high-power charging piles outside the car depend on the site, and the construction cost is high, while the charger inside the car is limited by space and weight, and the power is low. On the other hand, electric vehicle drive systems are currently becoming more and more powerful. Some scholars propose to reuse the inverter of the motor drive system as the rectifier of the battery charging system, and reuse the motor winding as the charging filter inductor to construct an integrated drive and charging circuit, which can greatly reduce the volume, weigh...

Claims

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Application Information

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IPC IPC(8): H02J7/06H02P21/05B60L53/24
CPCH02J7/06H02P21/05B60L53/24B60L2210/10B60L2210/40Y02T10/92
Inventor 杜贵平雷雁雄李土焕陈思强
Owner SOUTH CHINA UNIV OF TECH
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