Motor drive and power return two-way power source of electric automobile

A technology of motor drive and energy feedback, which is applied in electric vehicles, electric energy management, and adjustment of electric variables to achieve high efficiency, improve efficiency, and improve the scope of application.

Inactive Publication Date: 2012-03-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention is reasonable in design, convenient and practical, and the power supply solves the problem of the soft characteristics of the battery directly loaded and the energy feedback problem of the electric vehicle

Method used

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  • Motor drive and power return two-way power source of electric automobile
  • Motor drive and power return two-way power source of electric automobile
  • Motor drive and power return two-way power source of electric automobile

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Embodiment

[0029] The structure diagram of the present invention is as figure 1 , 2 , 3, and 4, the electric vehicle motor drive and energy feedback bidirectional power supply of the present invention includes an energy conversion DC part and a forward motor drive and reverse motor power recovery part, wherein the energy conversion DC part includes a bidirectional DC / DC Converter 1, bidirectional DC / DC converter digital control system 2, forward inverter and reverse rectification circuit 3, motor drive digital control system 4, bidirectional DC / DC circuit drive protection circuit 5, inverter circuit drive protection circuit 6 , battery voltage detection circuit 7, battery current detection circuit 8, bus voltage detection circuit 9, motor current detection circuit 10, wherein battery voltage detection circuit 7, battery current detection circuit 8, bus voltage detection circuit 9, motor current detection circuit 10 and The bidirectional DC / DC converter digital control system 2 is conne...

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Abstract

The invention provides a motor drive and power return two-way power source of an electric automobile, and the two-way power source comprises an energy conversion direct current part and a positive motor drive and reverse motor electric energy recovery part, wherein the energy conversion direct current part comprises a two-way DC (direct current) / DC converter, a two-way DC / DC convertor digital control system, a positive inversing and reverse rectifier circuit, a motor drive digital control system, a two-way DC / DC circuit driving and protecting circuit, an inverter circuit driving and protecting circuit, a battery voltage detecting circuit, a battery current detecting circuit, a bus voltage detecting circuit and a motor current detecting circuit. A battery is connected with the two-way DC / DC convertor, so that the bus voltage of a motor driving circuit is adjusted to be a stable value, and the driving circuit drives a permanent magnet synchronous motor to run so as to drive the automobile; and the motor is in an electricity generation status when the automobile is braked, the motor driving circuit transmits the energy to a bus, and a microcontroller detects a brake signal and drives the two-way DC / DC convertor to feed the energy back to the battery. Furthermore, the characteristic and efficiency of the electromagnetic compatibility (EMC) of the power source can be improved.

Description

technical field [0001] The invention is a bidirectional power supply for motor drive and energy feedback of electric vehicles, which belongs to the innovative technology of bidirectional power supply for motor drive and energy feedback of electric vehicles. Background technique [0002] At present, in the field of electric vehicles, the motor drive method uses batteries to supply power to the motor drive circuit to drive the motor. Because the working environment of the motor is relatively complicated, its power supply requirements vary according to different road conditions, and the range of speed changes is wide. Acceleration and deceleration bring more unstable factors to the system that directly uses the battery to supply power to the motor drive circuit. Specifically, the form of the battery directly supplying power to the motor drive circuit mainly has the following problems: [0003] (1) The stability of the motor drive circuit. Since the battery is directly powered...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/16H02M3/315
CPCY02T10/7241Y02T10/7216Y02T10/72
Inventor 李志忠周映虹李优新刘方铭姚震黎勉粱秀玲黄熙
Owner GUANGDONG UNIV OF TECH
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