Distributed battery winding independent power supply multi-phase motor driving system and method

A multi-phase motor, independent power supply technology, applied in the control system, AC motor control, electrical components and other directions, can solve the problems of insurmountable, inability to exert high reliability of multi-phase motors, increase circuit complexity, etc., to achieve low cost, Heat dissipation problem solving, strong adaptability effect

Inactive Publication Date: 2018-12-14
山东康钧环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of increasing the bridge arm on the basis of the traditional three-phase bridge inverter circuit structure to realize the control of the multi-phase motor cannot overcome the shortcomings of the bridge inverter circuit and cannot take advantage of the high reliability of the multi-phase motor. increases the complexity of the circuit

Method used

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  • Distributed battery winding independent power supply multi-phase motor driving system and method

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Such as figure 1 As shown, a multi-phase motor drive system in which the windings of the distributed battery pack are independently powered, the multi-phase motor 1 includes multi-phase windings, and each phase winding 2 is connected to a power supply unit separately, and all the power supply units are connected to the main control unit 5 through the communication bus 6;

[0035] The power supply unit includes a battery pack voltage conversion module 4, the anode of the battery pack voltage conversion module 4 is connected to a capacitor C3 and then connected to one end of the winding;

[0036] The negative electrode of the battery pack voltage conversion module 4 is connected to the other end of the winding;

[0037] The battery pack voltage conversion module 4 outputs a sinusoidal voltage waveform with a voltage offset, and outputs a standard ...

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Abstract

The invention discloses a distributed battery winding independent power supply multi-phase motor driving system and method. The multi-phase motor comprises a multi-phase winding, each phase winding isseparately connected with a power supply unit, and all the power supply units are connected with a main control unit through a communication bus. The power supply unit comprises a battery pack voltage conversion module, wherein the positive electrode of the battery pack voltage conversion module is connected with a capacitor C and then one end of the winding is connected with the capacitor C. Theother end of the negative electrode of the battery pack voltage conversion module is connected with the other end of the winding; The battery pack voltage conversion module outputs a sinusoidal voltage waveform with voltage offset, and outputs a standard sinusoidal voltage waveform after passing through the capacitor C. There is no high voltage power in the system. When the system does not outputpower, there is only a single battery voltage in the system, so the system is safer. When any battery pack voltage conversion module in the system fails, the module can exit the system, the system can work normally, and the multi-phase motor can play a high reliability and other characteristics.

Description

technical field [0001] The invention relates to the technical field of energy power and motor control, in particular to a multi-phase motor drive system and method for independent power supply of distributed battery pack windings. Background technique [0002] At present, the power integration and motor drive scheme of electric vehicles generally adopts: the power battery is connected in series to obtain high voltage, the motor is driven by the motor controller, and the battery status is monitored by the battery management system. In order to obtain a higher voltage, more batteries need to be connected in series, and the consistency of the batteries is required to be high. The damage of each single battery will affect the use of the entire battery pack. The more batteries connected in series, the lower the reliability. There is always a high voltage in the battery pack in series, which poses a safety hazard. The motor controllers all adopt the traditional three-phase bridge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/22H02P27/06
CPCH02P25/22H02P27/06
Inventor 朱智富李水根张翼孙鹏陈冲刘臻
Owner 山东康钧环保科技有限公司
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