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Low-cost driving system with three independent power supplies and for electromobile

A technology of independent power supply and drive system, applied in electric vehicles, control drive, electric traction, etc., can solve the problems of electric vehicle drive system with three independent power supplies, and achieve low cost, high reliability, and low switch tube loss Effect

Active Publication Date: 2015-03-25
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the low-cost three independent power supply electric vehicle drive system proposed by the present invention has not been retrieved at home and abroad

Method used

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  • Low-cost driving system with three independent power supplies and for electromobile
  • Low-cost driving system with three independent power supplies and for electromobile
  • Low-cost driving system with three independent power supplies and for electromobile

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Experimental program
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Embodiment Construction

[0021] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] figure 1 It is a composition diagram of the low-cost three independent power supply electric vehicle drive system of the present invention. The system includes three independent power supplies, three switch tubes, a three-phase double salient drive motor, a position sensor, a current sensor and a control system, and is characterized in that: the three-phase double salient drive motor is composed of U1, U2 and U3 The first independent power supply (U1) and the first switching tube (Q1) are connected in series to form the first bridge arm, and the second independent power supply (U2) and the second switching tube (Q2) are connected in series to form the second bridge arm. Three independent power supplies (U3) and the third switching tube (Q3) are connected in series to form the third bridge arm, and the three bridge arms are connected in a triangle connection i...

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Abstract

The invention provides a low-cost driving system with three independent power supplies and for an electromobile. The system comprises the three independent power supplies, three switch tubes, a three-phase double-salient driving motor, a control system and the like. The system is characterized in that the three-phase double-salient driving motor is powered up by the three independent power supplies, a bridge arm is formed by connecting each independent power supply and a corresponding switch tube in series, three bridge arms are sequentially connected in an end-to-end mode in series in a triangle shape, and three connection points of the bridge arms are connected with a three-phase star-like winding of the double-salient driving motor respectively. The pole-arc coefficient of a stator core of the three-phase double-salient driving motor is 0.5, and the pole-arc coefficient of a rotor core of the three-phase double-salient driving motor is 0.333. The system is few in switching elements, low in cost, free of three-phase inverter direction connection and high in reliability and has high practicability.

Description

technical field [0001] The invention relates to a low-cost electric vehicle drive system with three independent power supplies, belonging to the technical field of electric vehicle drive. Background technique [0002] The drive system of electric vehicles often uses a three-phase bridge inverter, which uses 6 switching tubes, is expensive, has a high conduction voltage drop, and works under harsh conditions such as high temperature and high frequency. The weakest part of the drive system, the improper setting of the dead zone is very prone to through faults. Since reducing the number of switching tubes can effectively improve system reliability and reduce system cost, the market urgently needs to develop a driving system with fewer switching tubes and high reliability. [0003] Double salient pole motor is a new type of motor composed of position sensor, power electronic power converter, permanent magnet or electromagnetic excitation unit, controller and motor body with sal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18B60L15/00
CPCY02T10/7005Y02T10/70
Inventor 史立伟张学义
Owner SHANDONG UNIV OF TECH
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