Power converter for switched reluctance motor of battery-supercapacitor electric vehicle

Abstract

The invention relates to a power converter for a switched reluctance motor of a battery-supercapacitor electric vehicle. According to the invention, a power converter topology, in which a battery and a supercapacitor are cascaded with an asymmetry half-bridge circuit of the switched reluctance motor through a three-switch series dual-input DC-DC converter, is adopted to act a main power converter of a battery-supercapacitor hybrid power electric vehicle switched reluctance motor driving system, a source end DC-DC converter can realize dual-source access of the battery and the supercapacitor, a rear-stage asymmetry half-bridge power converter is enabled to be adjustable in bus voltage, and a rear-stage asymmetry half-bridge power circuit can realize driving control for the switched reluctance motor. The power converter provided by the invention can realize requirements of battery-supercapacitor dual-storage energy input control and switched reluctance motor driving control simultaneously. In addition, the power converter effectively saves switch tube resources, can further reduce the system cost and the size, and has the advantages of high integration, light weight, low cost and the like.

Description

technical field [0001] The invention relates to a switched reluctance motor power converter for a battery supercapacitor electric vehicle, belonging to the technical field of electric vehicle motor drive. Background technique [0002] The motor drive system is the core part of electric vehicles. At present, the relatively mature DC motors, AC induction motors and permanent magnet synchronous motors have been widely used in the field of electric vehicles. Compared with DC motors and induction motors, permanent magnet synchronous motors have the advantages of high efficiency, high power density, and high torque density, and are extremely competitive in the field of electric vehicles. However, due to the dependence on rare earth permanent magnet materials, its development is bound to be restricted by rare earth resources and costs. Therefore, it is the development trend of electric vehicle drive motor technology to study high-performance motor systems that do not require rare ...

AI Technical Summary

Problems solved by technology

[0006] Purpose: In order to solve the problem of energy management of dual storage energy input and the drive control of switched reluctance motors in the switched reluctance motor drive system of batteries and super capacitor hybrid electric vehicles, the invention provides a battery super capacitor electric vehicle switched reluctance motor power converter

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