Energy conversion device, power system and vehicle

Abstract

The invention belongs to the technical field of electronics, and particularly relates to an energy conversion device, a power system and a vehicle. According to the device, the energy conversion device which comprises the motor coil, the bridge arm converter, the bidirectional bridge arm, the first capacitor and the bidirectional DC module and integrates driving and charging functions is adopted,so that the energy conversion device can work in a driving mode, a DC charging mode and an AC charging mode; the capacitor reuse purpose is achieved while motor driving and battery charging of the vehicle are conducted through the same system, the component reuse degree is high, the system integration degree is high, the structure is simple, and therefore the system cost is reduced, the system size is reduced, voltage at the two ends of the first capacitor can be pre-charged. The problems that an existing motor driving and charging system overall circuit is complex in structure, low in integration level, large in size, high in cost and large in heat loss during capacitor pre-charging are solved.

Description

technical field [0001] The present application belongs to the field of electronic technology, and in particular relates to an energy conversion device, a power system and a vehicle. Background technique [0002] With the development and rapid popularization of electric vehicles, motor control and battery charging of electric vehicles are becoming more and more important. At present, the motor drive of existing electric vehicles, the AC charging of the battery, and the DC charging of the battery are all independent, and in order to ensure the charging power or drive normally, it is usually necessary to connect the drive circuit, DC charging circuit and AC charging circuit. Set a capacitor in. [0003] However, although the above method can effectively guarantee the normal operation of the motor drive and battery charging of the vehicle, since the motor drive circuit and the battery charging circuit in the above method are independent and irrelevant to each other, and each ci...

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Problems solved by technology

[0006] The purpose of this application is to provide an energy conversion device, a power system, and a vehicle, aiming to solve the problems of complex structure, low integration, large volume, high cost, and heat loss during capacitor pre-charging in the existing overall circuit of the motor drive and charging system big problem

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