Arrangement for power conversion and power drive

By combining charging and driving functions in an electric vehicle and utilizing the configuration of stator windings and power switches, the high cost and low efficiency of existing EV systems are solved, achieving space saving and improved reliability, and adapting to various EV needs.

CN116034534BActive Publication Date: 2026-03-20HUAWEI TECH CO LTD
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Patent Information

Application Number
CN202080103995.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-11-24
Publication Date
2026-03-20
Estimated Expiration
2040-11-24

AI Technical Summary

Technical Problem

The charging and driving functions of existing electric vehicles (EVs) are usually separate, resulting in high capital and operating expenditures, and they cannot be used simultaneously. Existing integrated solutions suffer from problems such as low efficiency, damage to mechanical parts, noise and vibration.

Method used

An arrangement including a power converter, a motor, and a power switch is adopted. By configuring the potential of the stator windings and controlling the power switch, the charging and driving functions are combined. By utilizing inductors and power electronic devices, multiple operating modes are provided to adapt to different needs.

Benefits of technology

It achieves space saving, improved power density, efficiency and reliability, customizability to meet different EV needs, and supports bidirectional electric operation.

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Abstract

An arrangement (2) for power conversion and electric drive comprising a power converter (201) comprising three branches (202), an electric motor (203) comprising three open-end stator windings (204) each having a first end and a second end, and a power switch (205). The first ends of the stator windings (204) are connected to respective ones of the three branches (202) of the power converter (201), and the second ends of the stator windings (204) are connected together and have the same potential. The power switch (205) is used to selectively disconnect one of the second ends of the stator windings (204) from all other second ends to establish at most two different potentials. The established at most two different potentials of the second ends of the stator windings (204) can be connected to respective ones of the branches (206) of a grid interface (207) connected to the arrangement (2).
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