Multi-phase AC motors, inverters, electric drive components and electric devices

Abstract

The present invention provides an electric drive assembly, an electric device, an inverter and a multi-phase AC motor, wherein the electric drive assembly includes: a multi-phase AC motor with k phases, rated line voltage and rated line current; Power supply, a power supply with a constant voltage corresponding to the rated line voltage, is used to provide a DC power corresponding to the rated line current; an inverter, which converts the DC power into AC power according to the control signal and supplies it to the multi-phase AC motor. Among them, the multi-phase AC motor has m mutually independent multi-phase windings, the inverter has m inverter units corresponding to the m multi-phase windings, and each inverter unit has k bridge arms connected in parallel The part provides k line currents to the corresponding multi-phase windings. Each bridge arm part contains w inverter bridge arms connected in parallel with each other. Both k and m are positive integers above 2, and w is a positive integer between 2 and 4. .

Description

technical field [0001] The invention belongs to the field of alternating current motors, and in particular relates to a large-current multiphase alternating current motor, an inverter, an electric driving assembly including the multiphase alternating current motor and the inverter, and an electric device including the electric driving assembly. Background technique [0002] High-power electric devices usually choose an AC motor as the driving motor. The AC motor is connected to the inverter, and the inverter is connected to the DC power supply. When the motor starts to start, the inverter converts the DC power into AC power according to the control signal sent by the controller and the trigger circuit, and supplies it to the AC motor. [0003] For mobile electric devices such as locomotives, ships or ships, batteries are generally selected as DC power sources. For safety reasons, the voltage of the battery should not be too high, generally less than 60 volts. Therefore, in ...

AI Technical Summary

Problems solved by technology

combine figure 2 and image 3 Based on the advantages of inverters and multi-phase AC motors, a new electric drive component is proposed, which not only overcomes the defects of low-voltage and high-current motors caused by the poor consistency of semiconductor switching elements, but also avoids the image 3 Too many AC motor and inverter connectors increase the difficulty and cost of production and maintenance

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