Electric drives and electric equipment

Abstract

The invention provides an electric drive device and electric equipment adopting multiple control methods. The electric drive device of the present invention is provided in an electric equipment for driving the electric equipment, and includes: a polyphase motor; a control part; a driving part; and a power conversion part, wherein the control part has at least one calculation control unit and m outputs The multi-phase motor has m multi-phase winding units. The calculation control unit calculates and obtains m groups of switch control signals according to the command signal, and outputs m groups of switch control signals to the driving part through m output terminals. Each driving unit receives the corresponding switch control signal, and form a drive signal according to the switch control signal, each power converter converts the direct current into the polyphase line current required by the polyphase winding according to the corresponding drive signal, and calculates the m groups of switch control signals output by the control unit so that m The waveform of the in-phase line current of the multi-phase winding units is formed by superposition, which is close to a sine wave.

Description

technical field [0001] The invention belongs to the field of electric motors, and in particular relates to an electric drive device and electric equipment adopting multiple control methods. Background technique [0002] In today's society, the requirements for environmental protection are getting higher and higher, and the environmental protection standards of various equipment are also raised. With the gradual exhaustion of oil, a non-renewable energy source, the development and application of green energy has been promoted. In order to better protect the environment and reduce dependence on petroleum resources, the state has issued various policies and vigorously promoted new energy and renewable energy. [0003] At present, the use of electrical energy as the power of various equipment has become the mainstream of development. Electric devices that use electricity as energy, such as electric buses, electric cars, and electric forklifts, are also increasingly favored by ...

AI Technical Summary

Problems solved by technology

[0007] In a high-power high-performance electric drive device, the increase in the operating current and switching frequency of the power switch tube leads to an increase in the heat generation and temperature rise of the power switch tube, which affects the reliability and safety of the electric drive device.

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