Electric drives and electric equipment

Abstract

The invention provides an electric driving device and electric equipment with multiple control methods. The electric drive device provided by the present invention includes: a multi-phase motor; a DC power supply; a control unit; a drive unit; and a power conversion unit, wherein the multi-phase motor has m multi-phase winding units, and the control unit calculates according to a predetermined method Get m sets of switch control signals and output them to the drive part, the drive part forms the drive signal, and the power conversion part converts the DC power into the multi-phase line voltage required by the multi-phase winding of the multi-phase motor according to the corresponding drive signal, and each multi-phase winding unit According to the multi-phase line voltage, a rotating original flux vector is generated in the space of the multi-phase motor, and the original flux vector is synthesized in the space of the multi-phase motor to generate a rotating synthetic flux vector, and the synthetic flux vector is consistent with the predetermined output value Correspondingly, the m sets of switch control signals output by the control unit make the trajectory of the synthesized flux vector close to a circle.

Description

technical field [0001] The invention belongs to the field of electric motors, and particularly relates to an electric drive device and electric equipment with 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 manuf...

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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