Variable frequency controller for alternating current motor

Abstract

The invention discloses a variable frequency controller for an alternating current motor. The variable frequency controller comprises a control power module, an interface module, a processing module, a driving module and a power module, wherein the control power module is used for providing control power for the processing module and the driving module, the interface module is used for receiving control signals input from the exterior, the processing module is used for carrying out operation processing on the control signals received by the interface module from the exterior to output three-phase voltage control signals, the driving module is used for carrying out conversion processing on the three-phase voltage control signals output by the processing module to output three-phase rectangular pulse driving control signals, and the power module is used for carrying out power amplification on the three-phase rectangular pulse driving control signals output by the driving module and outputting three-phase alternating current power with the variable voltage / frequency to control the alternating current motor to run. By means of the variable frequency controller for the alternating current motor, the motor can be started under the rated current, and the current is smooth and free of impacts.

Description

technical field [0001] The invention belongs to the field of frequency conversion control, in particular to an AC motor frequency conversion controller specially used for tricycles. Background technique [0002] A DC motor refers to a rotating electrical machine that can convert DC electrical energy into mechanical energy or convert mechanical energy into DC electrical energy. It is a motor that can convert DC electrical energy and mechanical energy into each other. When it operates as a motor, it is a DC motor, which converts electrical energy into mechanical energy; when it operates as a generator, it is a DC generator, which converts mechanical energy into electrical energy. In existing electric tricycles, DC motors are mostly used as driving power. [0003] However, the inventors of the present invention have found that the DC motor in the existing tricycle has the problems of unstable startup and the starting current is likely to cause an impact on the motor and the po...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem of how to perform frequency conversion and speed regulation on the AC motor after replacing the DC motor of the existing tricycle with an AC motor for driving in the prior art, the present invention provides an AC motor frequency conversion controller specially used for tricycles

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