Control method of motor controller of electric bicycle

Abstract

The invention provides a motor controller of an electric bicycle and a control method thereof. The motor controller comprises a sine wave driver (1), motor phase lines (2), a motor (3) and a position sensor (4). The sine wave driver (1) is electrically connected with the motor (3) through the motor phase lines (2) and the position sensor (4) which is a three-phase position sensor. The motor controller is further comprises a motor phase current sampling inductor (5), and the motor phase current sampling inductor (5) is installed on one motor phase line (2) and feeds back the sampling result to the sine wave driver (1). The control method includes the steps that vector signals are set and sent to the motor (3), the sine wave driver (1) compares vector signals detected and fed back by the position sensor (4) with phase current signals detected and fed back by the motor phase current sampling inductor (5) and calculates the vector angle, components of three-phase currents of the driver are figured out, and the motor (3) outputs the continuously changing three-phase currents.

Description

technical field [0001] The invention relates to a motor controller of an electric bicycle capable of outputting continuous phase current and a control method thereof. Background technique [0002] Electric bicycles powered by electricity are widely used because of their light weight and no exhaust pollution, and have become one of the main means of travel in China. The driving motor of the existing electric bicycle uses a square wave current, which has the advantages of a simple controller structure and easy generation of waveforms, but at the same time has disadvantages such as poor control accuracy, large torque fluctuations, high vehicle driving noise, and obvious vehicle vibration. . Contents of the invention [0003] One of the objects of the present invention is to provide a motor controller of an electric bicycle with stable running and high motor control precision. [0004] To achieve the above object, the present invention provides the following technical soluti...

AI Technical Summary

Problems solved by technology

The driving motor of the existing electric bicycle uses a square wave current, which has the advantages of a simple controller structure and easy generation of waveforms, but at the same time has disadvantages such as poor control accuracy, large torque fluctuations, high vehicle driving noise, and obvious vehicle vibration.

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