Electric bicycle mechanical variable speed type motor controller and variable speed control method thereof

Abstract

The invention relates to an electric bicycle mechanical variable speed type motor controller and a variable speed control method thereof. The electric bicycle mechanical variable speed type motor controller is characterized by comprising the following steps of (1) selecting an automatic variable speed mode, collecting a rotor position signal of a motor and transmitting the rotor position signal to a central processor through a coding unit; (2) enabling riding speed to be served as one of a variable speed judgment condition under an automatic variable speed mode through the central processor; (3) reading and inputting a voltage value to a current detection unit through an output end of a motor driving circuit, providing a voltage signal to the central processor to serve as another variable speed judgment condition under the automatic variable speed mode after the voltage signal is amplified through the current detection unit through the current detection unit; (4) enabling the central processor to judge motor steering according to the riding speed and a motor operation current value and providing a corresponding control signal to a motor driving circuit to control rotation and inversion work of the motor to achieve mechanical variable speed. The electric bicycle mechanical variable speed type motor controller automatically changes speed to an optimal operation speed according to variation of parameters of the driving speed, the resistance and the current under the automatic variable speed mode.

Description

technical field [0001] The invention belongs to a motor controller for an electric bicycle, in particular to a mechanical variable speed motor controller for an electric bicycle and a method for controlling the variable speed. Background technique [0002] At present, the motor controllers of electric bicycles all have the function of motor speed regulation, which controls the motor speed by changing the motor current according to the strength of the handlebar signal, so as to achieve the purpose of speed regulation. The motor is initially designed with only one speed for optimum efficiency. If it is designed for the best efficiency when driving at high speed, the low-speed performance is very poor, that is, the ability to start climbing is poor; if it is designed for the best efficiency when starting and climbing, the performance at high speed is very poor, that is, it consumes electricity. There is only a trade-off between high-speed and low-speed characteristics. When de...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to overcome the deficiencies of the above-mentioned technologies, and provide a mechanical variable speed motor controller for electric bicycles and a method for controlling the variable speed. By adding the function of selecting the variable speed mode and the forward and reverse control function of the motor, it is possible to control the mechanical speed change of the electric bicycle motor. It solves the problem that the electric bicycle can not have both the normal endurance working state ability and the starting or climbing ability

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