Design of Driver Circuit to Control Induction Motor Applied in Electric Motorcycles

This paper presents a design of a controller circuit and a control method for a three-phase asynchronous motor applied in electric motorcycles. The research focused on two main tasks including signal processing and power driving. In particular, the signal control device is an Atmega328P microcontroller, which is basically an Advanced Virtual RISC (AVR). The microcontroller plays a role as a central processor to create the Pulse Width Modulation (PWM) and turn the DC voltage on and off. The width of each pulse was altered based on AVR so that the overall voltage at the output is similar to the sine wave. Insulated-gate bipolar transistors (IGBTs) were used as the power part to drive the induction motor. The control method is based on the principle of variable frequency drive (VFD). The DC voltage is converted to an AC sine wave voltage by reading the lookup table. The waveform can be refined until closely resembles that of a pure sine wave. The experiment then was performed to evaluate the circuit. The driver is applied to control a 2HP motor in an electric motorcycle model.