Voltage Booster for Optimizing Scalar Control Methods on Single Passenger Electric Vehicles

Abstract

Introduction: In the induction motor speed regulation, there are several types of settings. This is due to the development of motor control that is always there to suit the needs. In this study, a scalar control method of motor speed regulation was developed. Scalar control is often found in industrial equipment, such as the use of a variable speed drive (VSD) for induction motors. This is due to the relatively flexible setting with the scalar control method in the use of various motor speeds with constant torque. However, for heavy loads, controlling requires a large starting torque. Therefore, a system is needed to support the existing methods in meeting the control needs. Method: Giving a voltage booster can provide additional torque on motor speed regulation. A voltage booster can be applied at low-speed conditions to provide more starting torque to simplify the speed regulation process. Based on the scalar control algorithm, the use of the STM32F407VE type microcontroller has the features of efficient induction motor control. The PWM module is used to generate sinusoidal pulse width modulation (SPWM). Result: After download the program on software design to hardware controller, the motor load test showed that the current used at low frequencies was relatively safe and could drive the motor rotation under heavy loads, which in this case was tested on a single passenger electric vehicle. The motor in the electric vehicle was tested at a low speed of 700Rpm, i.e. at half the nominal frequency of 50Hz. The results show that the current under these conditions reaches 2.2A. Conclusion: The use of a voltage booster gives good results in providing starting torque at low speeds without the need for additional tools.