PI-Based SRM Speed Control System

Abstract

There are three types of motors used in electric vehicles currently, namely permanent magnet synchronous motors, induction motors, and Switched Reluctance Motors (SRM). SRM has its advantages over other types of motorcycles. The advantages of SRM are weight, reliability, fault tolerance, and acceleration time. However, the SRM motor needs to be adjusted to have the required speed and transient response. This study aims to simulate and design speed control in SRM. The Proportional Integral (PI) control simulation is firstly conducted by using MATLAB to see the results of the control before it is implemented in SRM. From the results of the SysId Matlab, it is obtained system transfer function in the first order. The transfer function of this system is used to determine the value of Kp and Ki analytically obtained the value of Kp is 0.006159 and Ki is 0.054752. SRM operates at PWM 72-84 or in a duty cycle of 28.23% - 32.94%. This PWM signal is equivalent to the driver input voltage of 1.446 Volts - 1.756 Volts. The implementation is conducted by using an Arduino microcontroller and it only uses a positive control signal that makes the motor rotate in only one direction. From the simulation and implementation that were carried out, it is found that the control system that has been designed is able to track the speed at the setpoint, namely 400 rpm, 600 rpm, and 800 rpm. The settling time, respectively, is 1.2 s, 2 s, and 1.3 s, overshoot is 52.75%, 62.16%, and 13.87%. The steady-state error for each setpoint is 10%, 0.33%, 0.5%.