Integral Plus Proportional Controller Based Speed Control of Direct Torque Controlled IPMSM

Abstract

Recently, interior permanent magnet synchronous motors (IPMSMs) have gained an increasing popularity in a variety of industrial applications. As the technology gets improved, studies on IPMSM such as direct torque control (DTC) method have been improved as well. The main idea in DTC is to use the motor flux and torque as basic control variables. To control speed of an IPMSM incorporated of DTC, in this paper, the authors design and simulate a controller, which is called integral plus proportional (IP) controller, to control the speed of IPMSM incorporated DTC. In order to obtain the stable performance of speed of IPMSM, the gains of designed IP controller are chosen by choosing the proper value of poles. Moreover, the chosen gains of IP controller confirm that the steady state error and the overshoot problems can be minimized and the controller becomes robust against the disturbance of load torque. The effectiveness of our designed IP controller to control speed of IPMSM incorporated with DTC method is verified by Matlab/Simulink software. It is seen from simulation works that the performance of IP controller is better as compared with the conventional proportional integral (PI) controller.