Ziegler-Nichol's method of online tuning of PMSM for improved transient response

Abstract

Tuning of PID controllers is one of the important ways to achieve desired performance of a system. PMSM drives are the upcoming parts in the field of Hybrid Electric Vehicles, etc., Many methods are available for the tuning of PID controllers. In this paper an online tuning of PID controllers using Zeigler-Nichol's method for PMSM drives is presented to improve the transient response of the drive. A conventional PID controller is also used to control the machine. These two methods are compared with respect to their transient response, i.e., with respect to their settling times. It is found that the Zeigler-Nichol's method gives much improved transient response than the other. The transfer function of the PMSM is obtained from its state model defined in d-q-o model which is made use in the simulation. MATLAB/Simulink is used for the simulation and the results are also shown.