Parameter Identification and Auto-Tuning of IPMSM for Self-Commissioning

Abstract

This paper presents a practical self-commissioning technique for interior permanent magnet synchronous motor drives. Knowledge of the system parameters is essential to achieve well-tuned and stable controllers for high performance and efficient control of motor drives. In order to reduce the time and effort spent on commissioning, the parameter identification and control loops tuning processes are automated in such a way that no additional tool is required. In this context, identification of the current loops' parameters during standstill using recursive least squares technique initially. Then, the gains of the current controllers are determined by using simple pole-zero cancellation method which allows user to define the bandwidth of the closed loop system. Thus, motor drives can be started to drive in closed loop current mode and magnet flux linkage can be identified in this stage. After that, by using estimated electrical parameters, the mechanical parameters are estimated to tune the speed loop gains such that to obtain a desired closed loop bandwidth. The presented structures are implemented on TI C2000 MCU controlled drive and tested on a motor within additional inertia loads in real time.