Induction machine parameter identification using PWM inverter at standstill

Abstract

This paper presents a new approach to identify the induction machine parameters using the PWM inverter. For the field oriented control of the induction machine, accurate induction machine parameters are necessary. Usually, the inverter utilizes the machine parameters supplied from the manufacturer or estimated by extraneous tests. To overcome this problem, the proposed method utilizes the PWM inverter itself for machine parameter identification at standstill. All the test procedures are performed and the parameters are identified by the PWM inverter and its own controlling computer. The proposed method has been implemented on actual inverter systems and thoroughly tested on two different induction machines to confirm its feasibility The authors present a new standstill parameter identification method for an induction machine driven by a voltage source PWM inverter. All tests and parameter estimation procedures are performed by the PWM inverter and its own controlling computer without the aid of any extra equipment SW (Took 5 mins).