Parameter Identification of Induction Machines with Consideration of Rotor Core Loss

Woei-Luen Chen ； Kai-Mou Cheng

《電機工程學刊》 21卷1期 (2014/02) Pp. 13-20

https://doi.org/10.6329/CIEE.2014.1.02

並列摘要

Parameter estimation accuracy plays an extremely critical role in the control performance of an induction motor (IM). Conventional IM parameter estimation can be performed by a dc-test, a no load test, and a blocked-rotor test. The dc-test determines the equivalent resistance of the stator winding. The no-load test provides behavior related to the magnetic core. The rotor resistance can be derived from the blocked-rotor test. According to the no-load test, the rotor parameter should be irrelevant to the stator power. However, significant mismatch in active power can be observed between simulation and experiment from a squirrel cage IM (SCIM) operating under super and sub-synchronous revolution speed. The same result can also be obtained from a doubly-fed IM (DFIM) in the case of rotor open-circuit test. To compromise the mismatched active power resulted from the conventional equivalent model due to the no-load test, a resistance representing the rotor core loss is considered. A novel procedure is proposed to determine the parameters of the IM. The first step of the proposed procedure is to determine the stator resistance by the dc-test. The second step is to find out the stator core parameters by a no-load test performing at synchronous rotor speed. The rotor parameters and the turn ratio between stator and rotor windings are finally obtained by the load test and the blocked-rotor test. Experimental and simulation results regarding to a SCIM and a DFIM are performed to differentiate the accuracy between the conventional and the proposed IM models.

並列關鍵字

core loss ； induction machine ； parameter identification