Parameters Identification Of The Induction Machine With Compound Cage Rotor Based On Kalman Filtering

The working principle of the induction machine with compound cage rotor is discussed in this paper at first. Basing on the voltage and flux linkage equations of the induction manchine with compound cage rotor, the state space model of the motor is got. If the state equations are considered as news model and the output equations are considered as observation equations, the equations to describe non-linear controled system can be got. Because the special rotor slot is adopted and there are both aluminum and copper iron alloy that can conduct and permeat in the slot, the induction machine with compound cage rotor is of not only good starting performance but also working performance which is close to that of squirrel-cage induction machine. As a result of compound material, there is large difference between the starting rotor parameters and the steaty-state work parameters. Big error will be caused if the parameters which are measured by common non-load and locked-rotor tests are used to analyze the starting performance. In this paper, the starting parameters of the motor is estimated by kalman filtering arithmetic that is a parameter test mehod that can be considered the running state. Base on the basic kalman filtering arthmetic, linearization extended kalman filtering arthmetic that is fit to the motor system that is a non-linear controled system is got. In the process of parameters identification, the stator voltag is considered as input quantity and the stator current and motor rotate speed are considered output quantities. The rotor resistance and leakage inductance are estimated on-line and the identification results is got at last. In this paper, the starting process is studied by simulation thich is carried out using identification parameters and common test parameters respectively and the results are compared with that of test. It can be indicated that the running state is considered by the method of indentification parameters. At last, the starting process of the common induction machine is studied by simulation and the results are campared with that of the induction machine with compound cage rotor...