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Simultaneous Estimation of Rotor Speed and Rotor Resistance of an Induction Motor Using Variable Rotor Flux  

Lee Zhen-Guo (Department of Mechatronics, Graduate School, Pukyong rational University)
Jeong Seok-Kwon (Division of Mechanical Engineering, Pukyong National University)
Publication Information
Journal of Power Electronics / v.5, no.4, 2005 , pp. 282-288 More about this Journal
Abstract
In this paper, a new speed sensorless induction motor scheme which can estimate rotor speed and rotor resistance simultaneously is presented. The rotor flux with a low frequency sinusoidal waveform is used to conduct on-line simultaneous estimation of the rotor speed and rotor resistance. Hence the proposed sensorless control method is robust to rotor resistance variations. Also, the control scheme has no current minor loop to determine voltage references. It contributes to good control performance at low speeds. Some simulation results supported by experiments are given to show the effectiveness of this method.
Keywords
Induction motor; Feedforward torque control; Speed sensorless control; Variable rotor flux; Simultaneous estimation; Speed estimation; Rotor resistance estimation; Robust control;
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