期刊
IEEE TRANSACTIONS ON ENERGY CONVERSION
卷 31, 期 1, 页码 270-282出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TEC.2015.2480961
关键词
Flux estimation; induction motor; model reference adaptive system (MRAS); sensorless vector control
资金
- Sevcon Ltd.
- U.K.'s Engineering and Physical Sciences Research Council (EPSRC) through the Engineering Doctorate (Eng.D.) program at Newcastle University
In this paper, an improved rotor flux estimation method for the Torque model reference adaptive schemes (TMRAS) sensorless induction machine drive is proposed to enhance its performance in low and zero speed conditions. The conventional TMRAS scheme uses an open loop flux estimator and a feedforward term, with basic low pass filters replacing the pure integrators. However, the performance of this estimation technique has drawbacks at very low speeds with incorrect flux estimation significantly affecting this inherently sensorless scheme. The performance of the proposed scheme is verified by both simulated and experimental testing for an indirect vector controlled 7.5-k W induction machine. Results show the effectiveness of the proposed estimator in the lowand zero-speed regions with improved robustness against motor parameter variation compared to the conventional method.
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