Linearized Modeling of Switched Reluctance Motor for Closed-Loop Current Control

Ahmad, Syed Shahjahan and Narayanan, G (2016) Linearized Modeling of Switched Reluctance Motor for Closed-Loop Current Control. In: IEEE India International Conference on Power Electronics, DEC 08-10, 2014, Kurushetra, INDIA, pp. 3146-3158.

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Abstract

Current control of a switched reluctance motor (SRM) is challenging due to nonlinearity and double saliency of the machine. A linear proportional-integral (PI)-based current controller, which is popular in other electrical machines, cannot be directly applied, as this requires a linearized machine model. This paper examines different small-signal linearized models for an SRM and identifies the model best suited for the purpose of current controller design. This paper then utilizes this linearized model to propose a fixed proportional-integral (PI)-based current controller, the parameters of which can be selected directly from the machine parameters. This paper also proposes a simple method to evaluate back-electromotive force (EMF) for the purpose of disturbance rejection during current control. The performance of the proposed fixed-PI-based control with back-EMF compensation is better than that of delta modulation in terms of current ripple; it is comparable to that of variable-gain PI with back-EMF compensation in terms of current ripple and current reference tracking. While variable-gain PI requires knowledge of the entire flux-linkage characteristics and involves calculation of controller gains in every sampling interval, the proposed method requires only limited details of the motor characteristics and is much simpler to implement.

Item Type:	Conference Proceedings
Publication:	IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Additional Information:	Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	08 Oct 2016 05:39
Last Modified:	08 Oct 2016 05:39
URI:	http://eprints.iisc.ac.in/id/eprint/54698

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