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Switched reluctance motors (SRMs) are being considered for variable speed drive applications due to their simple construction and fault-tolerant power-electronic converter configuration. However, inherent torque ripple and the consequent vibration and acoustic noise act against their cause. Most researchers have proposed a cascaded torque control structure(More)
This paper proposes the use of iterative learning control (ILC) in designing a torque controller for switched reluctance motors (SRMs). The demanded motor torque is first distributed among the phases using a torque-sharing function. Following that, the phase torque references are converted to phase current references by a torque-to-current converter and the(More)
The transfer function (TF) of a transformer winding (or its natural frequencies) is known to be dependent on many factors, like the type of winding excited, terminal configuration and type of secondary winding, arrangement of windings, clearances, tap and its positions, phase position, etc. Further, it was well established about half a century ago that the(More)
A direct torque control algorithm for switched reluctance motor (SRM), using sliding mode control (SMC), is reported in this paper. SRM magnetization characteristics is highly non-linear, where torque is a complex and coupled function of phase current and rotor position. Finding equivalent current reference for a given torque reference becomes non-trivial.(More)
In this paper, iterative learning control (ILC) based direct instantaneous torque controller (DITC) for SRM is proposed. Direct torque control avoids the conversion of demanded motor torque into equivalent phase current references; which is non-trivial due to the coupled and non-linear torque, current and rotor position relationship. The instantaneous(More)
In this paper, a novel direct torque controller for switched reluctance motor (SRM) is proposed using spatial iterative learning control (ILC). SRM magnetization characteristics are highly non-linear, and torque is a complex and coupled function of phase current and rotor position. Direct torque control (DTC) scheme avoids the complexity of torque-to-(More)
In digital filters, maximum power consumption occurs during multiplication operations. Hence, to reduce power consumption, the number of multiplications has to be minimized. The number of Signed-Power-of-Two (SPT) terms in the filter coefficients has to be optimally minimized, without compromising on the filter response. A modified Differential Evolution(More)
In this paper, Radix-256 encoding scheme is used to reduce the number of partial products and Redundant binary (RB) number systems is used because of its unique carry propagation free addition property. RB number system was used to represent any of 257 multiplying coefficients as a RB number which consists of two of 16 fundamental multiplying coefficients.(More)
An analytical model is proposed for SRM phase flux-linkage, lambda in terms of phase current, i and rotor position, thetas. The key contribution of this paper is that instead of fitting a global function to lambda(i, thetas), it has been divided into four regions according to the physical characteristics. A two-stage polynomial fitting approach is used to(More)
The signal and image processing algorithm use multiplication as one of the basic arithmetic operation. So the efficient implementation of multiplier is always a challenge. The present work describes a method to build a faster array multiplier by delay optimized inter connection globally. The proposed array multiplier architecture performance in terms of(More)