Operational range extension method for limited‐angle torque motors with irregular slot numbers

A New Doubly Segmented Structure for Switched Reluctance Motors with High Torque Capability

In this paper, a new magnetic structure for switched reluctance motors is presented. In this structure, both stator and rotor has a segmented topology and there is no magnetic flux path between two stator/rotor segments or any possible combination of them. The proposed segmental structure may be considered with different number of phases as well as different number of segments per phase for any...

A Neural Network-PSO Based Control for Brushless DC Motors for Minimizing Commutation Torque Ripple

This paper presents the method of reducing torque ripple of brushless DC (BLDC) motor. The commutation torque ripple is reduced by control of the DC link voltage during the commutation time. The magnitude of voltage and commutation time is estimated by a neural network and optimized with an optimization method named particle swarm optimization (PSO) algorithm analysis. The goal of optimizati...

Fractional Slot Permanent Magnet Synchronous Motors for Low Speed Applications

Cogging Torque Control in Brushless Dc Motors

During the past five years, cogging torque in HDD spindle motors has decreased drastically as designers and manufacturers have developed a better understanding of the cogging phenomenon. This paper examines various methodologies of cogging torque reduction. Timing techniques such as dead zones and tooth notching, smoothing techniques such as sinusoidal magnetization, and geometric techniques su...

Direct Torque Control Strategy of Induction Motors

Direct Torque Control of inverter-fed Induction Machine allows high dynamic performance by means of very simple control schemes. In this paper various direct torque control methodologies as conventional DTC (C_DTC), modified DTC (M_DTC) and twelve sectors (12_DTC) have been analysed and compared in order to evaluate the influence of the motor operating condition on steady state performances. A ...