In this paper, an adaptive current controller is proposed for variable speed brushless direct (BLDC) motor drives to minimize the output torque ripples caused by parametric and periodically varying uncertainties. Phase-to-phase non-ideal back-electromotive force (back-EMF) in BLDC changes with respect shaft angle, hence period of these signals alters depending on rotor frequency. To address pro...

This Paper mainly deals with the implementation of vector control technique using the brushless DC motor (BLDC). Generally tachogenerators, resolvers or incremental encoders are used to detect the speed. These sensors require careful mounting and alignment, and special attention is required with electrical noises. A speed sensor need additional space for mounting and maintenance and hence incre...

Double-sided permanent magnet linear synchronous machine with 120° phase belt toroidal windings (120°-TWDSPMLSM) suffers from large detent force due to the end effect and slot effect. Many existing methods can reduce of 120°-TWDSPMLSM effectively. But they also minimize back electromotive (back-EMF) thrust simultaneously. To alleviate this problem, paper adopts a method combining slot-shift str...

This article presents a novel power-angle control method of the doubly fed induction generator dc system based on regulating air gap flux vector. The relationship between angle electromotive force (EMF) vector and stator output power is revealed in this article, which can be used for controlling directly. Since frequency determined by rotating speed EMF vector, generated loop that avoid classic...

The search for replacement of commutator and brushes in conventional DC motors by electronic commutator has resulted in a class of Permanent Magnet Brush Less (PMBL) motors. The operation of PMBL motor requires synchronization of coil currents with the instantaneous rotor position. The applied voltages of higher magnitudes must have same zero crossings as that of speed induced back EMF of the r...

Permanent magnet assisted synchronous reluctance motor (PMA-SynRM) is a kind of high torque density energy conversion device widely used in modern industry. In this paper, based on the basic topology PMA-SynRM, novel PMA-SynRM asymmetric rotor with position-biased proposed. The design realizes concentration magnetic field lines air gap to obtain higher electromagnetic torque, and makes both pea...

This paper presents a novel procedure for the emergency sensorless operation of six-phase electric drive. More degrees freedom provided by multiphase technology have been utilized to determine rotor flux position. The proposed technique is based on direct measurement back EMF generated disconnected three-phase winding permanent-magnet synchronous machine (PMSM). method suitable an drive in case...