The main purpose of this paper is to describe the four-switch brushless dc (BLDC) motor drive for varoius applications. For effective utilization of the developed system, a novel direct current controlled pulse width modulation scheme is designed and implemented to produce the desired dynamic and static speed–torque characteristics. Also, t h e feasibility of the four-switch converter. Keywords...

In this paper, the concept and implementation of field-orientation control (FOC) of a doubly excited brushless reluctance machine (DEBRM) for variable-speed drives and generating systems are presented. A stator-flux-orientation scheme is employed to achieve decoupled control of torque and reactive power. A 2-hp DEBRM prototype system with a digital signal processor (DSP)-based controller and a ...

The Current Source Inverter technology is well suited for medium voltage induction motor drives. Because the CSI drive generally features simple converter structure, motor friendly waveforms, inherent four-quadrant operation capability and reliable fuse less short circuit protection. The main draw back lies in its dynamic torque response. An improved Direct Torque Control method is proposed her...

This paper presents the overall review of torque ripple reduction techniques in brushless DC motors (BLDC) and different multilevel inverter topologies suitable for BLDC motor drives. BLDC motors are widely used for household applications due to its features of high reliability, simple frame, high efficiency, fast dynamic response, compact size and low maintenance, etc.. The switches are electr...

The low-RPM Torque Converter (LRTC) is a rotating generator concept for use on the seabed with driving force from sea waves motion surface. This built up of two identical generators connected opposite each other via spring drum built-in ball bearing clutch. to buoy surface wire, wire rolled around drum. With waves, moves either upwards or downwards and pulls downwards. movement causes spin.&#x0...

The torque ripple of a switched reluctance motor (SRM) limits its application in electric vehicles. This paper proposes DITC system for SRMs based on novel multilevel converter (MLC), which aims at the problem that cannot be effectively suppressed conventional direct instantaneous control (DITC) an SRM due to limitation DC bus voltage asymmetric half-bridge (AHBC) and single strategy formulated...