This book presents the design of a transformer-less converter for low power applications based on CUK topology which is basically a combination of buck and boost topologies. This topology is principled on dividing the input voltage into storage devices as charging state then delivering the stored energy to the load at the discharging state. This process operated at high speed to ensure continuous conduction of load current. The converter converts input DC voltage throughout multistage voltage chopping. The transfer of energy through the capacitive elements ensures that the load current is...

This book focuses on the torque improvement of the PM BLDC motors by minimizing the generated torque ripples. An extensive review of the applied torque ripple minimization techniques is presented. The torque ripples in BLDC motor drives usually originate from the motor design structure, as well as from the drive side in the forms of current ripples. The torque ripples from the control side appear in the forms of spikes and dips on the output torque which is inherently due to the phase current mismatch during phase current commutation. Practically, the rate of current rise and decay between...