Power Electronic Transformer based Three-Phase PWM AC DrivesР”Р„ Transformer is used to provide galvanic isolation and to connect systems at different voltage levels. A PWM controller implementing the optimal feed-forward compensation for buck-boost, Cuk, and SEPIC cells is described and fully experimentally characterized. Rules for the design of PWM controllers and procedures for the evaluation of the hardware-introduced errors are discussed. The aims of achieving zero dc audiosusceptibility was found to be possible for the buck, buck-boost, Cuk, and SEPIC cells for the boost converter, however, only nonoptimal compensation is feasible. The paper describes an analytical procedure to optimize the feed-forward compensation for any PWM dc/dc converters.

Optimal feed-forward compensation for PWM dc/dc converters with 'linear' and 'quadratic' conversion ratioР”В¬alderone, Luigi Pinola, Licia Varoli, Vincenzo Analysis of electromagnetic phenomena in the system: single phase AC network - converter - BLDC motor was carried out.

Waveforms of electrical and mechanical quantities of the designed motor with a high pressure vane pump built in a rotor of the motor were computed. Electromagnetic phenomena analysis in brushless DC motor with speed control using PWM methodР”Р‡ield-circuit model of a brushless DC motor with speed control using PWM method was developed.

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