Abstract
A voltage control system for a reluctance generator with a PWM voltage source converter is proposed. A phasor diagram of the generator is developed by introducing an iron loss conductance. A practical method for achieving optimal efficiency over the complete operating range is suggested. It is based on the optimal-efficiency current angle tracking by adjusting the voltage ratio of AC-to-DC voltage. The performance of the system is investigated by using the new phasor diagram. It is shown that a system with a PWM converter has wider operating range than one with a self-commutated six-pulse converter. The proposed control system is realized on a laboratory prototype, where control routines are mainly implemented by a 16 b single-board microcomputer. Experimental results show that 10% or more improvement compared with that of the system fed by a six-pulse converter is obtained at half full load.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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