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A power conversion system configuration based on a 20 kHz single-phase voltage link is proposed for systems having distributed power requirements. The proposed configuration permits flexibility in the choice of voltage levels in the system without the penalty of bulky magnetic components, has fast system response, high efficiency, and freedom from acoustic noise, and provides a high degree of uniformity and ease of implementation. A zero-voltage switching pulse-density-modulated converter is proposed as the basic interface converter. It is shown that the technique of pulse-density-modulation allows low distortion synthesis of fixed- or variable-amplitude DC and fixed- or variable-frequency, single- or three-phase AC from the half-cycle pulses of the link voltage. A breadboard system has been built to experimentally verify the models and to complement the theoretical work.>
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Sood et al. (1988) studied this question.
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