Inverter topologies and control techniques for sinusoidal output power supplies

The author reviews the state of the art in terms of power converter topologies and control techniques for realizing sinusoidal output systems. In terms of control strategy, the use of a variety of pulsewidth modulation (PWM) techniques have been proposed for realizing small filter size and good spectral performance. Some of the more popular techniques prevalent in industry are of potential importance and are reviewed. Alternatives for single and polyphase systems are examined. A variety of topologies are seen to be suitable, including conventional PWM inverters, soft switching resonant link inverters, and high-frequency AC link converters. Control strategies which yield output waveforms with good spectral purity, particularly in the presence of nonlinear loads, are examined. Both voltage and current regulator based controllers are seen to be viable alternatives