ABSTRACT
Square-waveform DC/AC inverters were used before the 1980s. In those equipment, thyristor, gate-turn-off thyristor, and triac could be used in low-frequency switching operations. High-frequency equipment such as power bipolar transistors (BT) and insulated gate BT was produced. The corresponding equipment implementing the pulse-width modulation (PWM) technique has a wide range of output voltage and frequency and low total harmonic distortion. Two DC/AC inversion techniques are popular in this area: PWM technique and multilevel-modulation technique. Most DC/AC inverters are PWM DC/AC inverters in different prototypes. The PWM technique is deferent from pulse-amplitude modulation and pulse-phase modulation technique. Implementing this technique, all pulses have adjustable pulse width with constant amplitude and phase. The carrier-based PWM technique is applied in the three-phase full-bridge Current source inverter. The main objective of the static power converters is to produce AC output current waveforms from a DC current power supply.
