Implementation of a matrix converter using p-channel MOS-controlled thyristors

We have constructed a 3-phase to single-phase matrix converter using p-channel MOS-controlled thyristor switches rated at 1200 volts and 300 amperes. Advantages of matrix converters over the more conventional DC-link converters potentially include elimination of the large reactive power components used in the DC link, bi-directional operation permitting regeneration, and increased system lifetime and higher temperature operation realized by the elimination of temperature-sensitive electrolytic capacitors. Snubberless operation is implemented in our matrix converter using semisoft current commutation. Switching frequencies in excess of 3 kHz are readily achievable and operation up to 208 V(rms) (3-phase) has been demonstrated in a laboratory prototype.