A source voltage clamped resonant link inverter for a discrete time current control

A source voltage clamped resonant link (SVCRL) inverter is proposed to clamp the DC link voltage to the input source voltage and reduce the current rating of a resonant inductor. The current control of a permanent magnet synchronous motor (PMSM) employing a predictive current control technique (PCCT) for the SVCRL inverter is also investigated to overcome the disadvantage of the current regulated delta modulation (CRDM) control technique. By employing the PCCT based on the discrete model of a PMSM and estimation of back EMF, the minimized current ripple with a small number of switchings can be obtained. Finally, the comparative experimental results are given to show the usefulness of the proposed technique.