QUASI-CURRENT RESONANT DC LINK AC AC CONVERTER/

A new quasi current resonant dc link (QCRDCL) topology has been develo ped in this paper. Although prototype current resonant dc link topolog ies for ac/ac power conversion have had such problems as irregular hig h current peaks, uncontrollable pulse width, etc., this new topology e nables the ac/ac conversion system to have the properties wherein the current peak is limited and the pulse width is adjustable. The system begins to assume an adjustable-width flat-topped current shape, whereb y the system becomes particularly suitable for high power application. With control of the pulse width a very fine load current regulation c an be obtained. In this system, an open loop PWM control has been adop ted and almost the same quality of output waveforms as the conventiona l current source inverter has been achieved.