APPLICATION OF STATE-FEEDBACK WITH INTEGRAL CONTROL TO PULSE-WIDTH MODULATED PUSH-PULL DC-DC CONVERTER

The well-known state feedback with integral control is applied to the multioperating point pulse-width modulated push-pull DC-DC convertor. A new large-signal circuit model of the power stage is modified so tha t the load resistance is eliminated from the system matrix. Two closed -loop continuous-conduction mode push-pull convertors are designed usi ng a pole-placement technique: (a) a conventional convertor with a dio de rectifier and (b) a convertor with a small inductor and a bidirecti onal power flow. The large-signal dynamic performance of these convert ors is investigated by simulations in the time domain. It was found th at the state feedback with integral control in the bidirectional power -flow convertor is suitable for switched-load applications, e.g. radar systems, dot-matrix printers, and power supplies for random-access co mputer memories.