Theory and analysis of a new power converter with center-tap reactor circuit

In the previous work, the authors stated that the performance characteristics of the power converters with the bridge-core circuit or with the bridge-connected reactor circuit which have been made by us are essentially the same as that of the parametric transformer 2,3,4. A good constant voltage characteristic of it is due to the constrained conditions in the magnetic bridge circuit formed in the magnetic cores. In this paper, the performance characteristics of the center-tap reactor circuit which has been derived from the bridge-connected reactor circuit are stated in details. Its performances are divided into four modes, and with each mode the experimental results are compared with those obtained by the computer calculations. As the results of these calculations, the optimum values of the circuit constants are obtained, and the limiting conditions of characteristics are clarified. Moreover, a new power converter has been derived from the above considerations. In the new power converter, one of the reactors in the center-tap reactor circuit is replaced by the parallel ferro-resonance circuit. This small alteration provides the increase in the output power and smaller voltage regulation in the load characteristic.