| 摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to vary magnetic fields exerted on a generating coil, thereby variously controlling the characteristics of a permanent magnet generator when current is supplied to a battery or the like using the generator as power supply. SOLUTION: A rectifying and switching circuit 2 comprising bridgeconnected diodes Du-Dw, Dx-Dz and switching elements Fu-Fw, Fx-Fz connected in inversely parallel with the diodes, is placed between a permanent-magnet generator 1 and a load 3. A switching controller 4 which controls the switching elements Fu-Fw, Fx-Fz, so that an alternating-current control voltage with a given phase is applied from the battery B1 contained in a load 3 to the generating coils Lu-Lw through the rectifying and switching circuit 2, is installed. The characteristics of the permanent-magnet generator 1 is variously varied by varying the phase of the alternating-current control voltage.</p> |
