| 摘要 |
<p>PURPOSE:To prevent the overcurrent from flowing into a transistor by a method wherein the current flowing into armature is shunted into several reactors and the energy accumulated in the reactors is returned to the armature through the intermediary of flywheel diodes in case the transistors are turned OFF. CONSTITUTION:The current flowing from the battery 1 to the armature 2 is shunted into several reactors 31-33 being subject to chopping by the transistors 4-6. With the transistors 4-6 turned OFF. The current is returned from said reactors 31-33 flywheel diodes 41-43 armature 2 by means of said flywheel diodes 41-43. Through these procedures, the current will not be concentrated in the transistor which will be finally turned OFF even if the transistors are subjected to dispersion while they are turned OFF.</p> |
