| 摘要 |
PURPOSE: To drive an inductive load at a high repeating speed by allowing the first terminals of the primary coil and secondary coil in the coil of a transformer to have the same polarity. CONSTITUTION: A primary side 48 and a secondary side 50 of a transformer 46 have a polarity relation like shown by a figure, that is, black dots adjacent to the coils indicate the end parts of the coils having the same polarity when the primary side is excited. When a switch 44 is closed, currents 45 are allowed to flow through the primary coil 48 and an inductor 52 to the input of an amplifier 26. When the switch 44 is opened, currents 47 having the opposite direction to the input driving currents 45 are allowed to flow to a secondary circuit constituted of the input to the amplifier 26, inductor 52, secondary coil 50, and diode 56 biased to a forward direction at present by the collapse magnetization of the coil of the transformer. Thus, an inductive load can be driven at a high repeating speed. |
