| 摘要 |
PURPOSE:To reduce a drive current to a small value by dividing and applying the output signal of a pulse generator in synchronization with the zero point of a power source to a motor and the semiconductor switching element of other induction load. CONSTITUTION:The output signal of a zero point synchronizing pulse generator 121 is connected through an AND gate 122 and an inverter 123 to another AND gate 124. When the output terminal to the AND gate 122 becomes HIGH level, the output signal of the AND gate 122 becomes the zero point synchronizing pulse signal, and drives a thyristor 4 through a drive circuit 126a. Similarly, the thyristor 7 is driven through the AND gate 124 and the drive circuit 126a by a sequence control circuit 125. |
