| 摘要 |
PURPOSE:To obtain a rapid operation time of an electromagnet for a solenoid valve and the like by providing a hold circuit of operation to each electromagnet connected to a selection switch in series and a plurality of the electromagnets are connected to an inductance in parallel. CONSTITUTION:Each electromagnet 1 is connected in parallel to the second switch 5 and a switch 9 for determining a holding time through a diode 10 to prevent a back flow of transient current. In the case of operating the electromagnet 1-1, when the switch 5-1 is closed and the first switch 3 is opened, the transient current flows to the electromagnet 5-1. Soon after the operation, the first switch is closed again and the switch 5 is opened. However, after this, the rated current flows in the electromagnet 1-1 through the holding switch 9-1 and the electromagnet leaves as it is operated. Thus, a plurality of electromagnets can be operated rapidly in order by flowing the current through the electromagnets having inductances rapidly. |
