JPS62204307U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an embodiment of a drive circuit for a polarized electromagnet according to this invention, and Fig. 2 is a relationship between the operating states of the main circuit elements and the current flowing through the solenoid in the circuit diagram of Fig. 1. 3 and 4 are circuit diagrams showing other embodiments of the drive circuit for the polarized electromagnet according to this invention, and FIGS. 5 and 6 are circuit diagrams showing the opening/closing This is a time chart for explaining the relationship between the repeated opening and closing operations of the switch at short intervals and the current flowing through the solenoid. L... Solenoid (electromagnetic coil), E... DC power supply, S... Open/close switch, C1... Capacitor, T
1...Transistor (first electronic switch), T2...
Transistor (second electronic switch), M...switch control circuit.

Claims (1)

[Scope of utility model registration request] A DC power source is connected to a series connection circuit of an electromagnetic coil and a capacitor via an on-off switch, and while this on-off switch is closed, charge is accumulated in the capacitor through the coil, and A first electronic switch is provided so that when the open/close switch is opened, the switch becomes conductive and short-circuits the series connection circuit, and the electric charge accumulated in the capacitor at the time of the short circuit causes a current in the opposite direction to that at the time of accumulation. In a drive circuit for a polarized electromagnet that is discharged so that 1. A drive circuit for a polarized electromagnet, comprising a switch control circuit for controlling conduction for only a certain period of time.