| 摘要 |
PURPOSE:To obtain large attracting force at the preliminary period of operation of a plunger without giving an excessive load on a power source circuit and to contrive simplification of the circuit constitution of the titled circuit by a method wherein the discharge of the electric energy accumurated in a capacitor is utilized. CONSTITUTION:When an ON signal S1 is given to the plunger at the time t=t1, switching elements SW1 and SW2 are switched from contact points Xa to Xb, and contact points Ya to Yb respectively. As a result, the discharge circuit l1 of the capacitor C, containing the capacitor C and the plunger PL, is formed. Accordingly, a discharge current is added by the application of the added value (E+Vc) of the prescribed power source potential E from said power source terminal P and the discharge potential Vc of said capacitor C is applied to the plunger PL during the prescribed period in the preliminary driving, and the plunger PL is driven by receiving the supply of a current by the voltage of 2E at maximum. Also, when the discharge of the capacitor is completed at time t=t2, a power source circuit l2 is formed through the intermediary of the diode D2 having the capacitor C as a bypass, and the plunger is driven by an output signal S5 corresponding to the rated voltage E. |
