| 摘要 |
PROBLEM TO BE SOLVED: To prevent an operation circuit of an electromagnetic switching device from such a trouble that an induction current flowing in a reversed direction against the direction of a current flowing through a coil at an exciting side is generated at a non-exciting side coil by a magnetic coupling, and a magnetic flux necessary for driving is cancelled and generation of driving force is obstructed, when discharging by each pole-opening coil connected to a capacitor in parallel and discharging switch serially connected to respective pole-opening coils. SOLUTION: A means, restraining an overcurrent generated when breaking an exciting current flowing through a coil at one side, and breaking an induction current generated at the coil at one side when exciting a coil at the other side, is connected to the operation circuit of the electromagnetic switching device having a pair of coils for pole opening and closing, constructed so that a movable piece moves between the coils. COPYRIGHT: (C)2005,JPO&NCIPI
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