| 摘要 |
A control circuit is provided for use in an electromagnetic device with a coil where the electromagnetic device is actuated with an actuating current and held in an operative condition by a holding current with the holding current being significantly lower in magnitude than the actuating current. The control circuit includes first and second transistors wherein, during a powered mode, the first transistor is disposed in an on state and the second transistor is disposed in an off state, and, during a shorted mode, the first transistor is disposed in an off state and the second transistor is disposed in an on state. Additionally, a power source selectively communicates with the coil, and during a first time interval, the power source communicates with the coil in the powered mode and, during a second time interval, the power source is disconnected from the coil in the shorted mode. Finally, a switching actuator, which communicates with the first and second transistors, operates cooperatively therewith to transition the holding current from a first magnitude to a second magnitude while maintaining the electromagnetic device in the operative condition.
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