Patent ID: 8130482
Filing Date: 2012-03-06
Classification: H01F

Abstract:
1. An electromagnetic actuating device being actuated by AC power and held by DC power, comprising: a power source device; a switching device configured to control said power source device to switch from said AC power output to said DC power output, to allow DC power output of lower voltage from the power source device to be supplied to the driving coil thus allowing DC excited current (Ib) at lower voltage to pass through the driving coil thereby holding electrification for excitation, wherein when the lower voltage DC power is supplied to the driving coil for holding electrification, total current on the driving coil is reduced, while operating characteristics of the electrified electromagnetic actuating device is still ensured by the electromagnetic effective force; wherein a driving coil of electromagnetic actuating device being electrically actuated by AC power input from the power source device to produce a larger electromagnetic actuating force is operatively controlled by the switching device to be switched to allow the driving coil to hold electrification by lower voltage DC power from the power source device for excitation thus reducing total current passing through the driving coil.