| 摘要 |
An electromagnetic servo device (200) includes a driving control circuit (100) adapted for, in accordance with an output signal (VR, VL) from a torque detection mechanism (11) for detecting steering torque (Ti) acting on an input shaft (1), providing a first control signal (Vmo), to thereby feed an armature current (Io) of a controlled quantity in a controlled direction, to an electric motor (18) for generating auxiliary torque to be applied to an output shaft (4) and a second control signal (Vcl), to thereby control, an electromagnetic clutch (41) for transmitting motor torque of the electric motor (18) as the auxiliary torque to the output shaft (4). The second control signal (Vcl) has fed back thereto a signal (Vf) according to the actual quantity of the armature current (Io).
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