| 摘要 |
PURPOSE:To obtain stabilization and long life of the rotating force control device by only setting a rotating force setter which generates a rotating force setting signal thereby obtaining the arbitral constant rotating force without regard to the rotating speed. CONSTITUTION:A bias signal Vi is variably set by a bias setter 11 so as to corresponds to an exciting electric power. The bias signal Vi is supplied to an adder 12, a signal Vp is added to the adder 12, and the resultant signal is further supplied to an operation amplifier 10. A compensation circuit for an exciting impedance is provided in this way. Since the bias setter 11 is previously adjusted in this way, the effective electric power resulted from said bias signal Vi is always added and supplied to the motor 3. |
