| 摘要 |
PURPOSE:To enhance the controlling accuracy by discriminating the transient state and the normal state of a motor, and switching the function of a speed regulator in response to the state, thereby preventing the speed after the speed is recovered in the transient state from overshooting. CONSTITUTION:When a speed regulator 16, a torque regulator 20 and a state observing unit 32 for simulating a load torque are provided to control the speed of a motor 26, a switching circuit 34 for discriminating the transient state like a load abrupt variation time and the normal state is provided. To discriminate the transient state and the normal state, a speed deviation (the output of an on adder 14), is, for example, monitored, and when it is the prescribed value or higher, it is discriminated as the transient state. The regulator 16 is controlled to be switched according to the discriminated state, and operates as a P regulator at transient state time and as a PI regulator at normal state time. |
