| 摘要 |
PURPOSE: To obtain the high speed response and the stability by providing a counterelectromotive force compensator to eliminate a resonance point at a current control system, and largely raising the response of a current controller. CONSTITUTION: An output current feedback Vd is added to the output of a current controller 14 from a counterelectromotive force compensator 20 to a standard control system having a voltage controller 12 and a current controller 14 by an adder 19 to cancel the influence of the Vd by +/- in a current control loop, and a stable control system having no resonance point is conducted. If a load 8 is light and the current is intermittently interrupted, the gain of the compensator 20 is so set to an apparent G(S)=1 by a second voltage controller 22 as to reduce the current flow rate α to control the voltage Vd in response to the current (output current of a rectifier 5) flowing to a smoothing reactor 6, the influence of the voltage Vd is ignored, and a stable control system having no resonance point is conducted. |
