| 摘要 |
PURPOSE:To early repair from a trouble by selecting for the control of a power reactor and a power inverter either one of a constant current control, a constant voltage control and a constant marginal angle control and altering the set DC current value of the constant current control in case of the control except the normal selection. CONSTITUTION:A control discriminator 100 discriminates which control angle is selected by comparing the control angle selected by a minimum value selector 90 with the control angle calculated by a constant current controller 80, a constant voltage controller 81 and a constant marginal angle controller 82. A changeover switch 104 switches a set DC current value Idp to a set quasi-DC current value Idp1 by the output signal from the discriminator 100. When the current margin is represented by DELTAIdp, the set quasi-DC current value Idp1 is set to satisfy Idp1> Idp+DELTAIdp. |
