| 摘要 |
PROBLEM TO BE SOLVED: To stabilize the feedback control of a converter control means by changing the gain in feedback control of the converter control means, based on the DC output voltage or command voltage. SOLUTION: The gain i in a current control loop is changed in inverse proportion to actually detected DC output voltage by a gain changing means 30. Then, in the case of raising or lowering the DC output voltage outputted from a PWM converter device, the gain is changed to a proper value, corresponding to this. Hereby, even in the case of controlling the DC output voltage Vdc, the feedback control of a converter control circuit becomes fully stable one. |
