| 摘要 |
PROBLEM TO BE SOLVED: To perform suppression control over a rise in DC intermediate voltage due to disturbance when a load is controlled using an electric power conversion device.SOLUTION: A current estimation section is provided which estimates a detected voltage value in the form of a current value by performing dummy differentiation for suppressing harmonics after differentiating a detected DC intermediate voltage. Further, an LPF is provided which passes a current command for controlling the DC intermediate voltage. A deviation of the current command passed through the LPF from the current estimated value estimated by the current estimation section is estimated as a disturbance value, the disturbance value and current command are added together with opposite polarities and input to a current control section to generate a voltage command, and an output voltage of a forward converter is controlled through a PWM control section. |
