| 摘要 |
PROBLEM TO BE SOLVED: To realize continuity by correcting a discontinuous point of a voltage in a DC bus in a conversion device where AC waveforms of one cycle are alternately generated by two circuits.SOLUTION: The conversion device is interposed between a DC power source and an AC power source and comprises: the DC bus which is provided between the DC power source and the AC power source; a first converter which is provided between the DC power source and the DC bus and performs DC/DC conversion; a second converter which is provided between the DC bus and the AC power source and performs DC/AC or AC/DC conversion; and a control part which selectively operates the first converter and the second converter within one cycle of the AC power source, such that a part of an absolute value of an AC waveform and a DC waveform alternately appear as a voltage of the DC bus. The control part adds a compensation value in a positive direction to a voltage target value of the DC bus in the timing when the AC waveform and the DC waveform may come to a mutual linkage discontinuous point.SELECTED DRAWING: Figure 19 |
