| 摘要 |
A rectification device (100) equipped with: a rectification circuit (4) wherein switch elements (Qa, Qb) are on the two sides adjacent to the side of an AC power source (1) on which a feedback current flows, and the other two sides are rectification elements (Da, Db); an input voltage detector (6); an input current detector (7); and a control circuit (8) that modulates the pulse width to control the switch elements (Qa, Qb) in response to the difference between the input current and an input current target value generated on the basis of a synchronized sine wave synchronized with the input voltage. When the polarity of the input voltage, the input current, or the synchronized sine wave differs from the polarity of the other two, the two switch elements (Qa, Qb) are switched simultaneously. Thus, it is possible to prevent circuit damage in the rectification device and to reduce the power factor even when there is a possibility of short-circuiting in the AC power source due to the operational state of the switch elements. |
