| 摘要 |
A buck-boost AC/DC converter includes switching elements (206 to 209) that perform full-wave rectification of an AC signal thereby generating a full-wave rectified signal and perform a buck operation, switching elements (212, 213) for performing a boost operation, a reactor (11), and a control unit (200) that causes the switching elements (206 to 209) or switching elements (212, 213) to selectively perform the buck operation or the boost operation based on PWM operation, to maintain a DC voltage (Vdc) at a constant value. The switching elements (206 to 209, 212, 213) possess FET characteristics, inverse FET characteristics and inverse conductive characteristics. The control unit (200) is further configured to switch a gate-source voltage to be supplied to the switching elements (206 to 209) according to a polarity of the AC signal, thereby causing the switching elements (206 to 209) to perform full-wave rectification. |
