| 摘要 |
PURPOSE:To shorten a response time and to attenuate a harmonic voltage, by making an inverter bridge to be operated every half cycle with the current increasing based on the inverter mode and the current decreasing based on the fly-wheel mode. CONSTITUTION:One 2A of the two series switching element pair 2A, 2B of the inverter bridge 2 is controlled by the first control circuit 31 which outputs H level or L level trigger pulse corresponding to the plus or minus half wave of the AC line voltage respectively. The other series switching element pair 2B is controlled by the second control circuit 41 which takes an actual error signal for the reference of AC output current as a trigger pulse by latching it at the leading edge of the clock pulse. |
