| 摘要 |
PURPOSE:To perform the regenerative control of a power factor 1 by recovering a DC power source to an AC power source via a bridge circuit having an electric valve and a diode. CONSTITUTION:An arm which is composed of a diode connected in anti-parallel to an electric valve through a reactor 8 from an AC power source 1 is connected to an AC terminal of a transistor bridge 9 connected in 3-phase bridge manner. A smoothing capacitor 5 is connected to the DC side of the bridge 9, a current detector 10 is connected between the capacitor 5 and the DC side of the bridge 9 for detecting the regenerative current to the power source 1. The electric valve of the bridge 9 is controlled by chopper at a control angle alpha=180 deg. (beta=0 deg.) by detecting the phase from the power source 1. |
