| 摘要 |
PURPOSE: A three-phase rectification control unit is provided to reduce an influence of harmonics and increase a power factor by supplying a constant voltage to a load and correcting the distortion of three-phase rectification. CONSTITUTION: A power input portion(10) receives the three-phase power. An LC filter(20) is used for filtering the frequency width of the three-phase power received from the power input portion(10). A diode rectifier(30) is used for converting the filtered voltage of the LC filter(20) to DC voltage. A control portion(50) detects the output current and the output voltage of the diode rectifier(30) and controls the output waveform of the three-phase power, and outputs a control signal. A switching portion(Q11) is turned on or off according to the control signal of the control portion(50). A load(40) is driven according to the on/off operation of the switching portion(Q11).
|
