| 摘要 |
PURPOSE:To correct the voltage waveform distortion of a commercial power supply by using the generated output of a simultaneous electrothermal feeder by adjusting the output waveform of the simultaneous electrothermal feeder in order to correct the waveform of commercial supply voltage by the signal of a supply-voltage waveform detecting section and supplying the commercial power supply with the adjusted output waveform. CONSTITUTION:The output signal of a waveform adjusting section 7 is input to a PWM inverter control-signal generating section 8, and the control-signal generating section 8 compares the output signal and an output from a triangular-wave generating section 14 by a signal comparator 15, and generates a PWM inverter control signal driving a pair of opposed switching elements of one of an inverter 3. An inversion equipment 16 inverts the PWM inverter control signal, and produces a PWM signal driving a pair of switching elements of the other. Consequently, PWM inverter control signals driving the four sides of the inverter 3 respectively are generated. A carrier frequency section is subtracted by the action of a filter section 4 in an output from the inverter driven by the signals, and the output is regenerated as a voltage waveform. A section between the lines l1, l2 of a commercial power supply S is supplied with regenerated power by a power injecting section 5. |
