| 摘要 |
PURPOSE:To provide a method for inexpensively and effectively reducing high harmonic components in input current from an AC power supply with a load system including art inverter as the target. CONSTITUTION:In a vending machine 2 as an example of load system, a power factor improvement device 23 for improving the input current waveform and at the same time input power factor is provided at the input side of a resistor 24 whose input capacity is smaller than that of an inverter 21, a waveform distortion part at art input current IA of the inverter 21 is added or subtracted for compensation by input current IB of the device 23, and art input current IO of the vending machine 2 which becomes the sum of the above current IA and IB is formed in nearly sinusoidal waveform to reduce the high harmonic content. |
