| 摘要 |
PROBLEM TO BE SOLVED: To improve a power factor by making impressed voltage to a switching circuit high with a few number of parts. SOLUTION: It has a power supply circuit which carries out voltage doubler rectification of an AC power supply, a switching circuit which converts this output into high frequency, and a load circuit which consumes this high frequency output. The power supply circuit consists of 1st and 2nd capacitors and 1st, 2nd, 3rd, and 4th diodes which are connected in series, according to normal order polarity. It is constituted that the 1st capacitor negative electrode and the 2nd capacitor positive electrode are connected, and the connecting point of the 1st diode cathode and the 1st capacitor positive electrode is made to the outputting point of the power supply circuit, and the connecting point of the 4th diode anode and the 2nd capacitor negative electrode is made to ground. One end of the AC power supply is connected to the 2nd capacitor positive electrode, and the other end is connected to the 3rd diode cathode. One end of the load circuit is connected to the outputting point of the switching circuit, and between the other end and the 1st diode anode, the 4th diode cathode, the 2nd capacitor positive electrode, the 3rd, 4th, and 5th capacitor are connected, respectively. |
