To perform condensorless inverter control by making the capacity of a capacitor remarkably small even in case that thunder surge is superposed.
A multiphase current supply circuit is equipped with a converter 2, an intervening circuit 3a, an inverter 4, a control circuit 6, and a lightning arrestor 7. A power system 1 is connected via the lightning arrestor 7 to the converter 2, and AC voltage Vin is rectified. The intervening circuit 3a has a capacitor 31 and a bypass 33 connected in parallel with it. In the bypass 33, a diode DS, a resistor RS, and a capacitor CS are connected in series, and the direction of going from the anode to the cathode of the diode DS accords with the direction of going from the high-potential side to the low-potential side of a smoothing capacitor.
SEKIMOTO MORIMITSU
| JPH05316745A | 1993-11-26 | |||
| JPH10136674A | 1998-05-22 | |||
| JPH08280173A | 1996-10-22 | |||
| JP2003017287A | 2003-01-17 | |||
| JPH0639270U | 1994-05-24 | |||
| JPH0998576A | 1997-04-08 | |||
| JPH06209574A | 1994-07-26 | |||
| JPH03106881U | 1991-11-05 |
Yoshitake Hidetoshi
Takahiro Arita
Tomohiro Fukuichi
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