Title:
POWER CONVERTER
Document Type and Number:
Japanese Patent JPH04331460
Kind Code:
A
Abstract:
PURPOSE: To improve an input power factor by forming a current that flows to an input inductance in nearly the same waveform as the terminal voltage of the input inductance that is connected in series with a power switch. CONSTITUTION: A waveform detection adjustment circuit 251 feeds a control signal to a power switch 207, so that the current waveform of an inductance 205 is maintained to be the same reproduced waveform, that has the same phase as the sinusoidal AC voltage waveform being applied to the series circuit of the inductance 205 and a power switch 207. More specifically, a control signal based on a specific conversion function is fed to a PWM switch drive circuit 241, according to a voltage waveform applied to the inductance 205 which is connected in series with the power switch 207, thus adjusting the duty ratio of the power switch 207, so that the current waveform of the inductance 205 can be maintained to be a sinusoidal waveform and hence improving an input power factor.
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Inventors:
SHIMON FUREIDORIN
UIRIAMU EFU SURATSUKU
JIEIMUSU SHII WADORINTON
UIRIAMU EFU SURATSUKU
JIEIMUSU SHII WADORINTON
Application Number:
JP27491591A
Publication Date:
November 19, 1992
Filing Date:
September 27, 1991
Export Citation:
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
International Classes:
H02M3/28; H02M1/00; H02M1/42; H02M3/335; H02M7/06; H02M7/12; (IPC1-7): H02M3/28; H02M7/06
Domestic Patent References:
| JPS60148375A | 1985-08-05 | |||
| JPS629813B2 | 1987-03-03 | |||
| JPH03207268A | 1991-09-10 |
Attorney, Agent or Firm:
Hirofumi Mimata