Title:
POWER SOURCE
Document Type and Number:
WIPO Patent Application WO/1984/000086
Kind Code:
A1
Abstract:
An input terminal of a PWM converter (1) is connected via a reactor L to an AC power source AC, and a capacitor C and a load (11) are conected to a DC output terminal of the converter (1). The apparent phase of a power source voltage E is altered in response to the difference between a DC voltage VO detected across the capacitor C and a command voltage VS, and a control signal from the converter (1) is shaped with the altered voltage as a reference. When the detected voltage VO is larger than the command voltage VS, the converter is controlled to operate with a delay power factor, and the AC voltage V at the input terminal of the converter (1) becomes smaller than the power source voltage E. As a result, the DC voltage VO can maintain a value smaller than the command voltage VS.
Inventors:
OKUYAMA TOSHIAKI (JP)
KUBOTA YUZURU (JP)
KUBOTA YUZURU (JP)
Application Number:
PCT/JP1983/000197
Publication Date:
January 05, 1984
Filing Date:
June 17, 1983
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02M7/12; H02M7/155; H02M7/162; (IPC1-7): H02M7/75
Foreign References:
| JPS5594583A | 1980-07-18 |
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