Title:
VARIABLE AUTOMATIC VOLTAGE CONTROLLER
Document Type and Number:
Japanese Patent JPH03296117
Kind Code:
A
Abstract:
PURPOSE:To ensure the high accuracy and high stability regardless of the power factors of a load by outputting the current/voltage via a high frequency filter, a regulator, a current transformer and a high frequency filter and at the same time controlling the output voltage and the switching current through a control part, and outputting these controlled voltage and current to the controller as the PWM signals. CONSTITUTION:The power voltage Vin is outputted to a load 8 set between the output terminals as the output voltage Vout via a high frequency filter 3, a regulator 4, a current transformer 5, and a high frequency filter 6. The voltage Vout and a switching current IL are always detected and controlled by a control part 9 and then outputted to the regulator 4 as the PWM signals. Then the ON time of an AC switch element 4-1 is increased when the voltage Vout is set at a high level or changed to a low level. Meanwhile the ON time of the element 4-1 is shortened when the voltage Vout is set at a low level or changed to a high level, or an excessive output current Iout flows. Thus the voltage is controlled. As a result, the highly accurate and stable output voltage is endured with a compact and inexpensive VV-AVR despite an expected disturbance or accident.
Inventors:
HASEGAWA SUNAO
Application Number:
JP9808590A
Publication Date:
December 26, 1991
Filing Date:
April 13, 1990
Export Citation:
Assignee:
TOKYO RIKOUSHIYA KK
International Classes:
G05F1/45; (IPC1-7): G05F1/45
Domestic Patent References:
| JPS60214023A | 1985-10-26 | |||
| JPS54113844A | 1979-09-05 | |||
| JPS5541552A | 1980-03-24 |
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