Starting circuit for power-converting apparatus
First Claim
1. A power-converting apparatus, capable of holding an output AC voltage at a constant voltage level when a variation in voltage input via an AC power-supply source remains within a predetermined range, the power-converting apparatus comprising:
- a separating means for electrically separating an AC power-supply source from the input terminals of said power-converting apparatus;
an AC/AC converting circuit that initially rectifies AC current input via said AC power-supply source and then causes a capacitor to smooth said rectified current so as to be converted into DC current, and then further converts said DC current into AC current;
a battery; and
a DC/DC converting circuit that enables said capacitor to be charged with a DC voltage delivered from said battery and further enables said battery to be charged with a DC voltage delivered from said capacitor bilaterally or unilaterally.
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Accused Products
Abstract
A power-converting apparatus features the ability to achieve initial charging of a smoothing capacitor generating a minimum rush current by obviating the need for additional series connections in a battery, and also obviating the need for an initial charging circuit consisting of a charging resistor and switch in the capacitor. The power-converting apparatus includes a separating device that electrically separates an AC power-supply source from the input devices of the power-converting apparatus, an AC/AC converting circuit that initially rectifies AC current from an AC power-supply source and then causes a capacitor to smooth the rectified AC current, thereby converting the rectified AC current into DC current before again converting the DC current into AC current, a battery; and a DC/DC converting circuit that enables a capacitor to be charged with DC voltage delivered from the battery, and conversely enables the battery to be charged with a DC voltage delivered from the above capacitor bilaterally or unilaterally.
19 Citations
3 Claims
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1. A power-converting apparatus, capable of holding an output AC voltage at a constant voltage level when a variation in voltage input via an AC power-supply source remains within a predetermined range, the power-converting apparatus comprising:
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a separating means for electrically separating an AC power-supply source from the input terminals of said power-converting apparatus;
an AC/AC converting circuit that initially rectifies AC current input via said AC power-supply source and then causes a capacitor to smooth said rectified current so as to be converted into DC current, and then further converts said DC current into AC current;
a battery; and
a DC/DC converting circuit that enables said capacitor to be charged with a DC voltage delivered from said battery and further enables said battery to be charged with a DC voltage delivered from said capacitor bilaterally or unilaterally. - View Dependent Claims (2)
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3. An apparatus for actuating a power converter capable of holding an output AC voltage at a constant voltage whenever variation of an input voltage of AC power supply source remains within a predetermined range, said apparatus comprising:
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a separating means for electrically separating an AC power supply source from AC power being input to said power converter;
an AC-AC converting circuit, which rectifies AC power of said AC power supply source and smooths said rectified power into DC power via a capacitor and then converts said DC power into AC power, a battery;
a DC-DC converting circuit, which enables said battery to charge said capacitor, and said capacitor to charge said battery; and
a chargeable voltage command arithmetic operation means, which determines a chargeable reserve voltage of said capacitor in response to an actual voltage of said AC power supply source;
wherein, upon receipt of an actuating command, while said separating means remains open, said DC-DC converting circuit charges said capacitor from said battery up to a chargeable reserve voltage predetermined by said chargeable voltage command arithmetic operation means, and then causes said separating means to be closed.
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Specification