Power supply apparatus and methods with power-factor correcting bypass mode
First Claim
1. A power supply apparatus, comprising:
- an AC input configured to be coupled to an AC power source;
an AC output;
an AC/DC converter circuit having an input coupled to the AC input;
a DC/AC converter circuit coupled between an output of the AC/DC converter circuit and the AC output; and
a bypass circuit operative to establish a coupling between the AC input and the AC output in a first state and to interrupt the coupling in a second state, wherein the AC/DC converter circuit is operative to control current at the AC input when the bypass circuit is in the first state.
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Accused Products
Abstract
A power supply apparatus, such as an uninterruptible power supply, includes an AC input configured to be coupled to an AC power source and an AC output. The apparatus also includes an AC/DC converter circuit, e.g., a boost rectifier circuit, with an input coupled to the AC input. The apparatus further includes a DC/AC converter circuit, e.g., an inverter circuit, configured to be coupled between an output of the AC/DC converter circuit and the AC output. A bypass circuit is operative to establish a coupling between the AC input to the AC output in a first (e.g., bypassed) state and to interrupt the coupling in a second (e.g., “on line”) state. The AC/DC converter circuit is operative to control current at the AC input when the bypass circuit is in the first state. For example, the AC/DC converter circuit may be operative to control current at the AC input to correct a power factor at the AC input port when bypassed, such that the AC/DC converter circuit may act as a line conditioner in the bypassed state.
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Citations
26 Claims
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1. A power supply apparatus, comprising:
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an AC input configured to be coupled to an AC power source;
an AC output;
an AC/DC converter circuit having an input coupled to the AC input;
a DC/AC converter circuit coupled between an output of the AC/DC converter circuit and the AC output; and
a bypass circuit operative to establish a coupling between the AC input and the AC output in a first state and to interrupt the coupling in a second state, wherein the AC/DC converter circuit is operative to control current at the AC input when the bypass circuit is in the first state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 26)
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14. A power supply apparatus, comprising:
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an AC input configured to be coupled to an AC power source;
an AC output; and
an AC/AC converter circuit including a rectifier circuit coupled to the AC input, wherein the rectifier circuit is operative to control a power factor at the AC input when the AC input is directly coupled to the AC output. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of operating an AC power supply comprising an AC/AC converter circuit configured to be coupled between an AC input and an AC output and operative to generate an AC voltage at the AC output from an AC power source at the AC input, the AC/AC converter circuit including an AC/DC converter circuit coupled to the AC input, the method comprising:
directly coupling the AC input to the AC output while controlling a power factor at the AC input using the AC/DC converter circuit. - View Dependent Claims (25)
Specification