Power conversion apparatus and methods using balancer circuits
First Claim
1. A power conversion apparatus, comprising:
- an input port;
an output port;
first and second busses;
an output circuit coupled to the first and second busses and to the output port and operative to transfer power therebetween;
an auxiliary DC voltage generator circuit operative to generate DC voltages on the first and second busses; and
a multifunction rectifier circuit coupled to the input port and to the first and second busses, the multifunction rectifier circuit operative to generate DC voltages on the first and second busses from an AC power source at the input port when the apparatus is operating in a first mode and to control relative magnitudes of the DC voltages generated by the auxiliary DC voltage generator circuit when the apparatus is operating in a second mode.
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Accused Products
Abstract
A power conversion apparatus, such as an uninterruptible power supply (UPS), includes an input port, an output port, and first and second busses. An output circuit, for example, a half-leg inverter, is coupled to the first and second busses and to the output port and operative to transfer power therebetween. An auxiliary DC voltage generator circuit, for example, a battery converter circuit, is operative to generate DC voltages on the first and second busses. A multifunction rectifier circuit is coupled to the input port and to the first and second busses, the multifunction rectifier circuit operative to generate DC voltages on the first and second busses from an AC power source at the input port when the apparatus is operating in a first mode (e.g., an AC powered operational mode). The multifunction rectifier circuit is operative to control relative magnitudes of the DC voltages generated by the auxiliary DC voltage generator circuit when the apparatus is operating in a second mode (e.g., a battery-powered operational mode). Related power conversion methods are described.
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Citations
39 Claims
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1. A power conversion apparatus, comprising:
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an input port;
an output port;
first and second busses;
an output circuit coupled to the first and second busses and to the output port and operative to transfer power therebetween;
an auxiliary DC voltage generator circuit operative to generate DC voltages on the first and second busses; and
a multifunction rectifier circuit coupled to the input port and to the first and second busses, the multifunction rectifier circuit operative to generate DC voltages on the first and second busses from an AC power source at the input port when the apparatus is operating in a first mode and to control relative magnitudes of the DC voltages generated by the auxiliary DC voltage generator circuit when the apparatus is operating in a second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An uninterruptible power supply apparatus, comprising:
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an AC input port configured to be coupled to an AC power source;
a battery input port configured to be coupled to a battery;
an output port configured to be coupled to a load;
first and second busses;
a half-leg inverter circuit coupled to the first and second busses and to the output port;
a battery converter circuit coupled to the battery input port and the first and second busses; and
a multifunction rectifier circuit coupled to the AC input port and the first and second busses, the multifunction rectifier circuit operative to generate DC voltages on the first and second busses when the apparatus is operating in a first mode and to control relative magnitudes of DC voltages generated by the battery converter circuit on the first and second busses when the apparatus is operating in a second mode. - View Dependent Claims (10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21)
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16. A power conversion apparatus, comprising:
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first and second busses;
a DC voltage generator circuit operative to generate DC voltages on the first and second busses;
an AC output circuit coupled to the first and second busses and operative to generate an AC output voltage from DC voltages on the first and second busses; and
a balancer circuit operative to control relative magnitudes of DC voltages on the first and second busses by selectively coupling the first and second busses to a reference bus via an inductor.
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22. A power conversion method comprising:
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causing a rectifier circuit to produce DC voltages on first and second busses from an AC power source coupled to the rectifier circuit;
producing DC voltages on the first and second busses from a secondary power source; and
operating the rectifier circuit to control relative magnitudes of the DC voltages produced from the secondary power source. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A power conversion method comprising:
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producing DC voltages on first and second busses from a power source;
selectively coupling the first and second busses to a reference bus via an inductor to control relative magnitudes of the DC voltages; and
producing an AC output voltage from DC voltages on the first and second busses. - View Dependent Claims (31, 32, 33, 34, 36, 37, 38, 39)
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35. A power conversion apparatus comprising:
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means for producing DC voltages on first and second busses from a power source;
means for selectively coupling the first and second busses to a reference bus via an inductor to control relative magnitudes of the DC voltages; and
means for producing an AC output voltage from DC voltages on the first and second busses.
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Specification