Low power loss uninterruptible power supply
First Claim
1. An uninterruptible power supply, comprisingan input circuit connected to a voltage input terminal for receiving an input AC voltage and including a boost inductor configured to be charged by an AC current from the voltage input terminal so as to provide a boosted AC voltage;
- a battery;
a rectifier circuit connected to an output terminal of the input circuit for converting the boosted AC voltage or a DC voltage outputted from the battery into an intermediate DC voltage, wherein the rectifier circuit comprises a transistor switch, the boost inductor of the input circuit is charged and discharged by repetitive switching operations of the transistor switch so as to provide the boosted AC voltage, and the rectifier circuit further comprises a choke coil to limit the change rate of the output current of the battery and a battery monitor which is implemented by a Hall effect current sensor connected in series between the choke coil and the battery for detecting a change on an output current of the battery; and
an inverter circuit connected to an output terminal of the rectifier circuit for converting the intermediate DC voltage into an output AC voltage.
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Accused Products
Abstract
The present invention presents an uninterruptible power supply device including an input circuit coupled between a voltage input terminal and a rectifier circuit, in which the input circuit includes a boost choke being charged with an AC current received from the voltage input terminal for providing a boosted AC voltage to the rectifier circuit. The rectifier circuit is configured to convert the boosted AC voltage into an intermediate DC voltage. The intermediate DC voltage is converted through an inverter into a poly-phase output AC voltage for use by a load.
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Citations
17 Claims
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1. An uninterruptible power supply, comprising
an input circuit connected to a voltage input terminal for receiving an input AC voltage and including a boost inductor configured to be charged by an AC current from the voltage input terminal so as to provide a boosted AC voltage; -
a battery; a rectifier circuit connected to an output terminal of the input circuit for converting the boosted AC voltage or a DC voltage outputted from the battery into an intermediate DC voltage, wherein the rectifier circuit comprises a transistor switch, the boost inductor of the input circuit is charged and discharged by repetitive switching operations of the transistor switch so as to provide the boosted AC voltage, and the rectifier circuit further comprises a choke coil to limit the change rate of the output current of the battery and a battery monitor which is implemented by a Hall effect current sensor connected in series between the choke coil and the battery for detecting a change on an output current of the battery; and an inverter circuit connected to an output terminal of the rectifier circuit for converting the intermediate DC voltage into an output AC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An uninterruptible power supply, comprising
an input circuit connected to a voltage input terminal for receiving an input AC voltage, including a boost inductor configured to be charged by an AC current from the voltage input terminal so as to provide a boosted AC voltage and a current transformer connected in series between the voltage input terminal and the boost inductor for measuring the AC current from the voltage input terminal; -
a bus device; a battery connected to the bus device; a rectifier circuit connected to an output terminal of the input circuit for converting the boosted AC voltage or a DC voltage outputted from the battery into an intermediate DC voltage, wherein the rectifier circuit comprises a transistor switch, the boost inductor of the input circuit is charged and discharged by repetitive switching operations of the transistor switch so as to provide the boosted AC voltage, and the rectifier circuit further comprises a choke coil to limit the change rate of the output current of the battery and a battery monitor which is implemented by a Hall effect current sensor connected in series between the choke coil and the battery for detecting a change on an output current of the battery; and an inverter circuit connected to an output terminal of the rectifier circuit for converting the intermediate DC voltage into an output AC voltage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification