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Uninterruptible power supply circuit

A power circuit and relay technology, applied in constant current power AC circuits, battery circuit devices, circuit devices, etc., can solve the problems of complex circuit structure, high cost of high-power battery conversion circuits, complex UPS circuit structure, etc., to simplify the circuit. effect of structure

Active Publication Date: 2013-10-23
HUAWEI DIGITAL POWER TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually UPS includes the following parts: rectifier, inverter, charging circuit and discharging circuit, energy storage device, an existing UPS circuit uses the rectifier as the discharge circuit of the energy storage device, but still needs charging circuit, circuit structure Complicated; in another existing UPS circuit, the utility power and the energy storage device use two independent conversion circuits (rectifiers or inverters), in which the charging circuit and discharging circuit of the energy storage device share a set of high-power battery conversion circuit, this kind of UPS circuit requires a high-power battery conversion circuit, which leads to a complicated structure of the UPS circuit, and the cost of the high-power battery conversion circuit is relatively high. In summary, the structure of the existing UPS circuit is complicated

Method used

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] See figure 1 , shows a functional block diagram of a single-phase UPS circuit provided by the present application.

[0055] The UPS circuit includes a bidirectional selector switch 1, a first bidirectional converter 2, a filtering device 3, a second bidirectional converter 4 and an energy storage device 5, and the bidirectional selector switch 1 can be a single-pole double-throw relay, two relays or Two triacs are implemented.

[0056] O...

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Abstract

The invention discloses an uninterruptible power supply circuit, which comprises a bidirectional selection switch, a first-class bidirectional converter, a second-class bidirectional converter, an energy storage device and a filtering device, wherein the bidirectional selection switch is alternatively connected with an alternating-current power supply and the energy storage device; the first-class bidirectional converter is arranged between the bidirectional selection switch and the filtering device; the second-class bidirectional converter is arranged between the filtering device and a load; and both the first-class bidirectional converter and the second-class bidirectional converter have rectifying or inverting functions. Due to the adoption of the bidirectional converters and the bidirectional selection switch, alternating-current mains supply, the energy storage device and a charger needed by the energy storage device can share the bidirectional converters. Compared with the conventional uninterruptible power supply circuit, the uninterruptible power supply circuit disclosed by the invention has the advantage that an additional charger or a high-power inverter is not needed, so that the circuit structure of the uninterruptible power supply circuit is simplified.

Description

technical field [0001] The invention relates to the technical field of uninterruptible power supply, in particular to an uninterruptible power supply circuit. Background technique [0002] At present, only a few areas in my country have solved the problem of power shortage, and most areas and large cities are still facing the problem of power supply shortage, and the quality of power supply cannot be guaranteed, and the city power cannot meet the requirements of electronic equipment that requires high power supply quality. . [0003] UPS (Uninterruptible Power System, uninterruptible power system) came into being. The function of UPS is to replace the mains power supply to provide electric energy for the load when the mains power supply stops. The UPS contains an energy storage device. When the mains power is abnormal or interrupted Next, the UPS continues to supply power to the load by converting the electric energy in the energy storage device through inversion conversion,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02M1/00H02M7/483H02M7/487
CPCH02M1/10H02M7/483H02J7/02H02J9/062H02M7/487H02M7/797H02M1/008H02J5/00H02J3/10
Inventor 崔兆雪
Owner HUAWEI DIGITAL POWER TECH CO LTD
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