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Bidirectional DC-AC converter and control method thereof

A DC-AC, control method technology, applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc., can solve the problems of low efficiency, high cost, low power density of uninterruptible power supply, etc. Achieve the effect of reducing cost, large charging power and charging current, improving power density and conversion efficiency

Pending Publication Date: 2019-07-09
EATON MFG LP GLASGOW SUCCURSALE DE MOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing DC-DC converter, inverter and charger are three separate devices
The resulting uninterruptible power supply has lower power density, lower efficiency and higher cost

Method used

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  • Bidirectional DC-AC converter and control method thereof
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  • Bidirectional DC-AC converter and control method thereof

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Embodiment Construction

[0076] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0077] figure 1 is a circuit diagram of a bidirectional DC-AC converter according to the first embodiment of the present invention. Such as figure 1 As shown, the bidirectional DC-AC converter 1 includes a full-bridge inverter 11 , a transformer Tr, an inductor 14 , a half-bridge AC-AC converter 12 and a control device 17 .

[0078] The full-bridge inverter 11 includes a metal-oxide-semiconductor field-effect transistor (MOSFET) S 1 、MOSFETS 2 、MOSFETS 3 and MOSFETS 4 . where MOSFET S 1 and MOSFETS 2 connected in series between the positive and negative poles of the rechargeable battery 13 and form node A, the MOSFET S 3 and MOSFETS 4 It is connected in series between the positive and negative electrodes of the rechargeable b...

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Abstract

The invention provides a bidirectional DC-AC converter and a control method thereof. The bidirectional DC-AC converter comprises: a full-bridge or half-bridge inverter; a transformer, wherein a primary side of the transformer is connected to an AC end of the full-bridge or half-bridge inverter; an AC-AC converter having a first AC end which is connected to a secondary side of the transformer and asecond AC end which is configured to be connected to a load or an AC power source; and an inductor connected between the primary side of the transformer and the AC end of the full-bridge or half-bridge inverter, or between the secondary side of the transformer and the first AC end of the AC-AC converter. The bidirectional DC-AC converter of the invention has the beneficial effects that: a power density and a conversion efficiency are improved, and cost is reduced.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a bidirectional DC-AC converter and a control method thereof. Background technique [0002] Uninterruptible power supplies can continuously supply power to loads and have been widely used in various fields. [0003] In the existing uninterruptible power supply, it usually includes a DC-DC converter, an inverter and a charger. Among them, in the battery mode, the direct current of the rechargeable battery is converted into the required alternating current through the DC-DC converter and the inverter; in the charging mode, the charger is used to charge the rechargeable battery. [0004] However, the existing DC-DC converter, inverter and charger are three separate devices. As a result, uninterruptible power supplies have lower power density, lower efficiency and higher cost. Contents of the invention [0005] In view of the above-mentioned technical problems existing in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/797
CPCH02M7/797H02M1/0067
Inventor 江添洋李晗冯波忻慧婷罗成
Owner EATON MFG LP GLASGOW SUCCURSALE DE MOR