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Power converter circuit and method for feeding into the mains from a DC source with a non constant DC

A DC voltage, DC voltage conversion technology, applied in the direction of AC network circuits, circuit devices, high-efficiency power electronics conversion, etc., can solve the problems of low-cost production and other problems

Inactive Publication Date: 2008-02-27
SEMIKRON ELECTRONICS GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The constructional disadvantage of this prior art rectifier circuit is that it must have several constituent elements, so that it cannot be produced cost-effectively

Method used

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  • Power converter circuit and method for feeding into the mains from a DC source with a non constant DC
  • Power converter circuit and method for feeding into the mains from a DC source with a non constant DC
  • Power converter circuit and method for feeding into the mains from a DC source with a non constant DC

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Embodiment Construction

[0015] FIG. 1 shows an example of a circuit structure known in the prior art. The task of this circuit structure is to convert the DC voltage 10 at its input into an AC voltage 20 at its output. In the described solar installation application, the input voltage 10 is generally a direct voltage with a voltage value that is not constant over time.

[0016] In order to increase the input voltage 10 with a large voltage range (for example, 40 V to 200 V for a network with a supply voltage of 230 V) to a constant value for the intermediate circuit 30, this circuit configuration has a known Height adjuster 50. It consists of a switch, which is a transistor 56 with an antiparallel diode 58 , for short-circuiting the input DC voltage of the circuit configuration, with an input inductor 52 and a downstream diode 54 . This produces a DC voltage in the intermediate circuit 30 with a voltage value that exceeds the peak value of the AC voltage to be fed.

[0017] The circuit structure a...

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PUM

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Abstract

The arrangement has an input inductor (20) and an H-bridge (60) with flow-control valves (620, 660, 720, 760) per branch, where each flow-control valve has a switchable forward-biasing and a reverse-biasing. The flow control valves are connected with a capacitor (82) between both branches of alternating current connectors of the H-bridge. The flow control valves have a series arrangement of diodes and transistors . An independent claim is also included for a method for converting non constant direct current into alternating current.

Description

technical field [0001] The invention relates to a rectifier circuit and a corresponding method for supplying an AC network with a peak voltage of, for example, 230 V from a temporally non-constant DC voltage source with swings, for example, between 5 V and 200 V. Such rectifier circuits are used, for example, in solar installations. Here the output power and voltage of the solar facility depend on the intensity of the irradiated light and the number of circuit wiring and photocells. The temporally non-constant DC voltage generated here has to be fed into the AC network by means of a rectifier circuit. Background technique [0002] State-of-the-art rectifier circuits consist, for example, of a step-up regulator, an intermediate circuit with buffer capacitors and a bridge circuit (preferably an H-bridge circuit) with a choke coil and a capacitor between the AC voltage connections composition. [0003] The constructional disadvantage of this prior art rectifier circuit is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M1/12
CPCH02J3/382Y02E10/563H02J3/383Y02B70/12H02M7/5387H02M1/42H02J2300/24H02J3/381Y02B70/10Y02E10/56
Inventor 德简·施赖伯
Owner SEMIKRON ELECTRONICS GMBH & CO KG