Inverter circuit and control method for same

A control method and inverter technology, applied in the direction of high-efficiency power electronic conversion, irreversible DC power input conversion to AC power output, electrical components, etc., can solve the problems of large power consumption and low energy conversion efficiency, and achieve reduction The effect of energy loss

Active Publication Date: 2012-09-19
HUAWEI DIGITAL POWER TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The switching elements used in the inverter circuit in the prior art are hard switches, resulting in excessive po

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  • Inverter circuit and control method for same
  • Inverter circuit and control method for same
  • Inverter circuit and control method for same

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[0045] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0046] In view of the hard switching of the switching elements in the inverter circuit in the prior art, which is likely to cause excessive losses in the process of converting direct current to alternating current, the embodiment of the present invention provides an inverter circuit and a control of the inverter circuit. The method ca...

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Abstract

The invention provides an inverter circuit and a control method for the inverter circuit, wherein the inverter circuit comprises a direct-current source, an alternating-current circuit and more than one inverter bridge; the inverter bridge comprises a first bridge arm and a second bridge arm; the first bridge arm is respectively connected with the positive pole and the negative pole of the direct-current source; the second bridge arm is respectively connected with the positive pole and the negative pole of the direct-current source; the first bridge arm and the second bridge arm are arranged in parallel; the first bridge arm comprises a first switch element group and a second switch element group connected in series; the second bridge arm comprises a third switch element group and a fourth switch element group connected in series; and the alternating-current circuit comprises a first alternating-current source and a first capacitor connected in parallel, or comprises a first alternating-current load and a first capacitor connected in parallel. The technical scheme provided by the embodiment of the invention can realize soft switching in the inverter circuit.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an inverter circuit and a control method for the inverter circuit. Background technique [0002] The inverter circuit is a circuit that converts direct current into alternating current, and is also a circuit that converts direct current energy into alternating current energy, which includes an output alternating voltage form, such as an uninterruptible power supply; and a circuit that outputs alternating current following an external alternating voltage Forms, such as solar grid-connected inverters, wind grid-connected generators, etc. [0003] In the existing inverter circuit, in order to convert DC energy into AC energy during use, it is necessary to perform high-frequency switching on the switching elements in the inverter circuit. Due to the different switching losses generated by switching elements during the switching process of switching on and off, switches can...

Claims

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Application Information

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IPC IPC(8): H02M7/48
CPCY02B70/1491H02M2007/4815H02M7/48H02M7/53871H02M2001/0058H02M1/0058H02M7/4815Y02B70/10
Inventor 张彦忠
Owner HUAWEI DIGITAL POWER TECH CO LTD
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