Inverter circuit and control method for inverter circuit
A control method and inverter technology, which are applied in high-efficiency power electronic conversion, irreversible DC power input conversion to AC power output, electrical components, etc., can solve the problems of high power consumption and low energy conversion efficiency, and reduce The effect of energy loss
Active Publication Date: 2016-03-09
HUAWEI DIGITAL POWER TECH CO LTD
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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 power consumption and low energy conversion efficiency in the process of converting direct current into alternating current
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[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0046] Aiming at the problem that the switching elements in the inverter circuit in the prior art are hard switches, which easily cause excessive loss in the process of converting direct current into alternating current, the embodiment of the present invention provides an inverter circuit and a control system for the inverter circuit The method ca...
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The invention provides an inverter circuit and a control method for the inverter circuit, wherein the inverter circuit includes a DC source, an AC circuit and more than one inverter bridge, and the inverter bridge includes a first bridge arm and the second bridge arm, the first bridge arm is respectively connected to the positive pole and the negative pole of the DC source, the second bridge arm is respectively connected to the positive pole and the negative pole of the DC source, the first bridge arm and the first bridge arm The two bridge arms are arranged in parallel, the first bridge arm includes the first switch element group and the second switch element group connected in series, the second bridge arm includes the third switch element group and the fourth switch element group connected in series; the AC circuit includes the first switch element group connected in parallel An AC source and a first capacitor, or a first AC load and a first capacitor connected in parallel. The technical solutions provided by the embodiments of the present 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...
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IPC IPC(8): H02M7/48
CPCH02M7/53871H02M1/0058H02M7/4815Y02B70/10
Inventor 张彦忠
Owner HUAWEI DIGITAL POWER TECH CO LTD