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Control method for optically-coupled isolation vehicle power supply photovoltaic inverter

A technology of photovoltaic inverter and vehicle power supply, which is applied in the direction of photovoltaic power generation, electrical components, output power conversion devices, etc., can solve the problems of easy short circuit of vehicle power switch, and achieve the effect of reducing impact, simple topology and avoiding short circuit

Inactive Publication Date: 2015-12-02
WUXI EPIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a control method for optocoupler-isolated vehicle-mounted power supply photovoltaic inverters, which solves the problem that the vehicle-mounted power supply switch fails and is easy to short circuit in the prior art

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  • Control method for optically-coupled isolation vehicle power supply photovoltaic inverter
  • Control method for optically-coupled isolation vehicle power supply photovoltaic inverter

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Embodiment Construction

[0030] The structure and working process of the present invention will be further described below.

[0031] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein explain.

[0032] A control method for an optocoupler-isolated vehicle-mounted power supply photovoltaic inverter, the inverter includes first to fourth switching circuits, first to second filter inductors, an energy storage capacitor, and first to second freewheeling circuits , wherein the first switch circuit and the third switch circuit...

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Abstract

The invention discloses a control method for an optically-coupled isolation vehicle power supply photovoltaic inverter. The inverter comprises a first switching circuit, a second switching circuit, a third switching circuit, and a fourth switching circuit, and control terminals of the switching circuits are connected with an optically-coupled isolation circuit. The method includes: firstly, in the positive half-circle for outputting current, the third switching circuit, the fourth switching circuit, and a second free-wheeling circuit are controlled to always maintain the turn-off state, a first free-wheeling circuit is controlled to always maintain the turn-on state, the optically-coupled isolation circuit is controlled to maintain the same time sequence with the switching circuits, and same-direction or reverse turn-on of signals is controlled; and in the negative half-circle for outputting current, the first switching circuit , the second switching circuit, and the first free-wheeling circuit are controlled to always maintain the turn-off state, and the second free-wheeling circuit is controlled to always maintain the turn-on state. By employing the method, only two switching devices are controlled to simultaneously perform high-frequency switching so that the switching loss is reduced; and the current only flows through two devices during energy output so that the conduction loss is reduced.

Description

technical field [0001] The invention relates to a control method for a photovoltaic inverter of an optocoupler-isolated vehicle power supply, which belongs to a direct current / alternating current (DC / AC) electric energy conversion device. Background technique [0002] Inverters are widely used in motor drives, uninterruptible power supplies, induction heating, static var generators and compensators, and active filtering. Traditional inverter circuit topologies include voltage source inverters and current source inverters. [0003] The output AC voltage of the voltage source inverter is lower than the DC bus voltage, so the voltage source inverter is essentially a step-down inverter. In order to realize the function of step-up conversion, an additional step-up conversion circuit needs to be added. The overall structure of the converter is complicated. [0004] The current source inverter is essentially a step-up inverter. In order to realize the function of step-down conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/537
CPCH02M1/092H02M7/537Y02E10/56
Inventor 尤为
Owner WUXI EPIC TECH
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