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Inverter system

A technology of inverters and controllers, which is applied in the direction of control systems, conversion equipment for converting irreversible DC power input into AC power output, intermediate conversion into DC conversion, etc., which can solve the problem of unfavorable inverter operation , excessive rated voltage and other issues, to achieve the effect of reducing production costs

Inactive Publication Date: 2016-09-28
LSIS CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] However, when the bypass switch is not used at the output terminal of the faulty power unit, the DC link voltage is increased due to the rectification operation of the anti-parallel diode of the power switch used by the faulty power unit, resulting in Excessive rated voltage is generated in the capacitor, whereby, due to damage to the power unit, it may be disadvantageous that the entire operation of the inverter cannot be performed

Method used

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  • Inverter system
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Embodiment Construction

[0028] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some embodiments are shown. However, the inventive concept can be embodied in many different forms and should be construed as limited to the exemplary embodiments set forth herein. On the contrary, the described aspects are intended to embrace all such alterations, modifications and variations that fall within the scope of the present disclosure and novel concepts.

[0029] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0030] figure 1 is a schematic diagram illustrating the principle of series-connected medium-voltage inverters according to an exemplary embodiment of the present disclosure.

[0031] refer to figure 1 , in the system applied to the present disclosure, the inverter 2 converts three-phase input power for line-to-line voltage with an rms (root...

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Abstract

An inverter system is provided. In the inverter system according to the present disclosure, adjacently arranged four switching elements among U phase and V phase switching elements configured in an NPC / H bridge manner are converted to an ON state to bypass a voltage applied from a DC link capacitor.

Description

technical field [0001] Teachings according to exemplary embodiments of the present disclosure generally relate to an inverter system. Background technique [0002] Generally speaking, a medium voltage inverter means an inverter with an rms (root mean square) value of input power greater than 600V, used for line-to-line with a rated power capacity generally ranging from several kilowatts to several megawatts. voltage, and the inverter is typically used to drive high inertia industrial loads such as non-limiting examples: fans, pumps and compressors. [0003] One form of a medium voltage inverter may primarily be a cascaded multi-level series inverter generating output phase voltages greater than 3 levels. In this cascaded multi-level series inverter, the output voltage level and the number of cells are determined by the number of power cells including the multi-level inverter, and each cell uses an insulated The output voltage. [0004] Each phase is formed by connecting m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/44
CPCH02M5/44H02M1/325H02M7/487H02M1/32H02M7/49H02M7/4835H02H7/122H02P27/06
Inventor 崔乘喆俞安橹
Owner LSIS CO LTD
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