Laminated busbar used for diode clamp type three-level converter

A technology of diode clamping and laminated busbars, which is applied in the field of laminated busbars, can solve problems such as IGBT module damage and system failures, and achieve the effects of reducing turn-off overvoltage, reducing stray inductance, and expanding the safe working area

Inactive Publication Date: 2013-05-15
SHANGHAI ELECTRICGROUP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the stray inductance of the laminated busbar cannot be effectively reduced, the overvoltage generated in th

Method used

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  • Laminated busbar used for diode clamp type three-level converter
  • Laminated busbar used for diode clamp type three-level converter
  • Laminated busbar used for diode clamp type three-level converter

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with accompanying drawing.

[0047] Diode-clamped three-level converters include single-phase three-level circuits, see figure 1 , the single-phase three-level circuit includes first to fourth IGBTs S1-S4, first to fourth capacitors C1-C4, first to second clamping diodes D1-D2, module busbars and DC capacitor busbars, in,

[0048] The module busbar includes the module positive busbar P1, the first module connection busbar P2, the second module connection busbar P5, the module zero busbar P3, the module AC busbar P4 and the module negative busbar P6;

[0049] DC capacitor busbars include capacitor positive busbar P7, capacitor zero busbar P8 and capacitor negative busbar P9;

[0050]The collector of the first IGBT S1 is sequentially connected to the positive terminal (DC positive bus) DC+ through the module positive busbar P1 and the capacitor positive busbar P7; the emitter of the first IGBT S1 is re...

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Abstract

The invention discloses a laminated busbar used for a diode clamp type three-level converter. The laminated busbar used for the diode clamp type three-level converter comprises a module busbar and a direct current capacitor busbar which are mutually connected. The module busbar is divided into five layers, the first layer comprises an alternating current outlet busbar, a module positive busbar and a module negative busbar; the second layer is an insulation layer; the third later is a module zero busbar; the fourth layer is an insulation layer; and the fifth layer comprises a first module connection busbar and a second module connection busbar. The direct current capacitor busbar is divided into five layers, the first layer is a capacitor positive busbar; the second layer is an insulation layer; the third later is a capacitor zero busbar; the fourth layer is an insulation layer; and the fifth layer is a capacitor negative busbar. The laminated busbar used for the diode clamp type three-level converter can reduce stray inductance of a commutation circuit greatly, turn-off overvoltage of devices can be effectively restrained, a du/dt adsorption circuit is eliminated, and the structure is compact while cost is reduced.

Description

technical field [0001] The invention relates to a laminated busbar, in particular to a laminated busbar for a diode-clamped three-level converter. Background technique [0002] In the case of medium and high voltage electric drives, in order to meet the voltage requirements of the system, it is necessary to use multiple power electronic devices in series, and it is difficult to solve the static and dynamic voltage equalization problems of series power electronic devices, thereby reducing the reliability of the entire system . The diode-clamped three-level topology successfully solves the problem of voltage equalization of switching devices, making it possible to apply low-voltage power electronic devices in medium and high voltage converter systems, so it has been widely used in the field of power electronics , and has broad prospects. [0003] The component layout and laminated busbars of the three-level converter are directly related to the overall performance of the sys...

Claims

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Application Information

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IPC IPC(8): H02M7/00H02M7/487
Inventor 张鲁华宋小亮薛兆强吴竞之陈国栋董祖毅
Owner SHANGHAI ELECTRICGROUP CORP
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