Direct voltage splitting circuit supporting multi-level technology

A DC voltage and voltage dividing circuit technology, applied in the direction of irreversible DC power input conversion to AC power output, AC power input conversion to DC power output, electrical components, etc., can solve voltage unit voltage breakdown, capacitor unit Problems such as uneven voltage and uneven voltage, to prevent breakdown by withstand voltage and ensure voltage equalization
CN104767409AInactive Publication Date: 2015-07-08ๆœๅฟƒๆž—
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ๆœๅฟƒๆž—
Publication Date
2015-07-08
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a direct voltage splitting circuit supporting the multi-level technology. According to a direct voltage equalizing circuit in the multi-level technology, each of two or more voltage units used for sharing direct voltage is connected with a direct current / alternating current exchanger and a high-frequency transformer, the high-frequency transformers of the different voltage units are the same in structure, primary side connection polarities are the same, and auxiliary side same polarities are connected in parallel. Thus, when load voltages of the different voltage units are different, the different voltage units can transmit energy to the different high-frequency transformers through the direct current / alternating current exchangers respectively, energy transmission is carried out between the different high-frequency transformers, and therefore voltage equalizing of the different voltage units can be achieved. Thus, when the load voltage of the different voltage units deviates, voltage equalizing of the voltage units is guaranteed, and withstand voltage breakdown is prevented.
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Description

technical field

[0001] The invention relates to power electronics technology, in particular to a DC voltage divider circuit supporting multi-level technology. Background technique

[0002] The energy-saving effect of medium and high voltage frequency conversion speed regulation is becoming more and more significant, and with the increasing awareness of energy saving and emission reduction, medium and high voltage frequency conversion speed regulation technology has developed rapidly. In the medium and high voltage frequency conversion technology, with the continuous improvement of the withstand voltage level of power devices, the use of multi-level technology for DC voltage input has great potential for development. In the multi-level technology, the DC voltage input unit is generally composed of multiple voltage units, and after the DC input voltage is divided, they are respectively provided to different loads. Currently, multiple voltage units can provide multiple capacit...

Claims

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