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Reconfigurable isolated multilevel converter

A converter and multi-level technology, which is applied in the direction of adjusting electric variables, converting devices for output power, converting DC power input to DC power output, etc., can solve problems such as complex power circuits and control circuits

Inactive Publication Date: 2017-03-15
SHENZHEN AEROSPACE NEW POWER TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from Figure 1 that the number of power switches used is large, so the power circuit and control circuit are relatively complex

Method used

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Embodiment Construction

[0020] specific implementation plan

[0021] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0022] The reconfigurable isolated multilevel converter of the present invention still takes three-level implementation as an example.

[0023] attached figure 2 Shown is a basic series-parallel reconfigurable isolated converter topology unit. V1 and V2 are isolated power supplies, both of which can control the output of the same voltage or the same current. The power switch S1 and the power diodes D1 and D2 constitute a series-parallel switch circuit, and the output voltage and current of the unit are controlled by turning on and off of S1. In one embodiment, the positive pole of D1 is connected to the positive pole of V2, the negative pole of D1 is connected to the positive pole of V1, the positive pole of D2 is connected to the negative pole of V2, the negative pole of D2 is connected to...

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Abstract

The invention provides a reconfigurable isolated multilevel converter, which comprises isolated power supplies V1 and V2, a power switch tube S1, and power diodes D1 and D2, wherein the power switch tube S1 and the power diodes D1 and D2 form a serial-parallel switching circuit, and the output voltage and the current of the unit are controlled through on and off of the S1; the positive electrode of the D1 is connected with the positive electrode of the V2; the negative electrode of the D1 is connected with the positive electrode of the V1; the positive electrode of the D2 is connected with the negative electrode of the V1; the negative electrode of the D2 is connected with the negative electrode of the V1; the source electrode of the S1 is connected with the negative electrode of the V1; the drain electrode of the S1 is connected with the positive electrode of the V2; and the positive electrode of the V1 and the negative electrode of the V2 form positive and negative electrode output ends of the converter respectively. According to the reconfigurable isolated multilevel converter topology, the basic unit is an isolated voltage source unit, serial-parallel connection of the basic unit can be realized at the same time by only one power switch and two diodes, and besides, serial-parallel combinations can be nested with applications, which can be applied to a low-power low-voltage multilevel situation and also a high-power high-voltage situation.

Description

technical field [0001] The invention relates to the technical field of power converters, in particular to a reconfigurable isolated multilevel converter. Background technique [0002] Multi-level converters can generate multi-step, low-distortion voltage waveforms, and are especially suitable for high-power and high-voltage applications. They have the advantages of low switching loss, high efficiency, and low EMI. Multi-level switching conversion technology has been widely used in the field of AC / DC power conversion and DC / AC conversion, while in the field of DC / DC power conversion, multi-level conversion usually requires multiple basic voltage source or current source units and switch matrix Cooperate for series or parallel realization. [0003] In the traditional mode, the realization of multi-level conversion in DC / DC power conversion is realized through the series-parallel structure of the basic power supply unit, and the series-parallel structure is relatively fixed, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02M3/335
CPCH02M3/155H02M3/335H02M3/33576
Inventor 刘青朱洪雨张博温张艺
Owner SHENZHEN AEROSPACE NEW POWER TECH
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