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Multistage direct current circuit with controllable voltage

A technology of DC circuit and rectifier circuit, which is applied in the direction of irreversible AC power input conversion to DC power output, DC power input conversion to DC power output, electrical components, etc. It can solve the problems of low support power level and achieve high power level. , Simple structure, no need for complex control effect

Inactive Publication Date: 2014-02-19
上海寰晟新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, a DC-DC circuit is disclosed, which has a high boosting capability and requires three power sources: a DC voltage source, two pulse signals with phase shifts, and supports a lower power level.

Method used

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  • Multistage direct current circuit with controllable voltage

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0033] like figure 1 As shown, this embodiment provides a multi-level DC circuit with controllable voltage, including a rectification circuit 1 and an inverter circuit 2, wherein the rectification circuit 1 is composed of six or more stages of rectification units connected in series. The rectifier circuit 1 inputs two AC square wave voltages and outputs one DC voltage. The inverter circuit 2 inputs a DC voltage, and outputs two frequency-adjustable AC voltages through a high-frequency isolation t...

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Abstract

The invention discloses a multistage direct current circuit with controllable voltage and belongs to the technical field of power electronics. The multistage direct current circuit with controllable voltage comprises a rectifying circuit and an inverter circuit, wherein the rectifying circuit is composed of six rectifying units and a follow current unit, the six rectifying units are sequentially connected in series and based on reverse conducting switches, two paths of alternating current square wave voltages are input into the rectifying circuit, and a path of direct current voltage is output by the rectifying circuit. The direct current voltage is input into the inverter circuit, two paths of alternating current voltages with adjustable frequencies are output through a high frequency isolation transformer, and power is supplied to the rectifying circuit at the following stage. The multistage direct current circuit with controllable voltage has the boost function and the electrical isolation function, the more the number of stages is, the higher the class of the output direct current voltage is, and the multistage direct current circuit with controllable voltage has the advantages of high in boost performance, simple in structure, low in cost, high in power level and the like.

Description

technical field [0001] The present invention relates to an AC-DC converter in the technical field of power electronics, in particular to a voltage-controllable multi-stage DC circuit, that is, a higher DC voltage output booster circuit. Background technique [0002] With the development of power electronic conversion technology, there have been many DC power supply occasions that require high voltage DC voltage, such as laser power supply, ozone generator, plasma cutting machine arc starter, etc. [0003] Up to now, the composition of the boost circuit that supports higher power output generally includes the following two types: (1) active or passive schemes that use inductive devices and transformers to boost voltage; source or passive solution. The former has limited boosting capability, while the latter needs to consider the output voltage equalization of the converter. Each has advantages and disadvantages, but what they have in common is that the circuit structure is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/25
Inventor 渠浩杨喜军
Owner 上海寰晟新能源科技有限公司
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