A high degree of freedom dc/dc converter with automatic current sharing

A technology of converters and degrees of freedom, applied in the direction of converting DC power input to DC power output, output power conversion devices, instruments, etc., can solve the problem of excessive voltage stress of power switches and diodes, reduced energy conversion efficiency, and too many devices And other problems, to achieve high gain output, reduce current stress, reduce the effect of voltage stress
CN106992676BActive Publication Date: 2020-06-09武汉欣远自控工程有限公司
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
武汉欣远自控工程有限公司
Publication Date
2020-06-09

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention provides an automatic current-sharing high-degree-of-freedom DC-CD converter. Compared to a current converter, the number of input phases and the number of gain units are adjustable, the automatic current sharing can be realized after the number of input phases and the number of gain units are changed, and control of lots of sensors and the complex control strategy design are omitted. When the automatic current-sharing high-degree-of-freedom DC-CD converter is applied to different occasions, the number of input phases and the number of gain units can be flexibly regulated, several times of gain are improved through adding one input phase or one gain unit, the ratio of the output voltage and the input voltage is m*n, wherein D is a duty ratio, and m and n are the number of input phases and the number of gain units. The automatic current-sharing high-degree-of-freedom DC-CD converter can satisfy large-scale, high-power and high-gain occasions. Compared to the current high-gain technology, the automatic current-sharing high-degree-of-freedom DC-CD converter has no a coupling inductor or an isolation transformer, and the current stress and the voltage stress of a switch and a diode are reduced so as to improve the whole work efficiency of the converter.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a DC-DC converter, in particular to a high-degree-of-freedom DC / DC converter with automatic current sharing. Background technique

[0002] In the prior art, there are few studies on DC / DC converters used in large-capacity and high-power transmission system applications, and most of them are isolated converters. This type of converter generally adopts the method of changing the turns ratio of the intermediate isolation transformer. To achieve high gain, the resulting complex control strategy and low energy transmission efficiency limit its application in applications such as offshore wind power, and high-frequency transformers are also heavy, occupy a large area, and have high investment costs. Therefore, there is an urgent need for a light and simple large-capacity DC / DC converter that can achieve high gain. At present, there are mainly three types of converters researched for this problem: the first one is to use switched res...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More