Unlock instant, AI-driven research and patent intelligence for your innovation.

Single-input multi-output rectifier and control method

A single-input, multiple-output, control method technology, applied in the direction of DC power input conversion to DC power output, irreversible AC power input conversion to DC power output, control/regulation system, etc., can solve multiple DC voltage unequal, Electric vehicle charging, cascaded PWM rectifiers can not work normally, etc., to avoid uneven output voltage and overcome uneven output DC voltage

Active Publication Date: 2016-07-13
CHINA JILIANG UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the number of electric vehicles borne by each DC output terminal is different, that is to say, the load power levels borne by the DC output terminals are different, in this case, the multiple DC voltages output by the cascaded PWM rectifiers will be unequal
If the output DC voltage cannot reach the voltage equalization state, not only will the cascaded PWM rectifiers fail to work normally, but more seriously, several DC output terminals with too low voltages will not be able to charge electric vehicles normally.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single-input multi-output rectifier and control method
  • Single-input multi-output rectifier and control method
  • Single-input multi-output rectifier and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The realization basis of the present invention is based on a single-input multiple-output rectifier, and the system includes a cascaded PWM rectifier and n DC-DC converters. The cascaded PWM rectifier is composed of n rectification units, and the input terminals of each rectification unit are connected in series. In the two AC branches on the input side of the rectifier unit i (i=1, 2...n), the filter inductance L is connected in series respectively i1 with L i2 . A full control switch S with anti-parallel freewheeling diode i1 , S i2 , S i3 with S i4 An H-bridge topology is formed, and the two input terminals of the H-bridge are respectively connected to the filter inductor L i1 with L i2 One end is connected, and a filter capacitor C is connected between the two output terminals of the H bridge. i .

[0031] In the DC-DC converter i (i=1, 2...n), the fully controlled switch tube K with anti-parallel freewheeling diode i1 , K i2 , K i3 with K i4 An H-bridg...

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

PUM

No PUM Login to View More

Abstract

The invention relates to the electric automobile charging technical field, and aims at providing a single-input multi-output rectifier and control method. The rectifier includes a cascade PWM rectifier and n DC-DC converters; the cascade PWM rectifier is composed of n rectification units, and input terminals of all rectification units are in series connection; the output terminal of each DC-DC converter is used for connecting with a load composed of electric automobiles. The method comprises a cascade PWM rectifier control method and a DC-DC converter control method. The method overcomes the problem of uneven output DC voltage caused by inconsistent loads of each DC output terminal of the cascade PWM rectifier in the prior art, realizes an output voltage sharing state of each charging port under the premise of normal work of the cascade PWM rectifier, and avoids cascade PWM rectifier uneven output voltage and DC-DC converter uneven output voltage caused by DC output terminal load difference in a system operation process.

Description

technical field [0001] The invention relates to the technical field of electric vehicle charging, in particular to a single-input multiple-output rectifier and a control method. Background technique [0002] In order to obtain a DC voltage suitable for charging electric vehicles, a traditional electric vehicle charging station first uses a power frequency step-down transformer to reduce the high-voltage alternating current delivered from a nearby substation to a low-voltage alternating current, and then designs an AC-DC conversion with the help of power electronics technology The converter converts the low voltage AC voltage into the final required DC voltage. Due to the large volume and weight of the power frequency step-down transformer in the traditional electric vehicle charging system, the power density of the system is greatly reduced and the cost is high. In addition, when a large number of electric vehicles are charged at the same time, the AC-DC converter must bear...

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

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02M7/23H02M3/335
CPCH02M3/3353H02M7/23
Inventor 宋春伟郭永洪李梅孙丽宏何金龙
Owner CHINA JILIANG UNIV