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

Current Source Bidirectional Multipulse Converter Based on Variable Polarity DC Bus

A bidirectional converter and DC bus technology, applied in the direction of reversible conversion equipment, etc., can solve the problem that energy cannot be transmitted bidirectionally, and achieve simple control loop and filter design, reduced volume, and reduced volume Effect

Inactive Publication Date: 2016-01-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to reduce the volume and weight of its magnetic components on the basis of the advantages of simple control and filtering of the traditional current source type multi-pulse inverter, to overcome the shortcoming that its energy cannot be transmitted bidirectionally, and to propose a bidirectional switch tube-based current Source Bidirectional Multi-Pulse Converter

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
  • Current Source Bidirectional Multipulse Converter Based on Variable Polarity DC Bus
  • Current Source Bidirectional Multipulse Converter Based on Variable Polarity DC Bus
  • Current Source Bidirectional Multipulse Converter Based on Variable Polarity DC Bus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] attached figure 1 A schematic structural diagram of the current source bidirectional multi-pulse converter based on the variable polarity DC bus of the present invention is given, including a DC side circuit (1), a reversible three-phase bridge group (3), a multi-pulse transformer (4), A three-phase AC power supply (5) and a control circuit (8). When the system is a 12- or 24-pulse bidirectional converter, it is better to connect a balance reactor (2) between the DC side circuit (1) and the reversible three-phase bridge group (3) to realize the current sharing of each three-phase bridge. The DC side circuit (1) is composed of a filter inductor (9) and a polarity-selectable DC bus circuit (10). The optional polarity DC bus circuit (10) is composed of switching tubes with double-quadrant voltage and single-quadrant current or composite switching tubes to form a single-phase bridge, and the two ends of the DC load are respectively connected to the midpoint of the two brid...

Embodiment 2

[0040] like image 3 As shown, the structure schematic diagram of the isolated 6-pulse bidirectional converter in the present invention. In this structure, no balance reactor (2) is connected between the DC side circuit (1) and the unidirectional three-phase bridge group (3), and the two ends of each three-phase bridge are connected to the same polarity terminals, and then connected to the two ends of the DC side circuit , the midpoints of each bridge arm are sequentially connected to the corresponding interface of the multi-pulse transformer.

Embodiment 3

[0042] like Figure 4 As shown, the self-coupling type 12-pulse bidirectional converter structure of the present invention.

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 provides a current source bidirectional multi-pulse converter based on a variable polarity DC bus, which includes a DC side circuit (1) and a three-phase AC power supply (5), and also includes a unidirectional three-phase bridge group (3 ), multi-pulse transformer (4) and control circuit (8), wherein the DC side circuit (1), unidirectional three-phase bridge group (3), multi-pulse transformer (4), and three-phase AC power supply (5) are connected in sequence; The signal input terminal of the control circuit (8) is connected between the multi-pulse transformer (4) and the three-phase AC power supply (5), and the control terminal of the control circuit (8) is connected to the one-way three-phase bridge group (3) connect. The circuit topology proposed by the invention can realize the bidirectional energy flow of the current source type multi-pulse inverter, directly control the current of the three-phase AC side, the controller and the filter are independent, the design is simple, the reliability is high, and it is suitable for various needs Where multi-pulse converters realize bi-directional energy transmission.

Description

technical field [0001] The invention relates to a current source type bidirectional multi-pulse converter based on a variable polarity direct current bus, which belongs to the category of power electronic conversion. Background technique [0002] The multi-pulse inverter technology uses a phase-shifting transformer to superimpose the output of the multi-phase inverter to eliminate low-order harmonics and make the synthesized waveform approach to a sine wave. It has the advantages of less harmonic content, low switching frequency, high reliability, high efficiency, It has the advantages of strong overload capacity and no additional electromagnetic interference. At the same time, the phase-shifting transformer in the system can also electrically isolate the input and output, which has little pollution to the power grid. Based on the above characteristics, multi-pulse inverter technology is widely used in high-power AC drives, new energy applications and power quality control. ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/72
Inventor 陈乾宏杨鸣强
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS