CN201278004Y

CN201278004Y - Chopper experiment system for large power transformer power unit

Info

Publication number: CN201278004Y
Application number: CNU2008200136232U
Authority: CN
Inventors: 蒲延洲; 马惠春; 张可飞; 付强
Original assignee: CNR Dalian Electric Traction R& D Center Co Ltd
Current assignee: CRRC Dalian R&D Co Ltd
Priority date: 2008-06-20
Filing date: 2008-06-20
Publication date: 2009-07-22
Anticipated expiration: 2018-06-20

Abstract

The utility model discloses a chop testing system for a high-power converter power unit, which is characterized by comprising a voltage regulator, a rectifier module, a tested power unit and a pulse trigger, a tested power unit IGBT drive circuit and an adjustable resistance load, wherein the voltage regulator is used for adjusting the strength of input alternating current voltage; the rectifier module is used for converting the input alternating current voltage into direct current voltage and inputting the direct current voltage into a direct current bus of the tested power unit; the pulse trigger is connected to the pulse input end of the tested power unit IGBT drive circuit of an upper pipe or a lower pipe in one of the phases of the tested power unit; and the adjustable resistance load can be connected to the alternating current output end of a corresponding phase and the DC minus or DC plus end of the direct current bus. The testing system has the advantages of convenient use, complete function, safe use and the like and is suitable for being widely popularized in the design field of the converter power units.

Description

High-power converter power cell copped wave pilot system

Technical field

The utility model relates to a kind of ripple pilot system, relates in particular to a kind of high-power converter power cell copped wave pilot system.

Background technology

Current transformer is as the core component of locomotive traction system, and the quality of its performance and reliability are most important indexs of Semiconductor Converting Technology level, we can say that power cell is the carrier of current transformer technology.The design of current transformer power cell comprises the design, overcurrent of the design of structural design, electric insulation, composite bus bar design, IGBT driving circuit and the design of under-voltage protection etc.The copped wave test substantially the most also is one of most important test as current transformer, each enterprises and institutions or R﹠D institution that is engaged in the current transformer technical research has all designed different copped wave pilot systems according to the actual conditions of oneself, concrete test method also is not quite similar, its versatility and can be not strong with reference to property, the utility model is intended to announce a kind of a kind of pilot system and proved recipe method for the reference of research and development testing crew, to improve the design level and the work efficiency of current transformer.

Summary of the invention

The utility model overlaps high-power converter power cell copped wave pilot system scientific and reasonable, that be simple and easy to install at the proposition of above problem and develop one.The technological means that the utility model adopted is as follows:

A kind of copped wave pilot system that is used for the high-power converter power cell is characterized in that comprising: pressure regulator, rectification module, tested power cell, pulse trigger, tested power cell IGBT driving circuit and adjustable resistance load; Described pressure regulator is used to adjust the size of input ac voltage; Described rectification module, change the alternating voltage of pressure regulator input into DC voltage after, be input on the dc bus of tested power cell; Described pulse trigger is connected on wherein the going up pipe or down on the pulse input end of the tested power cell IGBT driving circuit of pipe, the adjustable resistance load is connected on the DC-or DC+ end of the ac output end of corresponding phase and dc bus an of phase of tested power cell.Described pulse trigger constitutes a pulse producer that output duty cycle is adjustable by the NE555 chip design.

Owing to adopted technique scheme, the high-power converter power cell copped wave pilot system that the utility model provides, have system support scientific and reasonable, install simple and easyly, and characteristics such as easy to detect and safe in utilization are suitable for extensively promoting at the design field of current transformer power cell.

Description of drawings

Fig. 1 is an electrical schematic diagram of the present utility model;

Fig. 2 is a pulsed flip-flop circuit schematic diagram of the present utility model.

Among the figure: 1, pressure regulator; 2, rectification module; 3, tested power cell; 4, pulse trigger; 5, tested power cell IGBT driving circuit; 6, adjustable resistance load.

Embodiment

As shown in Figure 1, this pilot system comprises: pressure regulator 1, rectification module 2, tested power cell 3, pulse trigger 4, tested power cell IGBT driving circuit 5 and adjustable resistance load 6; Wherein pressure regulator 1, is used to adjust the size of input ac voltage; Rectification module 2, change the alternating voltage of pressure regulator input into DC voltage after, be input on the dc bus of tested power cell 3; Pulse trigger 4 is connected on wherein the going up pipe or down on the pulse input end of the tested power cell IGBT driving circuit 5 of pipe, adjustable resistance load 6 is connected on the DC-or DC+ end of the ac output end of corresponding phase and dc bus an of phase of tested power cell 3.

Be implemented as follows: it still is that three phase rectifier all can that rectification module 2 utilizes single-phase rectifier, key point is that the DC voltage that goes out of rectification is adjustable, for next step test is provided convenience, electric connecting relation according to Fig. 1 is prepared pilot system, testing with the upward pipe VT1 to the U phase is that example describes, pulse trigger 4 is connected on the driving circuit of VT1, on the U end that adjustable resistance load 6 is connected on ac output end and the DC-end of dc bus, promptly be connected in parallel on the CE two ends of VT2 pipe, control the drive signal of VT1 like this, VT1, adjustable resistance load 6 just constitutes a complete loop with direct supply, just can observe relevant various performance parameters with VT1, test contents mainly comprises the CE both end voltage waveform of VT1, the voltage variety time when the CE both end voltage of essential record VT1 is opened and turn-offed, service time and turn-off time; Current waveform by observation VT1; can determine its current protection value; can obtain needed current value by adjusting middle dc voltage and adjustable resistance load; whether the DC master row design that can also clearly find out entire circuit by above comprehensive parameters is reasonable; the purpose of whole like this copped wave test just all reaches, and plays the vital role of checking design, guidance design.Can adopt in a like fashion for the IGBT on other several roads and to test.

Pulse trigger 4 utilizes the NE555 chip to be core, carries out the pulse that specific design is made just exportable electric signal and two kinds of forms of light signal according to Fig. 2, mainly is that the difference according to the CPU output signal designs, and satisfies the needs of different situations.

The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection domain of the present utility model.

Claims

1, a kind of copped wave pilot system that is used for the high-power converter power cell is characterized in that comprising: pressure regulator (1), rectification module (2), tested power cell (3), pulse trigger (4), tested power cell IGBT driving circuit (5) and adjustable resistance load (6);

Described pressure regulator (1) is used to adjust the size of input ac voltage;

Described rectification module (2), change the alternating voltage of pressure regulator input into DC voltage after, be input on the dc bus of tested power cell (3);

Described pulse trigger (4) is connected on wherein the going up pipe or down on the pulse input end of the tested power cell IGBT driving circuit (5) of pipe, adjustable resistance load (6) is connected on the DC-or DC+ end of the ac output end of corresponding phase and dc bus an of phase of tested power cell (3).

2, the copped wave pilot system that is used for the high-power converter power cell according to claim 1 is characterized in that described pulse trigger (4) constitutes a pulse producer that output duty cycle is adjustable by the NE555 chip design.