CN202748418U

CN202748418U - H-bridge full-power testing device

Info

Publication number: CN202748418U
Application number: CN 201220352812
Authority: CN
Inventors: 冯建云; 庞羽; 张静静; 张铭; 王晓东; 古强; 陈晓东; 李东坪; 张志凯
Original assignee: BEIJING IN-POWER ELECTRIC Co Ltd; BEIJING IN-POWER NEW ENERGY Co Ltd; LANGFANG IN-POWER ELECTRIC Co Ltd
Current assignee: BEIJING IN-POWER ELECTRIC Co Ltd; BEIJING IN-POWER NEW ENERGY Co Ltd; LANGFANG IN-POWER ELECTRIC Co Ltd
Priority date: 2012-07-20
Filing date: 2012-07-20
Publication date: 2013-02-20
Anticipated expiration: 2022-07-20

Abstract

The utility model discloses an H-bridge full-power testing device which is characterized by comprising a tested converter consisting of a rectifying circuit and an H-bridge inversion circuit, a speed-adjustable fan for radiating heat of the tested converter, a load reactor and a unit trigger circuit connected with a gate in an insulated gate bipolar transistor (IGBT) in the H-bridge inversion circuit, wherein the input end of the tested converter, namely the input end of the rectifying circuit, is connected with a power grid through a transformer; and two ends of the load reactor are connected to two ends of the H-bridge inversion circuit. According to the H-bridge full power testing device, the technical problems that the testing energy consumption is high, the required capacity is high, a full-load testing device is complex in structure and the like can be solved.

Description

A kind of H bridge full power proving installation

Technical field

The utility model relates to and a kind of power electronic equipment is carried out the proving installation that power cell carries test entirely.

Background technology

Along with the develop rapidly of Power Electronic Technique, power electronic product is widely used in whole electrical network with the obvious advantage of its stable performance economic benefit.Under this market demand, and the device that the power application electron device forms (hereinafter to be referred as: power electronic equipment) emerge in an endless stream.But power electronic equipment must send the electricity experiment through simulation before dispatching from the factory, the impact of high voltage, large electric current must be accepted in its unit.Therefore in order to reduce owing to the individual elements fault causes unnecessary loss, must guarantee that before powering on each unit can both be qualified up to standard.

At present, carry out the method that power cell carries test entirely and mainly contain following two kinds.

1) energy consumption testing program

Tested current transformer connects motor, and the sending and receiving motor carries out rectification with generator output voltage again, connects at last resistive load.Be characterized in that the equipment of these accesses can cause a large amount of power consumptions when test in complete year.

2) motor unit testing program back-to-back

Structure single line schematic diagram referring to the back-to-back motor unit testing program of Fig. 1, this test method adopts a tested current transformer, one to accompany examination current transformer, two motor M 1, M2, electric energy from electrical network passes to tested current transformer through transformer T1, tested current transformer output connects motor M 1, motor M 1 connects motor M 2 by shaft coupling, motor M 2 outputs connect accompanies the examination current transformer, accompanies examination current transformer output electric energy to be transmitted back to same electrical network or different electrical networks through transformer T2.The advantage of this scheme is: can verify current transformer to the control ability of motor, i.e. the speed adjusting performance of current transformer; Can under different frequency, test current transformer.Its shortcoming is that equipment investment is large, and cost is high, the motor of two 1:1 power need to be arranged and accompany the examination current transformer.

Because the restriction of Power Supplies Condition, for great power conversion circuit equipment, no-load test is only done by some producer, can only carry out on-the-spot load test in site of deployment.

Summary of the invention

The purpose of this utility model provides a kind of H bridge full power proving installation, to solve the technical matterss such as complex structure that the test energy consumption is high, need power supply capacity to carry greatly and full test unit.

In order to realize the foregoing invention purpose, the technical scheme that the utility model adopts is as follows:

A kind of H bridge full power proving installation comprises the tested current transformer that is comprised of with H type bridge inverter main circuit rectification circuit, is adjustable speed blower fan, load reactance device and the unit triggers circuit that is connected with the grid of IGBT pipe in the H type bridge inverter main circuit of tested current transformer heat radiation; The input end of described tested current transformer, namely the input end of rectification circuit is connected with electrical network by transformer, and two of described load reactance device terminates at the two ends of H type bridge inverter main circuit.

Compared with prior art, the utility model has the advantages that:

1, energy is come in by electrical network, by test unit, returns electrical network, only needs less energy supplement, is a kind of completely energy-conservation test;

2, do not adopt motor, greatly simplified the full apparatus structure that carries test;

3, only overcome the limitation that in the abundant situation of power supply capacity, just can entirely carry test, made with what realize large-scale unsteady flow than the power supply of low capacity and entirely carry test and become possibility;

4, testing expenses have greatly been saved;

5, saves energy, the electric energy that test consumes are only carried the 2-3% that test consumes electric energy entirely for traditional current transformer;

6, testing equipment small investment, cost of manufacture is low;

7, wide accommodation.

Description of drawings

Fig. 1 is the structure single line schematic diagram of traditional back-to-back motor unit testing program.

Fig. 2 is the circuit structure diagram of H bridge full power proving installation of the present utility model.

Fig. 3 is that H bridge full power proving installation energy of the present utility model transmits synoptic diagram.

Embodiment

Structure of the present utility model is referring to Fig. 2, described a kind of H bridge full power proving installation comprises the tested current transformer, the adjustable speed blower fan (not shown) for tested current transformer heat radiation, load reactance device L and the unit triggers circuit that is connected with the grid of IGBT pipe VT1-VT4 in the H type bridge inverter main circuit that are comprised of with H type bridge inverter main circuit VT1-VT4 rectification circuit DI-D6; The input end of described tested current transformer, namely the input end of rectification circuit DI-D6 is connected with electrical network by transformer T (not shown), and two of described load reactance device L terminates at the two ends of H type bridge inverter main circuit.This device can two-way four-quadrant operation, namely can obtain direct voltage output at AC; When DC side adds direct supply, can obtain alternating voltage output at AC, not only can rectification but also can inversion.

Energy of the present utility model transmits synoptic diagram, as shown in Figure 3, utilizes rectifier that interchange is converted to direct current, and regulates AC voltage provides required DC voltage for load equipment by transformer; The energy that reactor L operation is produced flows to electrical network through single-phase H type bridge inverter main circuit, dc bus and the PWM rectifier and the filter reactor that are operated in inverter mode.Therefore energy circulation flows, and finally gets back to again electrical network.

This device is a kind of while fictitious load working environment, is equipped with the devices such as adjustable speed blower fan, load reactance device and unit triggers circuit.It can scientifically carry out zero load and fully loaded experiment to the unit, reaches required all technical to guarantee the unit.

This device adopts the rectification of three-phase H bridge, and main devices has IGBT(TV1-TV4), diode (D7-D10).Diode (D7-D10) is protective device, when IGBT turns on and off moment, IGBT is protected, and effectively prolongs the serviceable life of IGBT.Capacitor C 1 forms the DC filtering circuit.IGBT is the full-control type power semiconductor switch, by controlling its switch, calculates its harmonic content.In addition, this device also adopts circuit board that it is controlled comprehensively.

The condition that the test method of this device need satisfy:

1. the output fundamental frequency of device should equate with mains frequency;

2. device output phase sequence is identical with corresponding input phase sequence;

The phasing degree of 3. installing the output current first-harmonic is identical with the phasing degree of line voltage;

4. the size of crossing the control device output current is come the output power of control device;

5. the capacity of electrical network is greater than the loss power of device.

Claims

1. H bridge full power proving installation, it is characterized in that it comprises the tested current transformer that is comprised of with H type bridge inverter main circuit rectification circuit, is adjustable speed blower fan, load reactance device and the unit triggers circuit that is connected with the grid of IGBT pipe in the H type bridge inverter main circuit of tested current transformer heat radiation; The input end of described tested current transformer, namely the input end of rectification circuit is connected with electrical network by transformer, and two of described load reactance device terminates at the two ends of H type bridge inverter main circuit.