CN2672660Y

CN2672660Y - Circuit for producing analogue damping vibration wave

Info

Publication number: CN2672660Y
Application number: CN 200320127260
Authority: CN
Inventors: 郑军奇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2003-12-05
Filing date: 2003-12-05
Publication date: 2005-01-19
Anticipated expiration: 2013-12-05

Abstract

The utility model presents a circuit for producing analogue damping vibration wave, which aims at settling the proir technical problems of the fixed step number of the output pulse electric voltage and of the labile number of oscillations in the waveform. To settle the problems, the solutions of the utility model is: a circuit for producing analogue damping vibration wave, formed from circuits produced respectively by heavy pressure waves, a high voltage switch and a waveform, a pulse generation control circuit and an activation Module. The pulse signal produced by the pulse generation control circuit inputs onto the activation Module, which then issues an actuating signal onto the insulated gate bipolar transistor to break it.

Description

A kind of circuit that produces the simulation damp oscillatory wave

Technical field

The utility model belongs to technical field of measurement and test, is specifically related to a kind of circuit that produces the simulation damp oscillatory wave.

Background technology

The port of electronic electric equipment damp oscillatory wave occurs through regular meeting, and this damp oscillatory wave is to be discharged or produced when switching by the electric arc in power plant, high pressure transformer station and the heavy industry equipment.Reliability when the damp oscillatory wave that electronic electric equipment suffers greatly influences this equipment and system's operation, in order to weigh the bear degree of electronic electric equipment to damp oscillatory wave, need produce damp oscillatory wave by the circuit of simulation damp oscillatory wave, thereby electronic electric equipment is tested the wave of oscillation immunity to interference grade that is reached with assessment apparatus.International standard IEC61000-4-2 has stipulated that electronic electric equipment immunity experiment to damp oscillatory wave under normal running (operation) conditions requires and process of measurement, has stipulated the export technique requirement of simulation damped oscillation wave circuit.Therefore, the circuit of this generation simulation damp oscillatory wave becomes the key of this immunity experiment.

Prior art has proposed a kind of simulation damped oscillation wave circuit, and as shown in Figure 1, it produces circuit by high pressure wave generation circuit, high-voltage switch gear and waveform and forms; This high pressure wave generation circuit is made up of high-voltage power supply U1, charging resistor R1 and storage capacitor C1; This waveform produces circuit and is made up of tank coil L1, filter inductance L2, filter resistance R2, filter capacitor C2; And this high-voltage switch gear S1 adopts the bubble-discharge switch, wherein: this high-voltage switch gear S1 includes single-point stationary contact A, multiple spot moving contact B two parts, single-point stationary contact A is static during operate as normal, multiple spot moving contact B rotation, on the multiple spot moving contact B a lot of contacts are arranged, when the contact on the multiple spot moving contact B and single-point stationary contact A near the time (but not contacting) air breakdown conducting, high-voltage switch gear S1 forms a closure state, thereby forms a damp oscillatory wave.When the next contact on the multiple spot moving contact B and single-point stationary contact A near the time form closedly again, the interlude of secondary closure belongs to switch off state.So repeatedly, can form lasting damp oscillatory wave, this damp oscillatory wave is by source resistance R 3, resitstance voltage divider R4, R5 and monitor port CRO output.

Obviously, above-mentioned prior art has the following disadvantages:

1, Shu Chu pulse voltage shelves number is fixed as several grades usually, as 1.0KV, 1.5KV, 2.0KV, 2.5KV and 3.0KV; It is owing to adopt the mode of air gap breakdown discharge conducting to cause, and the distance of the voltage of gap breakdown between will getting an electric shock according to switch adjusted, and adopt adjustable output even have, but range of adjustment is only for 0.5～3KV (or 1～3KV).

The number of times instability of 2, vibrating in the waveform; Owing to adopt bubble-discharge, but, often cause the instability of the number of oscillation in the waveform when requiring the pulse height timing; When voltage was low, the number of oscillation obviously reduced; Otherwise the concussion number of times increases, and burr is more in the waveform; Be owing to adopt bubble-discharge equally, the repetition rate of the wave of oscillation unadjustable (be generally 400 times/S); Even adjustable, also have only fixing several grades (as 50,100,200 and 400 times/S).

3, Shu Chu damped oscillation wave frequency is non-adjustable; It generally only establishes one grade, and as 1MHz, sometimes when choosing different spare part, industry can be changed into 500KHz, 200KHz, 100KHz etc., but thereupon circuit fixedly generation by frequency that spare part determined.

4, the polarity of the first peak of output damped oscillation wave impulse is also non-adjustable.

5, the high pressure during circuit working is very big to the damage of high-voltage switch gear S1, is subjected to very big influence serviceable life.

Summary of the invention

The utility model proposes a kind of circuit that produces the simulation damp oscillatory wave, the voltage pulse output shelves number that exists in the prior art is fixed to solve, number of oscillation problem of unstable in the waveform.

In order to address the above problem, solution of the present utility model is:

A kind of circuit that produces the simulation damp oscillatory wave produces circuit by high pressure wave generation circuit, high-voltage switch gear and waveform and forms, and it also comprises:

The circuit of this generation simulation damp oscillatory wave also includes pulse and produces control circuit and driver module, the pulse signal that this pulse produces the control circuit generation is input to this driver module, makes its break-make for this igbt and send drive signal by this driver module.

Described high-voltage switch gear is an insulated gate transistor.

Described high-voltage switch gear and waveform produce between the circuit and also are in series with the polarity transfer relay, and the control signal that described pulse produces control circuit output is input to this polarity transfer relay, realizes the switching of positive-negative polarity.

Also include in the described driver module: the DC/DC transducer that high voltage is isolated.

The circuit of generation simulation damp oscillatory wave described in the utility model, make full use of the high-speed switch characteristic of insulated gate bipolar transistor IGBT (Insulated Gate Bipolar Transistor), used as the high-voltage switch gear for generation simulation damped oscillation wave circuit, the whole principle of work of the present invention and the course of work meet International Electrotechnical Commission (International ElectrotechnicalCommission) IEC61000-4-12 standard fully.The characteristic of the electronics oncontacting electric switch of insulated gate bipolar transistor IGBT can guarantee the stable of output damped oscillation waveform; Its high voltage endurance realizes that the damp oscillatory wave voltage amplitude of output satisfies the IEC61000-4-12 of International Electrotechnical Commission standard.The present invention is adjustable by the positive-negative polarity of realizing exporting the pulse first peak by the polarity transfer relay.

Description of drawings

Fig. 1 is the circuit diagram that prior art produces the simulation damp oscillatory wave;

Fig. 2 is the circuit theory diagrams of generation simulation damp oscillatory wave of the present utility model.

Embodiment

For the ease of understanding the utility model embodiment, at first simply introduce the relevant background knowledge of insulated gate bipolar transistor IGBT below:

IGBT is called igbt, present existing power MOSFET (Metal-Oxide SemiconductorField Effect Transistor metallic oxide/semiconductor field-effect tube) pipe have switching speed fast, applicable to voltage-controlled advantage, shortcoming is that the forward voltage step-down is big slightly, and electric current, voltage capacity are little; And bipolar transistor, advantage, the shortcoming inequality of its relative merits and aforementioned power MOSFET pipe.But the advantage of the existing MOSFET pipe of insulated gate bipolar transistor IGBT has the advantage of bipolar transistor again during conducting.

The described a kind of circuit that produces the simulation damp oscillatory wave of the utility model embodiment proposes to use IGBT as high-voltage switch gear, and as shown in Figure 2, it is divided into major loop part and control loop part:

Major loop partly includes high pressure wave generation circuit 11, high-voltage switch gear S1 and waveform and produces circuit 13;

This high pressure wave generation circuit 11 is made up of mutual inductor T, commutating circuit Z, charging resistor R1, charging capacitor C1, this is a known technology, the adjustable ac source signal is after the input of the primary side place of mutual inductor T like this, finish by the second siding ring mutual inductance and to boost, voltage wave after boosting forms more stable high pressure wave signal at the C0 two ends after overcommutation, filtering, this high pressure wave signal is realized charging to charging capacitor C1 by charging resistor R1, and is that the generation of the wave of oscillation each time is ready.

This high-voltage switch gear S1 adopts insulated gate bipolar transistor IGBT, and IGBT utilizes field effect to come a kind of semiconductor devices of Control current, and it is divided into grid G, source S, drain D.Maximum shining point of the present invention adopts this insulated gate bipolar transistor IGBT exactly, and it occurs as gate-controlled switch, and the grid G of this IGBT is driven by a control loop (not shown) and driver module Q1, and these will be explained hereinafter.

This waveform produces circuit 13 and is made up of oscillator coil L1, filter inductance L2, filter resistance R2, filter capacitor C2, source resistance R 3.

For can being realized, present embodiment exports the alternative of simulating damp oscillatory wave first peak polarity, also be in series with polarity transfer relay K1, K2 between described high-voltage switch gear and waveform generation circuit, its control that is subjected to following pulse to produce control circuit realizes exporting the switching of simulation damp oscillatory wave first peak positive-negative polarity.

Control loop adopts common single-chip microcomputer just can realize, generally only needs to export Transistor-Transistor Logic level and gets final product.This control circuit can produce the driver module Q1 that the number of pulses that needs drives IGBT on the one hand, makes it drive IGBT; Its output can also be controlled the switching that polarity transfer relay K1, K2 realize positive-negative polarity on the other hand.This driver module Q1 can use intelligent gate-drive module I GD series IGBT driver, and it is in particular accurately, the driving of power tube reliably designs, and is applicable to driving and protection high-power in the series-parallel circuit, high withstand voltage module.Its driving and state recognition signal are by external Optical Fiber Transmission (can realize remote driving).This internal drive comprises a DC/DC transducer integrated, that high voltage is isolated, and its special logic function has improved the reliability of IGBT circuit working greatly, has greatly shortened user's development time.

In the present embodiment, when the driver module Q1 of IGBT receives a pulse signal from the output of aforementioned control loop, it is just sent out a drive signal and makes high-voltage switch gear S1 conducting to IGBT, and charging capacitor C1 is to follow-up circuit discharging, in the discharge process in port out place formation damp oscillatory wave; And polarity transfer relay K1, K2 just finish selection before discharge, promptly determine the polarity of the first peak of the damp oscillatory wave of output at present, and in the damp oscillatory wave of Chan Shenging, its first peak is a positive polarity as shown in Figure 2; Charging capacitor C1 once discharge finish after, high-voltage switch gear S1 disconnects again, charging capacitor C1 is charged as next time discharge again and prepares.Like this, by charging capacitor C1 periodically charge, discharge periodically is connected, disconnects with high-voltage switch gear S1, damp oscillatory wave that just can property performance period.

Have following characteristics according to the simulation damping vibration attenuation wave of oscillation that foregoing circuit obtained:

1, output pulse amplitude adjustable continuously (reaching as high as 2.5KV);

2, positive-negative polarity can be chosen wantonly;

3, pulse recurrence rate is 1～500 time/S, can set arbitrarily;

4, concussion number of times and the independent from voltage in the output waveform, and stable, smooth;

5, in addition, the time interval between the length of train of impulses and the every series impulse also can be set arbitrarily, so, use more satisfactory, also more convenient.

Claims

1, a kind of circuit that produces the simulation damp oscillatory wave produces circuit by high pressure wave generation circuit, high-voltage switch gear and waveform and forms, and it is characterized in that:

2, a kind of circuit that produces the simulation damp oscillatory wave as claimed in claim 1, it is characterized in that: described high-voltage switch gear is an insulated gate transistor.

3, a kind of circuit that produces the simulation damp oscillatory wave as claimed in claim 1, it is characterized in that: described high-voltage switch gear and waveform produce between the circuit and also are in series with the polarity transfer relay, the control signal that described pulse produces control circuit output is input to this polarity transfer relay, realizes the switching of positive-negative polarity.

4, a kind of circuit that produces the simulation damp oscillatory wave as claimed in claim 1 is characterized in that: also include in the described driver module: the DC/DC transducer that high voltage is isolated.