CN103683862B - Thyristor gating circuit for converter three-phase input rectification circuit - Google Patents
Thyristor gating circuit for converter three-phase input rectification circuit Download PDFInfo
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Abstract
The present invention is provided to the thyristor gating circuit of converter three-phase input rectification circuit, adjust circuit and thyristor driving circuit including fast recovery diode, charging capacitor, MOSFET, MOSFET raster data model；The input input phase voltage of this triggering circuit, phase voltage positive pole with charging capacitor after fast recovery diode is connected, the positive pole of charging capacitor is connected with the source electrode of MOSFET, the drain electrode of MOSFET is connected by the gate pole of thyristor driving circuit with IGCT to be triggered, the negative pole of charging capacitor is connected with negative electrode and the converter rectification circuit positive bus-bar of IGCT to be triggered respectively, is provided with MOSFET raster data model and adjusts circuit between charging capacitor and the grid of MOSFET.Thyristor gating circuit of the present invention is used for three-phase input rectification circuit, makes the program more brief and practical, reduces cost.
Description
Technical field
The invention belongs to converter field, be specifically related to a kind of thyristor gating circuit for converter three-phase input rectification circuit.
Background technology
The three-phase input rectification circuit of converter has multiple implementation.The first is 6 power semiconductors of rectification circuit
For uncontrollable diode, this circuit is simple and practical, it is not necessary to extra triggering circuit and signal condition and control circuit.But
Its problem is, the buffering that powers on of rectifier bridge is not easily accomplished, need rectifier bridge three-phase input add the biggest main contactor and
One little auxiliary contactor.Commutator power on buffering time, auxiliary contactor by three phase mains by buffer resistance to frequency conversion
The bus link charging of device, after charging terminates, disconnects auxiliary contactor, closes main contactor, and commutator starts normally to work.
The second be 6 power semiconductors be controlled IGCT, by the control to turn on thyristors angle, converter can be realized
Gradually building up of busbar voltage, without extra catalyst and resistance device.But it needs to 6 IGCT configurations independent
Triggering circuit, control the angle of flow that powers on to need complicated control circuit to participate in, and use the increase of 6 controllable devices
The cost of converter.The third is three device IGCTs of upper brachium pontis of rectification circuit, and lower brachium pontis still uses diode.
It needs a little auxiliary contactor, is consisted of buffer resistance and lower brachium pontis diode by three phase mains when powering on buffering
Charging to the bus link of converter in loop, does not now drive signal to be closed due to upper brachium pontis IGCT, three-phase electricity
Source will not be directly to rectifier power supply.After charging terminates, disconnecting auxiliary contactor, brachium pontis IGCT in triggering, commutator starts
Work.It is a compromise of first two scheme, it is only necessary to the controllable devices of half and drive circuit in first scheme, the most not
Need expensive main contactor and complicated control circuit, it is achieved that cost and the combination of simplification.
IGCT trigger circuit the most frequently used be through driving transformer.As shown in Figure 1.Open by driving signal Gp to control
Closing the break-make of pipe Q, when Q turns on, the energy of former limit power supply POWER passes to secondary by transformator Tr, through driving resistance R
Produce and drive electric current to carry out conducting thyristor T；When Q turns off, transformer secondary does not has electric current, if electricity between the AK of IGCT T
Stream is less than maintaining electric current, and T turns off.This circuit needs independent power circuit to produce former limit power supply POWER, needs to gather three
Phase input voltage and busbar voltage, judge to control to send out ripple by modulate circuit and control circuit.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of thyristor gating circuit for converter three-phase input rectification circuit,
Can combine with the implementation of the third three-phase input rectification circuit in background technology, make the program more brief and practical, fall
Low cost.
The present invention solves that the technical scheme that above-mentioned technical problem is taked is: for the brilliant lock of converter three-phase input rectification circuit
Pipe triggers circuit, it is characterised in that: it includes that fast recovery diode, charging capacitor, MOSFET, MOSFET raster data model adjust
Circuit and thyristor driving circuit；This triggering circuit input input phase voltage, phase voltage after fast recovery diode with fill
The positive pole of electricity electric capacity connects, and the positive pole of charging capacitor is connected with the source electrode of MOSFET, and thyristor driver is passed through in the drain electrode of MOSFET
Circuit is connected with the gate pole of IGCT to be triggered, the negative pole of charging capacitor respectively with negative electrode and the converter rectification of IGCT to be triggered
Circuit positive bus-bar connects, and is provided with MOSFET raster data model and adjusts circuit between charging capacitor and the grid of MOSFET.
By such scheme, described MOSFET raster data model adjusts circuit and includes the first resistance, the second resistance, the 3rd resistance and steady
Pressure diode, wherein one end of the first resistance is connected with described charging capacitor positive pole, and the other end of the first resistance is by the second electricity
Resistance is connected with the negative pole of charging capacitor, the connection node of the first resistance and the second resistance pass through Zener diode and the 3rd resistance and
The grid of MOSFET connects.
By such scheme, described thyristor driving circuit is syllogic thyristor driving circuit, including three parallel with one another propping up
Road, Article 1 branch road is the 4th resistance, and Article 2 branch road is the 5th resistance and the second electric capacity being sequentially connected with, and Article 3 branch road is
The 6th resistance being sequentially connected with and the 3rd electric capacity, wherein the second electric capacity and the 3rd electric capacity are parallel with one another；4th to the 6th resistance R4,
The value relatable of R5, R6 is that < < < < R4, the capacitance relation of the 2nd the 3rd electric capacity C2, C3 is C3 < < C2 to R5 to R6.
By such scheme, it is in series with one-way conduction diode between drain electrode and the thyristor driving circuit of described MOSFET, wherein
The anode of one-way conduction diode is connected with the drain electrode of MOSFET.
A kind of converter three-phase input rectification circuit, it is characterised in that: what it included being sequentially connected with power on buffer circuit and bridge-type are whole
Current circuit, three devices of the upper brachium pontis of bridge rectifier are IGCT, and three devices of lower brachium pontis are diode, each IGCT
Trigger circuit be the above-mentioned thyristor gating circuit for converter three-phase input rectification circuit.
By above-mentioned converter three-phase input rectification circuit, this rectification circuit also includes 3 groups of single-pole double throw auxiliary contactors, is respectively
First, second and third single-pole double throw auxiliary contactor, the input of first, second and third single-pole double throw auxiliary contactor inputs three respectively
Phase voltage, an outfan of first, second and third single-pole double throw auxiliary contactor respectively with the input of the described buffer circuit that powers on
End connect, another outfan of first, second and third single-pole double throw auxiliary contactor respectively with for converter three-phase input rectifying
The input of the thyristor gating circuit of circuit connects.
The operation principle of the present invention is: when converter receives, at the buffer stage that powers on, three-phase alternating current input power, the buffer circuit that powers on,
It is that converter bus is charged by buffer resistance.Now thyristor gating circuit does not has any external power source to input, it is impossible to real
The triggering of existing IGCT.After the buffering that powers on terminates, three-phase alternating current input power is introduced drive circuit.In converter,
Thyristor gating circuit is made up of identical three sets, and every suit drives the IGCT of upper pipe in respective three-phase brachium pontis respectively.Three
Each phase of cross streams input power receives the positive pole of charging capacitor by the corresponding fast recovery diode triggered in circuit, and this fills
The negative pole of electricity electric capacity is the negative electrode of corresponding IGCT, is also the positive bus-bar of converter rectification circuit simultaneously.When the electromotive force of phase power supply is high
When the positive bus-bar electromotive force of converter, fast recovery diode is by forward conduction.The charging capacitor being connected with fast recovery diode starts
Being electrically charged, capacitance voltage is gradually increased.
Meanwhile, the positive pole of charging capacitor is received on the gate pole G of IGCT to be triggered by a MOSFET and thyristor driving circuit.
Wherein the driving voltage of the grid of MOSFET is that the voltage of the electric capacity being connected with fast recovery diode is after electric resistance partial pressure and stabilivolt
Obtain.When the voltage of electric capacity has exceeded the gate drive voltage threshold values of MOSFET after electric resistance partial pressure and stabilivolt, and MOSFET leads
Logical, thyristor driving circuit drives IGCT.
When, after turn on thyristors, the phase voltage of this IGCT place phase is equal with converter positive bus-bar voltage, then capacitance voltage is high
In phase voltage, fast recovery diode is reversed cut-off.Electric charge in electric capacity is constantly transmitted by MOSFET and thyristor driving circuit
To the gate pole G of IGCT, capacitance voltage is gradually lowered, and when capacitance voltage is not enough to maintain MOSFET conducting, MOSFET turns off,
Drive circuit stops the driving to IGCT.But now the electric current in IGCT will continue to the conducting of IGCT, until brilliant lock
The electric current flow through in pipe just can turn off again less than IGCT when maintaining electric current.
The invention have the benefit that
1, the driving electric energy of thyristor gating circuit of the present invention is from electric network source, when IGCT does not turns on, deposits charging capacitor
Storage drives required energy, gradually discharges electric capacity storage electric energy during driving.MOSFET is used for controlling capacitive electric energy to IGCT
The transmission of drive circuit.Only when capacitance voltage sufficiently high value, MOSFET just can turn on, and the drive circuit of rear class just can work
Make.And the threshold values that this threshold values of capacitance voltage is made up of resistance pressure-dividing network and stabilivolt determines that circuit determines；Crystalline substance lock of the present invention
Pipe triggers circuit and is used for three-phase input rectification circuit, makes the program more brief and practical, reduces cost.
2, this thyristor driving circuit is when electrical network phase voltage is higher than rectifier bridge positive bus-bar voltage, and electric capacity obtains electrical network electric energy, drives
Circuit makes turn on thyristors.This ensures that IGCT is will to be triggered when each power frequency period forward bias so that IGCT
The work that energy is the same with the diode of lower brachium pontis, but without signals collecting and triggering moment control circuit.
3, MOSFET and the threshold values thereof of this thyristor gating circuit determines that circuit ensure that the driving voltage of drive circuit has necessarily
Amplitude rather than electrical network phase voltage just above rectifier bridge positive bus-bar voltage time, drive circuit begins to work, can only ensure crystalline substance
Brake tube by reliable, turn on rapidly.
4, the syllogic thyristor driving circuit that this thyristor gating circuit employing resistance, electric capacity are constituted, and an one-way conduction two
Pole pipe ensure that the one-way flow driving electric current, drives pouring in down a chimney of electric current without causing after charging capacitor voltage declines.
Accompanying drawing explanation
Fig. 1 is thyristor gating circuit commonly used in the prior art.
Fig. 2 is the thyristor gating circuit structure chart of one embodiment of the invention.
Fig. 3 is the converter rectified three-phase circuit structure chart of one embodiment of the invention.
In figure: 1-A cross streams power supply, 2-B cross streams power supply, 3-C cross streams power supply, 4-the first single-pole double throw auxiliary contactor,
5-the second single-pole double throw auxiliary contactor, 6-the 3rd single-pole double throw auxiliary contactor, 7-powers on buffer circuit, 8-the first IGCT
Trigger circuit, 9-the second thyristor gating circuit, 10-the 3rd thyristor gating circuit, 11-first IGCT to be triggered, 12-
Second IGCT to be triggered, 13-the 3rd IGCT to be triggered, 14-the first diode, 15-the second diode, 16-the three or two pole
Pipe, 17-converter rectification circuit positive bus-bar.
Detailed description of the invention
Below in conjunction with instantiation and accompanying drawing, the present invention will be further described.
Fig. 2 is the thyristor gating circuit structure chart of one embodiment of the invention, it include fast recovery diode D1, charging capacitor C1,
MOSFET Q1, MOSFET raster data model adjusts circuit and thyristor driving circuit；The input input phase voltage of this triggering circuit,
Phase voltage positive pole with charging capacitor C1 after fast recovery diode D1 is connected, the positive pole of charging capacitor C1 and MOSFET Q1
Source electrode connect, the drain electrode of MOSFET Q1 is connected with the gate pole G of IGCT to be triggered by thyristor driving circuit, charged electrical
The negative pole holding C1 is connected with negative electrode and the converter rectification circuit positive bus-bar of IGCT to be triggered respectively, charging capacitor C1 and MOSFET
It is provided with MOSFET raster data model between the grid of Q1 and adjusts circuit.
Described MOSFET raster data model adjusts circuit and includes the first resistance R1, the second resistance R2, the 3rd resistance R3 and voltage stabilizing two
Pole pipe D2, wherein one end of the first resistance R1 is connected with described charging capacitor C1 positive pole, and the other end of the first resistance R1 leads to
The negative pole crossing the second resistance R2 and charging capacitor C1 is connected, and the connection node of the first resistance R1 and the second resistance R2 passes through voltage stabilizing
The grid of diode D2 and the 3rd resistance R3 and MOSFET Q1 is connected.
Described thyristor driving circuit is syllogic thyristor driving circuit, and including three branch roads parallel with one another, Article 1 is propped up
Lu Wei tetra-resistance R4, Article 2 branch road is the 5th resistance R5 and the second electric capacity C2 being sequentially connected with, and Article 3 branch road is sequentially
The 6th resistance R6 connected and the 3rd electric capacity R3, wherein the second electric capacity C2 and the 3rd electric capacity C3 is parallel with one another；4th to the 6th
The value relatable of resistance R4, R5, R6 is that < < < < R4, the capacitance relation of the 2nd the 3rd electric capacity C2, C3 is C3 < < C2 to R5 to R6.
One-way conduction diode D3 it is in series with between drain electrode and the thyristor driving circuit of described MOSFET Q1, the most unidirectional
The anode of logical diode D3 is connected with the drain electrode of MOSFET Q1.
Converter three-phase input rectification circuit as it is shown on figure 3, include power on buffer circuit 7 and the bridge rectifier being sequentially connected with,
Three devices of the upper brachium pontis of bridge rectifier are IGCT (the i.e. first to the 3rd IGCT 11-13 to be triggered), lower brachium pontis three
Device is diode (the i.e. first to the 3rd diode 14-16), triggering circuit (i.e. first to the 3rd IGCT of each IGCT
Trigger circuit 8-10) it is the thyristor gating circuit for converter three-phase input rectification circuit.
This rectification circuit also includes 3 groups of single-pole double throw auxiliary contactors, respectively first, second and third single-pole double throw auxiliary contactor
4-6, the input of first, second and third single-pole double throw auxiliary contactor 4-6 inputs three-phase voltage respectively (the most respectively with A, B, C
Cross streams power supply 1-3 connects), an outfan of first, second and third single-pole double throw auxiliary contactor 4-6 is upper with described respectively
Electricity buffer circuit 7 input connect, another outfan of first, second and third single-pole double throw auxiliary contactor 4-6 respectively with
Thyristor gating circuit (the i.e. first to the 3rd thyristor gating circuit 8-10) defeated for converter three-phase input rectification circuit
Entering end to connect, 17 is converter rectification circuit positive bus-bar.
When the bridge rectifier of converter starts power up buffering, first, second and third single-pole double throw auxiliary contactor 4-6 by A,
B, C cross streams power supply 1-3 receives and powers on buffer circuit 7.When completing the buffering that powers on, bridge rectifier needs to start working
Time, A, B, C cross streams power supply 1-3 is received first to trimorphism lock by first, second and third single-pole double throw auxiliary contactor 4-6
Pipe triggers on circuit 8-10.
Fast recovery diode D1 receives the positive pole of charging capacitor C1, and charging capacitor C1 negative pole is the moon of corresponding IGCT to be triggered
Pole, is also the positive bus-bar voltage DC+ of converter simultaneously.When the electromotive force of phase power supply PHASE VOLTAGE is just being higher than converter
During bus electromotive force DC+, fast recovery diode D1 is by forward conduction.Charging capacitor C1 starts to be electrically charged, and capacitance voltage gradually increases
Add.
The positive pole of charging capacitor C1 is by MOSFET Q1 and the syllogic IGCT that is made up of resistance R4-R6, electric capacity C2-C3
Drive circuit is received on the gate pole G of IGCT to be triggered.
Resistance R1-R2 and stabilivolt D2 constitutes MOSFET raster data model and adjusts circuit.The voltage V of charging capacitor C1cThrough first
After second resistance R1, R2 dividing potential drop, the voltage at the first resistance R1 two ends isAgain through the pressure of Zener diode D2
After fall VD it isIf this voltage exceedes the gate drive voltage threshold values V for MOSFET Q1g, MOSFET
Q1 turns on.
After MOSFET Q1 conducting, the voltage V of charging capacitor C1cIt is added to the 4th to the 6th electricity by one-way conduction diode D3
On the thyristor driving circuit that resistance R4-R6, the 2nd the 3rd electric capacity C2-C3 form.4th to the 6th resistance R4-R6, the two the
Three electric capacity C2-C3 constitute syllogic thyristor driving circuit.The value relatable of the 4th to the 6th resistance R4-R6 is
< < < < R4, the capacitance relation of the 2nd the 3rd electric capacity C2-C3 is C3 < < C2 to R5 to R6.When driving beginning, the 2nd the 3rd electricity
Holding and be equivalent to short circuit, therefore the electric current that drives of IGCT is mainly determined by the resistance after the 5th resistance R5 and the 6th resistance R6 parallel connection,
Owing to the resistance after this parallel connection is the least, therefore drive electric current the biggest.This current spike is much larger than the driving electric current of IGCT,
IGCT can be turned on rapidly.After turn on thyristors, the electromotive force of phase power supply PHASE VOLTAGE and the positive bus-bar of converter
Electromotive force DC+ is equal, and fast recovery diode D1 is reversed cut-off, and charging capacitor C1 loses the energy supplement of outside, subsequently
Driving process provide by the energy of storage in charging capacitor C1 completely.Along with the 2nd the 3rd electric capacity C2, C3 is gradually electrically charged,
First 3rd electric capacity C3 is fully charged, and then the 6th resistance R6 is cut off, and driving electric current now is mainly by the 5th resistance
R5 determines.Same, after the second electric capacity C2 is fully charged, the 5th resistance R5 is cut off, and driving electric current now is complete
Being determined by the 4th resistance R4, the 4th resistance R4 is gradually by the charge consumption in charging capacitor C1, and charging capacitor C1 voltage becomes
For 0V.The capacitance of the 2nd the 3rd electric capacity C2, C3 is all little, mainly provides the IGCT current spike and at the conducting initial stage
Individual shallower current step, driving electric current that the 4th R4 is to provide the long period, that amplitude is little.
Claims (5)
1. for the thyristor gating circuit of converter three-phase input rectification circuit, it is characterised in that: it include fast recovery diode,
Charging capacitor, MOSFET, MOSFET raster data model adjust circuit and thyristor driving circuit；The input input of this triggering circuit
Phase voltage, phase voltage positive pole with charging capacitor after fast recovery diode is connected, the positive pole of charging capacitor and the source of MOSFET
Pole connects, and the drain electrode of MOSFET is connected by the gate pole of thyristor driving circuit with IGCT to be triggered, and the negative pole of charging capacitor divides
It is not connected with negative electrode and the converter rectification circuit positive bus-bar of IGCT to be triggered, is provided with between charging capacitor and the grid of MOSFET
MOSFET raster data model adjusts circuit；
Described thyristor driving circuit is syllogic thyristor driving circuit, and including three branch roads parallel with one another, Article 1 is propped up
Lu Wei tetra-resistance, Article 2 branch road is the 5th resistance and the second electric capacity being sequentially connected with, and Article 3 branch road is be sequentially connected with
Six resistance and the 3rd electric capacity, wherein the second electric capacity and the 3rd electric capacity are parallel with one another；The resistance of the 4th to the 6th resistance is R4, R5,
R6, value relatable is that < < < < R4, the capacitance of the 2nd the 3rd electric capacity is C2, C3 to R5 to R6, and capacitance relation is C3 < < C2.
Thyristor gating circuit for converter three-phase input rectification circuit the most according to claim 1, it is characterised in that:
Described MOSFET raster data model adjusts circuit and includes the first resistance, the second resistance, the 3rd resistance and Zener diode, Qi Zhong
One end of one resistance is connected with described charging capacitor positive pole, negative by the second resistance and charging capacitor of the other end of the first resistance
Pole connects, and the node that connects of the first resistance and the second resistance is connected with the grid of MOSFET by Zener diode and the 3rd resistance.
Thyristor gating circuit for converter three-phase input rectification circuit the most according to claim 1 and 2, its feature
It is: between drain electrode and the thyristor driving circuit of described MOSFET, be in series with one-way conduction diode, wherein one-way conduction two
The anode of pole pipe is connected with the drain electrode of MOSFET.
4. a converter three-phase input rectification circuit, it is characterised in that: it includes power on buffer circuit and the bridge-type being sequentially connected with
Rectification circuit, three devices of the upper brachium pontis of bridge rectifier are IGCT, and three devices of lower brachium pontis are diode, each brilliant lock
Pipe trigger circuit be claim 1 to described in any one in claim 3 for converter three-phase input rectification circuit
Thyristor gating circuit.
Converter three-phase input rectification circuit the most according to claim 4, it is characterised in that: this rectification circuit also includes 3
Group single-pole double throw auxiliary contactor, respectively first, second and third single-pole double throw auxiliary contactor, first, second and third single-pole double throw
The input of auxiliary contactor inputs three-phase voltage respectively, and an outfan of first, second and third single-pole double throw auxiliary contactor divides
It is not connected with the input of the described buffer circuit that powers on, another outfan of first, second and third single-pole double throw auxiliary contactor
Input with the thyristor gating circuit for converter three-phase input rectification circuit is connected respectively.
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| CN201310723777.6A CN103683862B (en) | 2013-12-24 | 2013-12-24 | Thyristor gating circuit for converter three-phase input rectification circuit |
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| CN201310723777.6A CN103683862B (en) | 2013-12-24 | 2013-12-24 | Thyristor gating circuit for converter three-phase input rectification circuit |
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| CN103683862B true CN103683862B (en) | 2016-08-31 |
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| US9564891B1 (en) | 2015-10-28 | 2017-02-07 | Crydom, Inc. | Low conducted emission solid state switch |
| CN110011520A (en) * | 2019-03-26 | 2019-07-12 | 宁波安信数控技术有限公司 | The constant-current drive circuit of thyristor in a kind of rectified three-phase circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231604A (en) * | 2011-07-06 | 2011-11-02 | 深圳市英威腾电源有限公司 | Rectifier and uninterruptible power system (UPS) |
| JP2012244687A (en) * | 2011-05-17 | 2012-12-10 | Funai Electric Co Ltd | Electronic device |
| CN203104312U (en) * | 2012-12-17 | 2013-07-31 | 中国船舶重工集团公司第七一五研究所 | Controllable rectifying device of portable gasoline generator |
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| FI116336B (en) * | 2003-12-05 | 2005-10-31 | Vacon Oyj | Charging of the filter capacitor in a DC converter's DC voltage circuit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012244687A (en) * | 2011-05-17 | 2012-12-10 | Funai Electric Co Ltd | Electronic device |
| CN102231604A (en) * | 2011-07-06 | 2011-11-02 | 深圳市英威腾电源有限公司 | Rectifier and uninterruptible power system (UPS) |
| CN203104312U (en) * | 2012-12-17 | 2013-07-31 | 中国船舶重工集团公司第七一五研究所 | Controllable rectifying device of portable gasoline generator |
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