CN103683862A - Thyristor trigger circuit for three-phase input rectifying circuit of frequency converter - Google Patents
Thyristor trigger circuit for three-phase input rectifying circuit of frequency converter Download PDFInfo
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- CN103683862A CN103683862A CN201310723777.6A CN201310723777A CN103683862A CN 103683862 A CN103683862 A CN 103683862A CN 201310723777 A CN201310723777 A CN 201310723777A CN 103683862 A CN103683862 A CN 103683862A
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Abstract
The invention provides a thyristor trigger circuit for a three-phase input rectifying circuit of a frequency converter. The thyristor trigger circuit comprises a fast recovery diode, a charging capacitor, an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), an MOSFET grid drive adjusting circuit and a thyristor driving circuit. A phase voltage is input at the input end of the trigger circuit, the phase voltage is connected with an anode of the charging capacitor after passing through the fast recovery diode, the anode of the charging capacitor is connected with a source electrode of the MOSFET, a drain electrode of the MOSFET is connected with a door electrode of a thyristor to be triggered through the thyristor driving circuit, a cathode of the charging capacitor is respectively connected with a cathode of the thyristor to be triggered and a positive bus of the rectifying circuit of the frequency converter, and the MOSFET grid drive adjusting circuit is arranged between the charging capacitor and a grid electrode of the MOSFET. The thyristor trigger circuit disclosed by the invention is used for the three-phase input rectifying circuit, so that the scheme is more simple and practical, and the cost is reduced.
Description
Technical field
The invention belongs to frequency converter field, be specifically related to a kind of thyristor gating circuit for frequency converter three-phase input rectification circuit.
Background technology
The three-phase input rectification circuit of frequency converter has multiple implementation.The first is that 6 power semiconductors of rectification circuit are uncontrollable diode, and sort circuit is simple and practical, does not need extra circuits for triggering and signal condition and control circuit.But its problem is that the buffering that powers on of rectifier bridge is not easy to realize, and need to add very large main contactor and a little auxiliary contactor in the three-phase input of rectifier bridge.When powering on of rectifier cushioned, auxiliary contactor charges by buffer resistance three phase mains to the bus link of frequency converter, after charging finishes, disconnects auxiliary contactor, closed main contactor, and rectifier starts normal work.The second is that 6 power semiconductors are controlled thyristor, by the control to the thyristor angle of flow, can realize the foundation gradually of frequency converter busbar voltage, and not need extra contactor and resistance device.But it configure independently circuits for triggering need to 6 thyristors, to the control of the angle of flow that powers on, need complicated control circuit to participate in, and use 6 controllable devices increase the cost of frequency converter.The third is three device thyristors of upper brachium pontis of rectification circuit, and lower brachium pontis is still used diode.It needs a little auxiliary contactor, charge to the bus link of frequency converter in the loop when powering on buffering, three phase mains being consisted of buffer resistance and lower brachium pontis diode, now, because upper brachium pontis thyristor does not drive signal in closed condition, three phase mains can directly not given rectifier power supply.After charging finishes, disconnect auxiliary contactor, brachium pontis thyristor in triggering, rectifier is started working.It is a compromise of first two scheme, only needs in first scheme controllable devices and the drive circuit of half, does not also need expensive main contactor and complicated control circuit, has realized the combination of cost and simplification.
What the circuits for triggering of thyristor were the most frequently used is exactly to pass through driving transformer.As shown in Figure 1.By driving the break-make of signal Gp control switch pipe Q, when Q conducting, the energy of former limit power supply POWER passes to secondary by transformer Tr, through driving resistance R to produce drive current, carrys out conducting thyristor T; When Q turn-offs, transformer secondary does not have electric current, if electric current is less than and maintains electric current between the AK of thyristor T, T turn-offs.Sort circuit needs independently power circuit to produce former limit power supply POWER, need to gather three-phase input voltage and busbar voltage, judges to control send out ripple by modulate circuit and control circuit.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of thyristor gating circuit for frequency converter three-phase input rectification circuit is provided, can combine with the implementation of the third three-phase input rectification circuit in background technology, make the more succinct practicality of this scheme, reduce costs.
The present invention solves the problems of the technologies described above taked technical scheme to be: the thyristor gating circuit for frequency converter three-phase input rectification circuit, is characterized in that: it comprises that fast recovery diode, charging capacitor, MOSFET, MOSFET grid drive Circuit tuning and thyristor driving circuit; The input input phase voltage of these circuits for triggering, phase voltage is connected with the positive pole of charging capacitor after fast recovery diode, the positive pole of charging capacitor is connected with the source electrode of MOSFET, the drain electrode of MOSFET is connected with the gate pole of thyristor to be triggered by thyristor driving circuit, the negative pole of charging capacitor is connected with frequency converter rectification circuit positive bus-bar with the negative electrode of thyristor to be triggered respectively, is provided with MOSFET grid and drives Circuit tuning between charging capacitor and the grid of MOSFET.
Press such scheme, described MOSFET grid drives Circuit tuning to comprise the first resistance, the second resistance, the 3rd resistance and voltage stabilizing didoe, wherein one end of the first resistance is connected with described charging capacitor positive pole, the other end of the first resistance is connected with the negative pole of charging capacitor by the second resistance, and the first resistance is connected with the grid of MOSFET with the 3rd resistance by voltage stabilizing didoe with the connected node of the second resistance.
Press such scheme, described thyristor driving circuit is syllogic thyristor driving circuit, comprise three branch roads parallel with one another, article one, branch road is the 4th resistance, second branch road is the 5th resistance and the second electric capacity connecting in turn, article three, branch road is the 6th resistance and the 3rd electric capacity connecting in turn, and wherein the second electric capacity and the 3rd electric capacity are parallel with one another; It is R6<<R5<LEssT.LTss T.LTR4 that the resistance of the 4th to the 6th resistance R 4, R5, R6 is closed, and it is C3<<C2 that the capacitance of the two or three capacitor C 2, C3 is closed.
Press such scheme, be in series with one-way conduction diode between the drain electrode of described MOSFET and thyristor driving circuit, wherein the anode of one-way conduction diode and the drain electrode of MOSFET are connected.
A kind of frequency converter three-phase input rectification circuit, it is characterized in that: it comprises power on buffer circuit and the bridge rectifier connecting successively, three devices of upper brachium pontis of bridge rectifier are thyristor, three devices of lower brachium pontis are diode, and the circuits for triggering of each thyristor are the above-mentioned thyristor gating circuit for frequency converter three-phase input rectification circuit.
By above-mentioned frequency converter three-phase input rectification circuit, this rectification circuit also comprises 3 groups of single-pole double throw auxiliary contactors, be respectively first, second and third single-pole double throw auxiliary contactor, the input of first, second and third single-pole double throw auxiliary contactor is inputted respectively three-phase voltage, an output of first, second and third single-pole double throw auxiliary contactor is connected with the input of the described buffer circuit that powers on respectively, and another output of first, second and third single-pole double throw auxiliary contactor is connected with the input of thyristor gating circuit for frequency converter three-phase input rectification circuit respectively.
Operation principle of the present invention is: when frequency converter is at the buffer stage that powers on, three-phase alternating current input power is received the buffer circuit that powers on, and by buffer resistance, is that frequency converter bus charges.Now thyristor gating circuit is inputted without any external power source, can not realize the triggering of thyristor.After the buffering that powers on finishes, three-phase alternating current input power is introduced to drive circuit.In frequency converter, thyristor gating circuit is comprised of identical three covers, and every suit drives respectively the thyristor of upper pipe in three-phase brachium pontis separately.Each of three-phase alternating current input power is received the positive pole of charging capacitor by the fast recovery diode in corresponding circuits for triggering, and the negative electrode that the negative pole of this charging capacitor is corresponding thyristor is also the positive bus-bar of frequency converter rectification circuit simultaneously.When the electromotive force of phase power supply is during higher than the positive bus-bar electromotive force of frequency converter, fast recovery diode is by forward conduction.The charging capacitor being connected with fast recovery diode starts to be recharged, and capacitance voltage increases gradually.
Meanwhile, the positive pole of charging capacitor is received on the gate pole G of thyristor to be triggered by a MOSFET and thyristor driving circuit.The voltage that wherein driving voltage of the grid of MOSFET is the electric capacity that is connected with fast recovery diode obtains after electric resistance partial pressure and voltage-stabiliser tube.When the voltage of electric capacity has surpassed the gate drive voltage threshold values of MOSFET after electric resistance partial pressure and voltage-stabiliser tube, MOSFET conducting, thyristor driving circuit drives thyristor.
After thyristor conducting, the phase voltage of this thyristor place phase equates with frequency converter positive bus-bar voltage, then capacitance voltage higher than phase voltage, fast recovery diode is reversed cut-off.Electric charge in electric capacity is constantly delivered to the gate pole G of thyristor by MOSFET and thyristor driving circuit, capacitance voltage reduces gradually, and when capacitance voltage is not enough to maintain MOSFET conducting, MOSFET turn-offs, and drive circuit stops the driving to thyristor.But now the electric current in thyristor will continue to maintain the conducting of thyristor, until being less than thyristor while maintaining electric current, just can again turn-off in the electric current flowing through in thyristor.
Beneficial effect of the present invention is:
1, the driving electric energy of thyristor gating circuit of the present invention is from electric network source, at thyristor, not during conducting, by charging capacitor storing driver institute energy requirement, discharges gradually capacitance stores electric energy in driving process.MOSFET is the transmission to thyristor driving circuit for control capacitance electric energy.Only have when the sufficiently high value of capacitance voltage, MOSFET just understands conducting, and the drive circuit of rear class just can be worked.And the threshold values that this threshold values of capacitance voltage is comprised of resistance pressure-dividing network and voltage-stabiliser tube determines that circuit determines; Thyristor gating circuit of the present invention, for three-phase input rectification circuit, makes the more succinct practicality of this scheme, reduces costs.
2, this thyristor driving circuit is when electrical network phase voltage is during higher than rectifier bridge positive bus-bar voltage, and electric capacity obtains electrical network electric energy, and drive circuit makes thyristor conducting.This just guarantees that thyristor is will be triggered when each power frequency period forward bias, makes the work the same with the diode of lower brachium pontis of thyristor energy, but without signals collecting and triggering moment control circuit.
3, the MOSFET of this thyristor gating circuit and threshold values thereof determine that circuit has guaranteed that the driving voltage of drive circuit has certain amplitude, rather than electrical network phase voltage is during just higher than rectifier bridge positive bus-bar voltage, drive circuit is just started working, can only guarantee thyristor by reliably, conducting rapidly.
4, this thyristor gating circuit adopts the syllogic thyristor driving circuit that resistance, electric capacity form, and an one-way conduction diode has guaranteed the one-way flow of drive current, and can after charging capacitor voltage drop, not cause pouring in down a chimney of drive current.
Accompanying drawing explanation
Fig. 1 is thyristor gating circuit conventional in prior art.
Fig. 2 is the thyristor gating circuit structure chart of one embodiment of the invention.
Fig. 3 is the frequency 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, the 7-buffer circuit that powers on, 8-the first thyristor gating circuit, 9-the second thyristor gating circuit, 10-the 3rd thyristor gating circuit, 11-first thyristor to be triggered, 12-second thyristor to be triggered, 13-the 3rd thyristor to be triggered, 14-the first diode, 15-the second diode, 16-the 3rd diode, 17-frequency converter rectification circuit positive bus-bar.
Embodiment
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, and it comprises that fast recovery diode D1, charging capacitor C1, MOSFET Q1, MOSFET grid drive Circuit tuning and thyristor driving circuit; The input input phase voltage of these circuits for triggering, phase voltage is connected with the positive pole of charging capacitor C1 after fast recovery diode D1, the positive pole of charging capacitor C1 is connected with the source electrode of MOSFET Q1, the drain electrode of MOSFET Q1 is connected with the gate pole G of thyristor to be triggered by thyristor driving circuit, the negative pole of charging capacitor C1 is connected with frequency converter rectification circuit positive bus-bar with the negative electrode of thyristor to be triggered respectively, is provided with MOSFET grid and drives Circuit tuning between charging capacitor C1 and the grid of MOSFETQ1.
Described MOSFET grid drives Circuit tuning to comprise the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and voltage stabilizing didoe D2, wherein one end of the first resistance R 1 is connected with described charging capacitor C1 positive pole, the other end of the first resistance R 1 is connected with the negative pole of charging capacitor C1 by the second resistance R 2, and the first resistance R 1 is connected with the grid of MOSFET Q1 with the 3rd resistance R 3 by voltage stabilizing didoe D2 with the connected node of the second resistance R 2.
Described thyristor driving circuit is syllogic thyristor driving circuit, comprise three branch roads parallel with one another, article one, branch road is the 4th resistance R 4, second branch road is the 5th resistance R 5 and the second capacitor C 2 connecting in turn, article three, branch road is the 6th resistance R 6 and the 3rd electric capacity R3 connecting in turn, and wherein the second capacitor C 2 and the 3rd capacitor C 3 are parallel with one another; It is R6<<R5<LEssT.LTss T.LTR4 that the resistance of the 4th to the 6th resistance R 4, R5, R6 is closed, and it is C3<<C2 that the capacitance of the two or three capacitor C 2, C3 is closed.
Between the drain electrode of described MOSFET Q1 and thyristor driving circuit, be in series with one-way conduction diode D3, wherein the anode of one-way conduction diode D3 is connected with the drain electrode of MOSFET Q1.
Frequency converter three-phase input rectification circuit as shown in Figure 3, comprise power on buffer circuit 7 and the bridge rectifier that connect successively, three devices of upper brachium pontis of bridge rectifier are thyristor (i.e. the first to the 3rd thyristor 11-13 to be triggered), three devices of lower brachium pontis are diode (i.e. the first to the 3rd diode 14-16), and the circuits for triggering of each thyristor (i.e. the first to the 3rd thyristor gating circuit 8-10) are the thyristor gating circuit for frequency converter three-phase input rectification circuit.
This rectification circuit also comprises 3 groups of single-pole double throw auxiliary contactors, be respectively first, two, three single-pole double throw auxiliary contactor 4-6, first, two, the input of three single-pole double throw auxiliary contactor 4-6 input respectively three-phase voltage (respectively with A, B, C cross streams power supply 1-3 connects), first, two, an output of three single-pole double throw auxiliary contactor 4-6 is connected with the input of the described buffer circuit 7 that powers on respectively, first, two, another output of three single-pole double throw auxiliary contactor 4-6 is connected with the input of thyristor gating circuit (i.e. the first to the 3rd thyristor gating circuit 8-10) for frequency converter three-phase input rectification circuit respectively, 17 is frequency converter rectification circuit positive bus-bar.
When the bridge rectifier of frequency converter starts to power on buffering, first, second and third single-pole double throw auxiliary contactor 4-6 receives A, B, C cross streams power supply 1-3 to power on buffer circuit 7.When completing the buffering that powers on, when bridge rectifier need to be started working, first, second and third single-pole double throw auxiliary contactor 4-6 receives A, B, C cross streams power supply 1-3 on the first to the 3rd thyristor gating circuit 8-10.
Fast recovery diode D1 receives the positive pole of charging capacitor C1, and the negative electrode that charging capacitor C1 negative pole is corresponding thyristor to be triggered is also the positive bus-bar voltage DC+ of frequency converter simultaneously.When the electromotive force of phase power supply PHASE VOLTAGE is during higher than the positive bus-bar electromotive force DC+ of frequency converter, fast recovery diode D1 is by forward conduction.Charging capacitor C1 starts to be recharged, and capacitance voltage increases gradually.
The positive pole of charging capacitor C1 is received on the gate pole G of thyristor to be triggered by MOSFET Q1 and the syllogic thyristor driving circuit that is comprised of resistance R 4-R6, capacitor C 2-C3.
Resistance R 1-R2 and voltage-stabiliser tube D2 form MOSFET grid and drive Circuit tuning.The voltage V of charging capacitor C1
cafter the one the second resistance R 1, R2 dividing potential drop, the voltage at the first resistance R 1 two ends is
after the pressure drop VD of voltage stabilizing didoe D2, be again
if it is the gate drive voltage threshold values V of MOSFET Q1 that this voltage surpasses
g, MOSFETQ1 conducting.
After MOSFET Q1 conducting, the voltage V of charging capacitor C1
cby one-way conduction diode D3, be added on the thyristor driving circuit of the 4th to the 6th resistance R 4-R6, the two or three capacitor C 2-C3 composition.The the 4th to the 6th resistance R 4-R6, the two or three capacitor C 2-C3 have formed syllogic thyristor driving circuit.It is R6<<R5<LEssT.LTss T.LTR4 that the resistance of the 4th to the 6th resistance R 4-R6 is closed, and it is C3<<C2 that the capacitance of the two or three capacitor C 2-C3 is closed.When drive starting, the two or three electric capacity is equivalent to short circuit, so the drive current of thyristor mainly determines by the resistance after the 5th resistance R 5 and the 6th resistance R 6 parallel connections, and because the resistance after this parallel connection is very little, so drive current is very large.This current spike, much larger than the drive current of thyristor, makes thyristor conducting rapidly.After thyristor conducting, the electromotive force of phase power supply PHASE VOLTAGE and the positive bus-bar electromotive force DC+ of frequency converter equate, fast recovery diode D1 is reversed cut-off, and charging capacitor C1 has lost outside energy supplement, and driving process subsequently provides by the energy of storage in charging capacitor C1 completely.Along with the two or three capacitor C 2, C3 are recharged gradually, first the 3rd capacitor C 3 is filled electric charge, so the 6th resistance R 6 is cut off, drive current now is mainly determined by the 5th resistance R 5.Same, the second capacitor C 2 is filled after electric charge, and the 5th resistance R 5 is cut off, and drive current is now completely by the 4th resistance R 4 decisions, and the 4th resistance R 4 is gradually by the charge consumption in charging capacitor C1, and charging capacitor C1 voltage becomes 0V.The capacitance of the two or three capacitor C 2, C3 is all little, is mainly to provide thyristor at current spike and a milder electric current step at conducting initial stage, and the 4th R4 is to provide the drive current long period, that amplitude is little.
Claims (6)
1. for the thyristor gating circuit of frequency converter three-phase input rectification circuit, it is characterized in that: it comprises that fast recovery diode, charging capacitor, MOSFET, MOSFET grid drive Circuit tuning and thyristor driving circuit; The input input phase voltage of these circuits for triggering, phase voltage is connected with the positive pole of charging capacitor after fast recovery diode, the positive pole of charging capacitor is connected with the source electrode of MOSFET, the drain electrode of MOSFET is connected with the gate pole of thyristor to be triggered by thyristor driving circuit, the negative pole of charging capacitor is connected with frequency converter rectification circuit positive bus-bar with the negative electrode of thyristor to be triggered respectively, is provided with MOSFET grid and drives Circuit tuning between charging capacitor and the grid of MOSFET.
2. the thyristor gating circuit for frequency converter three-phase input rectification circuit according to claim 1, it is characterized in that: described MOSFET grid drives Circuit tuning to comprise the first resistance, the second resistance, the 3rd resistance and voltage stabilizing didoe, wherein one end of the first resistance is connected with described charging capacitor positive pole, the other end of the first resistance is connected with the negative pole of charging capacitor by the second resistance, and the first resistance is connected with the grid of MOSFET with the 3rd resistance by voltage stabilizing didoe with the connected node of the second resistance.
3. the thyristor gating circuit for frequency converter three-phase input rectification circuit according to claim 1 and 2, it is characterized in that: described thyristor driving circuit is syllogic thyristor driving circuit, comprise three branch roads parallel with one another, article one, branch road is the 4th resistance, second branch road is the 5th resistance and the second electric capacity connecting in turn, article three, branch road is the 6th resistance and the 3rd electric capacity connecting in turn, and wherein the second electric capacity and the 3rd electric capacity are parallel with one another; It is R6<<R5<LEssT.LTss T.LTR4 that the resistance of the 4th to the 6th resistance R 4, R5, R6 is closed, and it is C3<<C2 that the capacitance of the two or three capacitor C 2, C3 is closed.
4. the thyristor gating circuit for frequency converter three-phase input rectification circuit according to claim 1 and 2, it is characterized in that: between the drain electrode of described MOSFET and thyristor driving circuit, be in series with one-way conduction diode, wherein the anode of one-way conduction diode and the drain electrode of MOSFET are connected.
5. a frequency converter three-phase input rectification circuit, it is characterized in that: it comprises power on buffer circuit and the bridge rectifier connecting successively, three devices of upper brachium pontis of bridge rectifier are thyristor, three devices of lower brachium pontis are diode, and the circuits for triggering of each thyristor are claim 1 to the thyristor gating circuit for frequency converter three-phase input rectification circuit described in any one in claim 4.
6. frequency converter three-phase input rectification circuit according to claim 5, it is characterized in that: this rectification circuit also comprises 3 groups of single-pole double throw auxiliary contactors, be respectively first, two, three single-pole double throw auxiliary contactors, first, two, the input of three single-pole double throw auxiliary contactors is inputted respectively three-phase voltage, first, two, an output of three single-pole double throw auxiliary contactors is connected with the input of the described buffer circuit that powers on respectively, first, two, another output of three single-pole double throw auxiliary contactors is connected with the input of thyristor gating circuit for frequency converter three-phase input rectification circuit respectively.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050168897A1 (en) * | 2003-12-05 | 2005-08-04 | Vacon Oyj | Charging of a filter capacitor in the intermediate circuit of a frequency converter |
| 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 |
-
2013
- 2013-12-24 CN CN201310723777.6A patent/CN103683862B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050168897A1 (en) * | 2003-12-05 | 2005-08-04 | Vacon Oyj | Charging of a filter capacitor in the intermediate circuit of a frequency converter |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103683862B (en) | 2016-08-31 |
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