CN104125667B - Bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit - Google Patents
Bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit Download PDFInfo
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- CN104125667B CN104125667B CN201410197678.3A CN201410197678A CN104125667B CN 104125667 B CN104125667 B CN 104125667B CN 201410197678 A CN201410197678 A CN 201410197678A CN 104125667 B CN104125667 B CN 104125667B
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Abstract
Bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit; be connected with upper brachium pontis IGBT1 and lower brachium pontis IGBT2; make brachium pontis IGBT1 and lower brachium pontis IGBT2 can not be simultaneously open-minded, structure be simple, and cost is low; utilize common part to carry out group and realize special protecting effect; meanwhile, under low current signal, also can carry out induction protection, install and use more convenient; long service life, protected effect is good.
Description
Technical field
The present invention relates to interlocking Drive Protecting Circuit, specifically be the Drive Protecting Circuit design being applicable to bridge-type series connection resonant inducing heating power supply.
Background technology
Common bridge-type series resonance makes interlock protection circuit in induction heating power supply circuit, its design is by installing current signal sensor additional respectively at the upper and lower bridge arm of bridge-type series resonant circuit, again two current sensor signal being become after treatment the locking signal of corresponding brachium pontis---the signal that is got from upper bridge arm current transducer becomes the locking signal of lower brachium pontis after treatment, the signal simultaneously got from lower bridge arm current transducer becomes the locking signal of upper brachium pontis after treatment---realizes thus, the interlocking of lower brachium pontis, make, conducting simultaneously can not there is short trouble in lower brachium pontis, with this protective circuit security of operation.
The protective circuit of above-mentioned design is the current signal transmitted with current signal sensor is protection foundation, exists many-sided not enough: one is that complex structure cost is high; Two be resonant circuit no signal current or current signal faint time can not play a protective role; Three is IGBT module is installed current sensor to cause installation and maintenance to bother, and increases bus inductance.
The present invention is directed to the deficiency of above-mentioned protective circuit structure; consider the various problems of side circuit emerged in operation; propose a kind of bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit scheme, effectively can solve through experimental verification the short trouble that upper and lower bridge arm direct pass causes.
Summary of the invention
In order to overcome the defect of prior art, provide a kind of bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit, do not affect by electric current signal magnitude, cost is low, and protected effect is good.
For realizing above-mentioned technical purpose, the technical scheme adopted is: bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit, be connected with upper brachium pontis IGBT1 and lower brachium pontis IGBT2, make brachium pontis IGBT1 and lower brachium pontis IGBT2 can not be simultaneously open-minded, the positive pole of upper brachium pontis IGBT1 driving power, the e1 pole of the positive pole connecting triode Q1 of power supply, the b1 pole connecting resistance R2 successively of Q1, the voltage stabilizing didoe DW1 connected dorsad and fast recovery diode D1, the positive pole of fast recovery diode D1 receives the c pole of brachium pontis IGBT1, the c1 pole of Q1 is successively by resistance R3, protection optocoupler 2 and amplifying circuit 2, be connected to the g pole of lower brachium pontis IGBT2, the positive pole of lower brachium pontis IGBT2 driving power, the e2 pole of the positive pole connecting triode Q2 of power supply, the b2 pole connecting resistance R5 successively of Q2, the voltage stabilizing didoe DW2 connected dorsad and fast recovery diode D2, the positive pole of fast recovery diode D2 receives the c pole of brachium pontis IGBT2, the c2 pole of Q2 is successively by resistance R6, protection optocoupler 1 and amplifying circuit 1, be connected to the g pole of lower brachium pontis IGBT1, realize interlocking.
The invention has the beneficial effects as follows: this Novel interlock Drive Protecting Circuit, structure is simple, and cost is low; utilize common part to carry out group and realize special protecting effect, meanwhile, under low current signal, also can carry out induction protection; install and use more convenient, long service life, protected effect is good.
Accompanying drawing explanation
Fig. 1 is half bridge series resonance main circuit of the present invention;
Fig. 2 is full-bridge series resonance main circuit of the present invention;
Fig. 3 is interlock circuit theory diagram of the present invention.
Embodiment
Bridge-type series connection resonant inducing heating power supply, comprise half bridge series resonance induction heating power main circuit (accompanying drawing 1) and the large class of full-bridge series resonance induction heating power main circuit (accompanying drawing 2) two, half-bridge circuit only has the upper and lower brachium pontis switch in one group, the left side, and full-bridge circuit has the two groups of upper and lower brachium pontis switches in left and right.Novel interlock protective circuit of the present invention, for half-bridge circuit one group of protective circuit, needs two groups of protective circuits of same structure for full-bridge circuit, thus the present invention for half-bridge and full-bridge circuit all applicable.Be no matter one group of protective circuit for half-bridge, or for two groups of protective circuits of full-bridge, their circuit structure is identical, and we only discuss half-bridge left side brachium pontis below, and other in like manner.In Fig. 1, Fig. 2, v is power supply, IGBT1 and IGBT2, IGBT3 and IGBT4 are voltage-controlled type field effect transistor, and C1, C2 are electric capacity, and L is inductance.
Half bridge series resonance electromagnetic induction heating power supply main circuit (as Fig. 1), all switching tube IGBT open and close under normal operation be all work in zero voltage state, that is they are opened to the whole period of closedown, the pressure drop of its switching tube is zero---namely between the c pole of IGBT and e pole, pressure drop is zero, is close to zero in fact.By monitoring the ce pole tension of IGBT, just can know whether IGBT opens.
Bridge-type series connection resonant inducing heating power supply, each IGBT drive circuit power supply is that insulating power supply is powered, and each driving power zero potential point is communicated with the e pole of IGBT.
For half bridge series resonance induction heating power, the positive pole of upper brachium pontis IGBT1 driving power, connect the e1 pole of PNP type triode Q1, again from b1 pole connecting resistance R2, voltage stabilizing didoe DW1, the fast recovery diode D1 successively of Q1, finally receive IGBT1-c pole (notice that voltage stabilizing didoe DW1 is connected dorsad with fast recovery diode D1, and fast recovery diode D1 positive pole connecing the c pole of IGBT1); When IGBT1-c pole is lower than (voltage sets realizes by selecting the voltage stabilizing value of voltage stabilizing didoe DW1) during setting voltage, that is, when IGBT1 opens, electric current flows through the e1 pole of PNP triode Q1, b1 pole, resistance R2, voltage stabilizing didoe DW1, fast recovery diode D1 to IGBT1-c pole from driving power positive pole; Due to the amplification of triode, more big current flows through e1 pole, c1 pole, the resistance R3 of PNP triode Q1 from driving power positive pole and protects optocoupler 2 simultaneously, obtains IGBT1 start signal; IGBT1 after the output of protection optocoupler 2 obtains Phototube Coupling opens signal, and be also the locking signal of IGBT2, when ensureing that IGBT1 opens, IGBT2 can not open simultaneously; Drive optocoupler 2 output drive signal, drive singal and locking signal amplify rear drive IGBT2 through amplifying circuit 2.
Lower brachium pontis lock-in circuit is the same with upper brachium pontis, and they with the use of formation interlock protection circuit, ensure that upper and lower brachium pontis can not be simultaneously open-minded in pairs.
Embodiment 1
For half bridge series resonance induction heating power, the positive pole of upper brachium pontis IGBT1 driving power, connect the e1 pole of PNP type triode Q1, again from b1 pole connecting resistance R2, voltage stabilizing didoe DW1, the fast recovery diode D1 successively of PNP type triode, finally receive IGBT1-c pole (notice that voltage stabilizing didoe DW1 is connected dorsad with fast recovery diode D1, and fast recovery diode D1 positive pole connecing IGBT1-c pole); When the ce pole of IGBT1 is lower than (voltage sets realizes by selecting the voltage stabilizing value of voltage stabilizing didoe DW1) during setting voltage, that is, when IGBT1 opens, electric current flows through the e1 pole of PNP triode, b1 pole, resistance R3, voltage stabilizing didoe DW1, fast recovery diode D1 to IGBT1-c pole from driving power positive pole; Due to the amplification of triode, more big current flows through e1 pole, c1 pole, the resistance R3 of PNP triode Q1 from driving power positive pole and protects optocoupler 2 simultaneously, obtains IGBT1 start signal; IGBT1 after the output of protection optocoupler 2 obtains Phototube Coupling opens signal, and be also the locking signal of IGBT2, when ensureing that IGBT1 opens, IGBT2 can not open simultaneously; Drive optocoupler 2 output drive signal, drive singal and locking signal amplify rear drive IGBT2 through amplifying circuit.
The positive pole of lower brachium pontis IGBT2 driving power, connect the e2 pole of PNP type triode Q2, again from b2 pole connecting resistance R5, voltage stabilizing didoe DW2, the fast recovery diode D2 successively of PNP type triode, finally receive IGBT2-c pole (notice that voltage stabilizing didoe DW2 is connected dorsad with fast recovery diode D2, and fast recovery diode D2 positive pole connecing IGBT2-c pole); When the ce pole of IGBT2 is lower than (voltage sets realizes by selecting the voltage stabilizing value of voltage stabilizing didoe DW2) during setting voltage, that is, when IGBT2 opens, electric current flows through the e2 pole of PNP triode, b2 pole, resistance R5, voltage stabilizing didoe DW2, fast recovery diode D2 to IGBT2-c pole from driving power positive pole; Due to the amplification of triode, more big current flows through e2 pole, c2 pole, the resistance R6 of PNP triode Q2 from driving power positive pole and protects optocoupler 2 simultaneously, obtains IGBT2 start signal; IGBT2 after the output of protection optocoupler 2 obtains Phototube Coupling opens signal, and be also the locking signal of IGBT1, when ensureing that IGBT2 opens, IGBT1 can not open simultaneously; Drive optocoupler 1 output drive signal, drive singal and locking signal amplify rear drive IGBT1 through amplifying circuit 1.
Upper and lower bridge arm lock-in circuit is the same, and they with the use of formation interlock protection circuit, ensure that upper and lower brachium pontis can not be simultaneously open-minded in pairs.
Claims (1)
1. bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit, be connected with upper brachium pontis IGBT1 and lower brachium pontis IGBT2, make brachium pontis IGBT1 and lower brachium pontis IGBT2 can not be simultaneously open-minded, it is characterized in that: the e1 pole of the positive pole connecting triode Q1 of upper brachium pontis IGBT1 driving power, the b1 pole connecting resistance R2 successively of Q1, the voltage stabilizing didoe DW1 connected dorsad and fast recovery diode D1, the positive pole of fast recovery diode D1 receives the c pole of brachium pontis IGBT1, the c1 pole of Q1 is successively by resistance R3, protection optocoupler 2 and amplifying circuit 2, be connected to the g pole of lower brachium pontis IGBT2, lock IGBT2 can not open when IGBT1 opens, the positive pole of lower brachium pontis IGBT2 driving power connects the e2 pole of triode Q2, b2 pole connecting resistance R5, the voltage stabilizing didoe DW2 connected dorsad and fast recovery diode D2 successively of Q2, the positive pole of fast recovery diode D2 receives the c pole of brachium pontis IGBT2, the c2 pole of Q2 is successively by resistance R6, protection optocoupler 1 and amplifying circuit 1, be connected to the g pole of lower brachium pontis IGBT1, realize interlocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410197678.3A CN104125667B (en) | 2014-05-12 | 2014-05-12 | Bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit |
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| CN201410197678.3A CN104125667B (en) | 2014-05-12 | 2014-05-12 | Bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit |
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| CN104125667A CN104125667A (en) | 2014-10-29 |
| CN104125667B true CN104125667B (en) | 2016-01-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106452044A (en) * | 2016-11-22 | 2017-02-22 | 成都麦隆电气有限公司 | Signal interlock circuit for preventing short circuit of APF (active power filter) driving circuits |
| CN112888100B (en) * | 2019-11-29 | 2023-05-02 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic heating control method of half-bridge electromagnetic appliance and half-bridge electromagnetic appliance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204504A (en) * | 1988-08-26 | 1993-04-20 | Kabushiki Kaisha Toshiba | High-frequency heating apparatus including ringing effect suppressor for switching element |
| CN201328070Y (en) * | 2008-11-28 | 2009-10-14 | 深圳市易驱变频技术有限公司 | Ordinary optical coupler-based intelligent power module driving circuit |
| CN203859893U (en) * | 2014-05-12 | 2014-10-01 | 洛阳豪特现代测试技术有限公司 | Novel interlocking drive protection circuit of bridge-type serial resonant induction heating power supply |
-
2014
- 2014-05-12 CN CN201410197678.3A patent/CN104125667B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204504A (en) * | 1988-08-26 | 1993-04-20 | Kabushiki Kaisha Toshiba | High-frequency heating apparatus including ringing effect suppressor for switching element |
| CN201328070Y (en) * | 2008-11-28 | 2009-10-14 | 深圳市易驱变频技术有限公司 | Ordinary optical coupler-based intelligent power module driving circuit |
| CN203859893U (en) * | 2014-05-12 | 2014-10-01 | 洛阳豪特现代测试技术有限公司 | Novel interlocking drive protection circuit of bridge-type serial resonant induction heating power supply |
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