CN104125667A - Novel interlocking driving protection circuit of bridge tandem resonant induction heating power source - Google Patents
Novel interlocking driving protection circuit of bridge tandem resonant induction heating power source Download PDFInfo
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- CN104125667A CN104125667A CN201410197678.3A CN201410197678A CN104125667A CN 104125667 A CN104125667 A CN 104125667A CN 201410197678 A CN201410197678 A CN 201410197678A CN 104125667 A CN104125667 A CN 104125667A
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- brachium pontis
- igbt1
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Abstract
The invention provides a novel interlocking driving protection circuit of a bridge tandem resonant induction heating power source. The novel interlocking driving protection circuit is connected with an upper bridge arm IGBT1 (Insulated Gate Bipolar Transistor 1) and a lower bridge arm IGBT2 so that the upper bridge arm IGBT1 and the lower bridge arm IGBT2 cannot be connected simultaneously; the novel interlocking driving protection circuit is simple in structure, low in cost, and capable of realizing special protection effect by combining common components; meanwhile, the novel interlocking driving protection circuit is also capable of carrying out induction protection under weak current signals; the novel interlocking driving protection circuit is more convenient to mount and use, long in service life and good in protection effect.
Description
Technical field
The present invention relates to interlock Drive Protecting Circuit, specifically be the Drive Protecting Circuit design that is applicable to bridge-type series connection resonant inducing heating power supply.
Background technology
Common bridge-type series resonance is made interlock protection circuit in induction heating power supply circuit, its design is installed respectively current signal sensor additional by the upper and lower bridge arm at bridge-type series resonant circuit, again two current sensor signal are become after treatment to the locking signal of corresponding brachium pontis---that is to say that the signal getting from upper brachium pontis current sensor becomes the locking signal of lower brachium pontis after treatment, the signal getting from lower brachium pontis current sensor becomes the locking signal of upper brachium pontis after treatment---realizes thus, the interlocking of lower brachium pontis, make, there is short trouble in the conducting simultaneously of lower brachium pontis, with this protective circuit security of operation.
The protective circuit of above-mentioned design, is that the current signal transmitting taking current signal sensor is protection foundation, exists many-sided not enough: the one, and complex structure cost is high; The 2nd, can not play a protective role when faint at resonant circuit no signal current or current signal; Current sensor is installed in the 3rd, IGBT module and is caused installation and maintenance trouble, increase bus inductance.
The present invention is directed to the deficiency of above-mentioned protective circuit structure; consider the variety of issue 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, can effectively 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, a kind of bridge-type series connection resonant inducing heating power supply Novel interlock Drive Protecting Circuit is provided, not affected by current signal size, cost is low, protects effective.
For realizing above-mentioned technical purpose, the technical scheme adopting 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 the lower brachium pontis IGBT2 can not be simultaneously open-minded, the positive pole of upper brachium pontis IGBT1 driving power, the e1 utmost point of the anodal connecting triode Q1 of power supply, the b1 utmost point of Q1 connecting resistance R2 successively, the voltage stabilizing didoe DW1 and the fast recovery diode D1 that connect dorsad, the positive pole of fast recovery diode D1 is received the c utmost point of brachium pontis IGBT1, the c1 utmost point of Q1 is successively by resistance R 3, protection optocoupler 2 and amplifying circuit 2, be connected to the g utmost point of lower brachium pontis IGBT2, the positive pole of lower brachium pontis IGBT2 driving power, the e2 utmost point of the anodal connecting triode Q2 of power supply, the b2 utmost point of Q2 connecting resistance R5 successively, the voltage stabilizing didoe DW2 and the fast recovery diode D2 that connect dorsad, the positive pole of fast recovery diode D2 is received the c utmost point of brachium pontis IGBT2, the c2 utmost point of Q2 is successively by resistance R 6, protection optocoupler 1 and amplifying circuit 1, be connected to the g utmost point of lower brachium pontis IGBT1, realize interlocking.
The invention has the beneficial effects as follows: this Novel interlock Drive Protecting Circuit, simple in structure, cost is low; utilize common parts to carry out group and realize special protecting effect, meanwhile, under low current signal, also can respond to protection; install and use more conveniently, long service life, protects effective.
Brief description of the drawings
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 one group of protective circuit of half-bridge circuit, needs two groups of protective circuits of same structure, so the present invention is suitable for for half-bridge and full-bridge circuit for full-bridge circuit.No matter be one group of protective circuit for half-bridge, or for two groups of protective circuits of full-bridge, their circuit structure is identical, below we only discuss half-bridge left side brachium pontis, and other in like manner.In Fig. 1, Fig. 2, v is power supply, and 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 under normal operation opening and closing are to be operated under zero-voltage state, that is to say that they are opened to the whole period of closing, the pressure drop of its switching tube is zero---namely between the c utmost point of IGBT and the e utmost point, pressure drop is zero, is to approach zero in fact.By the ce pole tension of monitoring IGBT, just can know whether IGBT opens.
Bridge-type series connection resonant inducing heating power supply, each IGBT drive circuit power supply is insulating power supply power supply, each driving power zero potential point is communicated with the e utmost point of IGBT.
Taking half bridge series resonance induction heating power as example, the positive pole of upper brachium pontis IGBT1 driving power, connect the e1 utmost point of positive-negative-positive triode Q1, again from b1 utmost point connecting resistance R2, voltage stabilizing didoe DW1, the fast recovery diode D1 successively of Q1, finally receive the IGBT1-c utmost point (notice that voltage stabilizing didoe DW1 is connected dorsad with fast recovery diode D1, and fast recovery diode D1 positive pole connecing the c utmost point of IGBT1); When the IGBT1-c utmost point during lower than setting voltage (voltage set by selecting voltage stabilizing didoe DW1 voltage stabilizing value realize), that is to say in the time that IGBT1 opens, the e1 utmost point, the b1 utmost point, resistance R 2, voltage stabilizing didoe DW1, fast recovery diode D1 that electric current flows through PNP triode Q1 from driving power positive pole are to the IGBT1-c utmost point; Due to the amplification of triode, larger electric current flows through the e1 utmost point, the c1 utmost point, resistance R 3 and the protection optocoupler 2 of PNP triode Q1 from driving power positive pole simultaneously, obtains IGBT1 start signal; The signal of opening that obtains IGBT1 after photoelectricity isolation at the output of protection optocoupler 2 is also the locking signal of IGBT2 simultaneously, and while ensureing that IGBT1 opens, IGBT2 can not open; Drive optocoupler 2 output drive signals, drive signal and locking signal to amplify rear drive IGBT2 through amplifying circuit 2.
Lower brachium pontis lock-in circuit is the same with upper brachium pontis, and they are used in conjunction with formation interlock protection circuit in pairs, ensures that upper and lower brachium pontis can not be simultaneously open-minded.
Embodiment 1
Taking half bridge series resonance induction heating power as example, the positive pole of upper brachium pontis IGBT1 driving power, connect the e1 utmost point of positive-negative-positive triode Q1, again from b1 utmost point connecting resistance R2, voltage stabilizing didoe DW1, the fast recovery diode D1 successively of positive-negative-positive triode, finally receive the IGBT1-c utmost point (notice that voltage stabilizing didoe DW1 is connected dorsad with fast recovery diode D1, and fast recovery diode D1 positive pole connecing the IGBT1-c utmost point); When the ce of the IGBT1 utmost point during lower than setting voltage (voltage set by selecting voltage stabilizing didoe DW1 voltage stabilizing value realize), that is to say in the time that IGBT1 opens, the e1 utmost point, the b1 utmost point, resistance R 3, voltage stabilizing didoe DW1, fast recovery diode D1 that electric current flows through PNP triode from driving power positive pole are to the IGBT1-c utmost point; Due to the amplification of triode, larger electric current flows through the e1 utmost point, the c1 utmost point, resistance R 3 and the protection optocoupler 2 of PNP triode Q1 from driving power positive pole simultaneously, obtains IGBT1 start signal; The signal of opening that obtains IGBT1 after photoelectricity isolation at the output of protection optocoupler 2 is also the locking signal of IGBT2 simultaneously, and while ensureing that IGBT1 opens, IGBT2 can not open; Drive optocoupler 2 output drive signals, drive signal and locking signal to amplify rear drive IGBT2 through amplifying circuit.
The positive pole of lower brachium pontis IGBT2 driving power, connect the e2 utmost point of positive-negative-positive triode Q2, again from b2 utmost point connecting resistance R5, voltage stabilizing didoe DW2, the fast recovery diode D2 successively of positive-negative-positive triode, finally receive the IGBT2-c utmost point (notice that voltage stabilizing didoe DW2 is connected dorsad with fast recovery diode D2, and fast recovery diode D2 positive pole connecing the IGBT2-c utmost point); When the ce of the IGBT2 utmost point during lower than setting voltage (voltage set by selecting voltage stabilizing didoe DW2 voltage stabilizing value realize), that is to say in the time that IGBT2 opens, the e2 utmost point, the b2 utmost point, resistance R 5, voltage stabilizing didoe DW2, fast recovery diode D2 that electric current flows through PNP triode from driving power positive pole are to the IGBT2-c utmost point; Due to the amplification of triode, larger electric current flows through the e2 utmost point, the c2 utmost point, resistance R 6 and the protection optocoupler 2 of PNP triode Q2 from driving power positive pole simultaneously, obtains IGBT2 start signal; The signal of opening that obtains IGBT2 after photoelectricity isolation at the output of protection optocoupler 2 is also the locking signal of IGBT1 simultaneously, and while ensureing that IGBT2 opens, IGBT1 can not open; Drive optocoupler 1 output drive signal, drive signal and locking signal to amplify rear drive IGBT1 through amplifying circuit 1.
Upper and lower bridge arm lock-in circuit is the same, and they are used in conjunction with formation interlock protection circuit in pairs, ensures that upper and lower brachium pontis can not be simultaneously open-minded.
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 the lower brachium pontis IGBT2 can not be simultaneously open-minded, it is characterized in that: the e1 utmost point of the anodal connecting triode Q1 of upper brachium pontis IGBT1 driving power, the b1 utmost point of Q1 connecting resistance R2 successively, the voltage stabilizing didoe DW1 and the fast recovery diode D1 that connect dorsad, the positive pole of fast recovery diode D1 is received the c utmost point of brachium pontis IGBT1, the c1 utmost point of Q1 is successively by resistance R 3, protection optocoupler 2 and amplifying circuit 2, be connected to the g utmost point of lower brachium pontis IGBT2, in the time that IGBT1 opens, locking IGBT2 can not open, the positive pole of lower brachium pontis IGBT2 driving power connects the e2 utmost point of triode Q2, the b2 utmost point of Q2 is voltage stabilizing didoe DW2 and the fast recovery diode D2 of connecting resistance R5, connection dorsad successively, the positive pole of fast recovery diode D2 is received the c utmost point of brachium pontis IGBT2, the c2 utmost point of Q2 is successively by resistance R 6, protection optocoupler 1 and amplifying circuit 1, be connected to the g utmost point of lower brachium pontis IGBT1, realize interlocking.
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| 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 true CN104125667A (en) | 2014-10-29 |
| CN104125667B CN104125667B (en) | 2016-01-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112888100A (en) * | 2019-11-29 | 2021-06-01 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112888100A (en) * | 2019-11-29 | 2021-06-01 | 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 |
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| CN104125667B (en) | 2016-01-20 |
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Effective date of registration: 20151124 Address after: 471000 No. 90 Wangcheng Avenue, Luolong District, Henan, Luoyang Applicant after: Luoyang Institute Of Science And Technology Address before: 471000, room 1, building 410-2, Science Park, Qinling Mountains East Road, Luoyang East Road, Jianxi District, Henan, China Applicant before: LUOYANG HAOTE MODERN TESTING TECHNOLOGY CO., LTD. |
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