CN103532362B - A kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through - Google Patents
A kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through Download PDFInfo
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- CN103532362B CN103532362B CN201210231244.1A CN201210231244A CN103532362B CN 103532362 B CN103532362 B CN 103532362B CN 201210231244 A CN201210231244 A CN 201210231244A CN 103532362 B CN103532362 B CN 103532362B
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Abstract
The present invention relates to high-power servo-drive safety circuit technical field, specifically disclose a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through.In this circuit, several on off states are the upper power tube state of a control signal PWMX of antilogical and lower power tube state of a control signal PWMY is complementary signal, and the gate circuit be in the same way input in interlocking signal circuit and reverse swing door circuit; PWMX carries out " line with " reverse swing door circuit afterwards in input signal ReSet Circuit by the output of gate circuit in the same way and PWMY by the output of reverse swing door circuit, power tube control signal PWMAX in acquisition; PWMY carries out " line with " reverse swing door circuit afterwards in input signal ReSet Circuit by the output of gate circuit in the same way and PWMY by the output of reverse swing door circuit, obtains lower power tube control signal PWMAY.This circuit is simple, reliable, effectively can prevent power model from driving the upper and lower power tube of same brachium pontis to open simultaneously and cause this bridge arm direct pass, be reduced by the excessive damage to power tube of power tube current.
Description
Technical field
The invention belongs to high-power servo-drive safety circuit technical field, be specifically related to a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through.
Background technology
In motor driver and inverter field, form voltage chopping brachium pontis by drived control power model IGBT, IPM or MOSFET, the brachium pontis forming this copped wave module has two brachium pontis, three brachium pontis, the building form that six brachium pontis etc. are different.In the process controlling this brachium pontis copped wave, key is the switch controlling brachium pontis lower power tube, controls the copped wave of power tube successively, in the process, normal state is that the on off state of same brachium pontis lower power tube is contrary, even goes up power tube and opens, then descend power tube to close; If upper power tube closes, then power tube is descended to open.If produce the situation that the upper and lower power tube of same brachium pontis is opened simultaneously, then the electric current of this brachium pontis will increase instantaneously, can cause damage, and cause security incident to power tube.
Summary of the invention
The object of the present invention is to provide a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through, can prevent the upper and lower power tube of the same brachium pontis of power model from opening simultaneously cause this bridge arm direct pass, be reduced by the excessive damage to power tube of power tube current.
Technical scheme of the present invention is as follows: a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through, and comprise interlocking signal circuit and signal ReSet Circuit, wherein, interlocking signal circuit comprises gate circuit U13 and reverse swing door circuit U 14 in the same way; Several on off states are the upper power tube state of a control signal PWMX of the same brachium pontis of power model to be controlled of antilogical and lower power tube state of a control signal PWMY normal condition is complementary signal, and the U13 of gate circuit in the same way be simultaneously input in interlocking signal circuit and reverse swing door circuit U 14; Upper power tube state of a control signal PWMX carries out " line with " by the output of gate circuit U13 in the same way and lower power tube state of a control signal PWMY by the output of reverse swing door circuit U 14 and operate reverse swing door circuit U 15 in input signal ReSet Circuit afterwards, obtains the upper power tube control signal PWMAX of the same brachium pontis of power model to be controlled; Lower power tube state of a control signal PWMY carries out " line with " by the output of gate circuit U13 in the same way and lower power tube state of a control signal PWMY by the output of reverse swing door circuit U 14 and operate reverse swing door circuit U 15 in input signal ReSet Circuit afterwards, obtains the lower power tube control signal PWMAY of the same brachium pontis of power model to be controlled.
The described U13 of gate circuit is in the same way open collector driving gate in the same way, and its output signal is identical with original signal state.
Described reverse swing door circuit U 14 and reverse swing door circuit U 15 are reverse drive gate circuit, and its output signal is identical with original signal state.
Described power model to be controlled is the power model of control two brachium pontis or three brachium pontis or six brachium pontis.
In the safety circuit of described control three brachium pontis power model, the concrete structure of interlocking signal circuit is: on the first brachium pontis, power tube state of a control signal PWM1 is connected with reverse swing door circuit U 14 first input end A1 with gate circuit U13 first input end A1 in the same way simultaneously; Under first brachium pontis, power tube state of a control signal PWM2 is connected with reverse swing door circuit U 14 second input A2 with gate circuit U13 second input A2 in the same way simultaneously; On second brachium pontis, power tube state of a control signal PWM3 is connected with reverse swing door circuit U 14 the 3rd input A3 with gate circuit U13 the 3rd input A3 in the same way simultaneously; Under second brachium pontis, power tube state of a control signal PWM4 is connected with reverse swing door circuit U 14 four-input terminal A4 with gate circuit U13 four-input terminal A4 in the same way simultaneously; On 3rd brachium pontis, power tube state of a control signal PWM5 is connected with reverse swing door circuit U 14 the 5th input A5 with gate circuit U13 the 5th input A5 in the same way simultaneously; Under 3rd brachium pontis, power tube state of a control signal PWM6 is connected with reverse swing door circuit U 14 the 6th input A6 with gate circuit U13 the 6th input A6 in the same way simultaneously; Gate circuit U13 first output Y1 and reverse swing door circuit U 14 second output Y2 is connected on the power supply branch road with resistance R17 jointly in the same way, and formation control signal PWM1! 2; Gate circuit U13 second output Y2 and reverse swing door circuit U 14 first output Y1 is connected on the power supply branch road with resistance R16 jointly in the same way, and formation control signal PWM2! 1; Gate circuit U13 the 3rd output Y3 and reverse swing door circuit U 14 the 4th output Y4 is connected on the power supply branch road with resistance R15 jointly in the same way, and formation control signal PWM3! 4; Gate circuit U13 the 4th output Y4 and reverse swing door circuit U 14 the 3rd output Y3 is connected on the power supply branch road with resistance R14 jointly in the same way, and formation control signal PWM4! 3; Gate circuit U13 the 5th output Y5 and reverse swing door circuit U 14 the 6th output Y6 is connected on the power supply branch road with resistance R18 jointly in the same way, and formation control signal PWM5! 6; Gate circuit U13 the 6th output Y6 and reverse swing door circuit U 14 the 5th output Y5 is connected on the power supply branch road with resistance R19 jointly in the same way, and formation control signal PWM4! 3; The VCC port of gate circuit U13 is all connected with power supply with the VCC port of reverse swing door circuit U 14 in the same way; The GND port of gate circuit U13 and the GND port of reverse swing door circuit U 14 are all connected to the ground in the same way.
In the safety circuit of described control three brachium pontis power model, the concrete structure of signal restoring circuit is: control signal PWM2! 1, PWM1! 2, PWM3! 4, PWM6! 5, PWM5! 6 and PWM4! 3 first input end A1, the second input A2 being connected respectively to reverse swing door circuit U 15, the 3rd input A3, four-input terminal A4, the 5th input A5 and the 6th input A6; Power supply branch road with resistance R24 is connected to the first output Y1 of reverse swing door circuit U 15, and the upper power tube control signal PWMA1 of formation control first brachium pontis; Power supply branch road with resistance R23 is connected to the second output Y2 of reverse swing door circuit U 15, and the lower power tube control signal PWMA2 of formation control first brachium pontis; Power supply branch road with resistance R22 is connected to the 3rd output Y3 of reverse swing door circuit U 15, and the upper power tube control signal PWMA3 of formation control second brachium pontis; Power supply branch road with resistance R21 is connected to the 4th output Y4 of reverse swing door circuit U 15, and the lower power tube control signal PWMA6 of formation control the 3rd brachium pontis; Power supply branch road with resistance R26 is connected to the 5th output Y5 of reverse swing door circuit U 15, and the upper power tube control signal PWMA5 of formation control the 3rd brachium pontis; Power supply branch road with resistance R25 is connected to the 6th output Y6 of reverse swing door circuit U 15, and the lower power tube control signal PWMA4 of formation control second brachium pontis; The VCC port of gate circuit U15 is connected with power supply in the same way; The GND port of gate circuit U13 is connected to the ground in the same way.
Described power supply branch road power supply is 5V, and power supply is 5V.
The resistance of described R14, R15, R16, R17, R18 and R19 is 4.7k Ω; The resistance of described R21, R22, R23, R24, R25 and R26 is 4.7k Ω.
Described U13 model is 74LS7407.
Described U14 and U15 model is 74LS7406.
Remarkable result of the present invention is: a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through of the present invention, implementation is simple, reliable, effectively can prevent power model from driving the upper and lower power tube of same brachium pontis to open simultaneously and cause this bridge arm direct pass, be reduced by the excessive damage to power tube of power tube current.
Accompanying drawing explanation
Fig. 1 is a kind of safety circuit structural representation preventing power model from driving three brachium pontis lower power tubes straight-through of the present invention
Fig. 2 is interlock circuit schematic diagram in a kind of safety circuit preventing power model from driving three brachium pontis lower power tubes straight-through of the present invention;
Fig. 3 is this is signal restoring circuit diagram in a kind of safety circuit preventing power model from driving three brachium pontis lower power tubes straight-through of the present invention.
In figure, 1, interlock circuit; 2, signal restoring circuit
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1 and Figure 2, for the safety circuit preventing power model from driving brachium pontis lower power tube straight-through of three brachium pontis, comprise interlock circuit and signal restoring circuit, wherein, interlocking signal circuit comprises gate circuit U13 and reverse swing door circuit U 14 in the same way; Control upper power tube control signal PWMA1 and the next complementary signal of lower power tube state of a control signal PWM2 normal condition of the first brachium pontis of power model, can not be high signal simultaneously, i.e. PWM1=1, PWM2=0 or PWM1=0, PWM2=1.On first brachium pontis, power tube state of a control signal PWM1 is connected with reverse swing door circuit U 14 first input end A1 with gate circuit U13 first input end A1 in the same way simultaneously; Under first brachium pontis, power tube state of a control signal PWM2 is connected with reverse swing door circuit U 14 second input A2 with gate circuit U13 second input A2 in the same way simultaneously; Gate circuit U13 first output Y1 and reverse swing door circuit U 14 second output Y2 is connected on the power supply branch road with resistance R17 jointly in the same way, and formation control signal PWM1! 2, namely go up power tube state of a control signal PWM1 and undertaken after " line with " operate by the output of gate circuit U13 in the same way and lower power tube state of a control signal PWM2 by the output of reverse swing door circuit U 14, acquisition control signal PWM1! 2; Gate circuit U13 second output Y2 and reverse swing door circuit U 14 first output Y1 is connected on the power supply branch road with resistance R16 jointly in the same way, and formation control signal PWM2! 1, namely descend power tube state of a control signal PWM2 to be undertaken after " line with " operate by the output of gate circuit U13 in the same way and lower power tube state of a control signal PWM1 by the output of reverse swing door circuit U 14, acquisition control signal PWM2! 1; Control signal PWM2! 1, PWM1! 2 first input end A1, the second input A2 being connected respectively to reverse swing door circuit U 15; Power supply branch road with resistance R24 is connected to the first output Y1 of reverse swing door circuit U 15, and the upper power tube control signal PWMA1 of formation control first brachium pontis; Power supply branch road with resistance R23 is connected to the second output Y2 of reverse swing door circuit U 15, and the lower power tube control signal PWMA2 of formation control first brachium pontis; Power model on off state is antilogical, and therefore, the control signal PWMA1 of acquisition and PWMA2 may be used for the break-make of control first brachium pontis power tube, prevents the upper and lower power tube of the first brachium pontis from opening simultaneously and causes this bridge arm direct pass.
The syndeton of the second brachium pontis and the 3rd brachium pontis and the similar of the first brachium pontis.
The specific works process of a kind of safety circuit preventing power model from driving brachium pontis lower power tube to lead directly to of the present invention is:
When power model is in normal signal state of a control, as PWM1=1, PWM2=0, wherein, PWM1=1 represents high signal, and PWM2=0 represents low signal; Because U13 is open collector driving gate in the same way, therefore its output signal is identical with original signal state, so PWM1(U13)=1, PWM2(U13)=0, wherein, PWM1(U13) represent the output through gate circuit U13 in the same way of power tube state of a control signal PWM1 on the first brachium pontis; U14 is reverse drive gate circuit, therefore PWM1(U14)=0, PWM2(U14)=1; PWM1(U13) and PWM2(U14) carry out " line with " operate, acquisition control signal PWM1! 2=1; PWM2(U13) and PWM1(U14) carry out " line with " operate, acquisition control signal PWM2! 1=0; By control signal PWM1! 2 and PWM2! 1 by U15 reverse drive gate circuit, obtains PWMA1=0, PWMA2=1.Namely original signal is PWM1=1, PWM2=0, and namely going up power tube is open state, and lower power tube is off status.After a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through of the present invention, because power model on off state is antilogical, therefore PWMA1=0 is open state, and PWMA2=1 is off status.
When power model is in spectral artifacts state of a control, as PWM1=1, PWM2=1, and upper and lower power tube leads directly to; Because U13 is open collector driving gate in the same way, therefore its output signal is identical with original signal state, so PWM1(U13)=1, PWM2(U13)=1; U14 is reverse drive gate circuit, therefore PWM1(U14)=0, PWM2(U14)=0; PWM1(U13) and PWM2(U14) carry out " line with " operate, acquisition control signal PWM1! 2=0; PWM2(U13) and PWM1(U14) carry out " line with " operate, acquisition control signal PWM2! 1=0; By control signal PWM1! 2 and PWM2! 1 by U15 reverse drive gate circuit, obtains PWMA1=1, PWMA2=1.Namely original signal is PWM1=1, PWM2=1, it is brachium pontis lower power tube pass-through state, after a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through of the present invention, PWMA1 is high signal, namely power tube is off status, PWMA2 is high signal, and power tube is off status, and the situation avoiding same brachium pontis lower power tube straight-through occurs.
Claims (5)
1. the safety circuit preventing power model from driving brachium pontis lower power tube straight-through, it is characterized in that: comprise interlocking signal circuit (1) and signal restoring circuit (2), control in the safety circuit of three brachium pontis power models, the concrete structure of interlocking signal circuit (1) is: on the first brachium pontis, power tube state of a control signal PWM1 is connected with reverse swing door circuit U 14 first input end A1 with gate circuit U13 first input end A1 in the same way simultaneously; Under first brachium pontis, power tube state of a control signal PWM2 is connected with reverse swing door circuit U 14 second input A2 with gate circuit U13 second input A2 in the same way simultaneously; On second brachium pontis, power tube state of a control signal PWM3 is connected with reverse swing door circuit U 14 the 3rd input A3 with gate circuit U13 the 3rd input A3 in the same way simultaneously; Under second brachium pontis, power tube state of a control signal PWM4 is connected with reverse swing door circuit U 14 four-input terminal A4 with gate circuit U13 four-input terminal A4 in the same way simultaneously; On 3rd brachium pontis, power tube state of a control signal PWM5 is connected with reverse swing door circuit U 14 the 5th input A5 with gate circuit U13 the 5th input A5 in the same way simultaneously; Under 3rd brachium pontis, power tube state of a control signal PWM6 is connected with reverse swing door circuit U 14 the 6th input A6 with gate circuit U13 the 6th input A6 in the same way simultaneously; Gate circuit U13 first output Y1 and reverse swing door circuit U 14 second output Y2 is connected on the power supply branch road with resistance R17 jointly in the same way, and formation control signal PWM1! 2; Gate circuit U13 second output Y2 and reverse swing door circuit U 14 first output Y1 is connected on the power supply branch road with resistance R16 jointly in the same way, and formation control signal PWM2! 1; Gate circuit U13 the 3rd output Y3 and reverse swing door circuit U 14 the 4th output Y4 is connected on the power supply branch road with resistance R15 jointly in the same way, and formation control signal PWM3! 4; Gate circuit U13 the 4th output Y4 and reverse swing door circuit U 14 the 3rd output Y3 is connected on the power supply branch road with resistance R14 jointly in the same way, and formation control signal PWM4! 3; Gate circuit U13 the 5th output Y5 and reverse swing door circuit U 14 the 6th output Y6 is connected on the power supply branch road with resistance R18 jointly in the same way, and formation control signal PWM5! 6; Gate circuit U13 the 6th output Y6 and reverse swing door circuit U 14 the 5th output Y5 is connected on the power supply branch road with resistance R19 jointly in the same way, and formation control signal PWM6! 5; The VCC port of gate circuit U13 is all connected with power supply with the VCC port of reverse swing door circuit U 14 in the same way; The GND port of gate circuit U13 and the GND port of reverse swing door circuit U 14 are all connected to the ground in the same way; Control in the safety circuit of three brachium pontis power models, the concrete structure of signal restoring circuit (2) is: control signal PWM1! 2, PWM2! 1, PWM3! 4, PWM6! 5, PWM5! 6 and PWM4! 3 first input end A1, the second input A2 being connected respectively to reverse swing door circuit U 15, the 3rd input A3, four-input terminal A4, the 5th input A5 and the 6th input A6; Power supply branch road with resistance R24 is connected to the first output Y1 of reverse swing door circuit U 15, and the upper power tube control signal PWMA1 of formation control first brachium pontis; Power supply branch road with resistance R23 is connected to the second output Y2 of reverse swing door circuit U 15, and the lower power tube control signal PWMA2 of formation control first brachium pontis; Power supply branch road with resistance R22 is connected to the 3rd output Y3 of reverse swing door circuit U 15, and the upper power tube control signal PWMA3 of formation control second brachium pontis; Power supply branch road with resistance R21 is connected to the 4th output Y4 of reverse swing door circuit U 15, and the lower power tube control signal PWMA6 of formation control the 3rd brachium pontis; Power supply branch road with resistance R26 is connected to the 5th output Y5 of reverse swing door circuit U 15, and the upper power tube control signal PWMA5 of formation control the 3rd brachium pontis; Power supply branch road with resistance R25 is connected to the 6th output Y6 of reverse swing door circuit U 15, and the lower power tube control signal PWMA4 of formation control second brachium pontis; The VCC port of gate circuit U15 is connected with power supply in the same way; The GND port of gate circuit U13 is connected to the ground in the same way.
2. a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through according to claim 1, is characterized in that: described power supply branch road power supply is 5V, and power supply is 5V.
3. a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through according to claim 1, is characterized in that: the resistance of described R14, R15, R16, R17, R18 and R19 is 4.7k Ω; The resistance of described R21, R22, R23, R24, R25 and R26 is 4.7k Ω.
4. a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through according to claim 1, is characterized in that: described U13 model is 74LS7407.
5. a kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through according to claim 1, is characterized in that: described U14 and U15 model is 74LS7406.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210231244.1A CN103532362B (en) | 2012-07-04 | 2012-07-04 | A kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210231244.1A CN103532362B (en) | 2012-07-04 | 2012-07-04 | A kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through |
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| CN103532362A CN103532362A (en) | 2014-01-22 |
| CN103532362B true CN103532362B (en) | 2016-01-27 |
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| CN111244900A (en) * | 2020-03-24 | 2020-06-05 | 合肥巨一动力系统有限公司 | Active protection loop of motor controller |
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| CN200983562Y (en) * | 2006-12-14 | 2007-11-28 | 谢步明 | Converter dead area generation circuit |
| CN201247956Y (en) * | 2008-07-04 | 2009-05-27 | 江西省电力科学研究院 | Logic apparatus for processing dead zone of electric energy quality adjustor |
| CN201294458Y (en) * | 2008-09-28 | 2009-08-19 | 深圳市同洲电子股份有限公司 | Bridge type converter capable of preventing bridge arm from direct connection and electronic equipment |
| CN202282730U (en) * | 2011-11-11 | 2012-06-20 | 山东新风光电子科技发展有限公司 | Upper and lower bridge interlocking circuit in two-level inverter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6859087B2 (en) * | 2002-10-31 | 2005-02-22 | International Rectifier Corporation | Half-bridge high voltage gate driver providing protection of a transistor |
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2012
- 2012-07-04 CN CN201210231244.1A patent/CN103532362B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200983562Y (en) * | 2006-12-14 | 2007-11-28 | 谢步明 | Converter dead area generation circuit |
| CN201247956Y (en) * | 2008-07-04 | 2009-05-27 | 江西省电力科学研究院 | Logic apparatus for processing dead zone of electric energy quality adjustor |
| CN201294458Y (en) * | 2008-09-28 | 2009-08-19 | 深圳市同洲电子股份有限公司 | Bridge type converter capable of preventing bridge arm from direct connection and electronic equipment |
| CN202282730U (en) * | 2011-11-11 | 2012-06-20 | 山东新风光电子科技发展有限公司 | Upper and lower bridge interlocking circuit in two-level inverter |
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