CN103916117B - Magnetic coupling isolation drive circuit - Google Patents
Magnetic coupling isolation drive circuit Download PDFInfo
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- CN103916117B CN103916117B CN201410122833.5A CN201410122833A CN103916117B CN 103916117 B CN103916117 B CN 103916117B CN 201410122833 A CN201410122833 A CN 201410122833A CN 103916117 B CN103916117 B CN 103916117B
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- Prior art keywords
- triode
- trigger
- driving transformer
- door
- transformer
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- 238000002955 isolation Methods 0.000 title claims abstract description 19
- 230000008878 coupling Effects 0.000 title claims abstract description 15
- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 15
- 238000007596 consolidation process Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000005389 magnetism Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The invention discloses a magnetic coupling isolation drive circuit which comprises a duty ratio frequency dividing circuit, a transformer isolating circuit and a duty ratio combining circuit. The technology of duty ratio frequency division is adopted, and the effects that a drive transformer is capable of being restored in magnetism, stable in amplitude and high in driving capability can be ensured. The magnetic coupling isolation drive circuit is needless for devices and circuits to be added to carry out magnetism restoration on the drive transformer, more accurate and more stable in drive waveform, simple in circuit topology, few in active power device, small in size, little in loss, easy to achieved, simple in circuit device, low in cost, high in stability and driving capability and the like.
Description
Technical field：
The present invention relates to a kind of magnetic coupling isolated drive circuit, the drive circuit in category Power Electronic Technique.
Background technology：
With the development of Power Electronic Technique, transformer isolation drive circuit has obtained extensive research and application, while
Some specific occasions also propose requirement higher to transformer isolation drive circuit：When dutycycle is more than 0.5, how to solve
The problems such as certainly driving transformer driving force is not enough.Magnetic coupling isolated drive circuit (Magnetic coupling isolating
Drive circuit, hereinafter referred to as MCIDC) it is a kind of topological structure that can be solved the above problems very well, relative to traditional
Transformer drive circuit, the drive circuit has a good dutycycle amplitude stability, and simple structure, be lost it is smaller, be easy to
Realize.Dutycycle separate section controls accurate, waveform stabilization, loss smaller by digital circuit simultaneously, is that one kind has very much
The topological structure of researching value and development prospect.
The content of the invention：
The present invention provides a kind of magnetic coupling isolated drive circuit, and it uses new magnetic coupling technology to solve magnetic coupling isolation and drives
Dynamic circuit when dutycycle is more than 0.5, the hypodynamic problem of driving energy.
The present invention is adopted the following technical scheme that：A kind of magnetic coupling isolated drive circuit, it includes duty ratio frequency, becomes
Depressor isolation circuit, dutycycle consolidation circuit, the duty ratio frequency include the first trigger D1, the second trigger D2,
First with door A1, second and door A2, the first triode S1, the second triode S2, the 3rd triode S3, the 4th triode S4；Become
Depressor isolation circuit includes the first capacitance C1, the first driving transformer T1, the second capacitance C2, the second driving transformer
T2, first resistor R1, second resistance R2；Dutycycle consolidation circuit includes the first OR gate O1, the 5th triode S5, the 6th triode
S6；Wherein the dutycycle input PWM1 and the first trigger D1 of PWM ripples, the clock end of the second trigger D2 are connected；PWM ripples are accounted for
It is empty to be connected with one end of the input of door A2 with first with door A1, second respectively than input PWM1；The non-ends of Q of the second trigger D2
D ends with the second trigger D2 are connected；The Q ends of the second trigger D2 are connected with the D ends of the first trigger D1；Second trigger D2
Q ends and second be connected with the other end of the input of door A2；The input of the Q ends of the first trigger D1 and first and door A1
The other end is connected；First is connected with door A1 output ends and the first triode S1, the base stage of the second triode S2；Second is defeated with door A2
Go out end to be connected with the base stage of the 3rd triode S3, the 4th triode S4；First triode S1, the colelctor electrode of the 3rd triode S3 and
First external power supply Vcc is connected；With the first capacitance C1's after the emitter stage connection of the first triode S1, the second triode S2
One end is connected；It is connected with one end of the second capacitance C2 after 3rd triode S3, the emitter stage connection of the 4th triode S4；The
Two triode S2, the colelctor electrode of the 4th triode S4 and the first external power supply ground GND are connected；The other end of the first capacitance C1
Connect the primary side upside of the first driving transformer T1；The one end that makes of second capacitance C2 is connected in the primary side of driving transformer T2
Side；First driving transformer T1, the downside of the second driving transformer T2 are connected with the first external power supply ground GND；First drives change
The secondary upside of depressor T1 connects one end of first resistor R1；The secondary upside of the second driving transformer T2 connects second resistance R2
One end；The second external power supply of secondary downside connection ground Vc- of the first driving transformer T1；The secondary of the second driving transformer T2
Downside connects the second external power supply ground Vc-；The secondary downside of the first driving transformer T1 connects the other end of first resistor R1；The
The secondary downside of two driving transformer T2 connects the other end of second resistance R2；The secondary upside connection of the first driving transformer T1
The input of the first OR gate O1；The other end of the input of the first OR gate O1 of secondary upside connection of the second driving transformer T2；
The output end of the first OR gate O1 is connected with the base stage of the 5th triode S5, the 6th triode S6；The colelctor electrode of the 5th triode S5
It is connected with the second external power supply Vc+；The emitter stage of the 5th triode S5 and the connected rear and duty of the emitter stage of the 6th triode S6
One end than output end Qg is connected；The colelctor electrode of the 6th triode S6 and the second external power supply ground Vc- are connected.
The present invention is that realization transformer isolation drives, and dutycycle can be more than 0.5 drive circuit, have the following advantages that：
(1) magnetic recovery need not be carried out to driving transformer with additional device and circuit；
(2) with the introducing of digital device, drive waveforms are more accurate, stabilization；
(3) circuit topology is simple, and active power device is few, small volume, and loss is few, it is easy to accomplish；
(4) circuit devcie is simple, and low cost, small volume, good stability, driving force is strong.
Brief description of the drawings：
Fig. 1 for it is of the invention it is achievable use magnetic coupling isolation drive, dutycycle can be more than 0.5 drive circuit schematic diagram.
Fig. 2 (a) and 2 (b) achievable use the magnetic coupling isolation drive, dutycycle can be more than 0.5 driving electricity for of the invention
Each operation mode schematic diagram in road.
Wherein：
1- duty ratio frequencies；2- transformer isolation circuits；3- dutycycle consolidation circuits；The D of D1, D2-- first, second
Trigger；A1, A2-- first, second and door；S1~S6-- first~the 6th triode；The blocking of C1, C2-- first, second electricity
Hold；The driving transformer of T1, T2-- first, second；First~second resistances of R1~R2--；The OR gates of O1-- first；PWM1-- duties
Than input；Qg-- dutycycle output ends；The external power supplys of Vcc-- first；The external power supplys of Vc+-- second；The external power supplys of GND-- first
Ground；The external power supplys of Vc--- second ground.
Specific embodiment：
Refer to shown in Fig. 1, realization of the present invention is driven with transformer isolation, dutycycle can be more than 0.5 drive circuit, bag
Duty ratio frequency 1, transformer isolation circuit 2, dutycycle consolidation circuit 3 are included, wherein duty ratio frequency 1 includes first
Trigger D1, the second trigger D2, first and door A1, second and door A2, the first triode S1, the second triode S2, the three or three
Pole pipe S3, the 4th triode S4；Transformer isolation circuit 2 include the first capacitance C1, the first driving transformer T1, second every
Straight electric capacity C2, the second driving transformer T2, first resistor R1, second resistance R2；Dutycycle consolidation circuit 3 includes the first OR gate
O1, the 5th triode S5, the 6th triode S6.Wherein dutycycle input PWM1 and the first trigger D1, second triggering of PWM ripples
The clock end of device D2 is connected；The dutycycle input PWM1 of PWM ripples is respectively with first and the one of the input of door A1, second and door A2
End is connected；The non-ends of Q of the second trigger D2 are connected with the D ends of the second trigger D2；The Q ends of the second trigger D2 and the first triggering
The D ends of device D1 are connected；The Q ends of the second trigger D2 and second are connected with the other end of the input of door A2；First trigger D1
Q ends and first be connected with the other end of the input of door A1；First with door A1 output ends and the first triode S1, the two or three pole
The base stage of pipe S2 is connected；Second is connected with door A2 output ends and the 3rd triode S3, the base stage of the 4th triode S4；One or three pole
Pipe S1, the colelctor electrode of the 3rd triode S3 and the first external power supply Vcc are connected；First triode S1, the hair of the second triode S2
It is connected with one end of the first capacitance C1 after emitter-base bandgap grading connection；After 3rd triode S3, the emitter stage connection of the 4th triode S4
One end with the second capacitance C2 is connected；Second triode S2, the colelctor electrode of the 4th triode S4 and the first external power supply ground
GND is connected；The other end of the first capacitance C1 connects the primary side upside of the first driving transformer T1；Second capacitance C2's
One end is made to connect the primary side upside of driving transformer T2；First driving transformer T1, the downside of the second driving transformer T2 and
One external power supply ground GND is connected；The secondary upside of the first driving transformer T1 connects one end of first resistor R1；Second drives change
The secondary upside of depressor T2 connects one end of second resistance R2；The second external electricity of secondary downside connection of the first driving transformer T1
Source ground Vc-；The second external power supply of secondary downside connection ground Vc- of the second driving transformer T2；The pair of the first driving transformer T1
Side downside connects the other end of first resistor R1；The secondary downside of the second driving transformer T2 connects the another of second resistance R2
End；The input of the first OR gate O1 of secondary upside connection of the first driving transformer T1；On the secondary of the second driving transformer T2
Side connects the other end of the input of the first OR gate O1；The output end and the 5th triode S5, the 6th triode of the first OR gate O1
The base stage of S6 is connected；The colelctor electrode of the 5th triode S5 and the second external power supply Vc+ are connected；The emitter stage of the 5th triode S5 and
The emitter stage of the 6th triode S6 is connected after being connected with one end of dutycycle output end Qg；The colelctor electrode of the 6th triode S6 and
Two external power supplys ground Vc- is connected.
Realization of the present invention is driven with transformer isolation, and the drive circuit that dutycycle can be more than 0.5 is broadly divided into two works
Make interval：1st, during the Q ends output high level of the first trigger D1, the Q ends output low level of the second trigger D2, the first trigger
The Q ends of D1 export through first with door A1 and dutycycle be input into PWM1 phases with after by high level output to the first triode S1, second
High level is passed to the first capacitance by the base stage of triode S2, the first triode S1, the emitter stage of the second triode S2 again
High level is passed to the first driving transformer T1 by C1, the first capacitance C1, and the first driving transformer T1 is through the first OR gate O1
Input be input into and with another input phases of O1 or after by high level output to the 5th triode S5, the 6th triode S6 base
The high level of the second external power supply Vc+ is delivered to Qg ends by pole, the 5th triode S5, the emitter stage of the 6th triode S6 again；
2nd, during the Q ends output high level of the second trigger D2, the Q ends output low level of the first trigger D1, the Q ends of the second trigger D2
Export through second with door A2 and dutycycle be input into PWM1 phases with after by high level output to the 3rd triode S3, the 4th triode S4
Base stage, high level passes to the second capacitance C2 by the 3rd triode S3, the emitter stage of the 4th triode S4 again, second every
High level is passed to the second driving transformer T2, the second driving transformer T2 and is input into through the first OR gate O1 inputs by straight electric capacity C2
And with another input phases of O1 or after by high level output to the 5th triode S5, the 6th triode S6 base stage, the five or three pole
The high level of the second external power supply is delivered to Qg ends by pipe S5, the emitter stage of the 6th triode S6 again.
Main circuit structure is shown with Fig. 1 below, magnetic coupling isolation drive of the invention is described with reference to Fig. 2 (a) and 2 (b)
The operation principle and operation mode of circuit.
1. operation mode 1：During the Q ends output high level of the first trigger D1, the Q ends of the second trigger D2 export low electricity
It is flat, the Q ends of the first trigger D1 export through first with door A1 and dutycycle input PWM1 phases with after by high level output to first
The base stage of triode S1, the second triode S2, the first triode S1, the emitter stage of the second triode S2 again pass to high level
High level is passed to the first driving transformer T1, the first driving transformer T1 by the first capacitance C1, the first capacitance C1
The high level output of dutycycle is given the base stage of the 5th triode S5 and the 6th triode S6, the 5th triode through the first OR gate O1
The high level of the second external power supply Vc+ is passed to Qg ends by the emitter stage of S5 and the 6th triode S6 again.
2nd, operation mode 2：During the Q ends output high level of the second trigger D2, the Q ends of the first trigger D1 export low electricity
It is flat, the Q ends of the second trigger D2 export through second with door A2 and dutycycle input PWM1 phases with after by high level output to the 3rd
The base stage of triode S3, the 4th triode S4, the 3rd triode S3, the emitter stage of the 4th triode S4 again pass to high level
High level is passed to the second driving transformer T2, the second driving transformer T2 by the second capacitance C2, the second capacitance C2
Through the high level output of dutycycle to be given the base stage of the 5th triode S5 and the 6th triode S6, the five or three pole through the first OR gate O1
The high level of the second external power supply Vc+ is passed to Qg ends by the emitter stage of pipe S5 and the 6th triode S6 again.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, some improvement can also be made under the premise without departing from the principles of the invention, these improvement also should be regarded as of the invention
Protection domain.
Claims (1)
1. a kind of magnetic coupling isolated drive circuit, it includes duty ratio frequency（1）, transformer isolation circuit（2）, dutycycle
Consolidation circuit（3）, it is characterised in that：The duty ratio frequency（1）Including the first trigger（D1）, the second trigger
（D2）, first and door（A1）, second and door（A2）, the first triode（S1）, the second triode（S2）, the 3rd triode（S3）、
4th triode（S4）；Transformer isolation circuit（2）Including the first capacitance（C1）, the first driving transformer（T1）, second
Capacitance（C2）, the second driving transformer（T2）, first resistor（R1）, second resistance（R2）；Dutycycle consolidation circuit（3）Bag
Include the first OR gate（O1）, the 5th triode（S5）, the 6th triode（S6）；The wherein dutycycle input of PWM ripples（PWM1）With
One trigger（D1）, the second trigger（D2）Clock end be connected；The dutycycle input of PWM ripples（PWM1）Respectively with first and door
（A1）, second and door（A2）Input one end be connected；Second trigger（D2）The non-ends of Q and the second trigger（D2）D
End is connected；Second trigger（D2）Q ends and the first trigger（D1）D ends be connected；Second trigger（D2）Q ends and second
With door（A2）Input the other end be connected；First trigger（D1）Q ends and first and door（A1）Input it is another
End is connected；First and door（A1）Output end and the first triode（S1）, the second triode（S2）Base stage be connected；Second and door
（A2）Output end and the 3rd triode（S3）, the 4th triode（S4）Base stage be connected；First triode（S1）, the 3rd triode
（S3）Colelctor electrode and the first external power supply（Vcc）It is connected；First triode（S1）, the second triode（S2）Emitter stage connection
Afterwards with the first capacitance（C1）One end be connected；3rd triode（S3）, the 4th triode（S4）Emitter stage connection after and
Second capacitance（C2）One end be connected；Second triode（S2）, the 4th triode（S4）Colelctor electrode and the first external electricity
Source ground（GND）It is connected；First capacitance（C1）The other end connect the first driving transformer（T1）Primary side upside；Second every
Straight electric capacity（C2）The other end connection driving transformer（T2）Primary side upside；First driving transformer（T1）, second drive become
Depressor（T2）Downside and the first external power supply ground（GND）It is connected；First driving transformer（T1）Secondary upside connection first
Resistance（R1）One end；Second driving transformer（T2）Secondary upside connection second resistance（R2）One end；First drives change
Depressor（T1）Secondary downside connection the second external power supply ground（Vc-）；Second driving transformer（T2）Secondary downside connection the
Two external power supplys ground（Vc-）；First driving transformer（T1）Secondary downside connection first resistor（R1）The other end；Second drives
Dynamic transformer（T2）Secondary downside connection second resistance（R2）The other end；First driving transformer（T1）Secondary upside connect
Connect the first OR gate（O1）Input；Second driving transformer（T2）Secondary upside connection the first OR gate（O1）Input
The other end；First OR gate（O1）Output end and the 5th triode（S5）, the 6th triode（S6）Base stage be connected；Five or three pole
Pipe（S5）Colelctor electrode and the second external power supply（Vc+）It is connected；5th triode（S5）Emitter stage and the 6th triode（S6）
Emitter stage be connected after and dutycycle output end（Qg）One end be connected；6th triode（S6）Colelctor electrode and second external
Power supply ground（Vc-）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410122833.5A CN103916117B (en) | 2014-03-28 | 2014-03-28 | Magnetic coupling isolation drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410122833.5A CN103916117B (en) | 2014-03-28 | 2014-03-28 | Magnetic coupling isolation drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103916117A CN103916117A (en) | 2014-07-09 |
| CN103916117B true CN103916117B (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410122833.5A Expired - Fee Related CN103916117B (en) | 2014-03-28 | 2014-03-28 | Magnetic coupling isolation drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103916117B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811745B (en) * | 2015-06-01 | 2019-03-01 | 扬州大学 | A kind of driving method of switch controlled pulse |
| CN111900863A (en) * | 2020-06-24 | 2020-11-06 | 南京理工大学 | Isolated high-duty-ratio SSPC driving circuit without independent secondary side power supply |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168182A (en) * | 1991-06-24 | 1992-12-01 | United Technologies Corporation | 0-100% duty cycle, transformer isolated fet driver |
| CN103280948A (en) * | 2013-06-05 | 2013-09-04 | 广州金升阳科技有限公司 | Impulse modulation magnetic separation drive circuit |
| CN103337963A (en) * | 2013-07-16 | 2013-10-02 | 南京航空航天大学 | Duty ratio separate-combine type isolation driving circuit for transformers |
| CN203445775U (en) * | 2013-08-28 | 2014-02-19 | 北京卫星制造厂 | Large-duty-ratio magnetic isolation drive circuit |
-
2014
- 2014-03-28 CN CN201410122833.5A patent/CN103916117B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168182A (en) * | 1991-06-24 | 1992-12-01 | United Technologies Corporation | 0-100% duty cycle, transformer isolated fet driver |
| CN103280948A (en) * | 2013-06-05 | 2013-09-04 | 广州金升阳科技有限公司 | Impulse modulation magnetic separation drive circuit |
| CN103337963A (en) * | 2013-07-16 | 2013-10-02 | 南京航空航天大学 | Duty ratio separate-combine type isolation driving circuit for transformers |
| CN203445775U (en) * | 2013-08-28 | 2014-02-19 | 北京卫星制造厂 | Large-duty-ratio magnetic isolation drive circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103916117A (en) | 2014-07-09 |
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Granted publication date: 20170517 Termination date: 20200328 |