CN108418439A - A kind of driving built-in power of band isolation - Google Patents
A kind of driving built-in power of band isolation Download PDFInfo
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- CN108418439A CN108418439A CN201810457213.5A CN201810457213A CN108418439A CN 108418439 A CN108418439 A CN 108418439A CN 201810457213 A CN201810457213 A CN 201810457213A CN 108418439 A CN108418439 A CN 108418439A
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- 238000002955 isolation Methods 0.000 title claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
- H02M3/3376—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
- H02M3/3378—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
Present invention relates particularly to a kind of driving built-in powers of band isolation, including sequentially connected triode of recommending is to the PWM drive circuit of pipe, asymmetry half-bridge circuit, voltage doubling rectifing circuit and bleeder circuit.It includes pwm chip UC3845 to the PWM drive circuit of pipe to recommend triode, and providing constant switching frequency for triode controls signal.The main circuit of asymmetry half-bridge circuit and transformer primary side；Voltage doubling rectifing circuit and bleeder circuit are the secondary circuit after transformer isolation, and secondary circuit is mutually isolated two-way same circuits, is DC voltage by transformer secondary pulse voltage voltage multiplying rectifier.DC voltage is divided into 16V and 10V by bleeder circuit, voltage-stabiliser tube and resistance, and the tie point of voltage-stabiliser tube and resistance is reference point VE.The present invention can make simple circuit and at low cost using transformer isolation and output multi-channel power supply；DC voltage is divided into IGBT using voltage-stabiliser tube partial pressure and controls available positive/negative-pressure, the demand of the control power supply of IGBT is realized with minimum device.
Description
Technical field
The present invention relates to the power units of IGBT drive circuit, and in particular to a kind of driving built-in power of band isolation.
Background technology
The driving circuit of IGBT is the indispensable part of high-power converter, it controls the main of power circuit and changes
Stream device IGBT's opening and turning off, for realizing its scheduled function.The performance of driving circuit directly affects the normal of product
Operation.
Existing market is increasingly competitive, and low cost is with high reliability to product design no less important.Due to opening for IGBT
It is logical to be respectively necessary for providing reliable positive pressure and negative pressure with shutdown, and control section generally requires electrically with the parts powerful IGBT
It is isolated to ensure safety and reliability, these all propose high requirement to the power supply of IGBT drive parts.Especially in three level
The application scenario of topological structure, it is only single-phase just to there are 4 IGBT to need to control, compared with half-bridge topology 2 IGBT more than one times, per road drive
It is dynamic to be both needed to that more compact and succinct hardware circuit is needed to improve the power density of product using the power supply being isolated all the way.Cause
This needs a kind of simple circuit, at low cost, while can take into account the driving power circuit of reliability again.
Invention content
1, technical problem to be solved：
For problem set forth above, the present invention provides a kind of simple circuit, at low cost, while can take into account the driving of reliability again
Power circuit.In the method, using uneven half-bridge circuit by transformer isolation, voltage-multiplying circuit rectification is isolated straight
Galvanic electricity source, then DC power supply is obtained into stable positive-negative power by the partial pressure of voltage-stablizer and resistance.One transformer secondary
For two-way, the power supply of two-way isolation can be provided simultaneously, keep circuit more succinct.
2, technical solution：
A kind of driving built-in power of band isolation, including the sequentially connected PWM drive circuit for recommending triode to pipe, asymmetry
Half-bridge circuit, voltage doubling rectifing circuit and bleeder circuit.
It is described that recommend triode include pwm chip UC3845 to the PWM drive circuit of pipe, resistance R2, R3, R5, R6,
R7, R8, capacitance C2, C3, C5 and diode D1；1 foot of the pwm chip UC3845 connects one end of R7, the other end of R7
Ground connection；2 feet of the pwm chip UC3845 connect one end of R8, the other end ground connection of R8；3 feet of UC3845 connect the one of R5
End, the other end ground connection of R5；8 feet of the pwm chip UC3845 connect one end of R6, another termination capacitor C5 of R6, electricity
Hold the other end ground connection of C5；The tie point of R6 and C5 is connected to 4 feet of UC3845；5 feet of the pwm chip UC3845 connect
7 feet on ground, pwm chip UC3845 connect power supply, and 6 feet of pwm chip UC3845 connect resistance R2, C3, D1 simultaneously
One end, the other end ground connection of D1, R2 and the another of C3 terminate in asymmetry half-bridge circuit, while another termination R3 of R2 and C3
One end, R3 the other end ground connection；A termination power of capacitance C2, other end ground connection.
The asymmetry half-bridge circuit includes a pair of of triode to pipe Q1, Q2, resistance R1, R4, capacitance C1, C4；Wherein three
Pole pipe Q1 is NPN triode；Triode Q2 is PNP triode.
The base stage of described Q1, Q2 recommend the other end of the triode to R2 and C3 in the PWM drive circuit of pipe with described
It is connected；A termination power of capacitance C1, other end ground connection；A termination power of resistance R1, the poles c of another termination Q1；Triode
The poles e of Q1 are extremely connected with the e of Q2, and tie point is connected to the first binding post of the main circuit of the primary side of transformer；The poles c of Q2 and electricity
The one end for hindering R4 is connected, the other end ground connection of resistance R4；Capacitance C4 mono- terminates the second wiring of the main circuit of the primary side of transformer
Column, other end ground connection.
Transformer secondary is the identical output voltage circuit that at least two-way is mutually isolated, provides at least two-way isolation
Driving output voltage；Include voltage doubling rectifing circuit and bleeder circuit per output voltage circuit all the way.
Include 3 capacitances C6, C7, C8,2 general-purpose diodes per the voltage doubling rectifing circuit in output voltage circuit all the way
D2、D3；Include a zener diode D4 and resistance R9 per the bleeder circuit in all the way；Connection type is specially：Capacitance C6 mono-
The Same Name of Ends of transformer secondary is terminated, the other end connects the cathode of the anode of D2, one end of C7, C8, D3 simultaneously；The cathode of D2,
The other end of C7 connects together as the anode of the DC power supply of output；The anode of D3, the other end of C8 connect together, and and transformation
The different name end on device pair side is connected to the cathode of the DC power supply of output；Zener diode D4 is connected in parallel on D2, the both ends of C7, wherein
The anode of D4 is connected with the anode of D2, and resistance R9 is connected in parallel on D3, the both ends of C8.
Further, magnet ring used in the transformer is LP3 magnet rings.
3, advantageous effect：
（1）The present invention can make simple circuit and at low cost using transformer isolation and output multi-channel power supply.
（2）It is divided using voltage-stabiliser tube in the present invention and DC voltage is divided into the available positive/negative-pressure of IGBT controls, with minimum
Device realizes the demand of the control power supply of IGBT.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Specific implementation mode
The technology of the present invention content is explained below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of driving built-in power of band isolation of the present invention, including PWM drive circuit of the triode to pipe is recommended,
Asymmetry half-bridge circuit, voltage doubling rectifing circuit and bleeder circuit.
It is described that recommend triode include pwm chip UC3845 to the PWM drive circuit of pipe, resistance R2, R3, R5, R6, R7,
R8, capacitance C2, C3, C5 and diode D1；1 foot of the pwm chip UC3845 connects one end of R7, another termination of R7
Ground；2 feet of the pwm chip UC3845 connect one end of R8, the other end ground connection of R8；3 feet of UC3845 connect one end of R5,
The other end of R5 is grounded；8 feet of the pwm chip UC3845 meet one end of R6, another termination capacitor C5, capacitance C5 of R6
The other end ground connection；The tie point of R6 and C5 is connected to 4 feet of UC3845；5 feet of the pwm chip UC3845 are grounded, PWM
7 feet of control chip UC3845 connect power supply, and 6 feet of pwm chip UC3845 connect one end of resistance R2, C3, D1, D1 simultaneously
The other end ground connection, R2 and the another of C3 terminate in asymmetry half-bridge circuit, while one end of another termination R3 of R2 and C3,
The other end of R3 is grounded；A termination power of capacitance C2, other end ground connection.
The asymmetry half-bridge circuit includes a pair of of triode to pipe Q1, Q2, resistance R1, R4, capacitance C1, C4；Wherein three
Pole pipe Q1 is NPN triode；Triode Q2 is PNP triode.
The base stage of described Q1, Q2 recommend the other end of the triode to R2 and C3 in the PWM drive circuit of pipe with described
It is connected；A termination power of capacitance C1, other end ground connection；A termination power of resistance R1, the poles c of another termination Q1；Triode
The poles e of Q1 are extremely connected with the e of Q2, and tie point is connected to the first binding post of the main circuit of the primary side of transformer；The poles c of Q2 and electricity
The one end for hindering R4 is connected, the other end ground connection of resistance R4；Capacitance C4 mono- terminates the second wiring of the main circuit of the primary side of transformer
Column, other end ground connection.
Transformer secondary is the identical output voltage circuit that at least two-way is mutually isolated, provides at least two-way isolation
Driving output voltage；Include voltage doubling rectifing circuit and bleeder circuit per output voltage circuit all the way.
Include 3 capacitances C6, C7, C8,2 general-purpose diodes per the voltage doubling rectifing circuit in output voltage circuit all the way
D2、D3；Include a zener diode D4 and resistance R9 per the bleeder circuit in all the way；Connection type is specially：Capacitance C6 mono-
The Same Name of Ends of transformer secondary is terminated, the other end connects the cathode of the anode of D2, one end of C7, C8, D3 simultaneously；The cathode of D2,
The other end of C7 connects together as the anode of the DC power supply of output；The anode of D3, the other end of C8 connect together, and and transformation
The different name end on device pair side is connected to the cathode of the DC power supply of output；Zener diode D4 is connected in parallel on D2, the both ends of C7, wherein
The anode of D4 is connected with the anode of D2, and resistance R9 is connected in parallel on D3, the both ends of C8.
I is the PWM drive circuit for recommending triode to pipe in foregoing circuit, and constant switching frequency is provided for triode
Control signal.II is the main circuit of asymmetry half-bridge circuit and transformer primary side.III is the secondary side electricity after transformer isolation
Road, secondary circuit are mutually isolated two-way same circuits, are DC voltage by transformer secondary pulse voltage voltage multiplying rectifier.VI
For bleeder circuit, DC voltage is divided into 16V and -10V by voltage-stabiliser tube and resistance, and the tie point of voltage-stabiliser tube and resistance is reference point
VE。
Further, magnet ring used in the transformer is LP3 magnet rings.
Although the present invention has been described by way of example and in terms of the preferred embodiments, they be not it is for the purpose of limiting the invention, it is any to be familiar with this
Those skilled in the art can make various changes or retouch from working as without departing from the spirit and scope of the invention, therefore the protection model of the present invention
Enclosing should be subject to what claims hereof protection domain was defined.
Claims (2)
1. a kind of driving built-in power of band isolation, it is characterised in that：The PWM of pipe is driven including sequentially connected triode of recommending
Dynamic circuit, asymmetry half-bridge circuit, voltage doubling rectifing circuit and bleeder circuit；
It is described that recommend triode include pwm chip UC3845 to the PWM drive circuit of pipe, resistance R2, R3, R5, R6, R7,
R8, capacitance C2, C3, C5 and diode D1；1 foot of the pwm chip UC3845 connects one end of R7, another termination of R7
Ground；2 feet of the pwm chip UC3845 connect one end of R8, the other end ground connection of R8；3 feet of UC3845 connect one end of R5,
The other end of R5 is grounded；8 feet of the pwm chip UC3845 meet one end of R6, another termination capacitor C5, capacitance C5 of R6
The other end ground connection；The tie point of R6 and C5 is connected to 4 feet of UC3845；5 feet of the pwm chip UC3845 are grounded, PWM
7 feet of control chip UC3845 connect power supply, and 6 feet of pwm chip UC3845 connect one end of resistance R2, C3, D1, D1 simultaneously
The other end ground connection, R2 and the another of C3 terminate in asymmetry half-bridge circuit, while one end of another termination R3 of R2 and C3,
The other end of R3 is grounded；A termination power of capacitance C2, other end ground connection；
The asymmetry half-bridge circuit includes a pair of of triode to pipe Q1, Q2, resistance R1, R4, capacitance C1, C4；Wherein triode
Q1 is NPN triode；Triode Q2 is PNP triode；
The base stage of described Q1, Q2 are connected to the R2 in the PWM drive circuit of pipe with the other end of C3 with the triode of recommending；
A termination power of capacitance C1, other end ground connection；A termination power of resistance R1, the poles c of another termination Q1；The e of triode Q1
Pole is extremely connected with the e of Q2, and tie point is connected to the first binding post of the main circuit of the primary side of transformer；The poles c of Q2 and resistance R4
One end be connected, the other end of resistance R4 ground connection；Capacitance C4 mono- terminates the second binding post of the main circuit of the primary side of transformer, separately
One end is grounded；
Transformer secondary is the identical output voltage circuit that at least two-way is mutually isolated, provides the drive of at least two-way isolation
Dynamic output voltage；Include voltage doubling rectifing circuit and bleeder circuit per output voltage circuit all the way；
Voltage doubling rectifing circuit in per output voltage circuit all the way includes 3 capacitance C6, C7, C8,2 general-purpose diodes D2, D3；
Include a zener diode D4 and resistance R9 per the bleeder circuit in all the way；Connection type is specially：The terminations of capacitance C6 mono- become
The Same Name of Ends on depressor pair side, the other end connect the cathode of the anode of D2, one end of C7, C8, D3 simultaneously；The cathode of D2, C7 it is another
One end connects together as the anode of the DC power supply of output；The anode of D3, the other end of C8 connect together, and and transformer secondary
Different name end be connected to output DC power supply cathode；Zener diode D4 is connected in parallel on D2, the both ends of C7, the wherein sun of D4
Pole is connected with the anode of D2, and resistance R9 is connected in parallel on D3, the both ends of C8.
2. a kind of driving built-in power of band isolation according to claim 1, it is characterised in that：Magnetic used in the transformer
Ring is LP3 magnet rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810457213.5A CN108418439A (en) | 2018-05-14 | 2018-05-14 | A kind of driving built-in power of band isolation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810457213.5A CN108418439A (en) | 2018-05-14 | 2018-05-14 | A kind of driving built-in power of band isolation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108418439A true CN108418439A (en) | 2018-08-17 |
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ID=63139126
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810457213.5A Withdrawn CN108418439A (en) | 2018-05-14 | 2018-05-14 | A kind of driving built-in power of band isolation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190732A (en) * | 2019-04-15 | 2019-08-30 | 华中科技大学 | A kind of power supply and driving circuit of driving chip |
-
2018
- 2018-05-14 CN CN201810457213.5A patent/CN108418439A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190732A (en) * | 2019-04-15 | 2019-08-30 | 华中科技大学 | A kind of power supply and driving circuit of driving chip |
| CN110190732B (en) * | 2019-04-15 | 2020-06-09 | 华中科技大学 | Power supply and drive circuit of drive chip |
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Application publication date: 20180817 |
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| WW01 | Invention patent application withdrawn after publication |