CN107516994B - A kind of self-powered inverter IGBT driving device based on Magnetic isolation - Google Patents
A kind of self-powered inverter IGBT driving device based on Magnetic isolation Download PDFInfo
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- CN107516994B CN107516994B CN201710934745.9A CN201710934745A CN107516994B CN 107516994 B CN107516994 B CN 107516994B CN 201710934745 A CN201710934745 A CN 201710934745A CN 107516994 B CN107516994 B CN 107516994B
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/4803—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode with means for reducing DC component from AC output voltage
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- Inverter Devices (AREA)
Abstract
A kind of self-powered inverter IGBT driving device based on Magnetic isolation; its purpose is to provide a kind of inverter IGBT driving device for not needing special electric power loop offer power supply, the present invention is made of links such as power multiplier, anti-biasing circuit, Magnetic isolation transformer, rectifier, positive and negative filter, demodulator, shaping overcurrent protector, amplifiers.Magnetic isolation transformer output end is made of two groups of power coil group, signal coil group coils, they take out high frequency carrier and modulation carrier signal respectively.After modulated signal for IGBT control is mixed with the carrier signal for carrying electric flux by power multiplier, DC component is removed via the diamagnetic number of believing one side only, is sent into Magnetic isolation transformer.The driving device is based on specially designed Magnetic isolation transformer simultaneous transmission IGBT control signal and power supply carrier wave, has the characteristics that structure is simple, working frequency is high.
Description
Technical field
The present invention relates to a kind of electronic power switch member driving units, more particularly to are applied to inverter field, also
It can be used for self-powered inverter IGBT driving device of one of the various electrical system current transformers based on Magnetic isolation.
Background technique
With the fast development of high-power electric and electronic switch block, the switching device of high-power, high current, high voltage
IGBT pipe becomes the most important switching device of field of power electronics, is widely used in voltage transformation, new-energy grid-connected, motor
The application of the special power sources such as driving, inverter, electromagnetic induction heating.The structure of IGBT pipe has its particularity, it passes through
Control grid electric field change causes break-over of device or cut-off, therefore when driving the conducting of IGBT pipe, needs an intensity very
Big impulses injection electric current needs the very big pulse extraction electric current of an intensity when driving the cut-off of IGBT pipe, that is,
It says, IGBT pipe needs positive and negative two power supply power supplies in driving process.IGBT pipe is typically used in the topological structure environment of H bridge,
It is to be cooperated when work by multiple pipes, since the operating position current potential of each pipe is different, IGBT is in reality
Independent driving is needed in the application of border, that is to say, that the driving device of IGBT pipe must be mutually isolated.The spy of itself is managed in view of IGBT
Property and working environment requirement, its driving device must satisfy two fundamental technical specifications: isolation drive, positive-negative power supply
Electricity.
The IGBT drive circuit of mainstream mostly uses greatly DC-DC converter to provide the positive and negative direct current power supply of isolation, such as text at present
It offers [Huang Xianjin, Intelligent IGBT Drive Circuit research, electrotechnics journal, in April, 2005] and uses high frequency switch power to drive
Dynamic circuit power supply, this method can provide three tunnels mutually isolated+15V, -10V power supply for IGBT drive circuit.Document [Zhang Li etc.,
Intelligent IGBT drive module 2SD315A Analysis on Key Technologies, power converter technology, in January, 2009] use flyback topologies structure
At isolated form DC/DC converter, 15V power supply is converted into two-way+15V, -10V isolated power supply.In order to solve IGBT pipe needs
The problem of isolation drive, the most wide method of domestic application is using driving method of the photoelectrical coupler as isolation element at present.
Document [Hu Cong etc., a kind of IGBT drive circuit of suitable induction heating, power electronic technique, in June, 2007] describes one kind
Professional IGBT drive circuit module I XDD414CI using 6N137 as Phototube Coupling, the module can be applied to induction heating electricity
In the IGBT driving link in source；Document [application of Liu Weiming etc., photo-coupler HCPL-316J in IGBT drive circuit, air force
Radar institute journal, in June, 2008] use HCPL-316J photoelectric coupled device to devise a kind of IGBT drive as isolation original part
Dynamic circuit, the IGBT of 150A, 1200V can be driven to manage, above-mentioned work shows: using DC/DC converter can be IGBT drive circuit
Isolated power supply required for providing, but dedicated isolated power supply module increases the component number of circuit and occupies fixing body
Product；It can be very good to solve the problems, such as the isolation drive of low and medium frequency IGBT pipe using photoelectrical coupler, but due to semiconductor photosensitive
Element shows unsatisfactory in high speed operation, therefore photoelectrical coupler cannot apply the isolation drive in high-frequency I GBT pipe
In circuit.
With the development of power electronics technology, improving specific volume power density becomes the main target of power technology.For
Raising power reduces volume, and power technology is towards improving working frequency, reduce the development of component demand direction.In this back
Under scape, photoelectric coupling technology is difficult to apply in IGBT drive circuit due to being not suitable with high-frequency work condition；Become using DC/DC
Parallel operation provides the method for isolation circuit also due to occupying volume and needing to rethink method of supplying power to for IGBT drive circuit.
Summary of the invention
The purpose of the present invention is to provide a kind of IGBT driving device, this IGBT driving device is taken using magnetic coupling method
Isolation drive is realized for photoelectric coupling method, solves IGBT driving problems under the conditions of high-frequency work；Using carrying electric flux
Operating voltage required for the method that high frequency carrier is mixed with modulated signal is provided to secondary eliminates the confession of DC/DC DC isolation
Circuit, saves the occupied installation volume of the partial circuit, and device has the advantages that working frequency is high, power density is big.
The characteristics of technical solution of the present invention, is:
1, a kind of Magnetic isolation transformer device structure is proposed, the magnetic coupling channel which is constituted can be simultaneously by driving signal
Secondary channel is transmitted to by primary with electric flux；
2, a kind of method that transmission is isolated with energy for signal is proposed, this method is will to represent the modulation of IGBT driving signal
Signal and the high frequency carrier mixed modulated for carrying electric flux form the carrier signal that an existing control signal carries energy again,
Constitute mixed signal.Mixed signal is transmitted to secondary via the magnetic loop that Magnetic isolation transformer provides, and decomposes again in secondary
For modulated signal and high frequency carrier.
A kind of self-powered inverter IGBT driving device based on Magnetic isolation of the present invention, comprising: power multiplier, it is diamagnetic partially
Circuit, Magnetic isolation transformer, rectifier, filter, demodulator, shaping current foldback circuit, amplifier；The Magnetic isolation transformation
Device is made of primary coil n1, secondary coil n2, n3, n4, n5, the end to end composition centre cap power supply of coil n2, n3
Coil group, the end to end composition centre cap signal coil group of coil n4, n5, passes through magnetic core between primary coil and secondary coil
Realize magnetic coupling；The filter filters link by+filtering link with-and constitutes；The modulated signal is pwm signal, SPWM letter
Number one of with SVPWM signal, modulated signal and input signal of the high-frequency carrier signal as power multiplier pass through power
Multiplier treated signal send diamagnetic inclined processing of circuit, forms the output signal without DC component, the output signal conduct
The input signal Uin of primary coil n1；It is transformer coupled through Magnetic isolation after Uin signal inputs primary coil n1, it is transferred to secondary
Grade, the signal for being coupled to the power coil group of coil n2, n3 composition are sent to rectifier, obtain pulsating direct current after rectified device rectification
Signal；The pulsating direct current signal of rectifier output is sent to filter, via obtained after+filtering link with-filtering link filtering+
Vcc and two direct voltage outputs of-Vcc；The signal for being coupled to the signal coil group of coil n4, n5 composition is sent to demodulator, passes through
Modulated signal is restored after demodulation；The modulated signal of demodulator output is sent to shaping overcurrent protector and carries out shaping, obtains high-quality
The modulated signal of amount；The high quality SPWM signal of shaping overcurrent protector output is sent to amplifier and amplifies, and obtains enough
It is exported after power, driving IGBT pipe；IGBT pipe collector signal is introduced to the input terminal of shaping overcurrent protector, as characterization
The signal of IGBT tube current size；By+filtering link output+Vcc voltage is sent to shaping overcurrent protector and amplifier respectively,
By-filtering link output-Vcc voltage is sent to shaping overcurrent protector and amplifier respectively, as shaping overcurrent protector and
The working power of amplifier.
The power multiplier is made of basic multiplier with current driving circuit, basic multiplier by linear multiplier,
The devices such as integrated circuit multiplier, logical device, frequency mixer are constituted, and current driving circuit is made of push-pull topology circuit.
The high frequency carrier, which carries, provides the electric flux of working power for secondary, and the electric flux is through power multiplier and adjusts
Signal mixing processed, form the existing modulated signal for representing IGBT switch control information has the high-frequency carrier signal for carrying electric flux again
Mixed signal.
The Magnetic isolation transformer is completed at the same time electrical isolation, high frequency carrier electric flux takes out, modulated signal takes out three
Function, it is made of primary coil, secondary coil and magnetic core.Primary coil is single coil, and secondary coil is by two coil groups
Composition.N2 coil not marking has mark to be connected with the end at inscription end with the end for engraving end with n3, and extracting a line after being connected out is middle line, with
This connection type n2, n3 coil combination passes through magnetic coupling for receiving primary coil at the power coil group of a three lead-in wires
The high-frequency carrier signal in the mixed signal passed over is closed, obtains the electric flux of its carrying, three lead-in wires are respectively: n2 coil
Have with inscription end line end, n2 be connected with n3 line end, n3 without together inscription end line end.N4 coil end and the n5 not marked with inscription end
There is mark to be connected with the end at inscription end, one line of extraction is middle line after being connected, with this connection type n4, n5 coil combination at one
The signal coil group of three lead-in wires is believed for receiving the modulation in the mixed signal that primary coil is passed over by magnetic coupling
Number, obtain its carrying control signal, three lead-in wires are respectively: n4 coil have with inscription end line end, n4 be connected with n5 line end,
N5 is without the line end with inscription end.
The shaping overcurrent protector is made of high-speed comparator, current threshold comparator, is had in a switch periods
The ability of interior shutdown IGBT pipe.
The beneficial effects of the present invention are: previous IGBT control circuit is distinguished, modulated signal and power power-supply must divide
Open transmission；By introducing Magnetic isolation transformer, for controlling the modulated signal of IGBT pipe and being modulated at the power electricity of high frequency carrier
Source is sent to the control circuit of IGBT pipe by Magnetic isolation transformer simultaneously；It greatly simplified circuit structure, reduce installation volume,
Reliability is improved again, is reduced costs, and has the advantages that working frequency is high, power density is big.
Detailed description of the invention
Fig. 1 is the circuit topology schematic diagram of the embodiment of the present invention.
Fig. 2 is the power multiplier schematic diagram of one of embodiment of the present invention.
Fig. 3 is the shaping overcurrent protector schematic diagram of one of embodiment of the present invention.
Fig. 4 is the amplifier schematic diagram of one of embodiment of the present invention.
Specific embodiment
The invention will be further described one of with reference to the accompanying drawings and examples:
Referring to Fig. 1, circuit of the present invention include: include: power multiplier (1), diamagnetic inclined circuit (2), Magnetic isolation transformer
(3), rectifier (4), filter (5), demodulator (6), shaping current foldback circuit (7), amplifier (8)；The Magnetic isolation becomes
Depressor (3) is made of primary coil n1 (31), secondary coil n2 (32), n3 (33), n4 (34), n5 (35), coil n2
(32), the end to end composition centre cap power coil group of n3 (33), coil n4 (34), n5 (35) take out at end to end composition center
Head signal coil group, realizes magnetic coupling by magnetic core between primary coil and secondary coil.
With reference to Fig. 2, the power multiplier of one of the embodiment of the present invention is at least by linear multiplier, integrated circuit multiplication
The basic multiplier (11) that one of devices such as device, logical device, frequency mixer are constituted, NPN transistor (12), PNP transistor
(13) it is connected into push-pull configuration, constitutes current driving circuit.
With reference to Fig. 3, the composition of the shaping overcurrent protector of one of the embodiment of the present invention are as follows: resistance R1 (71), resistance R2
(72) divider is constituted, reference voltage Ur1 will be obtained after reference voltage Uf1 partial pressure, reference voltage Ur1 is connected to comparator A1 (73)
Negative input end, the comparison voltage as (73) comparator A1.Resistance R4 (76), resistance R3 (77) constitute divider, will be with reference to electricity
Reference voltage Ur2 is obtained after pressure Uf2 partial pressure, reference voltage Ur2 is connected to the positive input terminal of (75) comparator A2, as comparator A2
Comparison voltage.Specific works description are as follows: the modulated signal after demodulation brought by demodulator (6) is protected as shaping overcurrent
The anode that one of the input signal of device Us is sent to (73) comparator A1 is protected, is compared shaping with the reference voltage Ur1 of negative terminal,
The modulated signal of comparator A1 (73) outputting high quality is simultaneously sent to and door F (74).Flow through the electric current Ib conduct of IGBT pipe emitter
One of the input signal of shaping overcurrent protector is admitted to the primary n1 coil of transformer T8 (79), is formed after transformer coupled
Electric current Ib2 in secondary coil n2.Ib2 forms voltage UIb on R5 (78).UIb is sent to the cathode of (75) comparator A2, with
The reference voltage Ur2 of anode is compared, and comparison result is sent to and door F (74).When IGBT pipe emitter current Ib is less than protection
When value, UIb is less than reference voltage Ur2, and comparator A2 (75) exports high level, the modulation of the high quality of comparator A1 (73) output
Signal can be by exporting with door F (74).When IGBT pipe emitter current Ib is greater than protection value, UIb is greater than reference voltage Ur2,
Comparator A2 (75) exports low level, and the modulated signal of the high quality of comparator A1 (73) output can not be by defeated with door F (74)
Out, door F (74) exports low level, turns off IGBT.
With reference to Fig. 4, the composition of the amplifier of one of the embodiment of the present invention are as follows: NPN transistor T1 (81), T2 (83) are constituted
NPN type Darlington multiple tube, PNP transistor T2 (81), T4 (84) constitute positive-negative-positive Darlington multiple tube.NPN type Darlington is compound
Pipe constitutes complementary push-pull structure with positive-negative-positive Darlington multiple tube, forms current driving circuit, output voltage Vout1.Capacitor C1
(85) divider is constituted with capacitor C2 (86), mid-point voltage Vout2 will be obtained after voltage+Vcc ,-Vcc partial pressure.In embodiment,
Vout1 is sent to the grid G of IGBT, and Vout2 is sent to the emitter E of IGBT.
The course of work of one of the embodiment of the present invention are as follows: modulated signal is control signal of the carrier to IGBT pipe, high frequency
Carrier signal is to carry the carrier signal of electric flux, and after they are handled by power multiplier, formation had both been carried to IGBT pipe
Signal is controlled, and carries the mixed signal of electric flux.After the mixed signal send diamagnetic inclined processing of circuit, formed without DC component
Output signal, input signal Uin of the output signal as primary coil n1.After Uin signal inputs primary coil n1, through magnetic
Isolating transformer coupling, is transferred to secondary, and the signal for being coupled to the power coil group of coil n2, n3 composition is sent to rectifier, passes through
Pulsating direct current signal is obtained after rectifier rectification；The pulsating direct current signal of rectifier output is sent to filter, via+filtering link
With-filtering link filtering after obtain+Vcc and two direct voltage outputs of-Vcc, electricity of the DC voltage as other circuits
Source.The signal for being coupled to the signal coil group of coil n4, n5 composition is sent to demodulator, demodulated to restore modulated signal.Solution
It adjusts the modulated signal of device output to be sent to shaping overcurrent protector and carries out shaping, obtain the modulated signal of high quality.Shaping overcurrent is protected
The high quality SPWM signal of shield device output is sent to amplifier and amplifies, and exports after obtaining enough power, driving IGBT pipe；
IGBT pipe collector signal is introduced to the input terminal of shaping overcurrent protector, the signal as characterization IGBT tube current size.
Technical solution of the present invention proposes a kind of Magnetic isolation transformer device structure, and the magnetic coupling channel which is constituted can be simultaneously
Driving signal and electric flux are transmitted to secondary channel by primary；It is proposed that the method for transmission, the party are isolated with energy for a kind of signal
Method is the modulated signal that will represent IGBT driving signal and the high frequency carrier mixed modulated for carrying electric flux, forms an existing control
Signal processed carries the carrier signal of energy again, constitutes mixed signal.The magnetic loop that mixed signal is provided via Magnetic isolation transformer
It is transmitted to secondary, and is decomposed into modulated signal and high frequency carrier again in secondary.
The beneficial effects of the present invention are: previous IGBT control circuit is distinguished, modulated signal and power power-supply must divide
Open transmission；By introducing Magnetic isolation transformer, for controlling the modulated signal of IGBT pipe and being modulated at the power electricity of high frequency carrier
Source is sent to the control circuit of IGBT pipe by Magnetic isolation transformer simultaneously；It greatly simplified circuit structure, reduce installation volume,
Reliability is improved again, is reduced costs, and has the advantages that working frequency is high, power density is big.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The change or replacement expected without creative work should all be covered subject to the scope of the present invention.
Claims (5)
1. a kind of self-powered inverter IGBT driving device based on Magnetic isolation, it is characterised in that: including power multiplier, diamagnetic
Inclined circuit, Magnetic isolation transformer, rectifier, filter, demodulator, shaping current foldback circuit, amplifier；The Magnetic isolation becomes
Depressor is made of primary coil n1, secondary coil n2, n3, n4, n5, the end to end composition centre cap electricity of coil n2, n3
Source coil group, the end to end composition centre cap signal coil group of coil n4, n5, passes through magnetic between primary coil and secondary coil
Core realizes magnetic coupling；The filter filters link by+filtering link with-and constitutes；Modulated signal is pwm signal, SPWM signal
One of with SVPWM signal, modulated signal and input signal of the high-frequency carrier signal as power multiplier are multiplied by power
Musical instruments used in a Buddhist or Taoist mass treated signal send diamagnetic inclined processing of circuit, forms the output signal without DC component, the output signal is as just
The input signal Uin of grade coil n1；It is transformer coupled through Magnetic isolation after Uin signal inputs primary coil n1, it is transferred to secondary,
The signal for being coupled to the power coil group of coil n2, n3 composition is sent to rectifier, obtains pulsating direct current letter after rectified device rectification
Number；The pulsating direct current signal of rectifier output is sent to filter, via obtained after+filtering link with-filtering link filtering+
Vcc and two direct voltage outputs of-Vcc；The signal for being coupled to the signal coil group of coil n4, n5 composition is sent to demodulator, passes through
Modulated signal is restored after demodulation；The modulated signal of demodulator output is sent to shaping overcurrent protector and carries out shaping, obtains high-quality
The modulated signal of amount；The high quality SPWM signal of shaping overcurrent protector output is sent to amplifier and amplifies, and obtains enough
It is exported after power, driving IGBT pipe；IGBT pipe collector signal is introduced to the input terminal of shaping overcurrent protector, as characterization
The signal of IGBT tube current size；By+filtering link output+Vcc voltage is sent to shaping overcurrent protector and amplifier respectively,
By-filtering link output-Vcc voltage is sent to shaping overcurrent protector and amplifier respectively, as shaping overcurrent protector and
The working power of amplifier；High frequency carrier, which carries, provides the electric flux of working power for secondary, and the electric flux is through power multiplication
Device is mixed with modulated signal, and form the existing modulated signal for representing IGBT switch control information has the high frequency for carrying electric flux to carry again
The mixed signal Uin of wave signal.
2. a kind of self-powered inverter IGBT driving device based on Magnetic isolation according to claim 1, it is characterised in that:
The power multiplier is made of basic multiplier with current driving circuit；Basic multiplier is by linear multiplier, integrated circuit
At least one of multiplier, logical device, frequency mixer device is constituted；Current driving circuit is made of push-pull topology circuit.
3. a kind of self-powered inverter IGBT driving device based on Magnetic isolation according to claim 1, it is characterised in that:
The diamagnetic partially electric routing resistance and capacitor composition, to eliminate the DC component of signal.
4. a kind of self-powered inverter IGBT driving device based on Magnetic isolation according to claim 1, it is characterised in that:
The Magnetic isolation transformer be completed at the same time electrical isolation, high frequency carrier electric flux take out, modulated signal take out three functions, it by
Primary coil, secondary coil and magnetic core form, and primary coil is single coil, and secondary coil is made of two coil groups；It is each
A coil group is according to the concatenated two coils composition of inscription end head and the tail, and symmetrical configuration is to prevent bias；One of coil group
For power coil group, the high-frequency carrier signal in mixed signal passed over by magnetic coupling for receiving primary coil is obtained
Obtain its electric flux carried；Another coil group is signal coil group, for obtaining the modulated signal in mixed signal.
5. a kind of self-powered inverter IGBT driving device based on Magnetic isolation according to claim 1, it is characterised in that:
The shaping overcurrent protector is made of high-speed comparator, current threshold comparator, is had and is turned off in a switch periods
The ability of IGBT pipe.
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| CN201710934745.9A CN107516994B (en) | 2017-10-10 | 2017-10-10 | A kind of self-powered inverter IGBT driving device based on Magnetic isolation |
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| CN201710934745.9A CN107516994B (en) | 2017-10-10 | 2017-10-10 | A kind of self-powered inverter IGBT driving device based on Magnetic isolation |
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| CN107516994B true CN107516994B (en) | 2019-10-25 |
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| CN109462322B (en) * | 2018-10-30 | 2020-03-31 | 上海沪工焊接集团股份有限公司 | Isolated drive and isolated power supply two-in-one circuit |
| CN109900961A (en) * | 2019-04-17 | 2019-06-18 | 国网福建省电力有限公司南平供电公司 | A kind of voltage transformer secondary takes the wireless phasor collector of energy |
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| CN101640526A (en) * | 2009-08-19 | 2010-02-03 | 广州金升阳科技有限公司 | IGBT driving circuit embedded with isolating source |
| CN202679251U (en) * | 2012-06-11 | 2013-01-16 | 广州金升阳科技有限公司 | Signal isolation transmitter |
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