CN109450231A - A kind of current driving device of high power device - Google Patents
A kind of current driving device of high power device Download PDFInfo
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- CN109450231A CN109450231A CN201811357542.9A CN201811357542A CN109450231A CN 109450231 A CN109450231 A CN 109450231A CN 201811357542 A CN201811357542 A CN 201811357542A CN 109450231 A CN109450231 A CN 109450231A
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- 239000003990 capacitor Substances 0.000 claims description 74
- 230000005611 electricity Effects 0.000 claims description 15
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 2
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- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
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Classifications
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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
Abstract
The embodiment of the invention provides a kind of current driving device of high power device, which includes: current setting circuit, PID adjusting circuit, amplifying circuit and driving circuit；Current setting circuit receives given voltage signal, adjusts to given voltage signal, and the voltage signal after adjusting is transmitted to PID and adjusts circuit；PID adjusts circuit and carries out PID adjusting to the voltage signal after adjusting, and the voltage signal after adjusting is transmitted to amplifying circuit；Amplifying circuit amplifies the voltage signal after adjusting, and amplified voltage signal is transmitted to driving circuit；Driving circuit receives amplified voltage signal, and output current signal is to high power device.By applying the present invention, reducing the service time of high power device, it is not easily susceptible to the interference of strong-electromagnetic field and generates false triggering, does not will lead to entire high-power electric and electronic transformer operation irregularity, improve the reliability and stability of driving circuit.
Description
Technical field
The present invention relates to power electronic devices actuation techniques fields, and in particular to a kind of electric current driving dress of high power device
It sets.
Background technique
As the technology of device for high-power power electronic graduallys mature, electric system uses high power device more and more
Realize the high-power electric and electronic transformer of DCDC, DCAC, the driving of device for high-power power electronic is the key that its application.
In traditional driving method, gate driving is driven using voltage, and the shortcomings that the method is to be easy by strong electromagnetic
Interference and the phenomenon that generate false triggering, may cause entire high-power electric and electronic transformer operation irregularity.
Summary of the invention
In view of this, the embodiment of the present invention proposes a kind of current driving device of high power device, it is existing to solve
The phenomenon that driving method is easy the interference by strong-electromagnetic field and generates false triggering may cause entire high-power electric and electronic and become
The problem of depressor operation irregularity.
To achieve the above object, the present invention adopts the following technical scheme:
According in a first aspect, the embodiment of the invention provides a kind of current driving device of high power device, the electric current
Driving device includes: current setting circuit, PID adjusting circuit, amplifying circuit and driving circuit；The current setting circuit receives
Given voltage signal adjusts the given voltage signal, and the voltage signal after adjusting is transmitted to the PID and is adjusted
Circuit；The PID adjusts circuit and carries out PID adjusting to the voltage signal after the adjusting, and the voltage signal after adjusting is passed
Transport to the amplifying circuit；The amplifying circuit amplifies the voltage signal after the adjusting, and by amplified voltage
Signal is transmitted to the driving circuit；The driving circuit receives the amplified voltage signal, and output current signal is extremely
The high power device.
According in a first aspect, in first aspect first embodiment, the current driving device further include: the first ratio
Adjust circuit；The first proportion adjustment circuit acquires the first voltage signal and second voltage letter of the driving circuit output end
Number, proportion adjustment carried out to the difference of the first voltage signal and the second voltage signal, and by the electricity after proportion adjustment
Pressure signal feeds back to the input terminal of the driving circuit.
First embodiment with reference to first aspect, in first aspect second embodiment, the current driving device is also
It include: error amplifying circuit；The error amplifying circuit acquires the first voltage signal and second of the driving circuit output end
Voltage signal carries out differential amplification to the first voltage signal and second amplified signal, and by the electricity after differential amplification
Pressure signal feeds back to the input terminal of the current setting circuit.
Second embodiment with reference to first aspect, in first aspect third embodiment, the current driving device is also
It include: protection circuit；The protection circuit acquires the second voltage signal and tertiary voltage signal of the driving circuit output end,
And export return signal.
Third embodiment with reference to first aspect, in the 4th embodiment of first aspect, the current setting circuit packet
It includes: the first amplifier, first resistor, second resistance, 3rd resistor, the 4th resistance and the 8th capacitor；The given voltage signal is logical
The noninverting input that the second resistance inputs first amplifier is crossed, one end of the 3rd resistor connects first amplifier
Noninverting input, connect to the other end；One end of the first resistor connects the output end of the error amplifying circuit, the other end
Connect the reverse input end of first amplifier；One end of 4th resistance connects the reverse input end of first amplifier,
The other end connects the output end of first amplifier；The cathode of one end connection power supply of 8th capacitor, other end ground connection.
4th embodiment with reference to first aspect, in the 5th embodiment of first aspect, the amplifying circuit includes:
16 resistance, the 17th resistance, the 18th resistance, the 9th capacitor, the tenth capacitor and the 5th amplifier；The one of 16th resistance
End connects the noninverting input of the 5th amplifier, other end ground connection；One end connection of 17th resistance the 5th fortune
The reverse input end put, the other end connect the output end of the 5th amplifier, and the reverse input end of the 5th amplifier connects institute
State the output end that PID adjusts circuit；One end of 9th capacitor connects the cathode of the power supply, other end ground connection；Described
One end of ten capacitors connects the anode of the power supply, other end ground connection；One end connection of 18th resistance the 5th fortune
The output end put, the other end connect the input terminal of the driving circuit.
5th embodiment with reference to first aspect, in first aspect sixth embodiment, the driving circuit includes:
Six amplifiers, the 8th amplifier, the 14th capacitor, the 15th capacitor, the 20th resistance, the 21st resistance, the 22nd resistance,
One triode, the second triode, third transistor, the 4th triode, the 30th resistance and the 31st resistance；6th fortune
The noninverting input put connects the output end of the 5th amplifier by the 18th resistance, the 6th amplifier it is reversed defeated
Enter the output end that end connects the 6th amplifier by the 14th resistance；One end connection described the of 15th capacitor
The output end of six amplifiers, other end ground connection；One end of 21st resistance connects the output end of the 6th amplifier, another
End connects the reverse input end of the 8th amplifier；One end of 20th resistance connects the reversed input of the 8th amplifier
End, the other end connect the output end of the 8th amplifier；The noninverting input of 8th amplifier connects the cathode of the power supply,
8th amplifier connects the base stage of the third transistor and the base stage of the 4th triode；The collection of the third transistor
Electrode connects the anode of the power supply, and emitter connects the grid of the high power device；The collector of 4th triode
The cathode of the power supply is connected, emitter connects the grid of the high power device；One end of 22nd resistance connects
The output end of 6th amplifier, the other end connect the base stage of first triode and the base stage of second triode；Institute
The collector for stating the first triode connects the anode of the power supply, and emitter connects the emitter of second triode；It is described
The collector of second triode connects the cathode of the power supply, and emitter passes through the 30th resistance and the 31st electricity
The parallel circuit of resistance connects the source electrode of the high power device.
Sixth embodiment with reference to first aspect, in the 7th embodiment of first aspect, the first proportion adjustment electricity
Road includes: the 7th amplifier, the 51st capacitor, the 52nd capacitor, the 19th resistance, the 23rd resistance, the 24th electricity
Resistance and the 25th resistance；The noninverting input of 7th amplifier passes through the 25th resistance eutral grounding, the 7th fortune
The reverse input end put connects the source electrode of the high power device, the output of the 7th amplifier by the 23rd resistance
End connects the reverse input end of the 6th amplifier；The anode of one end connection of 51st capacitor power supply, separately
One end ground connection；One end of 19th resistance connects the reverse input end of the 7th amplifier, other end connection the described 7th
The output end of amplifier；The cathode of one end connection of 52nd capacitor power supply, other end ground connection；Described 20th
One end of four resistance connects the noninverting input of the 7th amplifier, and the other end connects the emitter of second triode.
7th embodiment with reference to first aspect, in the 8th embodiment of first aspect, the error amplifying circuit packet
It includes: the 9th amplifier, the tenth amplifier, the 53rd capacitor, the 54th capacitor, the 55th capacitor, the 56th capacitor, second
16 resistance, the 27th resistance, the 28th resistance and the 29th resistance；One end of 53rd capacitor connects institute
The anode for the power supply stated, other end ground connection；The cathode of one end connection of 54th capacitor power supply, another termination
Ground；The anode of one end connection of 55th capacitor power supply, other end ground connection；The one of 56th capacitor
The cathode of the end connection power supply, other end ground connection；The noninverting input of 9th amplifier connects second triode
Emitter, the reverse input end of the 9th amplifier connects the output of the 9th amplifier by the 28th resistance
End, the output end of the 9th amplifier connect the reverse input end of first amplifier by the first resistor；Described tenth
The noninverting input of amplifier connects the source electrode of the high power device, and the reverse input end of the tenth amplifier passes through described second
16 resistance connect the output end of the tenth amplifier；One end of 27th resistance connects the output of the tenth amplifier
End, the other end connect the reverse input end of the 9th amplifier；One end of 29th resistance connects the 9th amplifier
Reverse input end, the other end connects the reverse input end of the tenth amplifier.
8th embodiment with reference to first aspect, in the 9th embodiment of first aspect, the protection circuit includes:
11 amplifiers, the 57th capacitor, the 58th capacitor, the 32nd resistance, the 33rd resistance, the 34th resistance and
35 resistance；The noninverting input of 11st amplifier passes through the 34th resistance eutral grounding, the 11st amplifier
Reverse input end the source electrode of the high power device, the output of the 11st amplifier are connected by the 33rd resistance
End exports the return signal；One end of 57th capacitor connects the anode of the power supply, other end ground connection；Described
One end of 58 capacitors connects the cathode of the power supply, other end ground connection；Described in one end connection of 32nd resistance
The output end of 11st amplifier, the other end connect the reverse input end of the 11st amplifier；The one of 35th resistance
End connects the reverse input end of the 11st amplifier, and the other end connects the grid of the high power device.
Technical solution of the present invention at least has the advantages that compared with prior art
The embodiment of the invention provides a kind of current driving device of high power device, which passes through electric current
Initialization circuit receives given voltage signal, adjusts to given voltage signal, and the voltage signal after adjusting is transmitted to PID
Circuit is adjusted, circuit is adjusted by PID, PID adjusting is carried out to the voltage signal after adjusting, and the voltage signal after adjusting is passed
Amplifying circuit is transported to, the voltage signal after adjusting is amplified by amplifying circuit, and amplified voltage signal is transmitted
To driving circuit, amplified voltage signal is received by driving circuit, and output current signal is to high power device.The present invention
The current driving device for the high power device that embodiment provides reduces so that grid reaches threshold voltage with bigger speed
The service time of high power device drives high power device using the electric current of output, compared to traditional voltage drive method, no
Vulnerable to strong-electromagnetic field interference and generate false triggering, not will lead to entire high-power electric and electronic transformer operation irregularity, mention
The high reliability and stability of driving circuit.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of a specific example of the current driving device of high power device in the embodiment of the present invention；
Fig. 2 is the schematic diagram of another specific example of the current driving device of high power device in the embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " first ", " second ", " third " etc. are only used for description mesh
, it is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements, can be wireless connection, be also possible to wired connection.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
The embodiment of the invention provides a kind of current driving devices of high power device, as shown in Figure 1, electric current driving dress
Set includes: current setting circuit 1, PID adjusting circuit 2, amplifying circuit 3 and driving circuit 4；Current setting circuit 1 receives given
Voltage signal adjusts given voltage signal, and the voltage signal after adjusting is transmitted to PID and adjusts circuit 2；PID tune
Voltage signal after the adjusting of 2 pairs of economize on electricity road carries out PID adjusting, and the voltage signal after adjusting is transmitted to amplifying circuit 3；Amplification
Voltage signal after 3 pairs of circuit adjustings amplifies, and amplified voltage signal is transmitted to driving circuit 4；Driving circuit 4
Receive amplified voltage signal, and output current signal is to high power device.
The current driving device of high power device provided in an embodiment of the present invention receives given electricity by current setting circuit 1
Signal is pressed, given voltage signal is adjusted, and the voltage signal after adjusting is transmitted to PID and adjusts circuit 2, passes through PID
Voltage signal after adjusting 2 pairs of circuit adjustings carries out PID adjusting, and the voltage signal after adjusting is transmitted to amplifying circuit 3, leads to
Voltage signal after crossing 3 pairs of amplifying circuit adjustings amplifies, and amplified voltage signal is transmitted to driving circuit 4, leads to
Overdrive circuit 4 receives amplified voltage signal, and output current signal is to high power device.It is provided in an embodiment of the present invention
The current driving device of high power device drives high power device using the electric current of output, compared to traditional voltage driving side
Method reduces the service time of high power device, is not easily susceptible to strong electromagnetic so that grid reaches threshold voltage with bigger speed
Interference and generate false triggering, not will lead to entire high-power electric and electronic transformer operation irregularity, improve driving circuit
Reliability and stability.
In a preferred embodiment, as shown in Figure 1, the current driving device of high power device provided in an embodiment of the present invention
Further include: the first proportion adjustment circuit 5；First proportion adjustment circuit 5 acquire driving circuit output end first voltage signal and
Second voltage signal carries out proportion adjustment to the difference of first voltage signal and second voltage signal, and will be after proportion adjustment
Voltage signal feeds back to the input terminal of driving circuit 4.
In a preferred embodiment, as shown in Figure 1, the current driving device of high power device provided in an embodiment of the present invention
Further include: error amplifying circuit 6；The first voltage signal and second voltage of the acquisition driving circuit output end of error amplifying circuit 6
Signal carries out differential amplification to first voltage signal and the second amplified signal, and the voltage signal after differential amplification is fed back to
The input terminal of current setting circuit 1.
In a preferred embodiment, as shown in Figure 1, the current driving device of high power device provided in an embodiment of the present invention
Further include: protection circuit 7；Circuit 7 is protected to acquire the second voltage signal and tertiary voltage signal of driving circuit output end, and defeated
Signal is returned out.
As shown in Fig. 2, above-mentioned current setting circuit 1 includes: the first amplifier U1, first resistor R1, second resistance R2, third
Resistance R3, the 4th resistance R4 and the 8th capacitor C8；Given voltage signal inputs the in the same direction of the first amplifier U1 by second resistance R2
Input terminal, one end of 3rd resistor R3 connect the noninverting input of the first amplifier U1, meet GND to the other end；First resistor R1's
One end connects the output end of error amplifying circuit, and the other end connects the reverse input end of the first amplifier U1；The one of 4th resistance R4
The reverse input end of the first amplifier U1 of end connection, the other end connect the output end of the first amplifier U1；One end of 8th capacitor C8 connects
Cathode-the VHI of power supply is met, the other end is grounded GND.
As shown in Fig. 2, above-mentioned PID is adjusted, circuit 2 includes: the second proportion adjustment circuit, differential adjusts circuit and integral is adjusted
Economize on electricity road.The embodiment of the present invention adjusts circuit 2 using PID, and the driving current finally exported is made to have good stablizing effect.
As shown in Fig. 2, above-mentioned amplifying circuit 3 includes: the 16th resistance R16, the 17th resistance R17, the 18th resistance
R18, the 9th capacitor C9, the tenth capacitor C10 and the 5th amplifier U5；One end of 16th resistance R16 connects the same of the 5th amplifier U5
To input terminal, the other end is grounded GND；One end of 17th resistance R17 connects the reverse input end of the 5th amplifier U5, and the other end connects
The output end of the 5th amplifier U5 is connect, the reverse input end connection PID of the 5th amplifier U5 adjusts the output end of circuit；9th capacitor C9
One end connection power supply cathode-VHI, the other end be grounded GND；Anode+the VHI of one end connection power supply of tenth capacitor C10, separately
One end is grounded GND；One end of 18th resistance R18 connects the output end of the 5th amplifier U5, and the other end connects the defeated of driving circuit
Enter end.
As shown in Fig. 2, above-mentioned driving circuit 4 includes: the 6th amplifier U6, the 8th amplifier U8, the 14th capacitor C14, the tenth
Five capacitor C15, the 20th resistance R20, the 21st resistance R21, the 22nd resistance R22, the first triode Q1, the two or three pole
Pipe Q2, third transistor Q3, the 4th triode Q4, the 30th resistance R30 and the 31st resistance R31；6th amplifier U6's is same
To input terminal by the output end of the 5th amplifier U5 of the 18th resistance R18 connection, the reverse input end of the 6th amplifier U6 passes through the
The output end of the 6th amplifier U6 of 14 resistance R14 connection；One end of 15th capacitor C15 connects the output end of the 6th amplifier U6,
The other end is grounded GND；One end of 21st resistance R21 connects the output end of the 6th amplifier U6, and the other end connects the 8th amplifier
The reverse input end of U8；One end of 20th resistance R20 connects the reverse input end of the 8th amplifier U8, the 8th fortune of other end connection
Put the output end of U8；Cathode-the VHI of the noninverting input connection power supply of 8th amplifier U8, the three or three pole of the 8th amplifier U8 connection
The base stage of the base stage of pipe Q3 and the 4th triode Q4；Anode+the VHI of the collector connection power supply of third transistor Q3, emitter
Connect the grid G of high power device；Cathode-the VHI of the collector connection power supply of 4th triode Q4, emitter connection are high-power
The grid G of device；One end of 22nd resistance R22 connects the output end of the 6th amplifier U6, and the other end connects the first triode
The base stage of the base stage of Q1 and the second triode Q2；Anode+the VHI of the collector connection power supply of first triode Q1, emitter connect
Connect the emitter of the second triode Q2；Cathode-the VHI of the collector connection power supply of second triode Q2, emitter pass through third
The source S of the parallel circuit connection high power device of ten resistance R30 and the 31st resistance R31.
As shown in Fig. 2, above-mentioned first proportion adjustment circuit 5 includes: the 7th amplifier U7, the 51st capacitor C51, the 50th
Two capacitor C52, the 19th resistance R19, the 23rd resistance R23, the 24th resistance R24 and the 25th resistance R25；7th
The noninverting input of amplifier U7 is grounded GND by the 25th resistance R25, and the reverse input end of the 7th amplifier U7 passes through the 20th
The source S of three resistance R23 connection high power devices, the output end of the 7th amplifier U7 connect the reverse input end of the 6th amplifier U6；
Anode+the VHI of the power supply of one end connection of 51st capacitor C51, the other end are grounded GND；One end of 19th resistance R19 connects
The reverse input end of the 7th amplifier U7 is connect, the other end connects the output end of the 7th amplifier U7；One end of 52nd capacitor C52 connects
Cathode-the VHI of the power supply connect, the other end are grounded GND；One end of 24th resistance connects the input in the same direction of the 7th amplifier U7
End, the other end connect the emitter of the second triode Q2.
As shown in Fig. 2, above-mentioned error amplifying circuit 6 includes: the 9th amplifier U9, the tenth amplifier U10, the 53rd capacitor
C53, the 54th capacitor C54, the 55th capacitor C55, the 56th capacitor C56, the 26th resistance R26, the 27th
Resistance R27, the 28th resistance R28 and the 29th resistance R29；The power supply of one end connection of 53rd capacitor C53 is just
Pole+VHI, the other end are grounded GND；Cathode-the VHI of the power supply of one end connection of 54th capacitor C54, the other end are grounded GND；
Anode+the VHI of the power supply of one end connection of 55th capacitor C55, the other end are grounded GND；One end of 56th capacitor C56
Cathode-the VHI of the power supply of connection, the other end are grounded GND；The noninverting input of 9th amplifier U9 connects the hair of the second triode Q2
Emitter-base bandgap grading, the reverse input end of the 9th amplifier U9 pass through the output end of the 9th amplifier U9 of the 28th resistance R28 connection, the 9th amplifier
The output end of U9 passes through the reverse input end of the first amplifier of first resistor R1 connection U1；The noninverting input of tenth amplifier U10 connects
The source S of high power device is connect, the reverse input end of the tenth amplifier passes through the tenth amplifier U10's of the 26th resistance R26 connection
Output end；One end of 27th resistance R27 connects the output end of the tenth amplifier U10, and the other end connects the anti-of the 9th amplifier U9
To input terminal；One end of 29th resistance R29 connects the reverse input end of the 9th amplifier U9, and the other end connects the tenth amplifier
The reverse input end of U10.
As shown in Fig. 2, above-mentioned protection circuit 7 includes: the 11st amplifier U11, the 57th capacitor C57, the 58th electricity
Hold C58, the 32nd resistance R32, the 33rd resistance R33, the 34th resistance R34 and the 35th resistance R35；11st
The noninverting input of amplifier U11 is grounded GND by the 34th resistance R34, and the reverse input end of the 11st amplifier U11 passes through the
The source S of 33 resistance R33 connection high power devices, the output end output return signal of the 11st amplifier U11；57th
Anode+the VHI of one end connection power supply of capacitor C57, the other end are grounded GND；One end connection power supply of 58th capacitor C58
Cathode-VHI, the other end are grounded GND；One end of 32nd resistance R32 connects the output end of the 11st amplifier U11, the other end
Connect the reverse input end of the 11st amplifier U11；One end of 35th resistance R35 connects the reversed defeated of the 11st amplifier U11
Enter end, the other end connects the grid G of high power device.
It should be noted that first voltage signal described in the embodiment of the present invention be the first triode Q1 emitter and
Voltage signal between the collector of second triode Q2, second voltage signal described in the embodiment of the present invention are the 30th electricity
Hinder the voltage signal of the parallel circuit output end of R30 and the 31st resistance R31, tertiary voltage described in the embodiment of the present invention
Signal is the voltage signal between the emitter of third transistor Q3 and the emitter of the 4th triode Q4.
Communication interface modules in the embodiment of the present invention, including exporting voltage signal given herein above to current driving device
The interface Hb for returning signal is exported in interface S-IN and current driving device, communication interface is responsible for communicating with supervisory controller,
The order of host computer is transformed into the triggering mode of high power device.
The embodiment of the present invention uses the transformer of high-isolating, and high isolated from power is that the electric current of high power device drives
Device provides operating voltage VHI, and isolation voltage can achieve 20000VDC, meet the requirement of the operating voltage of high power device,
It ensure that the isolated from power of the voltage between the voltage of current driving device and supervisory controller.
It should be noted that the amplifier used in the embodiment of the present invention is LM7171.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of current driving device of high power device characterized by comprising current setting circuit (1), PID adjust electricity
Road (2), amplifying circuit (3) and driving circuit (4)；
The current setting circuit (1) receives given voltage signal, adjusts to the given voltage signal, and will be after adjusting
Voltage signal be transmitted to the PID and adjust circuit (2)；
The PID adjusts circuit (2) and carries out PID adjusting to the voltage signal after the adjusting, and by the voltage signal after adjusting
It is transmitted to the amplifying circuit (3)；
The amplifying circuit (3) amplifies the voltage signal after the adjusting, and amplified voltage signal is transmitted to
The driving circuit (4)；
The driving circuit (4) receives the amplified voltage signal, and output current signal is to the high power device.
2. current driving device according to claim 1, which is characterized in that further include: the first proportion adjustment circuit (5)；
The first proportion adjustment circuit (5) acquires the first voltage signal and second voltage letter of the driving circuit output end
Number, proportion adjustment carried out to the difference of the first voltage signal and the second voltage signal, and by the electricity after proportion adjustment
Pressure signal feeds back to the input terminal of the driving circuit (4).
3. current driving device according to claim 2, which is characterized in that further include: error amplifying circuit (6)；
The error amplifying circuit (6) acquires the first voltage signal and second voltage signal of the driving circuit output end, right
The first voltage signal and second amplified signal carry out differential amplification, and the voltage signal after differential amplification is fed back to
The input terminal of the current setting circuit (1).
4. current driving device according to claim 3, which is characterized in that further include: protection circuit (7)；
Protection circuit (7) acquires the second voltage signal and tertiary voltage signal of the driving circuit output end, and exports
Return signal.
5. current driving device according to claim 4, which is characterized in that the current setting circuit (1) includes: first
Amplifier (U1), first resistor (R1), second resistance (R2), 3rd resistor (R3), the 4th resistance (R4) and the 8th capacitor (C8)；
The given voltage signal inputs the noninverting input of first amplifier (U1) by the second resistance (R2), described
One end of 3rd resistor (R3) connects the noninverting input of first amplifier (U1), meets to the other end (GND)；
One end of the first resistor (R1) connects the output end of the error amplifying circuit, and the other end connects first amplifier
(U1) reverse input end；
One end of 4th resistance (R4) connects the reverse input end of first amplifier (U1), other end connection described first
The output end of amplifier (U1)；
The cathode (- VHI) of one end connection power supply of 8th capacitor (C8), the other end are grounded (GND).
6. current driving device according to claim 5, which is characterized in that the amplifying circuit (3) includes: the 16th electricity
Hinder (R16), the 17th resistance (R17), the 18th resistance (R18), the 9th capacitor (C9), the tenth capacitor (C10) and the 5th amplifier
(U5)；
One end of 16th resistance (R16) connects the noninverting input of the 5th amplifier (U5), other end ground connection
(GND)；
One end of 17th resistance (R17) connects the reverse input end of the 5th amplifier (U5), described in other end connection
The output end of 5th amplifier (U5), the reverse input end of the 5th amplifier (U5) connect the output end that the PID adjusts circuit；
One end of 9th capacitor (C9) connects the cathode (- VHI) of the power supply, and the other end is grounded (GND)；
One end of tenth capacitor (C10) connects the anode (+VHI) of the power supply, and the other end is grounded (GND)；
One end of 18th resistance (R18) connects the output end of the 5th amplifier (U5), and the other end connects the driving
The input terminal of circuit.
7. current driving device according to claim 6, which is characterized in that the driving circuit (4) includes: the 6th amplifier
(U6), the 8th amplifier (U8), the 14th capacitor (C14), the 15th capacitor (C15), the 20th resistance (R20), the 21st electricity
Hinder (R21), the 22nd resistance (R22), the first triode (Q1), the second triode (Q2), third transistor (Q3), the four or three
Pole pipe (Q4), the 30th resistance (R30) and the 31st resistance (R31)；
The noninverting input of 6th amplifier (U6) connects the 5th amplifier (U5) by the 18th resistance (R18)
The reverse input end of output end, the 6th amplifier (U6) connects the 6th amplifier by the 14th resistance (R14)
(U6) output end；
One end of 15th capacitor (C15) connects the output end of the 6th amplifier (U6), and the other end is grounded (GND)；
One end of 21st resistance (R21) connects the output end of the 6th amplifier (U6), other end connection described the
The reverse input end of eight amplifiers (U8)；
One end of 20th resistance (R20) connects the reverse input end of the 8th amplifier (U8), described in other end connection
The output end of 8th amplifier (U8)；
The noninverting input of 8th amplifier (U8) connects the cathode (- VHI) of the power supply, the 8th amplifier (U8) connection
The base stage of the third transistor (Q3) and the base stage of the 4th triode (Q4)；
The collector of the third transistor (Q3) connects the anode (+VHI) of the power supply, and emitter connects the high-power device
The grid (G) of part；
The collector of 4th triode (Q4) connects the cathode (- VHI) of the power supply, and emitter connects the high-power device
The grid (G) of part；
One end of 22nd resistance (R22) connects the output end of the 6th amplifier (U6), other end connection described the
The base stage of the base stage of one triode (Q1) and second triode (Q2)；
The collector of first triode (Q1) connects the anode (+VHI) of the power supply, and emitter connects the two or three pole
Manage the emitter of (Q2)；
The collector of second triode (Q2) connects the cathode (- VHI) of the power supply, and emitter passes through the 30th electricity
Resistance (R30) connects the source electrode (S) of the high power device with the parallel circuit of the 31st resistance (R31).
8. current driving device according to claim 7, which is characterized in that the first proportion adjustment circuit (5) includes:
7th amplifier (U7), the 51st capacitor (C51), the 52nd capacitor (C52), the 19th resistance (R19), the 23rd resistance
(R23), the 24th resistance (R24) and the 25th resistance (R25)；
The noninverting input of 7th amplifier (U7) passes through the 25th resistance (R25) ground connection (GND), the 7th fortune
Put the source electrode (S) that the reverse input end of (U7) connects the high power device by the 23rd resistance (R23), described the
The output end of seven amplifiers (U7) connects the reverse input end of the 6th amplifier (U6)；
The anode (+VHI) of one end connection of 51st capacitor (C51) power supply, the other end are grounded (GND)；
One end of 19th resistance (R19) connects the reverse input end of the 7th amplifier (U7), described in other end connection
The output end of 7th amplifier (U7)；
The cathode (- VHI) of one end connection of 52nd capacitor (C52) power supply, the other end are grounded (GND)；
One end of 24th resistance connects the noninverting input of the 7th amplifier (U7), other end connection described second
The emitter of triode (Q2).
9. current driving device according to claim 8, which is characterized in that the error amplifying circuit (6) includes: the 9th
Amplifier (U9), the tenth amplifier (U10), the 53rd capacitor (C53), the 54th capacitor (C54), the 55th capacitor (C55),
56th capacitor (C56), the 26th resistance (R26), the 27th resistance (R27), the 28th resistance (R28) and second
19 resistance (R29)；
The anode (+VHI) of one end connection of 53rd capacitor (C53) power supply, the other end are grounded (GND)；
The cathode (- VHI) of one end connection of 54th capacitor (C54) power supply, the other end are grounded (GND)；
The anode (+VHI) of one end connection of 55th capacitor (C55) power supply, the other end are grounded (GND)；
The cathode (- VHI) of one end connection of 56th capacitor (C56) power supply, the other end are grounded (GND)；
The noninverting input of 9th amplifier (U9) connects the emitter of second triode (Q2), the 9th amplifier
(U9) reverse input end connects the output end of the 9th amplifier (U9) by the 28th resistance (R28), and described the
The output end of nine amplifiers (U9) connects the reverse input end of first amplifier (U1) by the first resistor (R1)；
The noninverting input of tenth amplifier (U10) connects the source electrode (S) of the high power device, the tenth amplifier it is anti-
The output end of the tenth amplifier (U10) is connected by the 26th resistance (R26) to input terminal；
One end of 27th resistance (R27) connects the output end of the tenth amplifier (U10), other end connection described the
The reverse input end of nine amplifiers (U9)；
One end of 29th resistance (R29) connects the reverse input end of the 9th amplifier (U9), and the other end connects institute
State the reverse input end of the tenth amplifier (U10).
10. current driving device according to claim 9, which is characterized in that the protection circuit (7) includes: the 11st
Amplifier (U11), the 57th capacitor (C57), the 58th capacitor (C58), the 32nd resistance (R32), the 33rd resistance
(R33), the 34th resistance (R34) and the 35th resistance (R35)；
The noninverting input of 11st amplifier (U11) is by the 34th resistance (R34) ground connection (GND), and described the
The reverse input end of 11 amplifiers (U11) connects the source electrode of the high power device by the 33rd resistance (R33)
(S), the output end of the 11st amplifier (U11) exports the return signal；
One end of 57th capacitor (C57) connects the anode (+VHI) of the power supply, and the other end is grounded (GND)；
One end of 58th capacitor (C58) connects the cathode (- VHI) of the power supply, and the other end is grounded (GND)；
One end of 32nd resistance (R32) connects the output end of the 11st amplifier (U11), described in other end connection
The reverse input end of 11st amplifier (U11)；
One end of 35th resistance (R35) connects the reverse input end of the 11st amplifier (U11), other end connection
The grid (G) of the high power device.
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| Publication number | Publication date |
|---|---|
| CN109450231B (en) | 2024-01-16 |
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