CN108599601A - Synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit and its method - Google Patents
Synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit and its method Download PDFInfo
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- CN108599601A CN108599601A CN201810712041.1A CN201810712041A CN108599601A CN 108599601 A CN108599601 A CN 108599601A CN 201810712041 A CN201810712041 A CN 201810712041A CN 108599601 A CN108599601 A CN 108599601A
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- 239000004065 semiconductor Substances 0.000 claims abstract description 75
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 230000009466 transformation Effects 0.000 claims abstract description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 64
- 230000005611 electricity Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- 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
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
- H02M7/2195—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration the switches being synchronously commutated at the same frequency of the AC input voltage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
A kind of synchrotrans realize that isolated passive self-powered optocoupler three-phase synchronous rectification circuit and its method belong to rectification circuit field；Including three-phase synchronous rectification circuit, optical coupling isolation circuit, synchrotrans, AC power and load；The three-phase synchronous rectification circuit includes metal-oxide-semiconductor Q1, Q2, Q3, Q4, Q5 and Q6；The synchrotrans include transformer T and three-phase synchronous transformer M；The optical coupling isolation circuit includes optocoupler D1, D2, D3, D4, D5 and D6 of same model；The ac power output is separately connected synchrotrans, three-phase synchronous rectification circuit and optical coupling isolation circuit, the synchronous transformation connects optical coupling isolation circuit, the optical coupling isolation circuit connects three-phase synchronous rectification circuit, the three-phase synchronous rectification circuit connection load；The present invention keeps trigger signal accurately reliable, improves rectification circuit stability, avoids dedicated single chip microcomputer driving circuit, simplifies control loop, reduces cost.
Description
Technical field
The invention belongs to rectification circuit fields more particularly to a kind of synchrotrans to realize isolated passive self-powered optocoupler three
Be synchronised rectification circuit and its method.
Background technology
Currently, with the energy-saving and emission-reduction policy of country more and more deep, scientific and technical continuous improvement and new material
It is developed, people increasingly pay attention to the raising of efficiency, and as the equipment of big power consumption, motor is also got over using the ratio of frequency converter timing
Come higher.Frequency converter is the controlling electric energy that power frequency supply is transformed to another frequency using the on-off action of power semiconductor device
The electric energy of AC power is converted to direct current by device, frequency converter first, then the alternating current that direct current Electrical change is changeable frequency
It is loaded to drive, the rectifier diode of rectification circuit is replaced using power MOSFET, gives full play to the low spy of its on state resistance
Point can greatly reduce rectifier loss, to improve power-efficient.MOSFET tube devices carry out rectification for rectifier diode
Can success or failure key is synchronous with three-phase input voltage to the trigger signal of MOSFET tube devices, and when synchronous rectification is most important
Be for synchronous rectification control signal accurate reliable control.
According to the operation principle of rectified three-phase circuit it is found that the angle of flow of each MOSFET pipes is answered in a complete cycle
Less than or equal to 120 °, according to three-phase alternating current electrical characteristics, i.e. the rule of natural commutation point, AC signal is once changed every 60 °
Phase, and no matter when need to ensure upper bridge arm and lower bridge arm can only there are one pipes to be connected, if occurring two in the same set
A or more than two pipes simultaneously turn on, it will lead to the catastrophe failures such as the phase fault of net side, make the MOSFET of commutating circuit
Puncture and can not work, the reliable and stable important prerequisite item that is to ensure that commutating circuit and can work normally of synchronous triggering signal
Part.
Invention content
The present invention provides a kind of synchrotrans and realizes isolation in view of the above-mentioned problems, overcome the deficiencies in the prior art
Passive its method of self-powered optocoupler three-phase synchronous rectification circuit of formula.
Technical scheme of the present invention：
A kind of isolated passive self-powered optocoupler three-phase synchronous rectification circuit of synchrotrans realization, including three-phase synchronous rectification
Circuit, optical coupling isolation circuit, synchrotrans, AC power and load；The three-phase synchronous rectification circuit include metal-oxide-semiconductor Q1,
Q2, Q3, Q4, Q5 and Q6；The synchrotrans include transformer T and three-phase synchronous transformer M；The optical coupling isolation circuit packet
Include optocoupler D1, D2, D3, D4, D5 and D6 of same model；The ac power output is separately connected synchrotrans, three-phase
Circuit of synchronous rectification and optical coupling isolation circuit, the synchronous transformation connect optical coupling isolation circuit, the optical coupling isolation circuit connection
Three-phase synchronous rectification circuit, the three-phase synchronous rectification circuit connection load.
Further, further include the first voltage stabilizing element, the second voltage stabilizing element, third voltage stabilizing element, the 4th voltage stabilizing element,
Five voltage stabilizing elements and the 6th voltage stabilizing element；First voltage stabilizing element includes resistance R31 and zener diode DZ1, and described second
Voltage stabilizing element includes resistance R32 and zener diode DZ2, and the third voltage stabilizing element includes resistance R33 and zener diode
DZ3, the 4th voltage stabilizing element include resistance R34 and zener diode DZ4, and the 5th voltage stabilizing element includes resistance R35 and voltage stabilizing
Diode DZ5, the 6th voltage stabilizing element includes resistance R36 and zener diode DZ6；One end of the resistance R31 and voltage stabilizing
The emitter of the cathode connection optocoupler D1 output ends of diode DZ1, and connect with the grid of Q1, the other end of resistance R31 and surely
Press the input terminal a of the anode connection commutating circuit of diode DZ1；The cathode of one end and zener diode DZ2 of the resistance R32
The emitter of optocoupler D2 output ends is connected, and is connect with the grid of Q2, the sun of the other end and zener diode DZ2 of resistance R32
Pole connects the negative output terminal N of rectification output loop；It is defeated that one end of resistance R33 with the cathode of zener diode DZ3 connects optocoupler D3
The emitter of outlet, and connect with the grid of Q3, the other end of resistance R33 connects rectification with the anode of zener diode DZ3 and returns
The input terminal b on road；One end of resistance R34 connects the emitter of optocoupler D4 output ends, and and Q4 with the cathode of zener diode DZ4
Grid connection, the other end of resistance R34 connects the input terminal c of commutating circuit with the anode of zener diode DZ4；Resistance R35
One end the emitter of optocoupler D5 output ends is connected with the cathode of zener diode DZ5, and connect with the grid of Q5, resistance R35
The other end negative output terminal N of rectification output loop is connected with the anode of zener diode DZ5；One end of resistance R36 and voltage stabilizing
The emitter of the cathode connection optocoupler D6 output ends of diode DZ6, and connect with the grid of Q6, the other end of resistance R36 and surely
Press the negative output terminal N of the anode connection rectification output loop of diode DZ6.
Further, the AC power be 220V, the AC power after transformer T, respectively with optocoupler D4,
The diode cathode of D6, D2 are connected with the diode cathode of optocoupler D1, D3, D5, and the net of the rectified three-phase circuit is surveyed and three-phase
Synchrotrans M is connected, the current collection of the output end of three-phase synchronous transformer M and the triode of optocoupler D4, D6, D2, D1, D3, D5
Pole is connected by resistance R24, resistance R26, resistance R22, resistance R21, resistance R23 with resistance R25 respectively.
Further, the three-phase synchronous rectification circuit is connected using three-phase bridge rectifier circuit mode, three phase rectifier electricity
The low-voltage coil of the input terminal connection transformer T on road, the output end of the output end of transformer T as three-phase synchronous transformer M.
Further, the cathode connection metal-oxide-semiconductor Q1 of the anode of the optocoupler D1 input terminal diodes, D4 input terminal diodes
Source electrode and metal-oxide-semiconductor Q4 drain electrode, the anodes of optocoupler D3 input terminal diodes, D6 input terminal diodes cathode connect metal-oxide-semiconductor
The drain electrode of the source electrode and metal-oxide-semiconductor Q6 of Q3, the anode of optocoupler D5 input terminal diodes, the cathode of D2 input terminal diodes connect MOS
The cathode of the drain electrode of the source electrode and metal-oxide-semiconductor Q2 of pipe Q5, optocoupler D1, D3, D5 input terminal diode passes through resistance R40 connection optocouplers
The anode of D2, D4, D6 input terminal diode；The grid of the emitter connection metal-oxide-semiconductor Q1 of optocoupler D1 output ends, optocoupler D2 output ends
Emitter connection metal-oxide-semiconductor Q2 grid, the grid of the emitter connection metal-oxide-semiconductor Q3 of optocoupler D3 output ends, optocoupler D4 output ends
Emitter connection metal-oxide-semiconductor Q4 grid, the grid of the emitter connection metal-oxide-semiconductor Q5 of optocoupler D5 output ends, optocoupler D6 output ends
Emitter connection metal-oxide-semiconductor Q61 grid；The grid of metal-oxide-semiconductor Q2, Q4, Q6 pass through the second voltage stabilizing element, the 4th voltage stabilizing member respectively
Part, the 6th voltage stabilizing element are connected with the source level of metal-oxide-semiconductor Q2, Q4, Q6, and the source level of metal-oxide-semiconductor Q2, Q4, Q6 link together；Metal-oxide-semiconductor
The grid of Q1, Q3, Q5 are respectively by the first voltage stabilizing element, third voltage stabilizing element, the 5th voltage stabilizing element and metal-oxide-semiconductor Q1, Q3, Q5's
Source level is connected.
It is a kind of to realize the same of isolated passive self-powered optocoupler three-phase synchronous rectification circuit realization based on the synchrotrans
It walks transformer and realizes isolated passive self-powered optocoupler three-phase synchronous rectification method, include the following steps：
Step a, when transformer T is connected, three-phase synchronous rectification circuit is in running order, metal-oxide-semiconductor Q1, Q3, Q5 composition
Upper bridge arm, metal-oxide-semiconductor Q4, Q6, Q2 form lower bridge arm, and the low-voltage coil end of transformer T generates three-phase alternating current and is sent into three-phase synchronous
Rectification circuit；
Step b, according to the characteristic of three-phase alternating current, synchronization can make and only make two optocoupler conductings, three-phase alternating current
A certain moment a phase voltages are maximum, b phase voltage minimums when, ensure V1's and V6 using the secondary side winding method of synchrotrans
Output induced potential makes the transistor collector reliable power supply of D1 and D6 work, while electric current flows into optocoupler D1 input terminals from a points
The anode of diode flows out, at this time the diode current flow of optocoupler D1 from the cathode of optocoupler D1 input terminal diodes；
Step c, while the collector of the triode of optocoupler D1 makes optocoupler D1 conductings under the excitation of V1 power supplys, generates G1
Pole trigger signal, then metal-oxide-semiconductor Q1 triggering and conductings, electric current flows into the anode of optocoupler D6 input terminal diodes through resistance R40, from light
The cathode of coupling D6 input terminal diodes flows out, and the collector of the triode of optocoupler D6 makes optocoupler D6 under the excitation of V6 power supplys
Conducting generates G6 gate pole trigger signals, then metal-oxide-semiconductor Q6 triggering and conductings；
Step d, simultaneously turn on metal-oxide-semiconductor Q1, Q6, composition current loop is load supplying.
The present invention has the advantages that compared with the existing technology：
The present invention realizes that metal-oxide-semiconductor trigger signal is synchronous with AC-input voltage using optocoupler, utilizes single phase ac signal
The break-make of the natural commutation point control optocoupler internal body diodes of zero crossing or three-phase ac signal, to drive three poles inside optocoupler
The break-make of pipe is realized that circuit of synchronous rectification provides the synchronous rectification driving control signal with isolation features for MOSFET, is exchanged
Synchro source is provided for the outlet side of optocoupler also by synchrotrans while input power provides power supply to rectification major loop,
So that the break-make of triode inside optocoupler is influenced simultaneously by the break-make and AC power of diode, optocoupler light emitting diode with it is synchronous
The common participation of voltage device can provide duplicate protection to the generation of synchronizing signal.Keep trigger signal accurately reliable, improves rectification
Circuit stability avoids dedicated single chip microcomputer driving circuit, simplifies control loop, reduces cost, cancels the external electricity of optocoupler
Source powers, and realizes passive drive, solves the problems, such as that synchronous commutating control circuit is complicated and control signal reliability is low.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is transformer T circuit diagrams.
Fig. 3 is three-phase synchronous transformer M circuit diagrams.
Fig. 4 is the circuit diagram of the present invention.
Specific implementation mode
Below with reference to attached drawing, the present invention is described in detail.
Specific implementation mode one
The isolated passive self-powered optocoupler three-phase synchronous rectification circuit of a kind of synchrotrans realization, as shown in Figure 1, including three
Be synchronised rectification circuit, optical coupling isolation circuit, synchrotrans, AC power and load；The three-phase synchronous rectification circuit packet
Include metal-oxide-semiconductor Q1, Q2, Q3, Q4, Q5 and Q6；The synchrotrans include transformer T and three-phase synchronous transformer M；The optocoupler
Isolation circuit includes optocoupler D1, D2, D3, D4, D5 and D6 of same model；The ac power output is separately connected synchronous change
Depressor, three-phase synchronous rectification circuit and optical coupling isolation circuit, the synchronous transformation connect optical coupling isolation circuit, the light-coupled isolation
Circuit connects three-phase synchronous rectification circuit, the three-phase synchronous rectification circuit connection load.
The course of work：By the power MOSFET tube of same model as rectifying device in three-phase synchronous rectification circuit, optocoupler every
Trigger signal is generated by the optocoupler of same model from circuit, optocoupler internal body diodes are controlled using the natural commutation point of AC signal
Break-make provide the synchronous rectification with isolation features to drive the break-make of triode inside optocoupler for circuit of synchronous rectification
Driving control signal, while exchange supplies electricity to power supply while rectification major loop provides signal also by synchrotrans to optocoupler
Input terminal provides power supply signal, to control the break-make of triode inside optocoupler, make the break-make of triode inside optocoupler simultaneously by
The break-make of diode and the influence of ac signal, the common participation of optocoupler light emitting diode and synchronizing voltage device, can also be right
The generation of synchronizing signal provides duplicate protection, keeps trigger signal accurately reliable, improves rectification circuit stability.
The trigger circuit of the patent No. 20520398658.2 is made of diode rectifier bridge, optocoupler and power module of voltage regulation, no
External power supply module is only needed, and is difficult to realize accurate synchronization, while the reverse recovery characteristic extender that diode is intrinsic
The part turn-off time can lead to transformer short-circuit, and control accuracy is low, poor reliability, so this patent considers isolated passive self-powered
Optocoupler synchronizes trigger circuit to replace diode to form, to improve the rectification reliability of entire circuit.
Specific implementation mode two
Specifically, as shown in figure 4, further including the first voltage stabilizing element, the second voltage stabilizing element, third voltage stabilizing element, the 4th steady
Press element, the 5th voltage stabilizing element and the 6th voltage stabilizing element；First voltage stabilizing element includes resistance R31 and zener diode DZ1,
Second voltage stabilizing element includes resistance R32 and zener diode DZ2, and the third voltage stabilizing element includes resistance R33 and voltage stabilizing
Diode DZ3, the 4th voltage stabilizing element include resistance R34 and zener diode DZ4, and the 5th voltage stabilizing element includes resistance R35
With zener diode DZ5, the 6th voltage stabilizing element includes resistance R36 and zener diode DZ6；One end of the resistance R31
The emitter of optocoupler D1 output ends is connected with the cathode of zener diode DZ1, and is connect with the grid of Q1, and resistance R31's is another
End connects the negative output terminal N of rectification output loop with the anode of zener diode DZ1；One end of the resistance R32 and voltage stabilizing two
The emitter of the cathode connection optocoupler D2 output ends of pole pipe DZ2, and connect with the grid of Q2, the other end of resistance R32 and voltage stabilizing
The negative output terminal N of the anode connection rectification output loop of diode DZ2；The cathode of one end and zener diode DZ3 of resistance R33
The emitter of optocoupler D3 output ends is connected, and is connect with the grid of Q3, the sun of the other end and zener diode DZ3 of resistance R33
Pole connects the negative output terminal N of rectification output loop；It is defeated that one end of resistance R34 with the cathode of zener diode DZ4 connects optocoupler D4
The emitter of outlet, and being connect with the grid of Q4, it is defeated that the other end and the anode of zener diode DZ4 of resistance R34 connect rectification
Go out the negative output terminal N in circuit；One end of resistance R35 connects the emitter of optocoupler D5 output ends with the cathode of zener diode DZ5,
And connect with the grid of Q5, the other end of resistance R35 connects the negative output of rectification output loop with the anode of zener diode DZ5
Hold N；One end of resistance R36 connects the emitter of optocoupler D6 output ends with the cathode of zener diode DZ6, and connects with the grid of Q6
It connects, the other end of resistance R36 connects the negative output terminal N of rectification output loop with the anode of zener diode DZ6.
Specific implementation mode three
Specifically, as shown in Fig. 2, the AC power be 220V, the AC power after transformer T, respectively with
The diode cathode of optocoupler D4, D6, D2 are connected with the diode cathode of optocoupler D1, D3, D5, and the net of the rectified three-phase circuit is surveyed
It is connected with three-phase synchronous transformer M, the triode of the output end and optocoupler D4, D6, D2, D1, D3, D5 of three-phase synchronous transformer M
Collector connected respectively with resistance R25 by resistance R24, resistance R26, resistance R22, resistance R21, resistance R23, be optocoupler
The triode of D4, D6, D2, D1, D3 and D5 are powered, to control the energization of triode electric power loop.
Specific implementation mode four
Specifically, the three-phase synchronous rectification circuit is connected using three-phase bridge rectifier circuit mode, rectified three-phase circuit
Input terminal connection transformer T low-voltage coil, the output end of the output end of transformer T as three-phase synchronous transformer M.
Specific implementation mode five
Specifically, as shown in figure 3, the cathode of the anode of the optocoupler D1 input terminal diodes, D4 input terminal diodes connects
Connect the drain electrode of the source electrode and metal-oxide-semiconductor Q4 of metal-oxide-semiconductor Q1, the anode of optocoupler D3 input terminal diodes, the cathode of D6 input terminal diodes
Connect the drain electrode of the source electrode and metal-oxide-semiconductor Q6 of metal-oxide-semiconductor Q3, the anode of optocoupler D5 input terminal diodes, the moon of D2 input terminal diodes
Pole connects the drain electrode of the source electrode and metal-oxide-semiconductor Q2 of metal-oxide-semiconductor Q5, and the cathode of optocoupler D1, D3, D5 input terminal diode passes through resistance R40
Connect the anode of optocoupler D2, D4, D6 input terminal diode；The grid of the emitter connection metal-oxide-semiconductor Q1 of optocoupler D1 output ends, optocoupler
The grid of the emitter connection metal-oxide-semiconductor Q2 of D2 output ends, the grid of the emitter connection metal-oxide-semiconductor Q3 of optocoupler D3 output ends, optocoupler
The grid of the emitter connection metal-oxide-semiconductor Q4 of D4 output ends, the grid of the emitter connection metal-oxide-semiconductor Q5 of optocoupler D5 output ends, optocoupler
The grid of the emitter connection metal-oxide-semiconductor Q61 of D6 output ends；The grid of metal-oxide-semiconductor Q2, Q4, Q6 are respectively by the second voltage stabilizing element, and
Four voltage stabilizing elements, the 6th voltage stabilizing element are connected with the source level of metal-oxide-semiconductor Q2, Q4, Q6, and the source level of metal-oxide-semiconductor Q2, Q4, Q6 are connected to one
It rises；The grid of metal-oxide-semiconductor Q1, Q3, Q5 pass through the first voltage stabilizing element, third voltage stabilizing element, the 5th voltage stabilizing element and metal-oxide-semiconductor respectively
The source level of Q1, Q3, Q5 are connected.
First voltage stabilizing element, the second voltage stabilizing element, third voltage stabilizing element, the 4th voltage stabilizing element, the 5th voltage stabilizing element
Stabilization played to the emitter output voltage of optocoupler output with the 6th voltage stabilizing element, improve metal-oxide-semiconductor Q1, Q2, Q3, Q4,
The stability of Q5 and Q6 grid voltages.
Specific implementation mode six
It is a kind of to realize the same of isolated passive self-powered optocoupler three-phase synchronous rectification circuit realization based on the synchrotrans
It walks transformer and realizes isolated passive self-powered optocoupler three-phase synchronous rectification method, including when transformer T is connected, three-phase synchronous is whole
Current circuit is in running order, bridge arm on metal-oxide-semiconductor Q1, Q3, Q5 composition, and metal-oxide-semiconductor Q4, Q6, Q2 form lower bridge arm, transformer T's
Low-voltage coil end generates three-phase alternating current and is sent into three-phase synchronous rectification circuit, according to the characteristic of three-phase alternating current, synchronization meeting
Make and only make the conducting of two optocouplers, as a certain moment a phase voltages of three-phase alternating current are maximum, b phase voltage minimums when, utilize synchronization
The secondary side winding method of transformer can guarantee the transistor collector reliable power supply that the output induced potential of V1 and V6 makes D1 and D6
Work, while electric current flows into the anode of optocoupler D1 input terminal diodes, then the cathode stream from optocoupler D1 input terminal diodes from a points
Go out, at this time the diode current flow of optocoupler D1, while the collector of the triode of optocoupler D1 makes optocoupler D1 under the excitation of V1 power supplys
Conducting generates G1 gate pole trigger signals, then metal-oxide-semiconductor Q1 triggering and conductings, and then electric current flows into optocoupler D6 input terminals through resistance R40
The anode of diode, then flowed out from the cathode of optocoupler D6 input terminal diodes, and the collector of the triode of optocoupler D6 is in V6
Power supply excitation is lower so that optocoupler D6 conductings, generate G6 gate pole trigger signals, then metal-oxide-semiconductor Q6 triggering and conductings, to make metal-oxide-semiconductor
Q1, Q6 are simultaneously turned on, and composition current loop is load supplying.
Triode inside the break-make and optocoupler of optocoupler internal body diodes is controlled using the natural commutation point of three-phase ac signal
The break-make of triode inside optocoupler is carried out while being driven to the presence or absence of collector supply pumping signal, so that photoelectric coupled circuit is not required to external additional
Power supply, due to it avoids and was caused in the past in natural commutation point to the power supply of optocoupler inside transistor collector since diode is solid because always
Some reverse recovery characteristics extend the device turn-off time and cause bridge arm or lower bridge arm simultaneously there are two metal-oxide-semiconductor conducting to
Make transformer short-circuit.The common participation of optocoupler light emitting diode and synchrotrans can provide the generation of synchronizing signal double
It protects again.It is synchronous with three-phase input voltage to further realize metal-oxide-semiconductor trigger signal, using three-phase synchronous rectification principle, optocoupler every
From optocoupler D1-D6 in circuit can according to the phase conduction of three-phase alternating current, i.e., on synchronization bridge arm, lower bridge arm it is each there are one
Metal-oxide-semiconductor simultaneously turns on, and provides the synchronous rectification driving control signal with isolation features for three-phase synchronous rectification circuit, makes triggering
Signal is accurately reliable, improves rectification circuit stability, avoids dedicated single chip microcomputer driving circuit, simplifies control loop,
Reduce cost.
Due to the simplification of control loop, the circuit of synchronous rectification modularization of optocoupler self-powered can both be can be applied to high frequency
Switching Power Supply can also be integrated in the inside of alternating current generator, and the accessory power supply of optocoupler self-driving circuit is by rectification circuit
The synchronized transformer of input terminal provides, and synchronous with rectifier bridge holding, then optocoupler self-powered does not need additional power supply power supply, from
And realize passive, it effectively prevents the intrinsic reverse recovery characteristic of diode and extends the device turn-off time and cause transformer short
Road.Optocoupler interior light emitting diodes are to the detection of natural commutation point with synchrotrans to optocoupler inside triode power supply
Switching can provide duplicate protection to the output of synchronous control drive signal.
Above example is only to the exemplary description of this patent does not limit its scope of protection, people in the art
Member can also be changed its part, as long as it does not exceed the essence of this patent, within the protection scope of the present patent.
Claims (6)
1. a kind of synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit, which is characterized in that including three
Be synchronised rectification circuit, optical coupling isolation circuit, synchrotrans, AC power and load；The three-phase synchronous rectification circuit packet
Include metal-oxide-semiconductor Q1, Q2, Q3, Q4, Q5 and Q6；The synchrotrans include transformer T and three-phase synchronous transformer M；The optocoupler
Isolation circuit includes optocoupler D1, D2, D3, D4, D5 and D6 of same model；The ac power output is separately connected synchronous change
Depressor, three-phase synchronous rectification circuit and optical coupling isolation circuit, the synchronous transformation connect optical coupling isolation circuit, the light-coupled isolation
Circuit connects three-phase synchronous rectification circuit, the three-phase synchronous rectification circuit connection load.
2. synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit according to claim 1, special
Sign is, further includes the first voltage stabilizing element, the second voltage stabilizing element, third voltage stabilizing element, the 4th voltage stabilizing element, the 5th voltage stabilizing element
With the 6th voltage stabilizing element；First voltage stabilizing element includes resistance R31 and zener diode DZ1, the second voltage stabilizing element packet
Resistance R32 and zener diode DZ2 are included, the third voltage stabilizing element includes resistance R33 and zener diode DZ3, the 4th voltage stabilizing
Element includes resistance R34 and zener diode DZ4, and the 5th voltage stabilizing element includes resistance R35 and zener diode DZ5, institute
It includes resistance R36 and zener diode DZ6 to state the 6th voltage stabilizing element；The moon of one end and zener diode DZ1 of the resistance R31
Pole connects the emitter of optocoupler D1 output ends, and is connect with the grid of Q1, the other end of resistance R31 and zener diode DZ1's
Anode connects the input terminal a of commutating circuit；It is defeated that one end of the resistance R32 with the cathode of zener diode DZ2 connects optocoupler D2
The emitter of outlet, and being connect with the grid of Q2, it is defeated that the other end and the anode of zener diode DZ2 of resistance R32 connect rectification
Go out the negative output terminal N in circuit；One end of resistance R33 connects the emitter of optocoupler D3 output ends with the cathode of zener diode DZ3,
And connect with the grid of Q3, the other end of resistance R33 connects the input terminal b of commutating circuit with the anode of zener diode DZ3；Electricity
One end of resistance R34 connects the emitter of optocoupler D4 output ends with the cathode of zener diode DZ4, and is connect with the grid of Q4, electricity
The other end of resistance R34 connects the negative output terminal N of rectification output loop with the anode of zener diode DZ4；One end of resistance R35 and
The emitter of the cathode connection optocoupler D5 output ends of zener diode DZ5, and connect with the grid of Q5, the other end of resistance R35
The input terminal c of commutating circuit is connected with the anode of zener diode DZ5；The cathode of one end and zener diode DZ6 of resistance R36
The emitter of optocoupler D6 output ends is connected, and is connect with the grid of Q6, the sun of the other end and zener diode DZ6 of resistance R36
Pole connects the negative output terminal N of rectification output loop.
3. synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit according to claim 2, special
Sign is, the AC power is 220V, the AC power after transformer T, respectively with two poles of optocoupler D4, D6, D2
Pipe cathode is connected with the diode cathode of optocoupler D1, D3, D5, and the net of the rectified three-phase circuit is surveyed and three-phase synchronous transformer M
It is connected, the output end of three-phase synchronous transformer M and the collector of the triode of optocoupler D4, D6, D2, D1, D3, D5 pass through electricity respectively
Resistance R24, resistance R26, resistance R22, resistance R21, resistance R23 are connected with resistance R25.
4. synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit according to claim 3, special
Sign is that the three-phase synchronous rectification circuit is connected using three-phase bridge rectifier circuit mode, the input terminal of rectified three-phase circuit
Connect the low-voltage coil of transformer T, the output end of the output end of transformer T as three-phase synchronous transformer M.
5. synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit according to claim 4, special
Sign is, the anode of the optocoupler D1 input terminal diodes, the cathode connection metal-oxide-semiconductor Q1 of D4 input terminal diodes source electrode and
The drain electrode of metal-oxide-semiconductor Q4, the anode of optocoupler D3 input terminal diodes, the cathode of D6 input terminal diodes connect the source electrode of metal-oxide-semiconductor Q3
With the drain electrode of metal-oxide-semiconductor Q6, the anode of optocoupler D5 input terminal diodes, the cathode of D2 input terminal diodes connect the source of metal-oxide-semiconductor Q5
The cathode of the drain electrode of pole and metal-oxide-semiconductor Q2, optocoupler D1, D3, D5 input terminal diode is defeated by resistance R40 connection optocouplers D2, D4, D6
Enter to hold the anode of diode；The grid of the emitter connection metal-oxide-semiconductor Q1 of optocoupler D1 output ends, the emitter of optocoupler D2 output ends connect
The grid of metal-oxide-semiconductor Q2, the grid of the emitter connection metal-oxide-semiconductor Q3 of optocoupler D3 output ends are connect, the emitter of optocoupler D4 output ends connects
The grid of metal-oxide-semiconductor Q4, the grid of the emitter connection metal-oxide-semiconductor Q5 of optocoupler D5 output ends are connect, the emitter of optocoupler D6 output ends connects
Connect the grid of metal-oxide-semiconductor Q61；The grid of metal-oxide-semiconductor Q2, Q4, Q6 are respectively by the second voltage stabilizing element, and the 4th voltage stabilizing element, the 6th is steady
Pressure element is connected with the source level of metal-oxide-semiconductor Q2, Q4, Q6, and the source level of metal-oxide-semiconductor Q2, Q4, Q6 link together；Metal-oxide-semiconductor Q1, Q3, Q5's
Grid is respectively by the first voltage stabilizing element, third voltage stabilizing element, and the 5th voltage stabilizing element is connected with the source level of metal-oxide-semiconductor Q1, Q3, Q5.
6. one kind realizing isolated passive self-powered optocoupler three-phase synchronous based on the synchrotrans of claim 1,2,3,4 or 5
The synchrotrans that rectification circuit is realized realize isolated passive self-powered optocoupler three-phase synchronous rectification method, which is characterized in that packet
Include following steps：
Step a, when transformer T is connected, three-phase synchronous rectification circuit is in running order, bridge on metal-oxide-semiconductor Q1, Q3, Q5 composition
Arm, metal-oxide-semiconductor Q4, Q6, Q2 form lower bridge arm, and the low-voltage coil end of transformer T generates three-phase alternating current and is sent into three-phase synchronous rectification
Circuit；
Step b, according to the characteristic of three-phase alternating current, synchronization can make and only make the conducting of two optocouplers, three-phase alternating current certain
When one moment a phase voltage maximum, b phase voltage minimums, the secondary side winding method of synchrotrans is utilized to ensure the output of V1 and V6
Induced potential makes the transistor collector reliable power supply of D1 and D6 work, while electric current flows into two pole of optocoupler D1 input terminals from a points
The anode of pipe flows out, at this time the diode current flow of optocoupler D1 from the cathode of optocoupler D1 input terminal diodes；
Step c, while the collector of the triode of optocoupler D1 makes optocoupler D1 conductings under the excitation of V1 power supplys, generates G1 gate poles and touches
It signals, then metal-oxide-semiconductor Q1 triggering and conductings, electric current flows into the anode of optocoupler D6 input terminal diodes through resistance R40, from optocoupler D6
The cathode of input terminal diode flows out, and the collector of the triode of optocoupler D6 makes optocoupler D6 lead under the excitation of V6 power supplys
It is logical, G6 gate pole trigger signals are generated, then metal-oxide-semiconductor Q6 triggering and conductings；
Step d, simultaneously turn on metal-oxide-semiconductor Q1, Q6, composition current loop is load supplying.
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| CN111426927A (en) * | 2018-12-24 | 2020-07-17 | 东南大学 | Dynamic electrical stress applying device and testing method for power semiconductor device |
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