CN108599601B - Synchronous transformer-implemented isolated passive self-driven optocoupler three-phase synchronous rectification circuit and method thereof - Google Patents
Synchronous transformer-implemented isolated passive self-driven optocoupler three-phase synchronous rectification circuit and method thereof Download PDFInfo
- Publication number
- CN108599601B CN108599601B CN201810712041.1A CN201810712041A CN108599601B CN 108599601 B CN108599601 B CN 108599601B CN 201810712041 A CN201810712041 A CN 201810712041A CN 108599601 B CN108599601 B CN 108599601B
- Authority
- CN
- China
- Prior art keywords
- optocoupler
- resistor
- voltage stabilizing
- transformer
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002955 isolation Methods 0.000 claims abstract description 27
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 79
- 230000001960 triggered effect Effects 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
An isolated passive self-driven optocoupler three-phase synchronous rectification circuit for a synchronous transformer and a method thereof belong to the field of rectification circuits; the device comprises a three-phase synchronous rectification circuit, an optical coupling isolation circuit, a synchronous transformer, an alternating current power supply and a load; the three-phase synchronous rectification circuit comprises MOS transistors Q1, Q2, Q3, Q4, Q5 and Q6; the synchronous transformer comprises a transformer T and a three-phase synchronous transformer M; the optical coupler isolation circuit comprises optical couplers D1, D2, D3, D4, D5 and D6 with the same model; the output end of the alternating current power supply is respectively connected with a synchronous transformer, a three-phase synchronous rectification circuit and an optocoupler isolation circuit, the synchronous transformer is connected with the optocoupler isolation circuit, the optocoupler isolation circuit is connected with the three-phase synchronous rectification circuit, and the three-phase synchronous rectification circuit is connected with a load; the invention ensures that the trigger signal is accurate and reliable, improves the stability of the rectifying circuit, avoids a special singlechip driving circuit, simplifies a control loop and reduces the cost.
Description
Technical Field
The invention belongs to the field of rectifier circuits, and particularly relates to an isolated passive self-driven optocoupler three-phase synchronous rectifier circuit for a synchronous transformer and a method thereof.
Background
At present, along with the deeper and deeper national energy conservation and emission reduction policies, the continuous improvement of science and technology and the research and development of novel materials, people pay more attention to the improvement of efficiency, and as equipment with high power consumption, the speed regulation proportion of a motor adopting a frequency converter is also higher and higher. The frequency converter is an electric energy control device which converts a power frequency power supply into another frequency by utilizing the on-off action of a power semiconductor device, the frequency converter firstly converts the electric energy of an alternating current power supply into direct current, then converts the direct current into alternating current with variable frequency to drive a load, and a power MOSFET is adopted to replace a rectifying diode of a rectifying circuit, so that the characteristic of low on-state resistance of the frequency converter is fully exerted, the rectifying loss can be greatly reduced, and the power efficiency is improved. The success and failure of the MOSFET device to rectify instead of the rectifier diode is that whether the trigger signal for the MOSFET device can be synchronized with the three-phase input voltage, and most important is the accurate and reliable control of the synchronous rectification control signal during synchronous rectification.
According to the working principle of the three-phase rectifying circuit, the conduction angle of each MOSFET should be less than or equal to 120 degrees in a complete period, according to the three-phase alternating current characteristic, namely the rule of a natural reversing point, alternating current signals are subjected to phase change once every 60 degrees, and whenever the upper bridge arm and the lower bridge arm only need to be guaranteed to be conducted by one pipe, if two or more pipes are conducted simultaneously in the same group, serious faults such as interphase short circuit and the like on the network side can be caused, MOSFETs of the rectifying circuit break down and cannot work, and the stability and reliability of synchronous triggering signals are important preconditions for guaranteeing that the rectifying circuit can work normally.
Disclosure of Invention
Aiming at the problems, the invention overcomes the defects of the prior art and provides a method for realizing an isolated passive self-driven optocoupler three-phase synchronous rectification circuit of a synchronous transformer.
The technical scheme of the invention is as follows:
an isolated passive self-driven optocoupler three-phase synchronous rectification circuit for a synchronous transformer comprises a three-phase synchronous rectification circuit, an optocoupler isolation circuit, the synchronous transformer, an alternating current power supply and a load; the three-phase synchronous rectification circuit comprises MOS transistors Q1, Q2, Q3, Q4, Q5 and Q6; the synchronous transformer comprises a transformer T and a three-phase synchronous transformer M; the optical coupler isolation circuit comprises optical couplers D1, D2, D3, D4, D5 and D6 with the same model; the alternating current power supply output end is respectively connected with a synchronous transformer, a three-phase synchronous rectification circuit and an optocoupler isolation circuit, the synchronous transformer is connected with the optocoupler isolation circuit, the optocoupler isolation circuit is connected with the three-phase synchronous rectification circuit, and the three-phase synchronous rectification circuit is connected with a load.
Further, the device further comprises a first voltage stabilizing element, a second voltage stabilizing element, a third voltage stabilizing element, a fourth voltage stabilizing element, a fifth voltage stabilizing element and a sixth voltage stabilizing element; the first voltage stabilizing element comprises a resistor R31 and a voltage stabilizing diode DZ1, the second voltage stabilizing element comprises a resistor R32 and a voltage stabilizing diode DZ2, the third voltage stabilizing element comprises a resistor R33 and a voltage stabilizing diode DZ3, the fourth voltage stabilizing element comprises a resistor R34 and a voltage stabilizing diode DZ4, the fifth voltage stabilizing element comprises a resistor R35 and a voltage stabilizing diode DZ5, and the sixth voltage stabilizing element comprises a resistor R36 and a voltage stabilizing diode DZ6; one end of the resistor R31 and the cathode of the zener diode DZ1 are connected with the emitter of the output end of the optocoupler D1 and are connected with the grid electrode of the Q1, and the other end of the resistor R31 and the anode of the zener diode DZ1 are connected with the input end a of the rectifying circuit; one end of the resistor R32 and the cathode of the zener diode DZ2 are connected with the emitter of the output end of the optocoupler D2 and are connected with the grid electrode of the Q2, and the other end of the resistor R32 and the anode of the zener diode DZ2 are connected with the negative output end N of the rectifying output loop; one end of a resistor R33 and the cathode of the zener diode DZ3 are connected with the emitter of the output end of the optocoupler D3 and are connected with the grid electrode of the Q3, and the other end of the resistor R33 and the anode of the zener diode DZ3 are connected with the input end b of the rectifying circuit; one end of a resistor R34 and the cathode of the zener diode DZ4 are connected with the emitter of the output end of the optocoupler D4 and are connected with the grid electrode of the Q4, and the other end of the resistor R34 and the anode of the zener diode DZ4 are connected with the input end c of the rectifying circuit; one end of a resistor R35 and the cathode of the zener diode DZ5 are connected with the emitter of the output end of the optocoupler D5 and are connected with the grid electrode of the Q5, and the other end of the resistor R35 and the anode of the zener diode DZ5 are connected with the negative output end N of the rectifying output loop; one end of a resistor R36 and the cathode of the zener diode DZ6 are connected with the emitter of the output end of the optocoupler D6 and are connected with the grid electrode of the Q6, and the other end of the resistor R36 and the anode of the zener diode DZ6 are connected with the negative output end N of the rectifying output loop.
Further, the ac power supply is 220V, after passing through the transformer T, the ac power supply is respectively connected with the cathodes of the diodes of the optocouplers D4, D6 and D2 and the anodes of the diodes of the optocouplers D1, D3 and D5, the network test of the three-phase rectifying circuit is connected with the three-phase synchronous transformer M, and the output end of the three-phase synchronous transformer M is connected with the collectors of the triodes of the optocouplers D4, D6, D2, D1, D3 and D5 through the resistor R24, the resistor R26, the resistor R22, the resistor R21, the resistor R23 and the resistor R25.
Further, the three-phase synchronous rectification circuit is connected in a three-phase bridge rectification circuit mode, the input end of the three-phase rectification circuit is connected with the low-voltage coil of the transformer T, and the output end of the transformer T is used as the output end of the three-phase synchronous transformer M.
Further, the anode of the diode at the input end of the optocoupler D1 and the cathode of the diode at the input end of the D4 are connected with the source electrode of the MOS tube Q1 and the drain electrode of the MOS tube Q4, the anode of the diode at the input end of the optocoupler D3 and the cathode of the diode at the input end of the D6 are connected with the source electrode of the MOS tube Q3 and the drain electrode of the MOS tube Q6, the anode of the diode at the input end of the optocoupler D5 and the cathode of the diode at the input end of the D2 are connected with the source electrode of the MOS tube Q5 and the drain electrode of the MOS tube Q2, and the cathodes of the diodes at the input ends of the optocouplers D1, D3 and D5 are connected with the anodes of the diodes at the input ends of the optocouplers D2, D4 and D6 through resistors R40; an emitter of an output end of the optocoupler D1 is connected with a grid electrode of the MOS tube Q1, an emitter of an output end of the optocoupler D2 is connected with a grid electrode of the MOS tube Q2, an emitter of an output end of the optocoupler D3 is connected with a grid electrode of the MOS tube Q3, an emitter of an output end of the optocoupler D4 is connected with a grid electrode of the MOS tube Q4, an emitter of an output end of the optocoupler D5 is connected with a grid electrode of the MOS tube Q5, and an emitter of an output end of the optocoupler D6 is connected with a grid electrode of the MOS tube Q61; the grid electrodes of the MOS transistors Q2, Q4 and Q6 are respectively connected with the source stages of the MOS transistors Q2, Q4 and Q6 through a second voltage stabilizing element, a fourth voltage stabilizing element and a sixth voltage stabilizing element, and the source stages of the MOS transistors Q2, Q4 and Q6 are connected together; the grid electrodes of the MOS transistors Q1, Q3 and Q5 are respectively connected with the source stages of the MOS transistors Q1, Q3 and Q5 through a first voltage stabilizing element, a third voltage stabilizing element and a fifth voltage stabilizing element.
A synchronous transformer realization isolation type passive self-driven optocoupler three-phase synchronous rectification method based on the synchronous transformer realization isolation type passive self-driven optocoupler three-phase synchronous rectification circuit comprises the following steps:
step a, when a transformer T is connected, a three-phase synchronous rectification circuit is in a working state, MOS tubes Q1, Q3 and Q5 form an upper bridge arm, MOS tubes Q4, Q6 and Q2 form a lower bridge arm, and a low-voltage coil end of the transformer T generates three-phase alternating current and sends the three-phase alternating current to the three-phase synchronous rectification circuit;
step b, according to the characteristics of three-phase alternating current, only two optocouplers are conducted at the same time, when the a-phase voltage is maximum and the b-phase voltage is minimum at a certain time of the three-phase alternating current, the secondary winding mode of a synchronous transformer is utilized to ensure that output induction potentials of V1 and V6 enable triode collectors of D1 and D6 to reliably supply power to work, meanwhile, current flows into an anode of a diode at the input end of the optocoupler D1 from the point a, flows out from a cathode of the diode at the input end of the optocoupler D1, and at the moment, the diode of the optocoupler D1 is conducted;
step c, simultaneously, the collector of the triode of the optocoupler D1 enables the optocoupler D1 to be conducted under the excitation of a V1 power supply, a G1 gate trigger signal is generated, then the MOS transistor Q1 is triggered and conducted, current flows into the anode of the diode at the input end of the optocoupler D6 through the resistor R40 and flows out of the cathode of the diode at the input end of the optocoupler D6, and the collector of the triode of the optocoupler D6 enables the optocoupler D6 to be conducted under the excitation of the V6 power supply, a G6 gate trigger signal is generated, and then the MOS transistor Q6 is triggered and conducted;
and d, conducting the MOS transistors Q1 and Q6 simultaneously to form a current loop for supplying power to the load.
Compared with the prior art, the invention has the following beneficial effects:
the invention realizes the synchronization of the MOS tube trigger signal and the AC input voltage by utilizing the optocoupler, and utilizes the zero crossing point of the single-phase AC signal or the natural reversing point of the three-phase AC signal to control the on-off of the diode in the optocoupler so as to drive the on-off of the triode in the optocoupler, thereby providing a synchronous rectification driving control signal with an isolation function for the MOSFET to realize a synchronous rectification circuit, providing a synchronous power supply for the output side of the optocoupler by the synchronous transformer while providing a power supply for the rectification main loop by the AC input power supply, enabling the on-off of the triode in the optocoupler to be influenced by the on-off of the diode and the AC power supply at the same time, and providing double protection for the generation of the synchronous signal by the joint participation of the optocoupler light emitting diode and the synchronous voltage. The trigger signal is accurate and reliable, the stability of the rectifying circuit is improved, a special singlechip driving circuit is avoided, a control loop is simplified, the cost is reduced, the power supply of an external power supply of an optocoupler is canceled, the passive driving is realized, and the problems of complexity of a synchronous rectifying control circuit and low reliability of the control signal are solved.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a circuit diagram of the transformer T.
Fig. 3 is a circuit diagram of a three-phase synchronous transformer M.
Fig. 4 is a circuit diagram of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Detailed description of the preferred embodiments
An isolated passive self-driven optocoupler three-phase synchronous rectification circuit for a synchronous transformer is realized, as shown in fig. 1, and comprises a three-phase synchronous rectification circuit, an optocoupler isolation circuit, a synchronous transformer, an alternating current power supply and a load; the three-phase synchronous rectification circuit comprises MOS transistors Q1, Q2, Q3, Q4, Q5 and Q6; the synchronous transformer comprises a transformer T and a three-phase synchronous transformer M; the optical coupler isolation circuit comprises optical couplers D1, D2, D3, D4, D5 and D6 with the same model; the alternating current power supply output end is respectively connected with a synchronous transformer, a three-phase synchronous rectification circuit and an optocoupler isolation circuit, the synchronous transformer is connected with the optocoupler isolation circuit, the optocoupler isolation circuit is connected with the three-phase synchronous rectification circuit, and the three-phase synchronous rectification circuit is connected with a load.
The working process comprises the following steps: the three-phase synchronous rectification circuit uses the same type of power MOSFET as a rectification device, the optocoupler isolation circuit uses the same type of optocoupler to generate a trigger signal, the natural reversing point of the alternating current signal is used for controlling the on-off of an internal diode of the optocoupler, so that the on-off of an internal triode of the optocoupler is driven, synchronous rectification driving control signals with isolation function are provided for the synchronous rectification circuit, meanwhile, the alternating current provides signals for a rectification main loop, and simultaneously provides power signals for a power input end of the optocoupler through a synchronous transformer, so that the on-off of the internal triode of the optocoupler is controlled, the on-off of the internal triode of the optocoupler is influenced by the on-off of the diode and the alternating current signal, and the optocoupler light emitting diode and the synchronous voltage are jointly participated in, so that double protection can be provided for the generation of the synchronous signal, the trigger signal is accurate and reliable, and the stability of the rectification circuit is improved.
The trigger circuit of patent number 20520398658.2 comprises diode rectifier bridge, opto-coupler and regulated power supply module, not only need external power supply module, is difficult to realize accurate synchronization moreover, and the inherent reverse recovery characteristic extension device turn-off time of diode can lead to the transformer short circuit simultaneously, and control accuracy is low, and the reliability is poor, so this patent considers replacing the synchronous trigger circuit of diode group with isolated formula no source drive opto-coupler to the rectification reliability of whole circuit has been improved.
Detailed description of the preferred embodiments
Specifically, as shown in fig. 4, the device further includes a first voltage stabilizing element, a second voltage stabilizing element, a third voltage stabilizing element, a fourth voltage stabilizing element, a fifth voltage stabilizing element, and a sixth voltage stabilizing element; the first voltage stabilizing element comprises a resistor R31 and a voltage stabilizing diode DZ1, the second voltage stabilizing element comprises a resistor R32 and a voltage stabilizing diode DZ2, the third voltage stabilizing element comprises a resistor R33 and a voltage stabilizing diode DZ3, the fourth voltage stabilizing element comprises a resistor R34 and a voltage stabilizing diode DZ4, the fifth voltage stabilizing element comprises a resistor R35 and a voltage stabilizing diode DZ5, and the sixth voltage stabilizing element comprises a resistor R36 and a voltage stabilizing diode DZ6; one end of the resistor R31 and the cathode of the zener diode DZ1 are connected with the emitter of the output end of the optocoupler D1 and are connected with the grid electrode of the Q1, and the other end of the resistor R31 and the anode of the zener diode DZ1 are connected with the negative output end N of the rectifying output loop; one end of the resistor R32 and the cathode of the zener diode DZ2 are connected with the emitter of the output end of the optocoupler D2 and are connected with the grid electrode of the Q2, and the other end of the resistor R32 and the anode of the zener diode DZ2 are connected with the negative output end N of the rectifying output loop; one end of a resistor R33 and the cathode of the zener diode DZ3 are connected with the emitter of the output end of the optocoupler D3 and are connected with the grid electrode of the Q3, and the other end of the resistor R33 and the anode of the zener diode DZ3 are connected with the negative output end N of the rectifying output loop; one end of a resistor R34 and the cathode of the zener diode DZ4 are connected with the emitter of the output end of the optocoupler D4 and are connected with the grid electrode of the Q4, and the other end of the resistor R34 and the anode of the zener diode DZ4 are connected with the negative output end N of the rectifying output loop; one end of a resistor R35 and the cathode of the zener diode DZ5 are connected with the emitter of the output end of the optocoupler D5 and are connected with the grid electrode of the Q5, and the other end of the resistor R35 and the anode of the zener diode DZ5 are connected with the negative output end N of the rectifying output loop; one end of a resistor R36 and the cathode of the zener diode DZ6 are connected with the emitter of the output end of the optocoupler D6 and are connected with the grid electrode of the Q6, and the other end of the resistor R36 and the anode of the zener diode DZ6 are connected with the negative output end N of the rectifying output loop.
Detailed description of the preferred embodiments
Specifically, as shown in fig. 2, the ac power supply is 220V, after passing through the transformer T, the ac power supply is respectively connected with the cathodes of the diodes of the optocouplers D4, D6 and D2 and the anodes of the diodes of the optocouplers D1, D3 and D5, the network test of the three-phase rectifier circuit is connected with the three-phase synchronous transformer M, and the output end of the three-phase synchronous transformer M is respectively connected with the collectors of the triodes of the optocouplers D4, D6, D2, D1, D3 and D5 through the resistor R24, the resistor R26, the resistor R22, the resistor R21, the resistor R23 and the resistor R25, so as to supply power to the triodes of the optocouplers D4, D6, D2, D1, D3 and D5, thereby controlling the power on of the triode power supply loop.
Detailed description of the preferred embodiments
Specifically, the three-phase synchronous rectification circuit is connected in a three-phase bridge rectification circuit mode, the input end of the three-phase rectification circuit is connected with the low-voltage coil of the transformer T, and the output end of the transformer T is used as the output end of the three-phase synchronous transformer M.
Detailed description of the preferred embodiments
Specifically, as shown in fig. 3, the anode of the diode at the input end of the optocoupler D1 and the cathode of the diode at the input end of D4 are connected with the source of the MOS transistor Q1 and the drain of the MOS transistor Q4, the anode of the diode at the input end of the optocoupler D3 and the cathode of the diode at the input end of D6 are connected with the source of the MOS transistor Q3 and the drain of the MOS transistor Q6, the anode of the diode at the input end of the optocoupler D5 and the cathode of the diode at the input end of D2 are connected with the source of the MOS transistor Q5 and the drain of the MOS transistor Q2, and the cathodes of the diodes at the input ends of the optocouplers D1, D3 and D5 are connected with the anodes of the diodes at the input ends of the optocouplers D2, D4 and D6 through the resistor R40; an emitter of an output end of the optocoupler D1 is connected with a grid electrode of the MOS tube Q1, an emitter of an output end of the optocoupler D2 is connected with a grid electrode of the MOS tube Q2, an emitter of an output end of the optocoupler D3 is connected with a grid electrode of the MOS tube Q3, an emitter of an output end of the optocoupler D4 is connected with a grid electrode of the MOS tube Q4, an emitter of an output end of the optocoupler D5 is connected with a grid electrode of the MOS tube Q5, and an emitter of an output end of the optocoupler D6 is connected with a grid electrode of the MOS tube Q61; the grid electrodes of the MOS transistors Q2, Q4 and Q6 are respectively connected with the source stages of the MOS transistors Q2, Q4 and Q6 through a second voltage stabilizing element, a fourth voltage stabilizing element and a sixth voltage stabilizing element, and the source stages of the MOS transistors Q2, Q4 and Q6 are connected together; the grid electrodes of the MOS transistors Q1, Q3 and Q5 are respectively connected with the source stages of the MOS transistors Q1, Q3 and Q5 through a first voltage stabilizing element, a third voltage stabilizing element and a fifth voltage stabilizing element.
The first voltage stabilizing element, the second voltage stabilizing element, the third voltage stabilizing element, the fourth voltage stabilizing element, the fifth voltage stabilizing element and the sixth voltage stabilizing element play a role in stabilizing the output voltage of the emitting electrode of the output end of the optocoupler, and the stability of the grid voltages of the MOS transistors Q1, Q2, Q3, Q4, Q5 and Q6 is improved.
Detailed description of the preferred embodiments six
The synchronous transformer realizes the isolated passive self-driven optocoupler three-phase synchronous rectification method based on the synchronous transformer, when the transformer T is connected, the three-phase synchronous rectification circuit is in a working state, MOS transistors Q1, Q3 and Q5 form an upper bridge arm, MOS transistors Q4, Q6 and Q2 form a lower bridge arm, a low-voltage coil end of the transformer T generates three-phase alternating current and sends the three-phase alternating current into the three-phase synchronous rectification circuit, according to the characteristics of the three-phase alternating current, the same time can lead only two optocouplers to be conducted, for example, when a certain time a-phase voltage of the three-phase alternating current is the largest and a b-phase voltage is the smallest, the secondary side winding mode of the synchronous transformer can ensure that the output induction potentials of V1 and V6 enable the collector electrodes of the D1 and the D6 to be reliably powered, meanwhile, current flows into anodes of diodes at the input ends of the optocouplers D1 from a point a, then flows out of cathodes of diodes at the input ends of the optocouplers D1, at the moment, the diodes of the optocouplers D1 are conducted under the excitation of a power supply of the three-phase alternating current, and the MOS transistors of the optocouplers D1 and the diodes Q6 are triggered to be conducted at the input ends of the trigger the diodes, and the MOS diodes of the input ends of the Q6 are triggered to be conducted at the trigger the input ends of the diodes, and the Q6 is triggered, and the current is enabled to be conducted at the input to the input ends of the diodes of the Q6.
The natural commutation point of the three-phase alternating current signal is utilized to control the on-off of the diode in the optocoupler and the on-off of the triode collector power supply excitation signal in the optocoupler to drive the on-off of the triode in the optocoupler simultaneously, so that an external additional power supply is not needed for an optocoupler circuit, and the phenomenon that the upper bridge arm or the lower bridge arm is simultaneously conducted by two MOS (metal oxide semiconductor) tubes at the natural commutation point due to the fact that the power is always supplied to the triode collector in the optocoupler and the turn-off time of the device is prolonged due to the inherent reverse recovery characteristic of the diode is avoided. The optocoupler light emitting diode and the synchronous transformer are participated together, so that double protection can be provided for the generation of synchronous signals. The MOS tube trigger signal and the three-phase input voltage are further synchronous, the three-phase synchronous rectification principle is utilized, the optocouplers D1-D6 in the optocoupler isolation circuit are conducted according to the phase of the three-phase alternating current, namely, one MOS tube is respectively conducted at the same time on the upper bridge arm and the lower bridge arm, and synchronous rectification driving control signals with isolation functions are provided for the three-phase synchronous rectification circuit, so that the trigger signal is accurate and reliable, the stability of the rectification circuit is improved, a special singlechip driving circuit is avoided, a control loop is simplified, and the cost is reduced.
Due to the simplification of the control loop, the synchronous rectification circuit of the optical coupler self-driving circuit can be modularized, the synchronous rectification circuit can be applied to a high-frequency switch power supply, and can be integrated in an alternating current generator, an auxiliary power supply of the optical coupler self-driving circuit is provided by an input end of the rectification circuit through a synchronous transformer and is synchronous with a rectification bridge, and the optical coupler self-driving circuit does not need additional power supply, so that the passive power supply is realized, and the phenomenon that the transformer is short-circuited due to the fact that the inherent reverse recovery characteristic of a diode prolongs the turn-off time of a device is effectively prevented. The detection of the natural reversing point by the light emitting diode in the optocoupler and the switching of the power supply of the triode in the optocoupler by the synchronous transformer can provide double protection for the output of the synchronous control driving signal.
The above embodiments are only illustrative of the present patent and do not limit the protection scope thereof, and those skilled in the art can also change the parts thereof, which are within the protection scope of the present patent without exceeding the spirit of the present patent.
Claims (1)
1. The synchronous transformer realizes the isolated passive self-driven optocoupler three-phase synchronous rectification method, which is characterized in that the synchronous transformer realizes the isolated passive self-driven optocoupler three-phase synchronous rectification circuit which comprises a three-phase synchronous rectification circuit, an optocoupler isolation circuit, a synchronous transformer, an alternating current power supply and a load; the three-phase synchronous rectification circuit comprises MOS transistors Q1, Q2, Q3, Q4, Q5 and Q6; the synchronous transformer comprises a transformer T and a three-phase synchronous transformer M; the optical coupler isolation circuit comprises optical couplers D1, D2, D3, D4, D5 and D6 with the same model; the output end of the alternating current power supply is respectively connected with a synchronous transformer, a three-phase synchronous rectification circuit and an optocoupler isolation circuit, the synchronous transformer is connected with the optocoupler isolation circuit, the optocoupler isolation circuit is connected with the three-phase synchronous rectification circuit, and the three-phase synchronous rectification circuit is connected with a load;
the device further comprises a first voltage stabilizing element, a second voltage stabilizing element, a third voltage stabilizing element, a fourth voltage stabilizing element, a fifth voltage stabilizing element and a sixth voltage stabilizing element; the first voltage stabilizing element comprises a resistor R31 and a voltage stabilizing diode DZ1, the second voltage stabilizing element comprises a resistor R32 and a voltage stabilizing diode DZ2, the third voltage stabilizing element comprises a resistor R33 and a voltage stabilizing diode DZ3, the fourth voltage stabilizing element comprises a resistor R34 and a voltage stabilizing diode DZ4, the fifth voltage stabilizing element comprises a resistor R35 and a voltage stabilizing diode DZ5, and the sixth voltage stabilizing element comprises a resistor R36 and a voltage stabilizing diode DZ6; one end of the resistor R31 and the cathode of the zener diode DZ1 are connected with the emitter of the output end of the optocoupler D1 and are connected with the grid electrode of the Q1, and the other end of the resistor R31 and the anode of the zener diode DZ1 are connected with the input end a of the rectifying circuit; one end of the resistor R32 and the cathode of the zener diode DZ2 are connected with the emitter of the output end of the optocoupler D2 and are connected with the grid electrode of the Q2, and the other end of the resistor R32 and the anode of the zener diode DZ2 are connected with the negative output end N of the rectifying output loop; one end of a resistor R33 and the cathode of the zener diode DZ3 are connected with the emitter of the output end of the optocoupler D3 and are connected with the grid electrode of the Q3, and the other end of the resistor R33 and the anode of the zener diode DZ3 are connected with the input end b of the rectifying circuit; one end of a resistor R34 and the cathode of the zener diode DZ4 are connected with the emitter of the output end of the optocoupler D4 and are connected with the grid electrode of the Q4, and the other end of the resistor R34 and the anode of the zener diode DZ4 are connected with the negative output end N of the rectifying output loop; one end of a resistor R35 and the cathode of the zener diode DZ5 are connected with the emitter of the output end of the optocoupler D5 and are connected with the grid electrode of the Q5, and the other end of the resistor R35 and the anode of the zener diode DZ5 are connected with the input end c of the rectifying circuit; one end of a resistor R36 and the cathode of the zener diode DZ6 are connected with the emitter of the output end of the optocoupler D6 and are connected with the grid electrode of the Q6, and the other end of the resistor R36 and the anode of the zener diode DZ6 are connected with the negative output end N of the rectifying output loop;
the alternating current power supply is 220V, after passing through a transformer T, the alternating current power supply is respectively connected with the cathodes of diodes of the optocouplers D4, D6 and D2 and the anodes of diodes of the optocouplers D1, D3 and D5, the network test of the three-phase synchronous rectification circuit is connected with a three-phase synchronous transformer M, and the output end of the three-phase synchronous transformer M is respectively connected with the collectors of triodes of the optocouplers D4, D6, D2, D1, D3 and D5 through a resistor R24, a resistor R26, a resistor R22, a resistor R21, a resistor R23 and a resistor R25;
the three-phase synchronous rectification circuit is connected in a three-phase bridge rectification circuit mode, the input end of the three-phase synchronous rectification circuit is connected with a low-voltage coil of the transformer T, and the output end of the transformer T is used as the output end of the three-phase synchronous transformer M;
the anode of the diode at the input end of the optocoupler D1, the cathode of the diode at the input end of the D4 are connected with the source electrode of the MOS tube Q1 and the drain electrode of the MOS tube Q4, the anode of the diode at the input end of the optocoupler D3, the cathode of the diode at the input end of the D6 are connected with the source electrode of the MOS tube Q3 and the drain electrode of the MOS tube Q6, the anode of the diode at the input end of the optocoupler D5 and the cathode of the diode at the input end of the D2 are connected with the source electrode of the MOS tube Q5 and the drain electrode of the MOS tube Q2, and the cathodes of the diodes at the input ends of the optocouplers D1, D3 and D5 are connected with the anodes of the diodes at the input ends of the optocouplers D2, D4 and D6 through resistors R40; an emitter of an output end of the optocoupler D1 is connected with a grid electrode of the MOS tube Q1, an emitter of an output end of the optocoupler D2 is connected with a grid electrode of the MOS tube Q2, an emitter of an output end of the optocoupler D3 is connected with a grid electrode of the MOS tube Q3, an emitter of an output end of the optocoupler D4 is connected with a grid electrode of the MOS tube Q4, an emitter of an output end of the optocoupler D5 is connected with a grid electrode of the MOS tube Q5, and an emitter of an output end of the optocoupler D6 is connected with a grid electrode of the MOS tube Q61; the grid electrodes of the MOS transistors Q2, Q4 and Q6 are respectively connected with the source stages of the MOS transistors Q2, Q4 and Q6 through a second voltage stabilizing element, a fourth voltage stabilizing element and a sixth voltage stabilizing element, and the source stages of the MOS transistors Q2, Q4 and Q6 are connected together; the grid electrodes of the MOS transistors Q1, Q3 and Q5 are respectively connected with the source stages of the MOS transistors Q1, Q3 and Q5 through a first voltage stabilizing element, a third voltage stabilizing element and a fifth voltage stabilizing element;
the method for realizing isolated passive self-driven optocoupler three-phase synchronous rectification of the synchronous transformer comprises the following steps:
step a, when a transformer T is connected, a three-phase synchronous rectification circuit is in a working state, MOS tubes Q1, Q3 and Q5 form an upper bridge arm, MOS tubes Q4, Q6 and Q2 form a lower bridge arm, and a low-voltage coil end of the transformer T generates three-phase alternating current and sends the three-phase alternating current to the three-phase synchronous rectification circuit;
step b, according to the characteristics of three-phase alternating current, only two optocouplers are conducted at the same time, when the a-phase voltage is maximum and the b-phase voltage is minimum at a certain time of the three-phase alternating current, the secondary winding mode of a synchronous transformer is utilized to ensure that output induction potentials of V1 and V6 enable triode collectors of D1 and D6 to reliably supply power to work, meanwhile, current flows into an anode of a diode at the input end of the optocoupler D1 from the point a, flows out from a cathode of the diode at the input end of the optocoupler D1, and at the moment, the diode of the optocoupler D1 is conducted;
step c, simultaneously, the collector of the triode of the optocoupler D1 enables the optocoupler D1 to be conducted under the excitation of a V1 power supply, a G1 gate trigger signal is generated, then the MOS transistor Q1 is triggered and conducted, current flows into the anode of the diode at the input end of the optocoupler D6 through the resistor R40 and flows out of the cathode of the diode at the input end of the optocoupler D6, and the collector of the triode of the optocoupler D6 enables the optocoupler D6 to be conducted under the excitation of the V6 power supply, a G6 gate trigger signal is generated, and then the MOS transistor Q6 is triggered and conducted;
and d, conducting the MOS transistors Q1 and Q6 simultaneously to form a current loop for supplying power to the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810712041.1A CN108599601B (en) | 2018-07-02 | 2018-07-02 | Synchronous transformer-implemented isolated passive self-driven optocoupler three-phase synchronous rectification circuit and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810712041.1A CN108599601B (en) | 2018-07-02 | 2018-07-02 | Synchronous transformer-implemented isolated passive self-driven optocoupler three-phase synchronous rectification circuit and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108599601A CN108599601A (en) | 2018-09-28 |
| CN108599601B true CN108599601B (en) | 2023-11-14 |
Family
ID=63634899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810712041.1A Active CN108599601B (en) | 2018-07-02 | 2018-07-02 | Synchronous transformer-implemented isolated passive self-driven optocoupler three-phase synchronous rectification circuit and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108599601B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426927B (en) * | 2018-12-24 | 2022-06-21 | 东南大学 | Dynamic electrical stress applying device and testing method for power semiconductor device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651173A (en) * | 2005-03-03 | 2005-08-10 | 上海交通大学 | Digital flip flop of three phase full bridge controllable silicon welding power source main loop |
| CN103746577A (en) * | 2013-05-10 | 2014-04-23 | 东风汽车电气有限公司 | Low-rectification loss type optocoupler type automobile generator synchronous rectifier |
| WO2015154558A1 (en) * | 2014-08-20 | 2015-10-15 | 中兴通讯股份有限公司 | Transient interruption trigger device for alternating-current power source |
| CN204794746U (en) * | 2015-06-10 | 2015-11-18 | 上海平野环保科技有限公司 | Active synchronous Rectifier circuit of three -phase |
| WO2015184832A1 (en) * | 2014-10-09 | 2015-12-10 | 中兴通讯股份有限公司 | Alternating current detection circuit |
| CN105305831A (en) * | 2015-10-12 | 2016-02-03 | 东南大学 | Bridge type converter single-path signal gate driving circuit using isolation transformer |
| CN206060542U (en) * | 2016-09-21 | 2017-03-29 | 湖南信息职业技术学院 | He controls formula light-coupled isolation self-powered times flow pattern synchronous rectified power |
-
2018
- 2018-07-02 CN CN201810712041.1A patent/CN108599601B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651173A (en) * | 2005-03-03 | 2005-08-10 | 上海交通大学 | Digital flip flop of three phase full bridge controllable silicon welding power source main loop |
| CN103746577A (en) * | 2013-05-10 | 2014-04-23 | 东风汽车电气有限公司 | Low-rectification loss type optocoupler type automobile generator synchronous rectifier |
| WO2015154558A1 (en) * | 2014-08-20 | 2015-10-15 | 中兴通讯股份有限公司 | Transient interruption trigger device for alternating-current power source |
| WO2015184832A1 (en) * | 2014-10-09 | 2015-12-10 | 中兴通讯股份有限公司 | Alternating current detection circuit |
| CN204794746U (en) * | 2015-06-10 | 2015-11-18 | 上海平野环保科技有限公司 | Active synchronous Rectifier circuit of three -phase |
| CN105305831A (en) * | 2015-10-12 | 2016-02-03 | 东南大学 | Bridge type converter single-path signal gate driving circuit using isolation transformer |
| CN206060542U (en) * | 2016-09-21 | 2017-03-29 | 湖南信息职业技术学院 | He controls formula light-coupled isolation self-powered times flow pattern synchronous rectified power |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108599601A (en) | 2018-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107086770B (en) | PFC circuit and variable frequency air conditioner | |
| CN110011520A (en) | The constant-current drive circuit of thyristor in a kind of rectified three-phase circuit | |
| CN109347311A (en) | A kind of self-powered driving circuit of double tube positive exciting circuit of synchronous rectification | |
| CN108365765A (en) | A kind of multiple-channel output single-end flyback switching power supply | |
| CN104617794A (en) | Switch power supply and rectifying circuit | |
| CN107104589A (en) | Pfc circuit and transducer air conditioning | |
| CN1874133A (en) | Full wave bridge type circuit of synchronous rectification | |
| WO2017125055A1 (en) | Hybrid switch | |
| TWI815183B (en) | High switching frequency direct ac to ac converter and direct ac to ac converting method | |
| CN108599601B (en) | Synchronous transformer-implemented isolated passive self-driven optocoupler three-phase synchronous rectification circuit and method thereof | |
| CN204794746U (en) | Active synchronous Rectifier circuit of three -phase | |
| CN207304400U (en) | A kind of driving power | |
| CN104852611A (en) | Switching power supply | |
| CN106487249A (en) | A kind of high-gain non-bridge PFC changer for low-voltage, high-current occasion | |
| CN108540026B (en) | Silicon carbide/gallium nitride MOSFET-based permanent magnet synchronous motor drive control real-time voltage regulating circuit | |
| WO2022179564A1 (en) | Bridgeless voltage-drop power factor correction circuit | |
| CN209709931U (en) | The constant-current drive circuit of thyristor in a kind of rectified three-phase circuit | |
| CN107994779A (en) | A kind of push-pull type switch power supply topological structure | |
| CN210273839U (en) | Primary side driving secondary side synchronous rectifier tube circuit | |
| CN208353236U (en) | Synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit | |
| CN208015701U (en) | A kind of IGBT isolation control driving circuit | |
| CN207251480U (en) | Adaptive synchronous commutating circuit based on phase-shifting full-bridge ZVS | |
| CN206759767U (en) | A kind of LED drive circuit | |
| CN214959324U (en) | On-line power supply system for outdoor power monitoring | |
| CN204231223U (en) | The power supply device of three-phase half-bridge isolation drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |