CN209105058U - A kind of isolation type bidirectional ac-dc conversion circuit - Google Patents
A kind of isolation type bidirectional ac-dc conversion circuit Download PDFInfo
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- CN209105058U CN209105058U CN201821785937.4U CN201821785937U CN209105058U CN 209105058 U CN209105058 U CN 209105058U CN 201821785937 U CN201821785937 U CN 201821785937U CN 209105058 U CN209105058 U CN 209105058U
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- 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
The utility model discloses a kind of isolation type bidirectional ac-dc conversion circuit, which includes input filter, input transformer, AC rectification unit, energy storage filter unit, DC-dc conversion unit, output energy-storage units.The circuit of the utility model perhaps can make the circuit work in different mode the judgement of external other voltages, current signal according to external communication order -- rectification and inversion or standby three kinds of operating modes；The common mode current for exchanging side can effectively be inhibited while input transformer can realize the inversion of this circuit or energy-storage function under rectification mode simultaneously again and exchange anti-bias detection function, and AC rectification unit common mode interference over the ground is effectively reduced.
Description
Technical field
The utility model relates to Switching Power Supply more particularly to a kind of isolation type bidirectional ac-dc conversion circuits.
Background technique
Nowadays the inverter of energy-storage system, hybrid power supply are from gird-connected inverter, lithium battery factory forming and capacity dividing, aging inspection
The links such as survey, are all the applications for needing to carry out alternating current-direct current two-way changing (having rectification and inverter mode), wherein especially
Detection device, required precision are higher；It is traditional mostly with high-frequency inverter because low-frequency transformer isolation technology relative maturity is stablized
Based on the scheme for cooperating low frequency isolation transformer, thus it is bulky, it is poor in lower-powered field cost performance；Later or with
Rectification and two sets of circuits of inversion are realized, but cost performance or poor, the high frequency traced it to its cause mainly with same main circuit
Two-way changing technology is isolated and realizes that difficulty is larger, especially it is limited to be difficult to meet demand use for the biggish application scenarios of power.
Utility model content
The main purpose of the utility model is that propose a kind of isolation type bidirectional ac-dc conversion circuit, it is existing to solve
Alternating current-direct current two-way changing complex circuit designs are difficult to realize high-frequency isolation and ineffective technical problem.
The utility model provides a kind of isolation type bidirectional ac-dc conversion circuit, including input filter, input transformer,
AC rectification unit, DC-dc conversion unit, energy storage filter unit, output energy-storage units；
The input terminal of the input filter accesses AC signal, and the output end of the input filter and the input become
Two different name ends of depressor connect, other two different name end of the input transformer and the input terminal of the AC rectification unit
Connection, the output end of the output end of the AC rectification unit are connect with the input terminal of the energy storage filter unit, the energy storage
The output end of filter unit is connect with the input terminal of the DC-dc conversion unit, the DC-dc conversion unit it is defeated
Outlet is connect with the input terminal of the output energy-storage units, and the output end of the output energy-storage units accesses direct current signal.
Preferably, the DC-dc conversion unit can be worked together using multiple parallel connections.
Preferably, the high frequency conversion unit can be semi-bridge alternation circuit, be also possible to full-bridge circuit.
Preferably, the DC side rectification unit can be full-wave rectifying circuit, be also possible to full bridge rectifier, can also
To be voltage doubling rectifing circuit, if it is full-wave rectifying circuit, then there are two windings for the isolating transformer being attached thereto, if it is complete
Bridge or voltage doubling rectifing circuit, the then isolating transformer being attached thereto have a winding.
Preferably, the AC rectification unit, the semiconductor equalizing in high frequency conversion unit, DC side rectification unit are switches
Pipe, and be can high-frequency driving signal control open semiconductor devices with shutdown, such as metal-oxide-semiconductor or IGBT pipe.Switching tube is instead simultaneously
Diode can be integrated or parasitic diode, be also possible to additional independent diode.
Preferably, if the DC side rectification unit is using full-wave rectifying circuit, the switching tube of two-way uses source electrode
It is connected, drain electrode connects the mode of transformer coil respectively.
Above-mentioned isolation type bidirectional ac-dc conversion circuit provided by the utility model, the beneficial effect being compared with the prior art
Include:
It, can again can be effective while realizing the energy-storage function under inversion or rectification mode using input transformer
Inhibit the common mode current and the anti-bias function of exchange of exchange side, and AC rectification unit common mode interference over the ground is effectively reduced；High frequency
The no-voltage of converter unit or DC side rectification unit is opened or zero voltage turn-off mode can realize that soft switch two-way converts,
Reduce each element in transformation loop opens and turns off stress, reduces switching loss；Facilitate the work frequency of inverter circuit
Rate improves or efficiency improves to improve power density and reduces volume.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of isolation type bidirectional ac-dc conversion circuit provided by the embodiment of the utility model；
Fig. 2 is the schematic diagram of another isolation type bidirectional ac-dc conversion circuit provided by the embodiment of the utility model；
Fig. 3 is the schematic diagram of another isolation type bidirectional ac-dc conversion circuit provided by the embodiment of the utility model；
Fig. 4 is the schematic diagram of another isolation type bidirectional ac-dc conversion circuit provided by the embodiment of the utility model；
Fig. 5 is the schematic diagram of another isolation type bidirectional ac-dc conversion circuit provided by the embodiment of the utility model；
Fig. 6 is the PWM drive mode one when the translation circuit of Fig. 1 works in rectification mode；
Fig. 7 is the PWM drive mode two when the translation circuit of Fig. 1 works in rectification mode；
Fig. 8 is the PWM drive mode one when the translation circuit of Fig. 1 works in inverter mode；
Fig. 9 is the PWM drive mode two when the translation circuit of Fig. 1 works in inverter mode.
Specific embodiment
The utility model is described in further detail with specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of isolation type bidirectional ac-dc conversion circuit provided by the embodiment of the utility model, including input
Filter 100, input transformer 200, AC rectification unit 300, energy storage filter unit 400, DC-dc conversion unit 500,
Export energy-storage units 600；
The input terminal of input filter 100 accesses AC signal, the output end and input transformer of input filter 100
200 two different name ends connection, other two different name end of input transformer 200 and the input terminal of AC rectification unit 300 connect
It connects, the output end of the output end of AC rectification unit 300 is connect with the input terminal of energy storage filter unit 400, energy storage filter unit
400 output end is connect with the input terminal of DC-dc conversion unit 500, the output end of DC-dc conversion unit 500 with
The input terminal connection of energy-storage units 600 is exported, the output end of output energy-storage units 600 accesses direct current signal.
DC-dc conversion unit 500 includes high frequency conversion unit 510, isolating transformer 520, DC side rectification unit
530；The input terminal of high frequency conversion unit 510 is connect with the output end of energy storage filter unit 400, high frequency conversion unit 510 it is defeated
Outlet is connect with the both ends of the first siding ring of isolating transformer 520, one end of the second siding ring of isolating transformer 520 and straight
Flow the input terminal connection of side rectification unit 530, the input of the output end and output energy-storage units 600 of DC side rectification unit 530
The other end of end connection, the second siding ring of isolating transformer 520 is connect with the output end of output energy-storage units 600.
Specific connection type is as follows: as shown in Figure 1, the alternating current source V1 of the input terminal of input filter and input exchange signal
It is connected, output end is connected with the port of two coils of input transformer T1 respectively, and the port of two coils is input transformation
The different name end of device, (i.e. two coils in two polarity of alternating current source, constitute series aiding connection relationship respectively in the loop.) input
The other port of two coils of transformer is connected with two input terminals of AC rectification unit respectively.The T1 of circuit is that have one
The transformer for determining sensibility reciprocal can be and be provided with air gap in the magnetic loop of transformer, in inversion or rectification mode, except can mention
Outside for energy-storage function, the DC component detection signal function for exchanging covert or big small echo can also be provided after adding ancillary coil
Energy.
AC rectification unit includes switching tube Q5-Q8, and switching tube Q5 is connected with the source electrode of switching tube Q6, switching tube Q7 with open
The drain electrode for closing pipe Q8 is connected, and the drain electrode of switching tube Q5 is defeated as one of AC rectification unit after being connected with the source electrode of switching tube Q7
Enter end；Another input terminal as AC rectification unit after the drain electrode of switching tube Q6 is connected with the source electrode of switching tube Q8.
Energy storage filter unit includes to capacitor C1a-C4a, and C1a, C2a are electrolytic capacitor or equivalent capacity, C3a, C4a
High-frequency pole-free capacitor or equivalent capacity, the anode of capacitor C1a, one end of capacitor C3a, switching tube Q5 and switching tube Q6 source
Extremely it is connected, the cathode of capacitor C1a is connect with the anode of capacitor C2a, and the other end of capacitor C3a is connect with one end of capacitor C4a, electricity
Hold the cathode of C2a, the other end of capacitor C4a, switching tube Q7 to be connected with the drain electrode of switching tube Q8.
High frequency conversion unit includes inductance L1a, switching tube Q3A and switching tube Q4A；The source electrode and capacitor C1a of switching tube Q3A
Anode be connected, the drain electrode of switching tube Q4A is connected with the negative terminal of capacitor C2a, the source of the drain electrode of switching tube Q3A and switching tube Q4A
Pole is connected with one end of inductance, and the other end of inductance is connected with one end of the first siding ring of isolating transformer Tra, and transformation is isolated
The other end of the first siding ring of device is connected with the series connection midpoint of capacitor C1a and capacitor C2a.
DC side rectification unit include the 11st switching tube Q1A and the 12nd switching tube Q2A, the 11st switching tube Q1A and
The drain electrode of 12nd switching tube Q2A is connected with two different name ends of two coils of the secondary side of isolating transformer respectively, and the tenth
The source electrode of one switching tube Q1A and the 12nd switching tube Q2A is connected and the output end as DC side rectification unit.
It is the other embodiments of the present embodiment one respectively shown in Fig. 5 such as Fig. 2, Fig. 3, Fig. 4, is by 2 shown in diagram 2
A (can also be greater than 2, be denoted as N number of) DC-DC unit carries out in parallel；Compared to aforementioned, when control, each unit
Misphase 2 (or 1/N) a switch periods may also reach up the benefit of stagger parallel connection in addition to it can increase power respectively, thus
Can make the high frequency ripple current of circuit reduces, and reduces the high-frequency loss of circuit loss, especially storage capacitor.Certainly, may be used
To be that DC terminal using multiple DC-DC units in exchange side is connected together, DC output end parallel operation together can also
To be in parallel together, the DC output end tandem working together in the DC terminal for exchanging side using multiple DC-DC units.
First case study on implementation shown in Fig. 3 is to have DC rectifier unit full-wave circuit to be changed to full-bridge electricity compared to case study on implementation
Road, it is more advantageous compared to full-wave circuit when output HIGH voltage.Specific connection type is as follows: DC side rectification unit
Comprising switching tube Q1A, Q2A, Q9A, Q10A, switching tube Q1A is connected with the source electrode of switching tube Q2A, switching tube Q9A and switching tube
The drain electrode of Q10A is connected, the drain electrode of switching tube Q1A and the source electrode of switching tube Q9A and isolating transformer TraSecond siding ring one
End is connected, the source electrode and isolating transformer T of the drain electrode of switching tube Q2A and switching tube Q10AraSecond siding ring other end phase
Even.
First case study on implementation shown in Fig. 4 is that the circuit of high frequency conversion unit is become full-bridge circuit compared to case study on implementation, can
With the occasion for being preferably suitble to power slightly larger；Specific connection type is as follows: high frequency conversion unit includes inductance L1a and switching tube
Q3A, Q4A, Q5A and Q6A；The source electrode of switching tube Q5A and switching tube Q3A are connected with the anode of capacitor C1, switching tube Q6A and switch
The source electrode of pipe Q4A is connected with the cathode of capacitor C1, the drain electrode of switching tube Q5A and the source electrode of switching tube Q6A and isolating transformer
One end of first siding ring is connected, and the drain electrode of switching tube Q3A and the source electrode of switching tube Q4A are connected with one end of inductance L1a, inductance
The other end of the first siding ring of the other end and isolating transformer of L1a is connected.
Case study on implementation shown in Fig. 5 compared to case study on implementation be first the circuit that rectifies high frequency conversion unit and DC side all
Become full-bridge circuit, therefore circuit is more suitable more high-power and DC side high voltage.Specific connection type is same as above, no longer
It repeats.
Case exception more than removing, it is also voltage doubling rectifing circuit that DC side rectification circuit, which is seen also, can be such as previously formed different
Combination, can also circuit carry out parallel connection as shown in Figure 2.But what aforementioned transformation or combination no matter are done, exchanges side in cooperation
After line related, while the driving under one control strategy of case can also be applied, and reach relevant effect.
The control method of above-mentioned isolation type bidirectional ac-dc conversion circuit includes:
When circuit works in rectification mode, control AC rectification unit rectifies the signal of input；Control high frequency
Converter unit carries out high frequency conversion to the signal through over commutation；When the electricity of the direct current signal of the output end access of output energy-storage units
When stream is equal to or more than pre-set value, DC rectifier unit is made to be in synchronous rectification state；
When circuit works in inverter mode, control DC rectifier unit accesses the output end of output energy-storage units straight
Stream signal is rectified, while being controlled AC rectification cell operation in alternating current-direct current inversion off-network pressure stabilizing state or being carried out grid-connected lock
Phase feedback；When the electric current for exporting the direct current signal of output end access of energy-storage units is equal to or more than pre-set value, make high frequency
Converter unit is in synchronous rectification state；
When told circuit works in standby mode, driving signal is not applied to circuit, waits rectification mode or inversion
The conversion of mode.
Further description is carried out to above-mentioned control method by taking the circuit of embodiment one as an example below:
After detecting external communication signal or voltage and current signal, judgement meets operating condition and then starts work, and false
If working in rectification mode according to the mode judged, since input transformer has certain sensibility reciprocal, in other words in transformation
Air gap is provided in the magnetic loop of device, therefore in inversion or rectification mode, control AC rectification unit (Q5~Q8) works in
When alternating current-direct current rectification state, which connects since two coils can be equivalent to Same Name of Ends in the connection type of circuit,
It can exercise energy-storage function, make current waveform floating voltage waveform due to can control opening for AC rectification unit,
Power-factor correction function may be implemented, and AC-input voltage is transformed to a stationary value.Make DC-dc conversion simultaneously
Circuit works in direct current output transition state, the i.e. Q3A to high frequency conversion circuit, and Q4A switching tube applies driving signal and carries out height
Frequency converts, and coupling of the DC voltage of primary side Jing Guo high-frequency isolation transformer is transmitted to primary side, if the load of DC output side
Or the electric current of equivalent load is equal to or more than pre-set value, as shown in fig. 6, the switching tube of the DC rectifier unit to outlet side
Q1A, Q2A apply driving signal and constitute synchronous rectification.The working frequency and duty ratio of high frequency conversion unit can be big according to load
Small and output voltage feedback is adjusted, and load is bigger, then frequency is lower, and duty ratio is bigger.
Wherein the no-voltage about high frequency conversion unit Q3A, Q4A is realized, it is assumed that after applying driving signal to Q3A, electric current
There is Q3A to flow through L1a, transformer coil, then reach the anode (cathode of C1a and C3a) of C2a and C4a, therefore constitutes electric current and return
Road, due to the presence of L1a, necessarily constitutes series connection partial pressure energy storage (or series boosting releases energy) in the course of work,
Therefore, after Q3A is closed, due to the presence of the equivalent output capacitance of Q3A and Q4A, which can charge (or electric discharge),
If the capacitor is enough, the effect of zero voltage turn-off is then obvious；L1a necessarily constitutes afterflow simultaneously, in the equivalent output electricity of Q4A
After discharge capacitor, it is anti-and parasitic diode can then be forward biased and be connected naturally, if do not had in the freewheel current
Before having reversely, Q4A is opened, then it is open-minded to realize Zero-voltage soft.Corresponding Q4A shutdown, it is also such as that the Zero-voltage soft of Q3A, which opens principle,
This；It, can be because the difference loaded, time of afterflow be different, it is therefore necessary to which attention opens duty ratio in frequency in the course of work
The cooperation of rate variation is to reach the Sofe Switch effect for doing wide working range.Other basic working principles belong to well-known technique just not
Narration in detail, below it is main with regard to control strategy analyzed.
The synchronized signal of DC side rectification unit is then with the driving letter of primary side high frequency conversion switch (corresponding Same Name of Ends)
Number end point (or closing point) is that reference data, such as Fig. 6, such as Q1A correspond to Q4A, is later than the driving signal being maintained at and opens
Under conditions of opening (delay time is denoted as Tdon1) again after logical and terminate prior to reference data (pre-set time is denoted as Tdoff1) into
The setting of row duty ratio.When the synchronized signal frequency of DC side rectification unit direction change from high to low, high frequency conversion list
The working frequency and duty ratio of member can be adjusted according to the feedback of payload size and output voltage, and load is bigger, then duty
Than bigger, frequency is lower, meanwhile, the synchronized signal of DC side rectification unit is then of the same name with primary side high frequency conversion switch correspondence
The driving signal end point (or close point) at end is reference data, be maintained at be later than it is open-minded again after the driving signal is opened
(delay time is denoted as Tdon1), and (time is denoted as Tdoff1) carries out under conditions of terminating prior to (or being later than) reference data
Duty ratio setting.
If as shown in fig. 6, DC side rectification unit only synchronous rectification, driving signal frequency from high-frequency to
When low-frequency direction change, then it can gradually become larger prior to the time Tdoff1 of closing, while Tdon1 is remained unchanged or meeting
Reduce, it is overall relative to come at the trend of moving to left；As shown in fig. 7, driving signal frequency is by low frequency when if necessary to buck functionality
When to high-frequency direction change, then it can gradually be moved to right prior to the time Tdoff1 of closing, that is, be later than reference signal closing, together
When Tdon1 can expand, it is overall relative to come at the trend of moving to right；
Assuming that when judging that translation circuit works in inverter mode: controlling the DC-DC transfer circuit and work in direct current
Input transformation state gives Q1A, and Q2A applies driving signal, by the coupling of high-frequency isolation transformer, by the voltage coupling of DC side
Primary side side is closed, then through Q3A, Q4A rectification is output to DC bus；Controlling AC rectification unit (Q5~Q8) works in friendship simultaneously
DC inversion off-network pressure stabilizing state carries out grid-connected locking phase feedback；If the electric current of the DC output side is equal to or more than default
Definite value then applies driving signal to the switching tube Q3A, Q4A of the high frequency conversion unit of DC rectifier unit and constitutes synchronous rectification.Directly
The working frequency and duty ratio for flowing side rectification unit can exchange side DC bus-bar voltage and electric current according to DC side input voltage
Equal signals feedback is adjusted, and load is bigger, then duty ratio is bigger；Or frequency increases；Or open high frequency conversion unit
Switching tube, using the switching tube of high frequency conversion unit, the closed loop current inductance that L1a and transformer coil are formed in short-term is stored up
Can, as shown in figure 8, the control driving signal of the switching tube of high frequency conversion unit is then with the driving of DC side rectification unit switching tube
Signal end point (or close point) is reference data, and holding is later than after the driving signal is opened opens that (delay time is denoted as again
Tdon2 it) and is later than reference data and terminates to carry out duty ratio setting under conditions of (delay time is denoted as Tdoff2).It is switched when determining
When frequency works, the switching tube Q3A, Q4A of high frequency conversion unit can be opened relative to DC side rectification unit (corresponding Same Name of Ends)
Q1A, Q2A switching tube do synchronous rectification；As shown in figure 9, when needing to boost, the switching tube Q3A of high frequency conversion unit,
Q4A is opened relative to DC side rectification unit (corresponding Same Name of Ends) Q1A, and opening for Q2A switching tube can move back；Then Tdon2 is longer,
Tdoff2 is also opposite to become larger, then boost capability is bigger；
In addition, in two input lines (or output line) of exchange side either under rectification mode perhaps inverter mode
On when having common mode current, due to the presence of transformer T1 in circuit, two transformer coils being connected in two lines constitute same
It is Same Name of Ends series connection to series connection, therefore common mode current can generate opposite voltage sense on two transformer coils of transformer T1
It answers, prevents it from continuing to propagate the signal absorption from the short-circuit low-resistance antiatherosclerotic effect that will form equivalent.Therefore, the transformer is except can
To realize energy-storage function in power conversion, it can also effectively inhibit common mode current and over the ground common mode interference.In addition addition auxiliary
It after coil, will analyze after the signal acquisition, can analyze out according to the rectified voltage height for exchanging positive and negative half-wave signa
Exchange phase partially or the DC component for detecting big small echo.
The same radiator can be used without isolation and can use scattered in addition, switching tube Q1A and Q2A is connected with source electrode
Hot device does the conductive transmission circuit of source electrode；Or using knockdown heat dissipation, such as traditional we be with Aluminium Radiator,
The thermally conductive uniformity is poor, can use copper aluminium composite type, i.e., add copper material between Aluminium Radiator and switching tube
So that conducting impedance is low, and the heat dissipation of switching tube can be made uniform.It even is processed as pin using copper material in printed circuit board,
Solderable or fixed process need not be in addition added on aluminium again, the program can achieve many things at one stroke.Certainly, Q1A and Q2A
It can be conventional same drain electrode connection type, i.e. the source electrode of the two is connect respectively on two coils of transformer.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For those skilled in the art of the present invention
For, without departing from the concept of the premise utility, several equivalent substitute or obvious modifications, and performance can also be made
Or purposes is identical, all shall be regarded as belonging to the protection scope of the utility model.
Claims (11)
1. a kind of isolation type bidirectional ac-dc conversion circuit, which is characterized in that including input filter, input transformer, exchange
Rectification unit, DC-dc conversion unit, energy storage filter unit, output energy-storage units；
The input terminal of the input filter accesses AC signal, the output end of the input filter and the input transformer
The connection of two different name ends, the input terminal of other two different name end of the input transformer and the AC rectification unit connects
It connects, the output end of the output end of the AC rectification unit is connect with the input terminal of the energy storage filter unit, the energy storage filter
The output end of wave unit is connect with the input terminal of the DC-dc conversion unit, the output of the DC-dc conversion unit
It holds and is connect with the input terminal of the output energy-storage units, the output end of the output energy-storage units accesses direct current signal.
2. isolation type bidirectional ac-dc conversion circuit as described in claim 1, which is characterized in that the DC-dc conversion
Unit includes high frequency conversion unit, isolating transformer, DC side rectification unit；The input terminal of the high frequency conversion unit with it is described
The output end of energy storage filter unit connects, the output end of the high frequency conversion unit and the first siding ring of the isolating transformer
Both ends connection, one end of the second siding ring of the isolating transformer connect with the input terminal of the DC side rectification unit,
The output end of the DC side rectification unit with it is described output energy-storage units input terminal connect, the isolating transformer it is secondary
The other end of lateral coil is connect with the output end of the output energy-storage units.
3. isolation type bidirectional ac-dc conversion circuit as claimed in claim 2, which is characterized in that the AC rectification unit packet
First to fourth switching tube is included, the first switch tube is connected with the source electrode of second switch, the third switching tube and the 4th
The drain electrode of switching tube is connected, and the drain electrode of the first switch tube is used as the AC rectification after being connected with the source electrode of third switching tube
One input terminal of unit；The drain electrode of the second switch is used as the AC rectification after being connected with the source electrode of the 4th switching tube
Another input terminal of unit.
4. isolation type bidirectional ac-dc conversion circuit as claimed in claim 3, which is characterized in that the energy storage filter unit packet
Include first to fourth capacitor, the anode of the first capacitor, one end of third capacitor, the first switch tube and second switch
Source electrode be connected, the anode of the cathode of the first capacitor and second capacitor is connect, the other end of the third capacitor and
One end of 4th capacitor connects, the cathode of second capacitor, the other end of the 4th capacitor, the third switching tube
It is connected with the drain electrode of the 4th switching tube.
5. isolation type bidirectional ac-dc conversion circuit as claimed in claim 4, which is characterized in that the high frequency conversion unit packet
Containing the first inductance, the 5th switching tube and the 6th switching tube；The source electrode and the positive phase of the first capacitor of 5th switching tube
Even, the drain electrode of the 6th switching tube is connected with the negative terminal of second capacitor, the drain electrode of the 5th switching tube and described the
The source electrode of six switching tubes is connected with one end of first inductance, the other end and the isolating transformer of first inductance
One end of first siding ring is connected, the other end of the first siding ring of the isolating transformer and the first capacitor and the second electricity
The series connection midpoint of appearance is connected.
6. isolation type bidirectional ac-dc conversion circuit as claimed in claim 3, which is characterized in that the energy storage filter unit packet
The 5th capacitor is included, the anode of the 5th capacitor is connected with the source electrode of the first switch tube and second switch, and the described 5th
The cathode of capacitor is connected with the drain electrode of the third switching tube and the 4th switching tube.
7. isolation type bidirectional ac-dc conversion circuit as claimed in claim 6, which is characterized in that the high frequency conversion unit packet
Containing the second inductance and the 7th to the tenth switching tube；The source electrode of 7th switching tube and the 8th switching tube and the 5th capacitor
Anode is connected, and the source electrode of the 9th switching tube and the tenth switching tube is connected with the cathode of the 5th capacitor, and the described 7th opens
The drain electrode and the source electrode of the 9th switching tube for closing pipe are connected with one end of the first siding ring of the isolating transformer, and described the
The drain electrode of eight switching tubes and the source electrode of the tenth switching tube are connected with one end of second inductance, second inductance it is another
One end is connected with the other end of the first siding ring of the isolating transformer.
8. isolation type bidirectional ac-dc conversion circuit as described in claim 5 or 7, which is characterized in that the DC side rectification
Unit include the 11st switching tube and the 12nd switching tube, the drain electrode of the 11st switching tube and the 12nd switching tube respectively with
Two different name ends of two coils of the secondary side of the isolating transformer are connected, the 11st switching tube and the 12nd switch
The source electrode of pipe is connected and the output end as the DC side rectification unit.
9. isolation type bidirectional ac-dc conversion circuit as described in claim 5 or 7, which is characterized in that the DC side rectification
Unit includes the 13rd to close and manage to sixteenmo, and the source electrode of the 13rd switching tube and the 14th switching tube is connected, and described the
The drain electrode that 15 switching tubes and sixteenmo close pipe is connected, the drain electrode of the 13rd switching tube and the source electrode of the 15th switching tube and
One end of the second siding ring of the isolating transformer is connected, the source of the drain electrode of the 14th switching tube and sixteenmo pass pipe
Pole is connected with the other end of the second siding ring of the isolating transformer.
10. isolation type bidirectional ac-dc conversion circuit as described in claim 1, which is characterized in that the output energy-storage units
Including the 6th capacitor, the both ends of the 6th capacitor respectively with the input terminal and output end phase of the DC-dc conversion unit
Even.
11. isolation type bidirectional ac-dc conversion circuit as described in claim 1, which is characterized in that including multiple direct currents-
DC converting unit, the connection of the multiple DC-dc conversion unit is using one of following three kinds of modes: the multiple straight
Stream-DC converting unit parallel connection or the input terminal series connection of the multiple DC-DC unit, output end are in parallel or described
The input terminal of multiple DC-DC units is in parallel, output end series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785937.4U CN209105058U (en) | 2018-10-31 | 2018-10-31 | A kind of isolation type bidirectional ac-dc conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785937.4U CN209105058U (en) | 2018-10-31 | 2018-10-31 | A kind of isolation type bidirectional ac-dc conversion circuit |
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| CN209105058U true CN209105058U (en) | 2019-07-12 |
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| CN201821785937.4U Active CN209105058U (en) | 2018-10-31 | 2018-10-31 | A kind of isolation type bidirectional ac-dc conversion circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039139A (en) * | 2018-10-31 | 2018-12-18 | 深圳市高益智能电气有限公司 | A kind of isolation type bidirectional ac-dc conversion circuit and its control method |
| CN109039139B (en) * | 2018-10-31 | 2024-05-10 | 南京熊猫电子股份有限公司 | Isolated bidirectional AC/DC conversion circuit and control method thereof |
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2018
- 2018-10-31 CN CN201821785937.4U patent/CN209105058U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039139A (en) * | 2018-10-31 | 2018-12-18 | 深圳市高益智能电气有限公司 | A kind of isolation type bidirectional ac-dc conversion circuit and its control method |
| CN109039139B (en) * | 2018-10-31 | 2024-05-10 | 南京熊猫电子股份有限公司 | Isolated bidirectional AC/DC conversion circuit and control method thereof |
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