CN110233579A - A kind of parallel connection rectification topology and a kind of LLC resonance circuit - Google Patents
A kind of parallel connection rectification topology and a kind of LLC resonance circuit Download PDFInfo
- Publication number
- CN110233579A CN110233579A CN201910435369.8A CN201910435369A CN110233579A CN 110233579 A CN110233579 A CN 110233579A CN 201910435369 A CN201910435369 A CN 201910435369A CN 110233579 A CN110233579 A CN 110233579A
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- Prior art keywords
- rectification
- circuit
- parallel
- transformer
- rectification circuit
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—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
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/08—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
-
- 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 invention discloses a kind of rectification topology in parallel and a kind of LLC resonance circuits.The parallel connection rectification topology includes: multiple rectification circuits, and each rectification circuit includes that a transformer and a rectifier bridge, the rectifier bridge of each rectification circuit interconnected are connected in parallel, also, two adjacent rectifier bridges share a bridge arm；The transformer of each rectification circuit works asynchronously, and by switching to synchronous push-push operation or synchronous reverse phase work, controls each rectification circuit series connection output or parallel output.The rectifier bridge of each rectification circuit is connected in parallel by the application, two adjacent rectifier bridges are made to share a bridge arm, and pass through the synchronous push-push operation of the transformer of switching rectification circuit or synchronous reverse phase work, to control each rectification circuit series connection output or parallel output, reduce device cost and power loss, and switching control is simple, does not need to interrupt charging process, the scope of application is wider.
Description
Technical field
The present invention relates to technical field of circuit design, in particular to a kind of rectification topology in parallel and a kind of LLC resonance
Circuit.
Background technique
With the appearance and development of electric car, ownership is very considerable, therefore the charging market of electric car
Become very huge, matched charging equipment is needed to be supported.Demand due to electric car to high-power charger, it is desirable that
Charging equipment can be run in wider output area, and provide as high as possible charge efficiency and reliability.Existing one
In a little charging schemes, charging circuit is constituted using LLC resonance circuit, it includes two inductance and an electricity that LLC resonance circuit, which uses,
The resonant network of appearance, to reduce switching loss and switching noise, improves power supply conversion effect with zero voltage switch conditional operation
Rate.
But be currently used in the rectification topology of LLC resonance circuit, usually using relay or diode with partly lead
The mode of body switch combination switches the series-parallel relationship of rectification circuit, there is a problem of that higher cost, power loss are larger.With reference to
Shown in Fig. 1, for a kind of existing rectification topology for cutting series-parallel relationship using relay, including two independent rectified currents
Road, upper illustration are paralleling model, and in the position NO, lower section is illustrated as series model, two relays for the contact of two relays
Contact in the position NC.But in scheme as shown in Figure 1, the use of relay will increase the device of rectification topology at
This, while power loss and heat dissipation problem can be also generated, and the contact change-over process of relay needs to stop charging, therefore meeting
Charging current is interrupted, influences charge efficiency, and its reliability is also influenced by the relay contact service life.
Summary of the invention
Bad in view of the series-parallel switching mode of prior art rectification topology, there are higher cost and power loss are larger
The problem of, a kind of rectification topology in parallel and a kind of LLC resonance circuit of the invention are proposed, to overcome the above problem.
To achieve the goals above, present invention employs following technical solutions:
According to one aspect of the present invention, a kind of rectification topology in parallel is provided, comprising: multiple rectification circuits, often
A rectification circuit includes a transformer and a rectifier bridge interconnected, and the rectifier bridge of each rectification circuit is simultaneously
Connection connection, also, two adjacent rectifier bridges share a bridge arm；The transformer of each rectification circuit works asynchronously,
And by switching to synchronous push-push operation or synchronous reverse phase work, each rectification circuit series connection output or parallel output are controlled.
Optionally, in each rectification circuit, the transformer is allowed hand over to fully synchronized push-push operation, each to control
The rectification circuit is connected output jointly.
Optionally, in each rectification circuit, the transformer is allowed hand over to alternately synchronous reverse phase work one by one, with
Control each common parallel output of the rectification circuit.
Optionally, in each rectification circuit, it is one group that the transformer, which is allowed hand over to every N number of adjacent transformer,
Transformer in every group synchronizes push-push operation, the synchronous reverse phase work of the transformer between adjacent sets, to control per N number of adjacent institute
Rectification circuit series connection is stated, and in parallel with other adjacent N number of described rectification circuits.
Optionally, parallel connection rectification topology further include: filter circuit, it is whole that the filter circuit is connected to the parallel connection
Between the output end for flowing topological structure.
Optionally, the filter circuit includes one or more filter capacitors.
Optionally, parallel connection rectification topology further include: control switching circuit, the control switching circuit connect each institute
The transformer of rectification circuit is stated, output control signal controls the transformer and switches to synchronous push-push operation or synchronous reverse phase work
Make.
Optionally, the control switching circuit includes: single-chip microcontroller and power amplification circuit, and the single-chip microcontroller passes through different I/
The O mouthfuls of multiple synchronous control signals of output, the transformer for controlling each rectification circuit is separately connected through the power amplification circuit.
Optionally, there are two the rectification circuit settings, the transformer of two rectification circuits is by switching to synchronization
Push-push operation, the rectification circuit series connection output of control two, the transformer of two rectification circuits is by switching to synchronization
Reverse phase work, controls two rectification circuit parallel outputs.
According to another aspect of the invention, a kind of LLC resonance circuit is provided, which includes such as taking up an official post
Rectification topology in parallel described in one.
In conclusion the beneficial effects of the present invention are:
The rectifier bridge of each rectification circuit is connected in parallel, so that two rectifier bridges of adjacent company is shared a bridge arm, and pass through
The transformer for switching rectification circuit synchronizes push-push operation or synchronous reverse phase work, to control each rectification circuit series connection output or parallel connection
Output, compared to the existing handover scheme for using relay or diode to combine with semiconductor switch, reduces number of devices, drops
Low cost, and power loss caused by relay or semiconductor switch device is also avoided, and switching control is simple, no
It needs to interrupt charging process.
Detailed description of the invention
Fig. 1 is the rectification topology schematic diagram that the prior art switches the series-parallel relationship of rectification circuit using relay；
Fig. 2 is a kind of schematic diagram of rectification topology in parallel provided by one embodiment of the present invention；
Fig. 3 is a kind of tool showing there are two the rectification topology in parallel of rectification circuit provided by one embodiment of the present invention
It is intended to；
Fig. 4 is in the rectification topology in parallel of embodiment illustrated in fig. 3, and current direction is illustrated when two rectification circuits are connected
Figure；
Fig. 5 is in the rectification topology in parallel of embodiment illustrated in fig. 3, and current direction is illustrated when two rectification circuit parallel connections
Figure.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for describe the application and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present application, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in application.
Technical concept of the invention is: the rectifier bridge of each rectification circuit being connected in parallel, keeps two adjacent rectifier bridges total
With a bridge arm, and by the synchronous push-push operation of the transformer of switching rectification circuit or synchronous reverse phase work, to control each rectification
Circuit series connection output or parallel output, compared to the existing switching side for using relay or diode to combine with semiconductor switch
Case reduces number of devices, reduces costs, and also avoids the damage of power caused by relay or semiconductor switch device
Consumption, and switching control is simple, does not need to interrupt charging process.
Fig. 2 shows one embodiment of the application parallel connection rectification topology, as shown in Fig. 2, the parallel connection rectification topology
Structure includes: multiple rectification circuits, and each rectification circuit includes a transformer and a rectifier bridge interconnected, each whole
The rectifier bridge of current circuit is connected in parallel, also, two adjacent rectifier bridges share bridge arm (two pole of a pair being connected in series
Pipe)；The transformer of each rectification circuit works asynchronously, and each by switching to synchronous push-push operation or synchronous reverse phase work, control
Rectification circuit series connection output or parallel output, output positive and negative terminal is respectively UoP and UoN.
It is illustrated by taking the series-parallel switching of two rectification circuits as an example, includes 2 for the application with reference to shown in Fig. 3-Fig. 5
The rectification topology embodiment in parallel of a rectification circuit, the transformer of two rectification circuits are identical as rectifier bridge connection type
(transformer Same Name of Ends is towards left side).
When the synchronous push-push operation of two transformers T1, T2, current direction is as shown in figure 4, in half cycle a, diode D2
It is connected with D3, in half cycle b, diode D1 and D4 conducting, thus two transformer T1, T2 series connection, electric current having the same, this
The voltage of two transformers T1, T2 are added as load voltage.
When the synchronous reverse phases work of two transformers T1, T2, current direction as shown in figure 5, in half cycle a, diode D1,
D3 and D6 conducting, in half cycle b, diode D2, D4 and D5 conducting have respectively independent so that two transformers T1, T2 are in parallel
Electric current and identical voltage, this identical voltage is load voltage.
Compared with the prior art shown in Fig. 1: under series model, this topological structure only has 2 PN junction power losses, and schemes
The prior art shown in 1 has 4 PN junction losses and relay power loss, also, in this topological structure, and shared two
A diode D5 and D6 is respectively subjected to the half of output voltage, thus can select the lower low pressure-resistant diode of cost；Simultaneously
Under gang mould formula, this topological structure only has 2 PN junction power losses, and the prior art shown in FIG. 1 has 4 PN junction power losses
And relay power loss.It follows that the rectification topology in parallel of the application, has less device, reduces device
Part cost and power loss, also, the application is by way of switching transformer coil phase, realize rectification circuit series connection and
Parallel connection switching, switching mode is simpler flexibly easily-controllable, does not need to interrupt charging, thus whole charge efficiency is higher.
It is similar with above-mentioned working method, when the rectification topology in parallel of the application includes greater number of rectification circuit
When, it still has the above advantages, and there is bigger output variation range, details are not described herein.
In one embodiment of the application, the transformer of each rectification circuit is allowed hand over to fully synchronized push-push operation,
It connects jointly output to control each rectification circuit；Alternatively, in one embodiment of the application, the transformer of each rectification circuit
It allows hand over to reverse phase work is alternately synchronized one by one, to control the common parallel output of each rectification circuit；Or in the application
One embodiment in, in each rectification circuit, it is one group that transformer, which is allowed hand over to every N number of adjacent transformer, is become in every group
Depressor synchronizes push-push operation, the synchronous reverse phase work of transformer between adjacent sets, to control per N number of adjacent rectification circuit series connection,
And it is in parallel with other adjacent N number of rectification circuits.
To which the application can realize the flexible series-parallel combination of multiple rectification circuits, and switching mode is simple and convenient, defeated
The range of power supply is wider out, and the scope of application is more extensive.
In one embodiment of the application, the parallel connection rectification topology further include: filter circuit, filter circuit connection
Between the output end of rectification topology in parallel.As shown in Fig. 2, the filter circuit includes one or more filter capacitor CS.
In one embodiment of the application, the parallel connection rectification topology further include: control switching circuit, switching control
The transformer of each rectification circuit of circuit connection controls transformer by output control signal and switches to synchronous push-push operation or synchronization
Reverse phase work.
In one embodiment of the application, control switching circuit includes: single-chip microcontroller and power amplification circuit, and single-chip microcontroller is logical
I/O mouthfuls of the difference multiple synchronous control signals of output are crossed, the transformer for controlling each rectification circuit is separately connected through power amplification circuit.
The application also proposed a kind of LLC resonance circuit, which includes that described in any item parallel connections as above are whole
Topological structure is flowed, so as to flexible, inexpensive, expeditiously realization rectification circuit series-parallel control, also, the LLC is humorous
The circuit that shakes can be full-bridge resonance circuit or half-bridge resonance circuit.
Certainly, the skilled addressee will appreciate that, the above-mentioned rectification topology in parallel of the application can be used for all kinds of need
Transformer is carried out being not limited only to LLC resonance circuit in rectification and the circuit combined in series and parallel.
The above description is merely a specific embodiment, under above-mentioned introduction of the invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of the above embodiments.It will be understood by those skilled in the art that above-mentioned tool
Body description only preferably explains that the purpose of the present invention, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of parallel connection rectification topology, comprising: multiple rectification circuits, each rectification circuit include interconnected
One transformer and a rectifier bridge, which is characterized in that
The rectifier bridge of each rectification circuit is connected in parallel, also, two adjacent rectifier bridges share a bridge arm；Each institute
The transformer synchronous working of rectification circuit is stated, and by switching to synchronous push-push operation or synchronous reverse phase work, is controlled each described
Rectification circuit series connection output or parallel output.
2. parallel connection rectification topology according to claim 1, which is characterized in that in each rectification circuit, the change
Depressor is allowed hand over to fully synchronized push-push operation, is connected jointly output with controlling each rectification circuit.
3. parallel connection rectification topology according to claim 1, which is characterized in that in each rectification circuit, the change
Depressor is allowed hand over to reverse phase work is alternately synchronized one by one, to control each common parallel output of the rectification circuit.
4. parallel connection rectification topology according to claim 1, which is characterized in that in each rectification circuit, the change
It is the synchronous push-push operation of transformer in one group, every group that depressor, which is allowed hand over to every N number of adjacent transformer, between adjacent sets
The synchronous reverse phase work of transformer, to control per N number of adjacent rectification circuit series connection, and with adjacent other are N number of described whole
Current circuit is in parallel.
5. parallel connection rectification topology according to claim 1-4, which is characterized in that the parallel connection rectification topology knot
Structure further include: filter circuit, the filter circuit are connected between the output end of the rectification topology in parallel.
6. parallel connection rectification topology according to claim 5, which is characterized in that the filter circuit includes one or more
A filter capacitor.
7. parallel connection rectification topology according to claim 1-4, which is characterized in that the parallel connection rectification topology knot
Structure further include: control switching circuit, the control switching circuit connect the transformer of each rectification circuit, output control signal
It controls the transformer and switches to synchronous push-push operation or synchronous reverse phase work.
8. parallel connection rectification topology according to claim 7, which is characterized in that the control switching circuit includes: list
Piece machine and power amplification circuit, the single-chip microcontroller are separately connected the transformer for controlling each rectification circuit by different I/O mouthfuls.
9. parallel connection rectification topology according to claim 1, which is characterized in that there are two the rectification circuit settings,
The transformer of two rectification circuits is exported by switching to synchronous push-push operation, the rectification circuit series connection of control two,
The transformer of two rectification circuits is worked by switching to synchronous reverse phase, controls two rectification circuit parallel outputs.
10. a kind of LLC resonance circuit, which is characterized in that the LLC resonance circuit includes as claim 1-9 is described in any item
Rectification topology in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910435369.8A CN110233579A (en) | 2019-05-23 | 2019-05-23 | A kind of parallel connection rectification topology and a kind of LLC resonance circuit |
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| CN201910435369.8A CN110233579A (en) | 2019-05-23 | 2019-05-23 | A kind of parallel connection rectification topology and a kind of LLC resonance circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1278294A1 (en) * | 2001-07-16 | 2003-01-22 | CPAutomation S.A. | An electrical power supply suitable in particular for dc plasma processing |
| CN103391005A (en) * | 2013-07-24 | 2013-11-13 | 深圳市航天新源科技有限公司 | Power-extensible variable-structure converter |
| CN106992688A (en) * | 2017-06-10 | 2017-07-28 | 张炳耀 | Super high power ZVS+ZCS integrates Sofe Switch DC/DC converters |
| CN210041667U (en) * | 2019-05-23 | 2020-02-07 | 北京动力源科技股份有限公司 | Parallel rectification topological structure and LLC resonant circuit |
-
2019
- 2019-05-23 CN CN201910435369.8A patent/CN110233579A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1278294A1 (en) * | 2001-07-16 | 2003-01-22 | CPAutomation S.A. | An electrical power supply suitable in particular for dc plasma processing |
| CN103391005A (en) * | 2013-07-24 | 2013-11-13 | 深圳市航天新源科技有限公司 | Power-extensible variable-structure converter |
| CN106992688A (en) * | 2017-06-10 | 2017-07-28 | 张炳耀 | Super high power ZVS+ZCS integrates Sofe Switch DC/DC converters |
| CN210041667U (en) * | 2019-05-23 | 2020-02-07 | 北京动力源科技股份有限公司 | Parallel rectification topological structure and LLC resonant circuit |
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