CN112350299A - Electronic equipment and power supply unit thereof - Google Patents
Electronic equipment and power supply unit thereof Download PDFInfo
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- CN112350299A CN112350299A CN202011143531.8A CN202011143531A CN112350299A CN 112350299 A CN112350299 A CN 112350299A CN 202011143531 A CN202011143531 A CN 202011143531A CN 112350299 A CN112350299 A CN 112350299A
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- bridge resonant
- power supply
- supply unit
- circuits
- balance coils
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- 230000000694 effects Effects 0.000 abstract description 6
- 238000004804 winding Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/25—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 arranged for operation in series, e.g. for multiplication of voltage
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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 invention provides an electronic device and a power supply unit thereof, belonging to the technical field of electronic engineering, wherein the power supply unit comprises two half-bridge resonant topological circuits and two balance coils; the input ends of the two half-bridge resonant topology circuits are respectively connected with two ends of an alternating current input, and the output ends of the two half-bridge resonant topology circuits are respectively connected with two ends of a direct current load; the two balance coils are respectively wound on the primary side or the secondary side of the two half-bridge resonant topology circuits; the number of turns of the two balance coils is equal, and the two balance coils are connected end to end. The two balance coils are respectively in a winding mode in a transformer of a half-bridge resonant topological circuit, the function of balancing current is achieved through parallel current sharing, extra occupied space is not needed, complex circuit control is avoided, a good current sharing effect can be achieved by utilizing a basic physical principle, and due to the fact that the passive component is simply used, errors are not prone to occurring, and the problem of good reliability is solved.
Description
Technical Field
The invention relates to the technical field of electronic engineering, in particular to electronic equipment and a power supply unit thereof.
Background
Along with the requirements of users on power consumption quality and high power density, the parallel connection of power supplies is more and more common, the practice of current uniformity is the major difficulty that power supplies are connected in parallel and need to be overcome, and most of the traditional current-sharing modes are used for controlling the current uniformity by regulating voltage through Share bus communication.
This approach is often more complicated and involves control of the feedback, if there is no optimal adjustment, the current will not be uniform, and the risk of system instability or even damage will be caused seriously.
Disclosure of Invention
The invention aims to provide an electronic device and a power supply unit thereof, which are used for relieving (reducing and reducing the technical problem that the current balancing purpose achieved through a current-sharing inductor in the prior art is used as an isolation power supply with low cost and high efficiency.
In a first aspect, the present invention provides a power supply unit, including two half-bridge resonant topology circuits and two balance coils;
the input ends of the two half-bridge resonant topology circuits are respectively connected with two ends of an alternating current input, and the output ends of the two half-bridge resonant topology circuits are respectively connected with two ends of a direct current load;
the two balance coils are respectively wound on the primary side or the secondary side of the two half-bridge resonant topology circuits;
the number of turns of the two balance coils is equal, and the two balance coils are connected end to end.
Further, the power factor correction circuit is connected between each half-bridge resonant topological circuit and the alternating current input.
Further, the power factor correction circuit comprises an electromagnetic interference filter circuit connected between each power factor correction circuit and the alternating current input.
Further, the half-bridge resonant topology circuit comprises a primary coil and a secondary coil;
one end of the primary coil is connected with an alternating current input, the other end of the primary coil is grounded, and two ends of the secondary coil are respectively connected with one end of a direct current load through diodes.
Further, the midpoint of the secondary coil of the half-bridge resonant topology circuit is grounded.
Further, the power supply of the alternating current input is 220V.
In a second aspect, the invention further provides an electronic device including the power supply unit.
Further, the electronic device is a server.
Advantageous effects
Correspondingly, the electronic equipment and the power supply unit thereof provided by the embodiment of the invention comprise two half-bridge resonant topology circuits and two balance coils; the input ends of the two half-bridge resonant topology circuits are respectively connected with two ends of an alternating current input, and the output ends of the two half-bridge resonant topology circuits are respectively connected with two ends of a direct current load; the two balance coils are respectively wound on the primary side or the secondary side of the two half-bridge resonant topology circuits; the number of turns of the two balance coils is equal, and the two balance coils are connected end to end. The two balance coils are respectively in a winding mode in a transformer of a half-bridge resonant topological circuit, the function of balancing current is achieved through parallel current sharing, extra occupied space is not needed, complex circuit control is avoided, a good current sharing effect can be achieved by utilizing a basic physical principle, and due to the fact that the passive component is simply used, errors are not prone to occurring, and the problem of good reliability is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a prior art circuit diagram;
FIG. 2 is a prior art analog waveform diagram;
fig. 3 is a schematic diagram of a power supply unit according to an embodiment of the invention;
FIG. 4 is a voltage line graph of an embodiment of the present invention;
fig. 5 is an ac circuit diagram of an LLC resonant converter according to an embodiment of the present invention;
fig. 6 is a gain curve diagram of the LLC resonant converter provided in the embodiment of the present invention;
FIG. 7 is a diagram of a balanced simulated waveform provided by an embodiment of the present invention;
FIG. 8 is a circuit diagram of a power supply unit according to an embodiment of the present invention;
fig. 9 is a partial circuit diagram of the balance coil of fig. 8.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a new method for parallel current sharing of half-bridge resonant LLC topology, and the current balancing can be achieved through a current sharing inductor and used as an isolation power supply with low cost and high efficiency.
The invention provides a technical scheme, and a power supply unit comprises two half-bridge resonant topological circuits and two balance coils;
the input ends of the two half-bridge resonant topology circuits are respectively connected with two ends of an alternating current input, and the output ends of the two half-bridge resonant topology circuits are respectively connected with two ends of a direct current load;
the two balance coils are respectively wound on the primary side or the secondary side of the two half-bridge resonant topology circuits;
the number of turns of the two balance coils is equal, and the two balance coils are connected end to end.
Preferably, the Power Factor Correction (PFC) circuit is connected between each half-bridge resonant topology circuit and the ac input. Power factor correction refers to improving the power factor and bringing the power factor close to 1. This is done by bringing the power factor angle (phase angle) close to 0 deg., thereby reducing the voltage to current phase difference and bringing the apparent power close to the real power. While suppressing harmonic currents. Harmonic suppression has been classified by the international standard IEC61000-3-2 as limiting and specifying maximum rated harmonic currents, and the corresponding electronic devices are basically equipped with power factor correction circuits.
Preferably, the power factor correction circuit further comprises an electromagnetic Interference (EMI) filter circuit connected between each power factor correction circuit and the ac input. The EMI filter circuit is an electronic passive component for suppressing a signal or a power line in which conducted interference exists. Electromagnetic interference is natural or man-made unacceptable electromagnetic radiation that causes degradation or malfunction of electronic equipment. EMI filter circuits are devices that can be used to suppress electromagnetic interference, and are typically composed of components that suppress differential and common mode interference.
Preferably, the half-bridge resonant topology circuit comprises a primary coil and a secondary coil;
one end of the primary coil is connected with an alternating current input, the other end of the primary coil is grounded, and two ends of the secondary coil are respectively connected with one end of a direct current load through diodes.
Preferably, the midpoint of the secondary coil of the half-bridge resonant topology circuit is grounded.
Preferably, the power supply of the alternating current input is 220V.
The invention further provides electronic equipment which comprises the power supply unit provided by the embodiment.
Preferably, the electronic device is a server.
In this embodiment, as shown in fig. 1, R11 ═ 50m ohm & R12 ═ 5m ohm are equivalent impedances generated by the parallel paths.
As shown in fig. 2, if no current sharing control is performed, R11 is 2.2A, R12 is 7.7A, and the difference between the two sets of output currents is very large.
As shown in fig. 3, 8 and 9, the embodiment of the present invention adds two balance coils with equal turns. Two balance coils are respectively wound on the primary sides of the two half-bridge resonant topological circuits, are connected with each other end to end and participate in resonance to form a circuit balance effect. Specifically, the first balance coil N1 and the primary coil of the transformer of the first half-bridge resonant topology circuit are wound on the same iron core, the second balance coil N2 and the primary coil of the transformer of the second half-bridge resonant topology circuit are wound on the same iron core, the 12 ports of the upper end of the first balance coil N1 are connected with the 12 ports of the lower end of the second balance coil N2, and the 11 ports of the lower end of the first balance coil N1 are connected with the 11 ports of the upper end of the second balance coil N2, so that the first balance coil N1 and the first half-bridge resonant topology circuit are connected with each other end to end.
In other embodiments, two balancing coils may also be wound on the secondary sides of the two half-bridge resonant topology circuits respectively to form an end-to-end connection, which can also participate in resonance to form a circuit balancing effect.
As shown in fig. 4, since the balance coil causes the resonant tank to change and thus the amplification gain to be changed, the output voltages V1 and V2 are changed, respectively.
As shown in fig. 5, Cr is a resonant capacitance, Lr is a resonant inductance, Lm is an inductance, Np is a primary side turn number, Ns is a secondary side turn number, R0 is a secondary side load, and Ra is a primary side equal calibration load. Different voltages are equivalent to different output loads R0, and according to the ratio n of the primary side turn number Np to the secondary side turn number Ns, the equivalent to the primary side alternating current load Rac can be achieved.
As shown in fig. 6, where Q is the quality factor, it can be known that different Rac will affect the gain curve, resulting in different voltage outputs of two parallel LLC circuits, and further changing the output voltage results in natural balance of the output current.
As shown in fig. 7, it can be seen from the simulation results that the current output can achieve the current sharing effect by adding the balance coil and finding that the current flows through the output equivalent resistor R11-5A, R12-5A.
The ideal transformer current and the winding ratio are in inverse proportion, and the result that the same current on the primary side and the same current on the secondary side of the transformer can be achieved through the transformer with the equal ratio of 1:1 can be described as follows:
N1i1＝N2i2
the above equation, which is a relationship between transformer current and number of turns, where N is the relationship between transformer current and number of turns, shows that the same number of turns will have the same current, and the voltage of an ideal transformer is proportional to the number of turns and the current is inversely proportional to the number of turns1Primary side number of turns, N2Secondary side number of turns, i1Is a primary side current i2Is given as followsStage side current.
The terms "comprising" and "having," and any variations thereof, as referred to in embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, but are only used for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or components that are referred to must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (8)
1. A power supply unit is characterized by comprising two half-bridge resonant topological circuits and two balance coils;
the input ends of the two half-bridge resonant topology circuits are respectively connected with two ends of an alternating current input, and the output ends of the two half-bridge resonant topology circuits are respectively connected with two ends of a direct current load;
the two balance coils are respectively wound on the primary side or the secondary side of the two half-bridge resonant topology circuits;
the number of turns of the two balance coils is equal, and the two balance coils are connected end to end.
2. The power supply unit of claim 1, further comprising a power factor correction circuit connected between each half-bridge resonant topology circuit and the ac input.
3. The power supply unit of claim 2, further comprising an electromagnetic interference filter circuit connected between each power factor correction circuit and the ac input.
4. The power supply unit of claim 1, wherein the half-bridge resonant topology circuit comprises a primary coil and a secondary coil;
one end of the primary coil is connected with an alternating current input, the other end of the primary coil is grounded, and two ends of the secondary coil are respectively connected with one end of a direct current load through diodes.
5. The power supply unit of claim 4, wherein a midpoint of the secondary coil of the half-bridge resonant topology circuit is grounded.
6. The power supply unit of claim 1, wherein the power supply of the ac input is 220V.
7. An electronic device characterized by comprising a power supply unit according to any one of claims 1 to 6.
8. The electronic device of claim 7, wherein the electronic device is a server.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011143531.8A CN112350299A (en) | 2020-10-23 | 2020-10-23 | Electronic equipment and power supply unit thereof |
| PCT/CN2021/109186 WO2022083205A1 (en) | 2020-10-23 | 2021-07-29 | Electronic device and power supply unit therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011143531.8A CN112350299A (en) | 2020-10-23 | 2020-10-23 | Electronic equipment and power supply unit thereof |
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| Publication Number | Publication Date |
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| CN112350299A true CN112350299A (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011143531.8A Pending CN112350299A (en) | 2020-10-23 | 2020-10-23 | Electronic equipment and power supply unit thereof |
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| CN (1) | CN112350299A (en) |
| WO (1) | WO2022083205A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022083205A1 (en) * | 2020-10-23 | 2022-04-28 | 苏州浪潮智能科技有限公司 | Electronic device and power supply unit therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873739A (en) * | 2009-04-27 | 2010-10-27 | 台达电子工业股份有限公司 | Current-balancing supply circuit with multiple groups of DC loads |
| CN204859623U (en) * | 2015-06-25 | 2015-12-09 | 深圳麦格米特电气股份有限公司 | LED multichannel current -sharing control circuit |
| CN110588395A (en) * | 2019-09-09 | 2019-12-20 | 国网山东省电力公司金乡县供电公司 | Vehicle-mounted charger control circuit and method, charger and electric vehicle |
| CN210380663U (en) * | 2019-09-30 | 2020-04-21 | 深圳古瑞瓦特新能源股份有限公司 | Bidirectional multipath parallel full-bridge LLC resonant converter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9125259B1 (en) * | 2012-05-03 | 2015-09-01 | Universal Lighting Technologies, Inc. | Constant current drive circuit for multi-channel LED lighting |
| US8929109B2 (en) * | 2012-11-30 | 2015-01-06 | Chung-Shan Institute Of Science And Technology | Double-output half-bridge LLC serial resonant converter |
| CN112350299A (en) * | 2020-10-23 | 2021-02-09 | 苏州浪潮智能科技有限公司 | Electronic equipment and power supply unit thereof |
-
2020
- 2020-10-23 CN CN202011143531.8A patent/CN112350299A/en active Pending
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2021
- 2021-07-29 WO PCT/CN2021/109186 patent/WO2022083205A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873739A (en) * | 2009-04-27 | 2010-10-27 | 台达电子工业股份有限公司 | Current-balancing supply circuit with multiple groups of DC loads |
| CN204859623U (en) * | 2015-06-25 | 2015-12-09 | 深圳麦格米特电气股份有限公司 | LED multichannel current -sharing control circuit |
| CN110588395A (en) * | 2019-09-09 | 2019-12-20 | 国网山东省电力公司金乡县供电公司 | Vehicle-mounted charger control circuit and method, charger and electric vehicle |
| CN210380663U (en) * | 2019-09-30 | 2020-04-21 | 深圳古瑞瓦特新能源股份有限公司 | Bidirectional multipath parallel full-bridge LLC resonant converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022083205A1 (en) * | 2020-10-23 | 2022-04-28 | 苏州浪潮智能科技有限公司 | Electronic device and power supply unit therefor |
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| WO2022083205A1 (en) | 2022-04-28 |
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