CN112837915A - Power circuit and power supply capable of dynamically changing inductance - Google Patents
Power circuit and power supply capable of dynamically changing inductance Download PDFInfo
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- CN112837915A CN112837915A CN202110240946.5A CN202110240946A CN112837915A CN 112837915 A CN112837915 A CN 112837915A CN 202110240946 A CN202110240946 A CN 202110240946A CN 112837915 A CN112837915 A CN 112837915A
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- power supply
- inductor
- inductors
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- inductance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
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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
- H02M1/00—Details of apparatus for conversion
Abstract
The embodiment of the invention discloses a power circuit and a power supply capable of dynamically changing inductance. Wherein, this power supply circuit includes: splitting all or part of inductors in an original power supply circuit into a plurality of same inductors, and adding one or more switches, wherein the original power supply circuit is any power supply circuit with inductors; the connection of the same inductors and the one or more switches is configured to be capable of manually switching the switches according to the load of the power supply, so as to change the series-parallel connection state of the inductors, and thus dynamically change the inductance of the original inductor and the direct current resistance of the original inductor. According to the technical scheme of the embodiment of the invention, a single inductor of an original power supply is changed into a plurality of inductors, and the series-parallel connection mode of the plurality of inductors is dynamically changed according to the load requirement, so that the inductance of the inductor and the direct-current resistance of the inductor are changed, the current loss of the inductor is reduced, and the power supply weighting efficiency is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of power supplies, in particular to a power supply circuit and a power supply capable of dynamically changing inductance.
Background
At present, high-power supplies are more and more, the efficiency of the power supplies determines the utilization rate of electric energy, and in order to better utilize limited electric energy and save electricity, the efficiency requirement of the power supplies is higher and higher. The efficiency of the power supply does not always work at a certain fixed value, and is often different under different power outputs. Many power supplies are inefficient at light loads (10% to 30%). For a high-power supply, such as a 100kVA UPS, 20kW is also available at 20% load, and if the light load efficiency is low, a great deal of electric energy waste is also caused. In the practical situation, many high-power supplies are designed according to the maximum load, but the working conditions are not always working under the full-load working conditions, and typically, some voltage-stabilizing and voltage-regulating power supplies such as a UPS (uninterrupted power supply), a photovoltaic inverter and the like are provided. Therefore, no good means exists for improving the light load efficiency of high power at present, and once a power supply is developed, the efficiency curve of the whole machine is basically fixed. The inductance loss in the power supply greatly affects the efficiency of the whole power supply, and once the inductance and the direct-current resistance of an inductance device in the circuit are determined to be fixed values, the size of the inductance loss cannot be dynamically changed according to the load condition.
Disclosure of Invention
The embodiment of the invention provides a power circuit and a power supply capable of dynamically changing an inductor, so that switching of a switch is realized according to the size of a load, series-parallel connection of the inductor is realized, inductance and resistance in the circuit are dynamically changed, and the whole loss of the inductor is reduced according to the dynamic load, so that the power weighting efficiency is improved.
In a first aspect, an embodiment of the present invention provides a power supply circuit for dynamically changing an inductance, including:
splitting all or part of inductors in an original power supply circuit into a plurality of same inductors, and adding one or more switches, wherein the original power supply circuit is any power supply circuit with inductors;
the connection of the same inductors and the one or more switches is configured to be capable of manually switching the switches according to the load of the power supply, so as to change the series-parallel connection state of the inductors, and thus dynamically change the inductance of the original inductor and the direct current resistance of the original inductor.
Optionally, when the power supply works under a heavy load, the switch is switched, and the plurality of inductors are connected in parallel; when the power supply works under light load, the switch is switched, and the plurality of inductors are connected in series.
Optionally, the plurality of identical inductors are three identical inductors L1, L2, and L3, and the one or more switches are two switches K1 and K2; wherein:
an inductor L1, an inductor L2 and an inductor L3 are sequentially connected in series end to end, a switch K1 is connected in parallel at two ends of the series combination of the inductor L1 and the inductor L2, and a switch K2 is connected in parallel at two ends of the series combination of the inductor L2 and the inductor L3;
when the power supply works in a heavy load, the switches K1 and K2 are closed, and the inductors L1, L2 and L3 are connected in parallel;
when the power supply works in light load, the switches K1 and K2 are disconnected, and the inductors L1, L2 and L3 are connected in series.
Optionally, the inductors L1, L2, and L3 are three-winding magnetic cores in common or three-winding magnetic cores in no common.
Optionally, the plurality of identical inductors are two identical inductors L4, L5, and the one or more switches are a single-pole double-throw switch K3 and a single-pole single-throw switch K4; wherein:
a first switch wiring terminal of the single-pole double-throw switch K3 is connected with a first end of an inductor L4, a second switch wiring terminal is connected with a second end of an inductor L4, a common terminal is connected with a first end of an inductor L5, and a single-pole single-throw switch K4 is connected between a second end of the inductor L5 and a second end of an inductor L4;
when the power supply works under heavy load, the single-pole double-throw switch K3 closes the first switch wiring terminal, the single-pole single-throw switch K4 is closed, and the inductors L4 and L5 are connected in parallel;
when the power supply works under light load, the single-pole double-throw switch K3 closes the second switch wiring terminal, the single-pole single-throw switch K4 is disconnected, and the inductors L4 and L5 are connected in series.
Optionally, the inductors L4 and L5 are two windings sharing a core or two windings not sharing a core.
In a second aspect, an embodiment of the present invention further provides a power supply, where the power supply includes the power supply circuit with dynamically changing inductance described in any of the above embodiments.
According to the technical scheme of the embodiment of the invention, a single inductor of an original power supply is changed into a plurality of inductors, and the series-parallel connection mode of the plurality of inductors is dynamically changed according to the load requirement, so that the inductance of the inductor and the direct-current resistance of the inductor are changed, the current loss of the inductor is reduced, and the power supply weighting efficiency is improved.
Drawings
FIG. 1 is a schematic circuit diagram of a power circuit with dynamically changing inductance according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of an inductive winding scheme according to a first embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of another power circuit with dynamically changing inductance in accordance with one embodiment of the present invention;
fig. 4 is a schematic diagram of another inductive winding method in accordance with a first embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
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, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "first switch connection terminal" and "second switch connection terminal" are two different switch connection terminals.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
The embodiment of the invention provides a power supply circuit capable of dynamically changing inductance, which is characterized in that on the basis of an original power supply circuit (the original power supply circuit is any power supply circuit with inductance, such as a UPS (uninterrupted power supply), a photovoltaic inverter and other voltage-stabilizing and voltage-regulating power supplies), all or part of the inductance in the original power supply circuit is split into a plurality of same inductances, and one or more switches are added; the connection of the same inductors and the one or more switches is configured to be capable of manually switching the switches according to the load of the power supply, so as to change the series-parallel connection state of the inductors, and thus dynamically change the inductance of the original inductor and the direct current resistance of the original inductor.
For example, the original power supply circuit has five inductors, in order to reduce the overall damage of the inductors, one or more of the inductors can be split into a plurality of identical inductors according to the actual situation, and a switch is added to be connected with the inductors, the connection mode of the inductors and the switch is configured to realize the series connection or the parallel connection of the plurality of identical inductors by switching the switch, for example, when the power supply works under heavy load, the switch is switched to the state one, and the identical inductors are connected in parallel; when the power supply works in a light load state, the switch is switched to the second state, and the same inductors are connected in series, so that the inductance of the original inductor and the direct-current resistance of the original inductor are dynamically changed, the whole loss of the inductor is reduced according to the dynamic load, and the power supply weighting efficiency is improved.
In order to facilitate understanding of the embodiments of the present invention, the power circuit for dynamically changing inductance of the present embodiment is described below by taking splitting an original inductance into three inductances and splitting the original inductance into two inductances as an example.
Fig. 1 is a circuit schematic diagram of a power circuit for dynamically changing an inductance according to an embodiment of the present invention. Referring to fig. 1, in the power supply circuit with dynamically changed inductance according to the embodiment of the present invention, an inductance in an original power supply circuit is split into three identical inductances L1, L2, and L3, and two switches K1 and K2 are added; wherein:
an inductor L1, an inductor L2 and an inductor L3 are sequentially connected in series end to end, a switch K1 is connected in parallel at two ends of the series combination of the inductor L1 and the inductor L2, and a switch K2 is connected in parallel at two ends of the series combination of the inductor L2 and the inductor L3; when the power supply works in a heavy load, the switches K1 and K2 are closed, and the inductors L1, L2 and L3 are connected in parallel; when the power supply works in light load, the switches K1 and K2 are disconnected, and the inductors L1, L2 and L3 are connected in series.
The inductors L1, L2 and L3 are three-winding common cores or three-winding non-common cores. Specifically, as shown in fig. 2, the three inductance windings L1, L2, and L3 may be independent, but require L1 ═ L2 ═ L3; the three windings can share the magnetic core, and the wire diameters of the three windings sharing the magnetic core need to be the same.
Specifically, as shown in fig. 1, when the power supply works under heavy load, the switches K1 and K2 are closed; at the moment, the inductors L1, L2 and L3 are connected in parallel;
inductance L of ab terminalab＝L1//L2//L3＝L1/3＝L2/3＝L3/3
ab terminal DC resistance Rab＝RL1/3＝RL2/3＝RL3/3
When the power supply works under heavy load, the loss of the inductor is mainly the winding loss, and when the L1, the L2 and the L3 are connected in parallel, the resistance is reduced to one third of that of a single inductor, so that the loss is reduced and the efficiency is improved.
Continuing with FIG. 1, when the power supply is operating at light load, switches K1, K2 are opened; at the moment, the inductors L1, L2 and L3 are connected in series;
inductance L of ab terminalab＝L1+L2+L3＝3L1＝3L2＝3L3
ab terminal DC resistance Rab＝RL1+RL2+RL3＝3RL1＝3RL2＝3RL3
When the power supply works under light load, the inductance loss is mainly the magnetic core loss, and at the moment, L1, L2 and L3 are connected in series, so that the inductance is increased, and the magnetic core loss is reduced.
According to the technical scheme of the embodiment of the invention, a single inductor of an original power supply is changed into three inductors, and the series-parallel connection mode of the three inductors is dynamically changed according to the load requirement, so that the inductance of the inductor and the direct-current resistance of the inductor are changed, the current loss of the inductor is reduced, and the power supply weighting efficiency is improved.
Fig. 3 is a circuit diagram of another power circuit for dynamically changing an inductance according to an embodiment of the present invention. Referring to fig. 3, in the power supply circuit with dynamically changed inductance according to the embodiment of the present invention, an inductance in an original power supply circuit is split into two identical inductances L4 and L5, and a single-pole double-throw switch K3 and a single-pole single-throw switch K4 are added; wherein:
a first switch wiring terminal of the single-pole double-throw switch K3 is connected with a first end of an inductor L4, a second switch wiring terminal is connected with a second end of an inductor L4, a common terminal is connected with a first end of an inductor L5, and a single-pole single-throw switch K4 is connected between a second end of the inductor L5 and a second end of an inductor L4; when the power supply works under heavy load, the single-pole double-throw switch K3 closes the first switch wiring terminal, the single-pole single-throw switch K4 is closed, and the inductors L4 and L5 are connected in parallel; when the power supply works under light load, the single-pole double-throw switch K3 closes the second switch wiring terminal, the single-pole single-throw switch K4 is disconnected, and the inductors L4 and L5 are connected in series.
The inductors L4 and L5 are two windings sharing a magnetic core or two windings not sharing a magnetic core. Specifically, as shown in fig. 4, the two inductance windings L4 and L5 may be independent, but L4 is L5; the two windings can also share a magnetic core, and the wire diameters of the two windings in the magnetic core need to be the same.
Specifically, as shown in fig. 3, when the power supply operates under heavy load, the AC of the switch K3 is closed, that is, the first switch connection terminal of the switch K3 is connected to the first terminal of the inductor L4, and the switch K4 is closed, where the inductors L4 and L5 are connected in parallel;
inductance L of ab terminalab＝L4//L5＝L4/2＝L5/2
ab terminal DC resistance Rab＝RL4//RL5＝RL4/2＝RL5/2
When the power supply works under heavy load, the loss of the inductor is mainly the winding loss, and when the L4 and the L5 are connected in parallel, the resistance is reduced to one half of that of a single inductor, so that the loss is reduced, and the efficiency is improved.
Continuing with fig. 3, when the power supply operates under light load, BC of the switch K3 is closed, that is, the second switch connection terminal of the switch K3 is connected to the second terminal of the inductor L4, and the switch K4 is opened, at this time, the inductors L4 and L5 are connected in series;
inductance L of ab terminalab＝L4+L5＝2L4＝2L5
ab terminal DC resistance Rab＝RL4+RL5＝2RL4＝2RL5
When the power supply works under light load, the inductance loss is mainly the magnetic core loss, and at the moment, L4 and L5 are connected in series, so that the inductance is increased, and the magnetic core loss is reduced.
According to the technical scheme of the embodiment of the invention, a single inductor of an original power supply is changed into two inductors, and the series-parallel connection mode of the two inductors is dynamically changed according to the load requirement, so that the inductance of the inductor and the direct-current resistance of the inductor are changed, the current loss of the inductor is reduced, and the power supply weighting efficiency is improved.
In the implementation, when the power load power of the power supply is low, the plurality of inductors or the plurality of windings are connected in series, because the winding loss of the inductor is not the main loss of the inductor when the power load is light, and the magnetic loss is the main loss of the inductor, the windings are connected in series at this time, so that the magnetic core loss is greatly reduced; when the power load power of the power supply is high, the multi-inductor or the multi-winding adopts a parallel connection mode, because the loss of the inductor is mainly the loss of the winding during heavy load, the multi-winding parallel resistance is greatly reduced to reduce the loss of the winding. The weighting efficiency of the power supply can be improved.
Example two
An embodiment of the present invention provides a power supply, which includes the power supply circuit with dynamically changing inductance as described in any one of the first embodiment. Under the condition that the inductance of a single inductor and the direct-current resistance of an inductor winding of an original power supply can not be dynamically changed according to actual working conditions, the single inductor is changed into a plurality of inductors or the single inductor is dynamically changed according to load requirements by a plurality of windings through series-parallel connection, so that the current loss of the inductor is reduced, and the power supply weighting efficiency is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (7)
1. A power supply circuit for dynamically varying an inductance, comprising:
splitting all or part of inductors in an original power supply circuit into a plurality of same inductors, and adding one or more switches, wherein the original power supply circuit is any power supply circuit with inductors;
the connection of the same inductors and the one or more switches is configured to be capable of manually switching the switches according to the load of the power supply, so as to change the series-parallel connection state of the inductors, and thus dynamically change the inductance of the original inductor and the direct current resistance of the original inductor.
2. The power supply circuit for dynamically changing inductance according to claim 1, wherein when the power supply is operated under heavy load, the switch is switched to connect the plurality of inductances in parallel; when the power supply works under light load, the switch is switched, and the plurality of inductors are connected in series.
3. The dynamically varying inductance power supply circuit as claimed in claim 2, wherein said plurality of identical inductances are three identical inductances L1, L2, L3, and said one or more switches are two switches K1, K2; wherein:
an inductor L1, an inductor L2 and an inductor L3 are sequentially connected in series end to end, a switch K1 is connected in parallel at two ends of the series combination of the inductor L1 and the inductor L2, and a switch K2 is connected in parallel at two ends of the series combination of the inductor L2 and the inductor L3;
when the power supply works in a heavy load, the switches K1 and K2 are closed, and the inductors L1, L2 and L3 are connected in parallel;
when the power supply works in light load, the switches K1 and K2 are disconnected, and the inductors L1, L2 and L3 are connected in series.
4. The power supply circuit for dynamically changing inductance according to claim 3, wherein the inductances L1, L2 and L3 are three-winding common cores or three-winding non-common cores.
5. The dynamically varying inductance power supply circuit as claimed in claim 2, wherein said plurality of identical inductances are two identical inductances L4, L5, and said one or more switches are a single pole double throw switch K3 and a single pole single throw switch K4; wherein:
a first switch wiring terminal of the single-pole double-throw switch K3 is connected with a first end of an inductor L4, a second switch wiring terminal is connected with a second end of an inductor L4, a common terminal is connected with a first end of an inductor L5, and a single-pole single-throw switch K4 is connected between a second end of the inductor L5 and a second end of an inductor L4;
when the power supply works under heavy load, the single-pole double-throw switch K3 closes the first switch wiring terminal, the single-pole single-throw switch K4 is closed, and the inductors L4 and L5 are connected in parallel;
when the power supply works under light load, the single-pole double-throw switch K3 closes the second switch wiring terminal, the single-pole single-throw switch K4 is disconnected, and the inductors L4 and L5 are connected in series.
6. The dynamically varying inductance power supply circuit as claimed in claim 5, wherein the inductances L4, L5 are two windings sharing a core or two windings not sharing a core.
7. A power supply, characterized in that it comprises a dynamically varying inductance power supply circuit as claimed in any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110240946.5A CN112837915A (en) | 2021-03-04 | 2021-03-04 | Power circuit and power supply capable of dynamically changing inductance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110240946.5A CN112837915A (en) | 2021-03-04 | 2021-03-04 | Power circuit and power supply capable of dynamically changing inductance |
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| CN112837915A true CN112837915A (en) | 2021-05-25 |
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| CN202110240946.5A Pending CN112837915A (en) | 2021-03-04 | 2021-03-04 | Power circuit and power supply capable of dynamically changing inductance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824321A (en) * | 2021-10-27 | 2021-12-21 | 陕西亚成微电子股份有限公司 | Circuit and method for improving load switching response speed |
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2021
- 2021-03-04 CN CN202110240946.5A patent/CN112837915A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824321A (en) * | 2021-10-27 | 2021-12-21 | 陕西亚成微电子股份有限公司 | Circuit and method for improving load switching response speed |
| CN113824321B (en) * | 2021-10-27 | 2022-05-13 | 陕西亚成微电子股份有限公司 | Circuit and method for improving load switching response speed |
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