CN102208242B - Magnetic integration inductor and manufacturing method thereof, and bridgeless power factor correct (PFC) circuit - Google Patents
Magnetic integration inductor and manufacturing method thereof, and bridgeless power factor correct (PFC) circuit Download PDFInfo
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- CN102208242B CN102208242B CN2011100665980A CN201110066598A CN102208242B CN 102208242 B CN102208242 B CN 102208242B CN 2011100665980 A CN2011100665980 A CN 2011100665980A CN 201110066598 A CN201110066598 A CN 201110066598A CN 102208242 B CN102208242 B CN 102208242B
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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
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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
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- Y02P80/00—Climate change mitigation technologies for sector-wide applications
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Abstract
The embodiment of the invention provides a magnetic integration inductor and a manufacturing method thereof, and a bridgeless power factor correct (PFC) circuit in order to enhance the power density of a power supply. The magnetic integration inductor comprises two E-shaped magnetic cores, an I-shaped magnetic core and two windings, wherein the two E-shaped magnetic cores are overlapped up and down in a manner that the opening positions correspond to each other; the I-shaped magnetic core is clamped between the two up and down overlapped E-shaped magnetic cores; and the two windings are coiled on center magnetic pillars of the two up and down overlapped E-shaped magnetic cores respectively. Compared with two separated inductors, the magnetic integration inductor of the embodiment of the invention has the advantage of reducing the volume of one I-shaped magnetic core and is favorable to enhancing of the power density of the power supply. The embodiment of the invention can be used in the field of circuits for power alternating-current rectification transformation.
Description
Technical field
The present invention relates to power electronics AC rectification technical field, be specifically related to a kind of magnetic integrated inductor and preparation method thereof and a kind of non-bridge PFC (Power factor Correct, power factor correction) circuit.
Background technology
For promoting the conversion efficiency of power, in AC-AC (AC-AC) translation circuit, non-bridge PFC circuits is the most a kind of efficient power change-over circuit of normal use of industry.The inventor finds in realizing process of the present invention, and employed converter is two discrete inductances in the existing non-bridge PFC circuits, and each discrete inductance is made of an E type magnetic core and an I type magnetic core, and winding is on the center magnetic post of E type magnetic core.Because the pfc converter volume of two discrete inductance formations is bigger, thereby restricted the raising of power density.
Summary of the invention
The embodiment of the invention provides a kind of magnetic integrated inductor and preparation method thereof and a kind of non-bridge PFC circuits, can improve power density.
The embodiment of the invention adopts following technical scheme:
A kind of manufacture method of magnetic integrated inductor comprises:
With two windings respectively on the center magnetic post of two E type magnetic cores;
Described two the E type magnetic cores that are wound with winding are stacked up and down in the corresponding mode of aperture position;
An I type magnetic core is clipped in the middle of stacked up and down described two E type magnetic cores.
A kind of magnetic integrated inductor comprises: two E type magnetic cores, an I type magnetic core and two windings; Described two E type magnetic cores are stacked up and down in the corresponding mode of aperture position, and described I type magnetic core is clipped in the middle of stacked up and down described two E type magnetic cores; Described two windings are respectively around the center magnetic post of stacked up and down described two E type magnetic cores.
A kind of non-bridge PFC circuits, comprise pfc converter, S1, S2, four circuit main switches of S3 and S4, two rectifier diodes of D1 and D2, and a storage capacitor, wherein main switch S2 and S4 and main switch S1 and S3 exchange in the effect symmetry of power supply positive and negative half period, and described non-bridge PFC converter is above-mentioned magnetic integrated inductor.
As shown from the above technical solution, because the magnetic integrated inductor of the embodiment of the invention shares an I type magnetic core, compare with two discrete inductances, reduced the volume of an I type magnetic core, thereby improved power density.
Description of drawings
The accompanying drawing of required use is done an introduction simply in below the present invention being described.
The structural representation of a kind of magnetic integrated inductor that Fig. 1 provides for the embodiment of the invention;
The manufacture method schematic diagram of a kind of magnetic integrated inductor that Fig. 2 provides for the embodiment of the invention;
A kind of non-bridge PFC circuits schematic diagram that Fig. 3 provides for the embodiment of the invention;
The circuit flow of the non-bridge PFC circuits that Fig. 4 (a) to (d) provides for the embodiment of the invention is to schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is clearly and completely described.
Referring to Fig. 1, the magnetic integrated inductor that the embodiment of the invention provides comprises: two E type magnetic cores (11,12), I type magnetic core 13 and two windings (14,15); Described two E type magnetic cores are stacked up and down in the corresponding mode of aperture position, and described I type magnetic core folder 13 is in the middle of stacked up and down described two E type magnetic cores; Described two windings are respectively on the center magnetic post of described two E type magnetic cores.
Because the magnetic integrated inductor of the embodiment of the invention shares an I type magnetic core, compares with two discrete inductances, has reduced the volume of an I type magnetic core, thereby has improved power density.
Further, during loading current, described two windings (14,15) produce the magnetic field of equidirectional in the center magnetic post of stacked up and down described two E type magnetic cores (11,12).
For guaranteeing that winding 14 is identical at the magnetic direction that the center of E type magnetic core 12 magnetic post produces with winding 15 at the magnetic direction that the center of E type magnetic core 11 magnetic post produces, as shown in Figure 1, when equidirectional loading current, a kind of coiling mode is: the direction of winding of winding 14 on the magnetic post of the center of E type magnetic core 11 is for outwards carrying out coiling from top to bottom from the lining; The direction of winding of winding 15 on the magnetic post of the center of E type magnetic core 12 is for outwards carrying out coiling from bottom to top from the lining.Correspondingly another kind of coiling mode is: the direction of winding of winding 14 on the magnetic post of the center of E type magnetic core 11 is for outwards carrying out coiling from bottom to top from the lining; The direction of winding of winding 15 on the magnetic post of the center of E type magnetic core 12 is for outwards carrying out coiling from top to bottom from the lining.
For this reason, under coiling mode shown in Figure 1, when an input current left side was entered the right side and gone out, to the E type magnetic core 11 on being stacked in, winding 14 produced the magnetic field that is directed downwards on the heart magnetic post therein; To the E type magnetic core 12 under being stacked in, winding 15 also produces the magnetic field that is directed downwards on the heart magnetic post therein.Accordingly, when the input current right side was entered a left side and gone out, to stacked E type magnetic core 11,12 up and down, winding 14,15 produced the magnetic field that direction makes progress respectively on the heart magnetic post therein.
Advancing the sight that the right side goes out with an input current left side below is that example describes.Two magnetic loops (21,22) above winding 14 produces as shown in Figure 1 in E type magnetic core 11 and I type magnetic core 13, wherein upper left magnetic loop 21 is clockwise direction, upper right magnetic loop 22 is counterclockwise.Two magnetic loops (23,24) below winding 15 produces as shown in Figure 1 in E type magnetic core 12 and I type magnetic core 13, wherein lower-left magnetic loop 23 is clockwise direction, bottom right magnetic loop 24 is counterclockwise.
Magnetic loop shown in Figure 1 is analyzed: the magnetic direction of upper left magnetic loop 21 in I type magnetic core 13 left, the magnetic direction of lower-left magnetic loop 23 in I type magnetic core 13 to the right, the magnetic flux of two magnetic loops 21 and 23 in I type magnetic core 13 offset each other; The magnetic direction of upper right magnetic loop 22 in I type magnetic core 13 to the right, the magnetic direction of bottom right magnetic loop 24 in I type magnetic core 13 left, the magnetic flux of two magnetic loops 22 and 24 in I type magnetic core 13 offset each other.By above-mentioned analysis as can be known, because the magnetic flux that the magnetic flux that winding 14 produces in I type magnetic core 13 and winding 15 produce in I type magnetic core 13 is offset each other, therefore make the magnetic flux in the I type magnetic core 13 reduce, thereby reduced the iron loss of I type magnetic core 13 on the one hand, make power-efficient get a promotion, the thickness of I type magnetic core 13 can be done thinly on the other hand, reducing the volume of magnetic element, improve power density.
Referring to Fig. 2, the manufacture method of a kind of magnetic integrated inductor that the embodiment of the invention provides comprises:
S21, with two windings respectively on the center magnetic post of two E type magnetic cores;
S22, described two the E type magnetic cores that are wound with winding are stacked up and down in the corresponding mode of aperture position;
S23 is clipped in an I type magnetic core in the middle of stacked up and down described two E type magnetic cores.
Because the magnetic integrated inductor of making by the method for the embodiment of the invention shares an I type magnetic core, compares with two discrete inductances, has reduced the volume of an I type magnetic core, thereby has improved power density.
Further, can also improve power density by reducing the volume that shares I type magnetic core.Feasible scheme is that during loading current, described two windings produce the magnetic field of equidirectional in the center magnetic post of stacked up and down described two E type magnetic cores.
As the above analysis, because two windings produce the magnetic flux of equidirectional at the center of two stacked up and down E type magnetic cores magnetic post during loaded circuit, thereby the magnetic flux that makes two windings produce in sharing I type magnetic core is cancelled out each other, cause the magnetic flux that shares in the I type magnetic core to reduce, this not only can reduce the iron loss of I type magnetic core, and the thickness of I type magnetic core can be done thinly, reduce to share the volume of I type magnetic core, thereby be conducive to the raising of power density.
Be example with the described magnetic integrated inductor of Fig. 1, when equidirectional loading current, for guaranteeing that two windings are in the magnetic field of the center of two stacked up and down E type magnetic cores magnetic post generation equidirectional, a kind of winding mode is: to the E type magnetic core on being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from top to bottom from the lining; To the E type magnetic core under being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from bottom to top from the lining.Another kind of winding mode, to the E type magnetic core on being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from bottom to top from the lining; To the E type magnetic core under being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from top to bottom from the lining.
Referring to Fig. 3, a kind of non-bridge PFC circuits that Fig. 3 provides for the embodiment of the invention.In the non-bridge PFC circuits that the embodiment of the invention provides, S1, S2, S3 and S4 are the circuit main switches, wherein main switch S2 and S4 and main switch S1 and S3 act on the effect symmetry exchange of positive and negative half period of power supply; D1 and D2 are rectifier diodes, and 305 is AC power, and 306 is storage capacitor, and employed pfc converter is magnetic integrated inductor 301.
At the power supply positive half period, just suppose the negative right side, AC power 305 left sides, in a switch periods of non-bridge PFC circuits, at first conducting main switch S2 and S4, turn-off main switch S1 and S3, the input current left side of magnetic integrated inductor 301 each winding was entered the right side and was gone out this moment, the sense of current shown in Fig. 4 (a), the energy storage of charging of 305 pairs of magnetic integrated inductors 301 of power supply.When the voltage of magnetic integrated inductor 301 rises to set point, conducting main switch S1 and S3, turn-off main switch S2 and S4, this moment, magnetic integrated inductor 301 voltages were connected with power supply 305, the sense of current shown in Fig. 4 (b), by storage capacitor 306 chargings of main switch S1 and S3 or backward the converting power source of level transmit energy.When the voltage of magnetic integrated inductor 301 drops to set point, conducting main switch S2 and S4 turn-off main switch S1 and S3 again, begin next switch periods.
In the power-half period, suppose that AC power 305 left sides are positive right negative, in a switch periods of non-bridge PFC circuits, at first conducting main switch S1 and S3, turn-off main switch S2 and S4, the input current right side of magnetic integrated inductor 301 each winding was entered a left side and was gone out this moment, the sense of current shown in Fig. 4 (c), the energy storage of charging of 305 pairs of magnetic integrated inductors 301 of power supply.When the voltage of magnetic integrated inductor 301 rises to set point, conducting main switch S2 and S4, turn-off main switch S1 and S3, this moment, magnetic integrated inductor 301 voltages were connected with power supply 305, the sense of current shown in Fig. 4 (d), by storage capacitor 306 chargings of main switch S2 and S4 or backward the converting power source of level transmit energy.When the voltage of magnetic integrated inductor 301 drops to set point, conducting main switch S1 and S3 turn-off main switch S2 and S4 again, begin next switch periods.
For magnetic integrated inductor 301, during loading current, for guaranteeing that two windings are in the magnetic field of the center of two stacked up and down E type magnetic cores magnetic post generation equidirectional, as shown in Figure 3, a kind of winding mode is: to the E type magnetic core on being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from top to bottom from the lining; To the E type magnetic core under being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from bottom to top from the lining.Correspondingly another kind of winding mode is: to the E type magnetic core on being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from bottom to top from the lining; To the E type magnetic core under being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from top to bottom from the lining.
Like this under winding mode shown in Figure 3, when the input current left side of two windings of magnetic integrated inductor 301 was entered the right side and gone out, two windings all produced the magnetic field that is directed downwards on the center magnetic post of two stacked up and down E type magnetic cores; When the input current right side of 301 two windings of magnetic integrated inductor was entered a left side and gone out, two windings all produced the magnetic field that direction makes progress on the center magnetic post of two stacked up and down E type magnetic cores.
In conjunction with above-mentioned magnetic loop analysis to Fig. 1 as can be known, during loading current, guaranteeing that two windings produce under the prerequisite in equidirectional magnetic field at the center of two stacked up and down E type magnetic cores magnetic post, no matter the input current left side of two windings is entered the right side and is gone out still the right side and enter a left side and go out, the magnetic flux of two winding generations shares in the I type magnetic cores at magnetic integrated inductor 301 and all cancels each other, thereby make the magnetic flux that shares in the I type magnetic core reduce, this has not only reduced the iron loss of I type magnetic core, and can do the thickness of I type magnetic core thin, reduce the volume of magnetic integrated inductor, thereby be conducive to the raising of power density; In addition, the non-bridge PFC circuits of the embodiment of the invention is by using the magnetic integrated inductor, and this magnetic integrated inductor is compared with two discrete inductances, owing to shared I type magnetic core, has reduced the volume of an I type magnetic core, thereby has improved power density.
Be understandable that the magnetic integrated inductor of the embodiment of the invention can be applied in the circuit of all AC Electric Power rectifying conversions, and also can use in polyphase ac.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1. the manufacture method of a magnetic integrated inductor is characterized in that, comprising:
Respectively on the center magnetic post of two E type magnetic cores, during loading current, described two windings produce the magnetic field of equidirectional in the center magnetic post of stacked up and down described two E type magnetic cores with two windings;
Described two the E type magnetic cores that are wound with winding are stacked up and down in the corresponding mode of aperture position;
An I type magnetic core is clipped in the middle of stacked up and down described two E type magnetic cores.
2. the manufacture method of magnetic integrated inductor according to claim 1 is characterized in that, during described loading current, described two windings produce equidirectional in the center magnetic post of stacked up and down described two E type magnetic cores magnetic field comprises:
When equidirectional loading current, to the E type magnetic core on being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from top to bottom from the lining; To the E type magnetic core under being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from bottom to top from the lining.
3. the manufacture method of magnetic integrated inductor according to claim 1 is characterized in that, behind the described loading current, described two windings produce equidirectional in the center magnetic post of stacked up and down described two E type magnetic cores magnetic field comprises:
When equidirectional loading current, to the E type magnetic core on being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from bottom to top from the lining; To the E type magnetic core under being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from top to bottom from the lining.
4. a magnetic integrated inductor is characterized in that, comprising: two E type magnetic cores, an I type magnetic core and two windings; Described two E type magnetic cores are stacked up and down in the corresponding mode of aperture position, and described I type magnetic core is clipped in the middle of stacked up and down described two E type magnetic cores; Described two windings are respectively around the center magnetic post of stacked up and down described two E type magnetic cores; During loading current, described two windings produce the magnetic field of equidirectional in the center magnetic post of stacked up and down described two E type magnetic cores.
5. magnetic integrated inductor according to claim 4 is characterized in that, when equidirectional loading current, to the E type magnetic core on being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from top to bottom from the lining; To the E type magnetic core under being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from bottom to top from the lining.
6. magnetic integrated inductor according to claim 4 is characterized in that, when equidirectional loading current, to the E type magnetic core on being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from bottom to top from the lining; To the E type magnetic core under being stacked in, the coiling mode of the winding of its center magnetic post is for outwards carrying out coiling from top to bottom from the lining.
7. a Bridgeless power factor is corrected pfc circuit, it is characterized in that, comprise pfc converter, S1, S2, four circuit main switches of S3 and S4, two rectifier diodes of D1 and D2, and storage capacitor, first end of described pfc converter is connected in an end of power supply, second end is connected to the end of described circuit main switch S1 and the end of described circuit main switch S2, the 3rd end is connected to the end of described circuit main switch S3 and the end of described circuit main switch S4, the other end of the other end of described circuit main switch S1 and described circuit main switch S3 is connected to the negative pole of described rectifier diode D1, the other end of the other end of described circuit main switch S2 and described circuit main switch S4 is connected to the positive pole of described rectifier diode D2, one end of described storage capacitor is connected in the negative pole of described rectifier diode D1, the other end of described storage capacitor is connected in the positive pole of described rectifier diode D2, and the negative pole of the positive pole of described rectifier diode D1 and described rectifier diode D2 is connected to the other end of described power supply; Described pfc converter is each described magnetic integrated inductor of claim 4-6.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3054593A4 (en) * | 2013-11-07 | 2016-11-30 | Huawei Tech Co Ltd | Magnetic integrated device and power conversion circuit |
| US11777411B2 (en) | 2019-08-02 | 2023-10-03 | Eaton Intelligent Power Limited | Resonant power converter for wide voltage switching |
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| CN102545635B (en) * | 2012-02-09 | 2014-01-29 | 杭州电子科技大学 | Bridgeless fly-back converter with high power factor |
| CN102611315A (en) * | 2012-03-22 | 2012-07-25 | 华为技术有限公司 | Resonant switching circuit |
| CN103442538A (en) * | 2013-08-23 | 2013-12-11 | 湘潭大学 | Passive element integration method in PFC circuit |
| CN106971815B (en) * | 2016-01-14 | 2018-12-14 | 华为技术有限公司 | The power inverter of integrated inductor and the application integrated inductor |
| CN107633935A (en) * | 2016-07-18 | 2018-01-26 | 中兴通讯股份有限公司 | A kind of magnetic integrated inductor and preparation method thereof and non-bridge PFC circuits |
| CN108538552A (en) * | 2018-01-22 | 2018-09-14 | 许继电源有限公司 | A kind of magnetic core arrangement and its transformer of integrated resonant inductance |
| CN113257531A (en) * | 2021-04-27 | 2021-08-13 | 长城电源技术有限公司 | Magnetic core unit, integrated magnetic core and integrated magnetic core structure |
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| JP4472589B2 (en) * | 2005-06-28 | 2010-06-02 | スミダコーポレーション株式会社 | Magnetic element |
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| EP3054593A4 (en) * | 2013-11-07 | 2016-11-30 | Huawei Tech Co Ltd | Magnetic integrated device and power conversion circuit |
| US11777411B2 (en) | 2019-08-02 | 2023-10-03 | Eaton Intelligent Power Limited | Resonant power converter for wide voltage switching |
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