CN102510221A - Switching power supply device - Google Patents
Switching power supply device Download PDFInfo
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- CN102510221A CN102510221A CN2011103744039A CN201110374403A CN102510221A CN 102510221 A CN102510221 A CN 102510221A CN 2011103744039 A CN2011103744039 A CN 2011103744039A CN 201110374403 A CN201110374403 A CN 201110374403A CN 102510221 A CN102510221 A CN 102510221A
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- winding
- magnetic flux
- pulse signal
- center pillar
- power output
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Abstract
The embodiment of the invention discloses a switching power supply device which relates to the technical field of power supplies, and solves the problems that a switching power module occupies a large printed circuit board area, does not benefit the improvement of power density and has high cost. The invention has the technical scheme that: an output power inductor and a pulse signal transformer are integrated on the same magnetic core; and the coupling degree between an output power inductance winding and the pulse signal transformer which are arranged on the same magnetic core is 0. The embodiment of the invention is applicable to the switching power supply device.
Description
Technical field
The present invention relates to power technique fields, relate in particular to a kind of switching power unit.
Background technology
Along with the development of power technology, the power module area is more and more littler, and it is more and more that integrated magnetic is also just used.
In realizing process of the present invention, the inventor finds in the prior art, and is as shown in Figure 1; Switching power unit for transmitting drive signal comprises transformer TX1; Control Driver Circuit X1, drive signal transformer X2, drive circuit X3; Output rectification and filtering, wherein said output rectification and filtering comprise power output inductance X4 and output filter capacitor C1.The shared printed circuit board area of switch power module is big, is unfavorable for improving power density, and cost is high.
Summary of the invention
Embodiments of the invention provide a kind of switching power unit, have reduced the area of the shared printed circuit board (PCB) of switch power module, have improved power density, have reduced cost.
For achieving the above object, the present invention adopts following technical scheme:
A kind of switching power unit comprises input switch pipe, transformer, output filter capacitor, output rectifier, the objective circuit through pulse signal control and controls the control module of said objective circuit, also comprises:
Be integrated in power output inductance and pulse signal transformer on the same magnetic core;
At the power output inductance winding on the said same magnetic core and the degree of coupling between the pulse signal Transformer Winding is 0.
A kind of switching power unit that the embodiment of the invention provides; Through power output inductance and pulse signal transformer are integrated on the same magnetic core, and the degree of coupling that satisfies between power output inductance winding and the pulse signal Transformer Winding is 0, both separate work; It is big to have solved the shared printed circuit board area of switch power module; Be unfavorable for improving power density, and the high problem of cost, reduced the area of the shared printed circuit board (PCB) of switch power module; Improve power density, reduced cost.
Description of drawings
Fig. 1 is a kind of switching power unit circuit diagram that transmits drive signal in the prior art;
The primary structure figure of a kind of switching power unit that Fig. 2 provides for the embodiment of the invention one;
The circuit diagram of a kind of switching power unit that Fig. 3 provides for the embodiment of the invention one;
In a kind of switching power unit that Fig. 4 provides for the embodiment of the invention one, be integrated in power output inductance winding and pulse signal Transformer Winding exemplary plot on the same magnetic core;
In a kind of switching power unit that Fig. 5 provides for the embodiment of the invention one, be integrated in power output inductance winding and pulse signal Transformer Winding exemplary plot on the same magnetic core.
Embodiment
Below in conjunction with accompanying drawing a kind of switching power unit of the embodiment of the invention is described in detail.
Embodiment one
As shown in Figure 2; The embodiment of the invention provides a kind of switching power unit structure chart; Comprise input switch pipe, transformer, output filter capacitor, output rectifier, pass through objective circuit and controlled target circuit control module that pulse signal is controlled, specifically also comprise:
201, be integrated in power output inductance and pulse signal transformer on the same magnetic core;
202, be 0 at the power output inductance winding on the said same magnetic core and the degree of coupling between the pulse signal Transformer Winding.
A kind of switching power unit that the embodiment of the invention provides; Through power output inductance and pulse signal transformer are integrated on the same magnetic core, and the degree of coupling that satisfies between power output inductance winding and the pulse signal Transformer Winding is 0, both separate work; It is big to have solved the shared printed circuit board area of switch power module; Be unfavorable for improving power density, and the high problem of cost, reduced the area of the shared printed circuit board (PCB) of switch power module; Improve power density, reduced cost.
As shown in Figure 3; A kind of circuit diagram that transmits the switching power unit of drive signal that the embodiment of the invention provides; Switching Power Supply to transmit drive signal is an example; Comprise transformer TX1, control Driver Circuit X1, drive circuit X3, power output inductance and pulse signal transformer X4, output filter capacitor C1, also have triode Q1, Q2, Q3, wherein power output inductance and pulse signal transformer are integrated on the same magnetic core, both separate work.
As shown in Figure 4, when the integrated magnetic core of power output inductance and pulse signal transformer is the EE type, the canoe of power output inductance winding and pulse signal Transformer Winding.Wherein, winding A1-A2 is a power output inductance winding, and winding B1-B2 and winding B3-B4 are the pulse signal Transformer Winding.Winding A1-A2 is on the center pillar of magnetic core, and winding B1-B2 and winding B3-B4 are on two side columns of magnetic core.Wherein winding B1-B2 separated into two parts is left half winding B1-B12 and right half winding B12-B2, respectively on two side columns of magnetic core.
When electric current when A1 flows into A2 and flows out, can know that by the right-hand rule direction of the magnetic flux of generation on center pillar is downward; Component direction on two side columns is upwards; Can be known that by left hand rule left half winding B1-B12 is under the induction of direction for flux component upwards, the sense of current of the electromotive force of generation is to B12 by B1; And right half winding B12-B2 is under the induction of direction for flux component upwards; The sense of current of the electromotive force that produces be by B2 to B12, in the opposite direction, then the total electromotive force on winding B1-B2 is 0;
When electric current when B1 flows into B2 and flows out; Can know by the right-hand rule; The magnetic flux that left half winding B1-B12 produces makes progress at the component direction of center pillar, and the magnetic flux that right half winding B12-B2 produces is downward at the component direction of center pillar, and both cancel out each other; Be 0, then can not produce electromotive force among the winding A1-A2.
Therefore; The B1-B2 degree of coupling in power output inductance winding A1-A2 and the pulse signal Transformer Winding is 0; In like manner the B3-B4 degree of coupling in power output inductance winding A1-A2 and the pulse signal Transformer Winding also is 0, is 0 at the power output inductance winding on the said same magnetic core and the degree of coupling between the pulse signal Transformer Winding then.
And winding B1-B2 in the pulse signal Transformer Winding and winding B3-B4 are closely-coupled, on winding B1-B2, apply a voltage, and winding B3-B4 will induce an electromotive force.
As shown in Figure 5, when the integrated magnetic core of power output inductance and pulse signal transformer is the EE type, the canoe of power output inductance winding and pulse signal Transformer Winding.Wherein, winding A1-A2 is a power output inductance winding, and winding B1-B2 and winding B3-B4 are the pulse signal Transformer Winding.Winding A1-A2 is on the center pillar of magnetic core, and winding B1-B2 and winding B3-B4 are on the left side post and center pillar of magnetic core.Wherein winding B1-B2 separated into two parts is left half winding B1-B12 and right half winding B12-B2, respectively on the left side post and center pillar of magnetic core.
When electric current when A1 flows into A2 and flows out, can know that by the right-hand rule direction of the magnetic flux of generation on center pillar is downward; Component direction on the on the left side post upwards; Can be known that by left hand rule left half winding B1-B12 is under the induction of direction for flux component upwards, the sense of current of the electromotive force of generation is to B12 by B1; And right half winding B12-B2 is under the induction of downward flux component in direction; The sense of current of the electromotive force that produces be by B2 to B12, in the opposite direction, then the total electromotive force on winding B1-B2 is 0;
When electric current when B1 flows into B2 and flows out; Can know by the right-hand rule; The magnetic flux that left half winding B1-B12 produces makes progress at the component direction of center pillar, and the magnetic flux that right half winding B12-B2 produces is downward at the component direction of center pillar, and both cancel out each other; Be 0, then can not produce electromotive force among the winding A1-A2.
Therefore; The B1-B2 degree of coupling in power output inductance winding A1-A2 and the pulse signal Transformer Winding is 0; In like manner the B3-B4 degree of coupling in power output inductance winding A1-A2 and the pulse signal Transformer Winding also is 0, is 0 at the power output inductance winding on the said same magnetic core and the degree of coupling between the pulse signal Transformer Winding then.
And winding B1-B2 in the pulse signal Transformer Winding and winding B3-B4 are closely-coupled, on winding B1-B2, apply a voltage, and winding B3-B4 will induce an electromotive force.
The present invention can be applied to that any have need be in the Switching Power Supply of not transmitting pulse signal altogether between the circuit on ground; Like drive signal; Off signal etc.; When said pulse signal was drive signal, the objective circuit of said pulse signal control was a drive circuit, and the control module of controlling said objective circuit is the control Driver Circuit module; When said pulse signal was off signal, the objective circuit of said pulse signal control was a shutdown circuit, and the control module of controlling said objective circuit is control shutdown circuit module.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by said protection range with claim.
Claims (4)
1. switching power unit comprises input switch pipe, transformer, output filter capacitor, output rectifier, the objective circuit through pulse signal control and controls the control module of said objective circuit, it is characterized in that, also comprises:
Be integrated in power output inductance and pulse signal transformer on the same magnetic core;
At the power output inductance winding on the said same magnetic core and the degree of coupling between the pulse signal Transformer Winding is 0.
2. a kind of switching power unit according to claim 1; It is characterized in that; When the magnetic post of said magnetic core comprised a center pillar and two side columns, wherein said power output inductance winding was on the center pillar of said magnetic core, and said pulse signal Transformer Winding is made up of winding one and winding two; Said winding one and winding two all on two side columns, specifically comprise:
When electric current during through said power output inductance winding, said power output inductance winding produces magnetic flux on said two side columns, is wrapped in two windings one on the side column and winding two and is 0 by the electromotive force of said flux of magnetic induction;
When electric current through said winding for the moment, said winding one produces magnetic flux one on a side column, generation magnetic flux two on another side column, said magnetic flux one is opposite with the component direction of magnetic flux two on said center pillar;
When electric current during through said winding two, said winding two produces magnetic flux three on a side column, generation magnetic flux four on another side column, and said magnetic flux three is opposite with the component direction of magnetic flux four on said center pillar.
3. a kind of switching power unit according to claim 1; It is characterized in that; When the magnetic post of said magnetic core comprised a center pillar and two side columns, wherein said power output inductance winding was on the center pillar of said magnetic core, and said pulse signal Transformer Winding is made up of winding one and winding two; Said winding one and winding two all on a side column and center pillar, specifically comprise:
When electric current during through said power output inductance winding, said power output inductance winding produces magnetic flux on said side column and center pillar, and the winding one and the winding two that are wrapped on side column and the center pillar are 0 by the electromotive force of said flux of magnetic induction;
When electric current through said winding for the moment, said winding one produces magnetic flux five on side column, generation magnetic flux six on center pillar, said magnetic flux five is opposite with the component direction of magnetic flux six on said center pillar;
When electric current during through said winding two, said winding two produces magnetic flux seven on a side column, generation magnetic flux eight on center pillar, and said magnetic flux seven is opposite with the component direction of magnetic flux eight on said center pillar.
4. a kind of switching power unit according to claim 1 is characterized in that, when said pulse signal was drive signal, the objective circuit of said pulse signal control was a drive circuit, and the control module of controlling said objective circuit is the control Driver Circuit module; When said pulse signal was off signal, the objective circuit of said pulse signal control was a shutdown circuit, and the control module of controlling said objective circuit is control shutdown circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103744039A CN102510221A (en) | 2011-11-22 | 2011-11-22 | Switching power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103744039A CN102510221A (en) | 2011-11-22 | 2011-11-22 | Switching power supply device |
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| Publication Number | Publication Date |
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| CN102510221A true CN102510221A (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103744039A Pending CN102510221A (en) | 2011-11-22 | 2011-11-22 | Switching power supply device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943307A (en) * | 2014-04-28 | 2014-07-23 | 华为技术有限公司 | Interleaving parallel coupling inductor and converter |
| CN110460242A (en) * | 2019-09-12 | 2019-11-15 | 台达电子企业管理（上海）有限公司 | Two-way isolated form controlled resonant converter |
| CN112260547A (en) * | 2020-10-16 | 2021-01-22 | 重庆美的制冷设备有限公司 | Power conversion circuit, circuit board and air conditioner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006286992A (en) * | 2005-03-31 | 2006-10-19 | Tdk Corp | Magnetic device and power supply apparatus |
| JP2009146955A (en) * | 2007-12-11 | 2009-07-02 | Hitachi Computer Peripherals Co Ltd | Complex reactor and power supply unit |
-
2011
- 2011-11-22 CN CN2011103744039A patent/CN102510221A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006286992A (en) * | 2005-03-31 | 2006-10-19 | Tdk Corp | Magnetic device and power supply apparatus |
| JP2009146955A (en) * | 2007-12-11 | 2009-07-02 | Hitachi Computer Peripherals Co Ltd | Complex reactor and power supply unit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943307A (en) * | 2014-04-28 | 2014-07-23 | 华为技术有限公司 | Interleaving parallel coupling inductor and converter |
| CN110460242A (en) * | 2019-09-12 | 2019-11-15 | 台达电子企业管理（上海）有限公司 | Two-way isolated form controlled resonant converter |
| CN110460242B (en) * | 2019-09-12 | 2020-11-10 | 台达电子企业管理（上海）有限公司 | Bidirectional isolation type resonant converter |
| US11626806B2 (en) | 2019-09-12 | 2023-04-11 | Delta Electronics (Shanghai) Co., Ltd. | Bidirectional isolated resonant converter with integrated resonant inductor and isolated transformer |
| CN112260547A (en) * | 2020-10-16 | 2021-01-22 | 重庆美的制冷设备有限公司 | Power conversion circuit, circuit board and air conditioner |
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Application publication date: 20120620 |