CN102832721A - Adjusting method for coil air gap of energy taking power supply - Google Patents
Adjusting method for coil air gap of energy taking power supply Download PDFInfo
- Publication number
- CN102832721A CN102832721A CN2012103037066A CN201210303706A CN102832721A CN 102832721 A CN102832721 A CN 102832721A CN 2012103037066 A CN2012103037066 A CN 2012103037066A CN 201210303706 A CN201210303706 A CN 201210303706A CN 102832721 A CN102832721 A CN 102832721A
- Authority
- CN
- China
- Prior art keywords
- coil
- air gap
- current
- voltage
- saturation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
The invention provides an adjusting method for a coil air gap of an energy taking power supply, comprising the following steps: the cutoff current and saturation current of a coil without an air gap are obtained; the saturation current of the coil with the air gap is obtained according to the saturation current of the coil without the air gap; the input current of the primary side of the coil with the air gap is obtained; the voltage change relation of the secondary side of the coil before and after the air gap is added to the coil is obtained according to the input current, the cutoff current, and the saturation current of the coil with the air gap; the coil air gap required to be adjusted is obtained according to the target induction voltage and the voltage change relation; and the actual coil air gap of the energy taking power supply is adjusted according to the coil air gap required to be adjusted. The influence of the adjusted coil air gap of the energy taking power supply on the induction voltage can be quantitative, and the actual coil air gap of the power supply can be accurately adjusted according to the induction voltage needing to be obtained.
Description
Technical field
The present invention relates to the electromagnetic induction technical field, particularly relate to a kind of method of adjustment of getting ability power coil air gap.
Background technology
Along with the expansion of national intelligent grid work and improving constantly of transmission line electric pressure, on-line monitoring is carried out in the safe operation of power transmission line seem particularly important.Be operated in the on high-tension side various on-line monitoring systems power supplies of transmission line in order to give, need development a kind of in the high-pressure side power supply reliably steady in a long-term.
Wherein the induction energy fetching power supply is practical; It is the most promising supply power mode; In the power supply of present induction energy fetching, saturated for fear of the degree of depth of coil, added the complicated circuit of the state of regulating winding work such as control circuit, compensating circuit accordingly; Make power circuit complicated, reduce reliability.
But when the product of the monitoring system induction energy fetching power supply of reality makes an experiment, coil vibration in various degree occurring, is because coil when being in degree of depth saturation condition, and core loss increases, and causes the coil vibration.Be head it off, can reduce saturatedly increasing the electric current scope of application, but mostly just the influence of coil air gap is analyzed qualitatively do not have clear and definite method to come behind the quantitative increase coil air gap influence to induced voltage through introducing the coil air-gap reluctance; Thus, application is made troubles to induction energy fetching, in practical application, is difficult to confirm the voltage to required induction electric energy, how to adjust the power coil air gap.
Summary of the invention
The objective of the invention is to propose a kind of method of adjustment of getting ability power coil air gap, can quantitatively go out adjustment and get of the influence of the coil air gap of ability power supply,, accurately adjust power supply actual coil air gap according to the required induced voltage that obtains to induced voltage.
For achieving the above object, the technical scheme of employing is:
A kind of method of adjustment of getting ability power coil air gap comprises step:
Obtain the cut-off current and the saturation current of coil when not increasing air gap;
The saturation current of coil when not increasing air gap obtains the saturation current of coil when increasing air gap;
Obtain the input current of coil primary side when increasing air gap;
The saturation current of coil during according to input current, cut-off current and increase air gap, the change in voltage of obtaining the coil secondary side that increases coil air gap front and back concerns;
According to target induced voltage and change in voltage relation, obtain the coil air gap that needs adjustment;
According to the coil air gap of need adjustment, the actual coil air gap of ability power supply is got in adjustment.
The present invention is according to the primary side current of no air gap and the data and the relation curve of secondary side induced voltage, the cut-off current and the saturation current of coil when obtaining no air gap; And then after calculating the air gap that increases certain width, the primary side input current in different zones, the variation relation of coil secondary side induced voltage when induced voltage does not increase air gap relatively under identical input current; Therefore under the certain situation of electric current, can be according to the size that goes for voltage, thereby confirm the width of air gap that will increase; Can quantitatively go out adjustment and get of the influence of the coil air gap of ability power supply,, accurately adjust power supply actual coil air gap according to the required induced voltage that obtains to induced voltage.
Description of drawings
Fig. 1 is one embodiment of the present of invention flow chart.
Embodiment
For ease of understanding, the present invention will be described will to combine accompanying drawing below.
A kind of method of adjustment of getting ability power coil air gap please refer to Fig. 1, comprises step:
S101, the cut-off current that obtains coil when not increasing air gap and saturation current;
S102, when not increasing air gap the saturation current of coil, obtain the saturation current of coil when increasing air gap;
S103, obtain the input current of coil primary side when increasing air gap;
S104, the saturation current of coil according to input current, cut-off current and when increasing air gap obtain the change in voltage relation that increases the coil secondary side before and after the coil air gap;
S105, according to target induced voltage and change in voltage relation, obtain the coil air gap that needs adjustment;
S106, according to the coil air gap of need adjustment, adjustment get can power supply the actual coil air gap.
The present invention is according to the primary side current of no air gap and the data and the relation curve of secondary side induced voltage, the cut-off current and the saturation current of coil when obtaining no air gap; And then after calculating the air gap that increases certain width, the primary side input current in different zones, the variation relation of coil secondary side induced voltage when induced voltage does not increase air gap relatively under identical input current; Therefore under the certain situation of electric current, can be according to the size that goes for voltage, thereby confirm the width of air gap that will increase; Can quantitatively go out adjustment and get of the influence of the coil air gap of ability power supply,, accurately adjust power supply actual coil air gap according to the induced voltage that need obtain to induced voltage.
Understand the present invention for clearer, will be from setting forth with the lower part:
One, obtains the cut-off current and the saturation current of coil when not increasing air gap;
According to the primary side current of no air gap coil and the data and the relation curve of secondary side induced voltage, the cut-off current and the saturation current of coil when obtaining no air gap; During practical implementation; Can be earlier with the primary side current of no air gap coil and the data and the relation curve import system of secondary side induced voltage; Like this, in carrying out process of the present invention, just can be directly when system end obtains no air gap the cut-off current and the saturation current of coil.
The saturation current of coil when two, basis does not increase air gap, the saturation current of coil when obtaining the increase air gap;
Concrete, can comprise steps A and B;
A, according to formula
B
m=μ
0μ
FeH
mAnd μ
r=μ
0μ
FeObtain the coil relative permeability;
B, according to formula
And B
m=μ
0μ
FeH
Fe=μ
0μ
δH
δThe saturation current of coil when obtaining increasing air gap; Wherein, I
mThe saturation current of coil during for the increase air gap; B
mBe saturation induction density; H
mBe total magnetic field intensity; H
δMagnetic field intensity for the air air gap; H
FeMagnetic field intensity for iron material; l
δBe the coil gas length; l
FeBe iron circuit length; I
0Be the said saturation current of coil when not increasing air gap; N
1The first siding ring number of turn for coil; μ
FeMagnetic permeability for iron material; μ
rBe said coil relative permeability, μ
0Be permeability of vacuum; μ
δBeing the relative permeability of air, is 1.
Parameter according to the iron core of getting the ability coil is searched the operating mode table, can know the saturation induction density B of coil
m, iron core magnetic permeability μ
Fe, the lamination coefficient lambda of iron core, the cross-sectional area S of iron core, the electric current I of coil primary side input, the number of turn N of coil primary side
1, the length l of total magnetic circuit, iron circuit length l
FeThe air-gap magnetic circuit length l
δ, the line voltage frequency f; Second siding ring number of turn N
2When being in the saturation region, magnetic flux density is definite value, i.e. B
m=1.25T (Si Tela), μ
δ=1.
Three, obtain the input current of coil primary side when increasing air gap;
The input current of coil primary side when increasing air gap, system can obtain through survey tool.
The saturation current of coil during four, according to input current, cut-off current and increase air gap, the change in voltage of obtaining the coil secondary side that increases coil air gap front and back concerns;
The present invention will be from linear zone, three zoness of different in saturation region and saturation region gradually, obtain the coil secondary side induced voltage that increases behind the air gap, the variation relation of coil secondary side induced voltage when under identical input current, not increasing air gap relatively; Concrete, comprise step:
C, according to formula
coil secondary side voltage saturation value when obtaining increasing air gap;
D, when input current during less than cut-off current, that is, and when being in linear zone,
Obtain the voltage change of coil secondary side according to formula
:
E, be greater than or equal to cut-off current when input current, and when increasing air gap during the saturation current of coil, that is, and when being in gradually the saturation region;
Obtain the change in voltage scope of coil secondary side according to formula
;
F, when input current is greater than or equal to the saturation current of coil when increasing air gap, that is, and when being in the saturation region;
Obtain the voltage change of coil secondary side according to formula Δ U=U; When being in the saturation region, the voltage change of coil secondary side is a definite value.
Wherein, U=U
0-U
2U
2Coil secondary side voltage saturation value during for the increase air gap; Δ U is the voltage change of coil secondary side; F is the current electric voltage frequency of electrical network; N
2The second siding ring number of turn for coil; S is the cross-sectional area of iron core; λ is the lamination coefficient of iron core; I
1Be cut-off current; I is an input current; L is the total length of magnetic path of coil; U
0Be no air gap secondary side voltage saturation value.
Five, according to target induced voltage and change in voltage relation, obtain the coil air gap that needs adjustment;
Can obtain by step 4; When increasing the coil air gap; The variation of the induced voltage that the coil secondary side is corresponding; Thereby the change in voltage relation that obtains in coil secondary side induced voltage and the step 4 when size of the target induced voltage that can obtain according to need, no coil air gap, can obtain needs adjustment coil air gap value.
The obtaining of coil secondary side induced voltage when not increasing the coil air gap, those skilled in the art can obtain according to relevant parameter.
Six, according to the coil air gap of need adjustment, the actual coil air gap of ability power supply is got in adjustment.
System adjusts coil air gap value according to need, and the actual coil air gap of ability power supply is got in adjustment, thereby makes that getting the ability power supply exports the voltage that conforms to the target induced voltage.
The above embodiment has only expressed several kinds of execution modes of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with accompanying claims.
Claims (3)
1. a method of adjustment of getting ability power coil air gap is characterized in that, comprises step:
Obtain the cut-off current and the saturation current of coil when not increasing air gap;
According to the said saturation current of coil when not increasing air gap, obtain the saturation current of coil when increasing air gap;
Obtain the input current of coil primary side when increasing air gap;
The saturation current of coil during according to said input current, said cut-off current and said increase air gap, the change in voltage of obtaining the coil secondary side that increases coil air gap front and back concerns;
According to target induced voltage and said change in voltage relation, obtain the coil air gap that needs adjustment;
According to the said coil air gap that needs adjustment, the actual coil air gap of ability power supply is got in adjustment.
2. method of adjustment of getting ability power coil air gap according to claim 1 is characterized in that, the saturation current of coil when said basis does not increase air gap, and the step of obtaining the saturation current of coil when increasing air gap comprises:
According to formula
B
m=μ
0μ
FeH
mAnd μ
r=μ
0μ
FeObtain the coil relative permeability;
According to formula
And B
m=μ
0μ
FeH
Fe=μ
0μ
δH
δThe saturation current of coil when obtaining increasing air gap; Wherein, I
mThe saturation current of coil during for said increase air gap; B
mBe saturation induction density; H
mBe total magnetic field intensity; H
δMagnetic field intensity for the air air gap; H
FeMagnetic field intensity for iron material; l
δBe the coil gas length; l
FeBe iron circuit length; I
0Be the said saturation current of coil when not increasing air gap; N
1The first siding ring number of turn for coil; μ
FeMagnetic permeability for iron material; μ
rBe said coil relative permeability, μ
0Be permeability of vacuum; μ
δRelative permeability for air.
3. method of adjustment of getting ability power coil air gap according to claim 1 and 2; It is characterized in that; The said saturation current of coil according to input current, cut-off current and when increasing air gap obtains the step that increases behind the coil air gap with respect to for the coil secondary side change in voltage relation that increases the coil air gap and is specially;
According to formula
coil secondary side voltage saturation value when obtaining increasing air gap;
When said input current during, obtain the voltage change of coil secondary side according to formula
less than said cut-off current:
When said input current is greater than or equal to said cut-off current; And during the saturation current of coil, obtain the change in voltage scope of coil secondary side according to formula
during less than said increase air gap;
, said input current during the saturation current of coil, obtains the voltage change of coil secondary side according to formula Δ U=U when being greater than or equal to said increase air gap;
Wherein, U=U
0-U
2U
2Coil secondary side voltage saturation value during for said increase air gap; Δ U is the voltage change of coil secondary side; F is the current electric voltage frequency of electrical network; N
2The second siding ring number of turn for coil; S is the cross-sectional area of iron core; λ is the lamination coefficient of iron core; I
1Be said cut-off current; I is said input current; L is the total length of magnetic path of coil; U
0Be no air gap secondary side voltage saturation value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210303706.6A CN102832721B (en) | 2012-08-23 | 2012-08-23 | Adjusting method for coil air gap of energy taking power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210303706.6A CN102832721B (en) | 2012-08-23 | 2012-08-23 | Adjusting method for coil air gap of energy taking power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102832721A true CN102832721A (en) | 2012-12-19 |
| CN102832721B CN102832721B (en) | 2015-03-18 |
Family
ID=47335735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210303706.6A Active CN102832721B (en) | 2012-08-23 | 2012-08-23 | Adjusting method for coil air gap of energy taking power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102832721B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542871A (en) * | 2019-10-10 | 2019-12-06 | 华北电力大学 | magnetic characteristic measurement system and method for magnetic material |
| CN110784024A (en) * | 2018-07-30 | 2020-02-11 | E.G.O.电气设备制造股份有限公司 | Method and device for inductively transmitting energy |
| CN117856465A (en) * | 2024-01-11 | 2024-04-09 | 国网上海市电力公司 | Intelligent cable safe energy taking device and method based on changing air gap distance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007124890A (en) * | 2005-10-24 | 2007-05-17 | Samsung Electronics Co Ltd | Device and method for wirelessly sharing power supply source by induction system |
| CN101814775A (en) * | 2010-04-14 | 2010-08-25 | 武汉大学 | Parameter matching method for induction power-taking device for overhead high-voltage transmission line |
| CN202150743U (en) * | 2011-07-01 | 2012-02-22 | 广东电网公司电力科学研究院 | Coupling energy taking power supply system for high voltage transmission line fault monitoring |
-
2012
- 2012-08-23 CN CN201210303706.6A patent/CN102832721B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007124890A (en) * | 2005-10-24 | 2007-05-17 | Samsung Electronics Co Ltd | Device and method for wirelessly sharing power supply source by induction system |
| CN101814775A (en) * | 2010-04-14 | 2010-08-25 | 武汉大学 | Parameter matching method for induction power-taking device for overhead high-voltage transmission line |
| CN202150743U (en) * | 2011-07-01 | 2012-02-22 | 广东电网公司电力科学研究院 | Coupling energy taking power supply system for high voltage transmission line fault monitoring |
Non-Patent Citations (3)
| Title |
|---|
| 李志先等: "输电线路状态监测***取能电源的设计新原理", 《电力***自动化》 * |
| 王赞等: "输电线高电位取能电源的研制", 《电网与清洁能源》 * |
| 龚贤夫等: "一种输电线路大功率取能电源的设计", 《电力***保护与控制》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110784024A (en) * | 2018-07-30 | 2020-02-11 | E.G.O.电气设备制造股份有限公司 | Method and device for inductively transmitting energy |
| CN110784024B (en) * | 2018-07-30 | 2024-07-05 | E.G.O.电气设备制造股份有限公司 | Method and device for inductively transmitting energy |
| CN110542871A (en) * | 2019-10-10 | 2019-12-06 | 华北电力大学 | magnetic characteristic measurement system and method for magnetic material |
| CN117856465A (en) * | 2024-01-11 | 2024-04-09 | 国网上海市电力公司 | Intelligent cable safe energy taking device and method based on changing air gap distance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102832721B (en) | 2015-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106772152B (en) | A kind of measurement method of transformer core remanent magnetism | |
| DE602006003226D1 (en) | METHOD AND DEVICE FOR FEEDING A MAGNETIC COUPLER | |
| CN102985838A (en) | Method and apparatus for detecting a magnetic characteristic variable in a core | |
| GB201312256D0 (en) | Method and apparatus for a half-bridge variable differential transformer position sensing system | |
| WO2014003730A8 (en) | Variable magnetic flux-type rotary electric machine | |
| EP1879037B8 (en) | Device and method for measuring a current flowing in an electrical conductor | |
| CN102832721A (en) | Adjusting method for coil air gap of energy taking power supply | |
| CN106298218A (en) | A kind of rectangle amorphous nano-crystalline magnetic core and preparation method thereof | |
| CN105490600A (en) | Generator excitation system and parameter design method and system thereof | |
| Potgieter et al. | Effects observed in the characterization of soft magnetic composite for high frequency, high flux density applications | |
| US20180259566A1 (en) | Measurement method for determining iron losses | |
| CN103545963A (en) | Stator end electric shielding structure of synchronous generator | |
| MX2013006173A (en) | Electromagnetic generator and method of using same. | |
| WO2018130872A3 (en) | Harmoncis filters using semi non-magnetic bobbins | |
| Pokharel et al. | Analytical modeling of a ferromagnetic core reactor | |
| JP2010257894A (en) | Induction heating device for metal plate | |
| EP2838093B1 (en) | Transformer core flux control for power management | |
| CN110596480A (en) | Excitation signal injection-based transformer direct-current magnetic bias detection system and detection method thereof | |
| CN201984925U (en) | High-power pulse transformer | |
| Jeong et al. | Comparison of iron loss at different manufacturing process of actual stator core | |
| MX2018015695A (en) | Inductor. | |
| CN205074682U (en) | Numerical control optic fibre laser cutting machine's cutting gas pressure regulator | |
| CN105979463B (en) | Automatic magnetization testing equipment for program-controlled telephone receiver | |
| CN109936171A (en) | A kind of operation Gan Kang carrier general branch current monitoring high-voltage end energy supplying system | |
| CN106505640B (en) | Breaker, power supply unit and method of supplying power to |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |