CN108225165A - A kind of computational methods of reactor air gap thickness - Google Patents
A kind of computational methods of reactor air gap thickness Download PDFInfo
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- CN108225165A CN108225165A CN201710401360.6A CN201710401360A CN108225165A CN 108225165 A CN108225165 A CN 108225165A CN 201710401360 A CN201710401360 A CN 201710401360A CN 108225165 A CN108225165 A CN 108225165A
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- Prior art keywords
- iron core
- core column
- air gap
- leakage
- magnetic flux
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
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- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a kind of computational methods of reactor air gap thickness, including：Air-gap area S is surrounded across coil inner wall to iron core column periphery according to leakage magnetic flux1, and leakage magnetic flux pass through coil body area S2, obtain leakage field total effective area Aσ；With reference to above-mentioned steps, according to leakage inductance formula：Lσ=μ0AσN2/ h and main inductance formula：Lm=μ0AsN2/ δ, and then calculate air gap overall thickness δ.The present invention surrounds air-gap area across coil inner wall to iron core column periphery according to leakage magnetic flux and leakage magnetic flux passes through coil body area, obtains leakage field total effective area；Then total inductance amount is obtained further according to leakage inductance formula and main inductance formula, and then calculates air gap overall thickness.The present invention accurately provides air gap thickness, labor and material saving by Precise spraying.
Description
Technical field
The present invention relates to reactor technical field more particularly to a kind of computational methods of reactor air gap thickness.
Background technology
The design of conventional reactor, it is relatively thicker since the calculating of its air gap does not consider that leakage magnetic flux brings the influence of leakage inductance
It is rough, not careful enough, meet the inductance value of the margin of tolerance in order to obtain, cause reactor assembler spent more time filled tear open,
It strips and reassembles, the thickness for breath plate of doing over again, until inductance value test passes, waste material is taken a lot of work again.According to statistics, leakage inductance accounts for visitor
The ratio of family general requirements inductance value is about 1.5%~20%, and the accuracy tolerance of inductance value is generally 5%, i.e. leakage inductance accounting
Phenomenon of doing over again can be all generated in 5%~20% reactor production process.
Invention content
For the above-mentioned prior art the shortcomings that, the object of the present invention is to provide a kind of labor and material savings, can accurately provide electricity
Anti- device air gap thickness computational methods.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of computational methods of reactor air gap thickness, this method comprises the following steps：
Step 1：Air-gap area S is surrounded across coil inner wall to iron core column periphery according to leakage magnetic flux1And leakage field
Lead to across coil body area S2, obtain leakage field total effective area Aσ；
Step 2：With reference to above-mentioned steps, according to leakage inductance formula：Lσ=μ0AσN2/ h and main inductance formula：Lm=μ0AsN2/ δ, and main inductance amount Lm=L-Lσ(L is the inductance value of customer requirement), and then calculate air gap overall thickness δ；
Wherein, μ in above formula0It is air permeability, is constant；AsIt is iron core column effective sectional area；N is the coiling number of turn；δ is
Air gap overall thickness.
Before the step 1, further include：Default coil-winding thickness is d, and iron core column width is A, a length of B of iron core column,
In width direction, coil inner wall is to being divided into a between iron core column, and in length direction, coil inner wall is to being divided into b, center line between iron core column
Circle carries out coiling, winding height h along iron core column short transverse.
The leakage magnetic flux surrounds air-gap area S across coil inner wall to iron core column periphery1=2b (A+2a)+2aB；Institute
Leakage magnetic flux is stated across coil body area S2=2d (A+2a+2d)+2d (B+2b)；The leakage field total effective area Aσ=S1+S2。
The main inductance amount Lm=L-Lσ, wherein, L is total inductance amount.
The air gap overall thickness δ=μ0AsN2/(L-Lσ)。
Compared with prior art, the present invention surrounds air-gap face according to leakage magnetic flux across coil inner wall to iron core column periphery
Product and leakage magnetic flux pass through coil body area, obtain leakage field total effective area；Then further according to leakage inductance formula and main electricity
Sense formula obtains total inductance amount, and then calculate air gap overall thickness.The present invention accurately provides air gap thickness by Precise spraying
Degree, labor and material saving.
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to attached drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1：Reactor circuit schematic diagram of the present invention；
Fig. 2：Reactor air gap thickness computational methods flow chart of the present invention；
Fig. 3：Iron core column of the present invention and coil position relation schematic diagram.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing into
It is described in detail to one step, it is clear that the described embodiments are only some of the embodiments of the present invention rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
All other embodiment, shall fall within the protection scope of the present invention.
The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.
As shown in Figure 1, a kind of reactor provided by the invention, including：Iron core column, coil, storage reactor magnetic energy the
One air gap and interstice, the coil winding is in iron core column, the edge magnetic force of first air gap and interstice
Line injects iron core column in semicircular fashion.The edge magnetic line of force of first air gap and interstice is closed back by air formation
The leakage magnetic flux on road.
In implementation, coil is wound in iron core column of the present invention, the number of turn is N circles, and iron core column sectional area is As, the first air gap
(center air gap) thickness is δ1, interstice (lower section air gap) thickness is δ2, the magnetic energy major storage of reactor is at air gap, electricity
Sensibility reciprocal L is mainly obtained by air gap thickness.Main flux is φm(line of force of edge magnetic containing air gap injects iron core column in semicircular fashion
Edge flux φδ1、φδ2), what in addition also many people easily ignored forms closed circuit by air (being not passed through iron core column)
Leakage magnetic flux φσ。
Preferably, iron core column of the present invention is placed on coil middle position.The coil along iron core column short transverse into
Row coiling.
Preferably, the first air gap of the present invention and interstice by epoxy plate or insulation paper washer into.In implementation, air gap one
As with heat safe epoxy plate or insulation paper washer into.
As shown in Fig. 2, a kind of reactor air gap thickness computational methods provided by the invention, this method comprises the following steps：
Step 1：Air-gap area S is surrounded across coil inner wall to iron core column periphery according to leakage magnetic flux1And leakage field
Lead to across coil body area S2, obtain leakage field total effective area Aσ；
Step 2：With reference to above-mentioned steps, according to leakage inductance formula：Lσ=μ0AσN2/ h and main inductance formula：Lm=μ0AsN2/ δ, and main inductance amount Lm=L-Lσ(L is the inductance value of customer requirement), and then calculate air gap overall thickness δ；
Wherein, μ in above formula0It is air permeability, is constant；AsIt is iron core column effective sectional area；N is the coiling number of turn；δ is
Air gap overall thickness.
Before above-mentioned steps one, as shown in figure 3, iron core column is placed on coil middle position, default coil-winding thickness is
D, iron core column width are A, a length of B of iron core column, and in width direction, coil inner wall is to a is divided between iron core column, in length direction, coil
Inner wall carries out coiling, winding height h to b, coil is divided between iron core column along iron core column short transverse.
The leakage magnetic flux surrounds air-gap area S across coil inner wall to iron core column periphery1=2b (A+2a)+2aB；Institute
Leakage magnetic flux is stated across coil body area S2=2d (A+2a+2d)+2d (B+2b)；The leakage field total effective area Aσ=S1+S2。
The main inductance amount Lm=L-Lσ, wherein, L is total inductance amount.Optionally, L is the inductance value for selecting customer requirement.
With reference to above-mentioned steps two, the air gap overall thickness δ=μ0AsN2/(L-Lσ).Preferably, can suitably divide further according to δ values
With δ1With δ2, can be more accurate.
To sum up, the present invention surrounds air-gap area and leakage according to leakage magnetic flux across coil inner wall to iron core column periphery
Magnetic flux passes through coil body area, obtains leakage field total effective area；Then it is obtained further according to leakage inductance formula and main inductance formula
To total inductance amount, and then calculate air gap overall thickness.The present invention accurately provides air gap thickness, saving of labor saves by Precise spraying
Material.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (5)
1. a kind of computational methods of reactor air gap thickness, which is characterized in that this method comprises the following steps：
Step 1：Air-gap area S is surrounded across coil inner wall to iron core column periphery according to leakage magnetic flux1And leakage magnetic flux passes through
Coil body area S2, obtain leakage field total effective area Aσ；
Step 2：With reference to above-mentioned steps, according to leakage inductance formula：Lσ=μ0AσN2/ h and main inductance formula：Lm=μ0AsN2/ δ,
Main inductance amount L againm=L-Lσ(L is the inductance value of customer requirement), and then calculate air gap overall thickness δ；
Wherein, μ in above formula0It is air permeability, is constant；AsIt is iron core column effective sectional area；N is the coiling number of turn；δ is air gap
Overall thickness=δ1+δ2。
2. according to the method described in claim 1, it is characterized in that：Before the step 1, further include：Default coil-winding
Thickness is d, and iron core column width is A, and a length of B of iron core column, in width direction, coil inner wall is to a is divided between iron core column, in length side
To coil inner wall carries out coiling, winding height h to b, coil is divided between iron core column along iron core column short transverse.
3. according to the method described in claim 2, it is characterized in that：The leakage magnetic flux passes through coil inner wall to iron core column periphery institute
Surround air-gap area S1=2b (A+2a)+2aB；The leakage magnetic flux passes through coil body area S2=2d (A+2a+2d)+2d (B+
2b)；The leakage field total effective area Aσ=S1+S2。
4. according to the method described in claim 1, it is characterized in that：The main inductance amount Lm=L-Lσ, wherein, L is total inductance
Amount.
5. according to the method described in claim 4, it is characterized in that：The air gap overall thickness δ=μ0AsN2/(L-Lσ)。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710401360.6A CN108225165A (en) | 2017-05-31 | 2017-05-31 | A kind of computational methods of reactor air gap thickness |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710401360.6A CN108225165A (en) | 2017-05-31 | 2017-05-31 | A kind of computational methods of reactor air gap thickness |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110033936A (en) * | 2019-05-14 | 2019-07-19 | 云南电网有限责任公司电力科学研究院 | A kind of compound ground connection arc |
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| CN101714450A (en) * | 2009-12-23 | 2010-05-26 | 中国电力科学研究院 | Electrical design method of saturable reactor for direct current converter valve |
| CN201725661U (en) * | 2010-01-22 | 2011-01-26 | 焦海波 | Reactor core with ferro-silicon aluminum as air gap |
| CN103956259A (en) * | 2014-04-18 | 2014-07-30 | 江苏南瑞帕威尔电气有限公司 | Reactor design method based on visualization algorithm |
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2017
- 2017-05-31 CN CN201710401360.6A patent/CN108225165A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714450A (en) * | 2009-12-23 | 2010-05-26 | 中国电力科学研究院 | Electrical design method of saturable reactor for direct current converter valve |
| CN201725661U (en) * | 2010-01-22 | 2011-01-26 | 焦海波 | Reactor core with ferro-silicon aluminum as air gap |
| CN103956259A (en) * | 2014-04-18 | 2014-07-30 | 江苏南瑞帕威尔电气有限公司 | Reactor design method based on visualization algorithm |
Non-Patent Citations (2)
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| CN110033936A (en) * | 2019-05-14 | 2019-07-19 | 云南电网有限责任公司电力科学研究院 | A kind of compound ground connection arc |
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