JP3851230B2 - Electromagnetic device - Google Patents

Electromagnetic device Download PDF

Info

Publication number
JP3851230B2
JP3851230B2 JP2002180533A JP2002180533A JP3851230B2 JP 3851230 B2 JP3851230 B2 JP 3851230B2 JP 2002180533 A JP2002180533 A JP 2002180533A JP 2002180533 A JP2002180533 A JP 2002180533A JP 3851230 B2 JP3851230 B2 JP 3851230B2
Authority
JP
Japan
Prior art keywords
coil
iron core
magnetic path
electromagnetic device
bobbin
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.)
Expired - Fee Related
Application number
JP2002180533A
Other languages
Japanese (ja)
Other versions
JP2004023080A (en
Inventor
英男 福元
富三 杉山
満利 佐野
Original Assignee
池田電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 池田電機株式会社 filed Critical 池田電機株式会社
Priority to JP2002180533A priority Critical patent/JP3851230B2/en
Publication of JP2004023080A publication Critical patent/JP2004023080A/en
Application granted granted Critical
Publication of JP3851230B2 publication Critical patent/JP3851230B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Insulating Of Coils (AREA)

Description

本発明は、例えば、放電灯用の安定器として用いられている電磁装置に関するものである。
【0001】
【発明の属する技術分野】
【0002】
【従来の技術】
放電灯用の安定器として用いられている電磁装置は、図5に示すように、中央磁路104と一対の外磁路105と一対の継鉄部106(106a、106b)とを有する鉄心101を備えると共に、鉄心101の中央磁路104にコイルボビン103を介して巻回されてなるコイル102とを備え、コイルボビン103は、ボビン本体107と、このボビン本体107の両端部に設けられた一対の鍔部108(108a、108b)とを有し、一対の継鉄部106(106a、106b)が外磁路105と交差するように鍔部108の外面に沿って配置され、継鉄部106bと中央磁路104との間にはギャップ109が設けられたものがある。
【0003】
このような電磁装置100は、鉄心101とコイル102との間には絶縁距離が必要であり、この絶縁距離を確保することにより、鉄心101とコイル102との絶縁がなされている。
【0004】
【発明が解決しようとする課題】
しかしながら、従来の電磁装置では、小型化のために鍔部108aの肉厚を薄くすると、特にギャップ109が設けられていない側において、継鉄部106aと外磁路105との交差部分Aと、コイル102の鍔部108a側の端部Bとの間の絶縁距離が確保できなくなり絶縁不良が発生する恐れがあった。
このため、鍔部108の肉厚を薄くして電磁装置を小型化するには限界があった。
【0005】
そこで、本発明は、上記問題点に鑑み、鉄心とコイルとの絶縁距離を増加することができ、且つ、小型化を維持できる電磁装置を提供することを目的する。
【0006】
【課題を解決するための手段】
この技術的課題を解決するための本発明の技術的手段は、中央磁路5と外磁路6と継鉄部7とを有する鉄心2を備えると共に、鉄心2の中央磁路5にコイルボビン4を介して巻回されてなるコイル3を備え、コイルボビン4は、ボビン本体11と、このボビン本体11の両端に設けられた鍔部8とを有し、継鉄部7が外磁路6と交差するように鍔部8の外面に沿って配置された電磁装置において、
前記継鉄部7と前記外磁路6との交差部分Aの内側コーナ部に、前記鉄心2とコイル3との絶縁距離を増加させるように、切り欠き凹部10が設けられ、前記鍔部8から前記切り欠き凹部10へ突出して継鉄部7側の当該切り欠き凹部10の内面を被覆する絶縁突出部14が設けられ、この絶縁突出部14と前記鉄心2が一体成形されている点にある。
【0007】
【発明の実施の形態】
以下、本発明の実施の形態を図に基づき説明する。
図1は本発明に係る電磁装置の一実施の形態を示している。この電磁装置は、例えば放電灯用の安定器として用いられている。
図1に示すように、この電磁装置1は、鉄心2と、コイル3と、コイルボビン4とを有している。
鉄心2は、T字型積層鉄心2aとC型積層鉄心2bとを略日字形に組み合わせて構成され、中央磁路5と、一対の外磁路6と、この一対の外磁路6を互いに連結する継鉄部7(7a、7b)とを有している。
【0008】
コイルボビン4は、合成樹脂等により形成され、筒状のボビン本体11と、このボビン本体11の両端部に設けられた鍔部8(8a、8b)とを有している。
ボビン本体11は、中央磁路5に外嵌されており、このボビン本体11にコイル3が巻回されている。コイル3の外周面には絶縁テープ12(絶縁シート)が設けられており、これによりコイル3は絶縁されている。この絶縁テープ12と外磁路6との間には絶縁スペース13が設けられている。
なお、コイル3の外周面に絶縁テープ12(絶縁シート)を設けることによりコイル3は絶縁されているが、コイル3はその他の材料で絶縁されていてもよい。
【0009】
継鉄部7は、コイルボビン4の鍔部8の外面に沿って設けられており、継鉄部7と外磁路6とは交差し互いに接合され、又は、一体化されている。 中央磁路5と一方の継鉄部7bとの間にはギャップ9が設けられ、他方の継鉄部7aと外磁路6とが交差している交差部分Aの内側コーナー部には、鉄心2を内側に切り欠く切り欠き凹部10が設けられている。
図1、2に示すように、この切り欠き凹部10は、鉄心2の内側面を切り欠くように凹状になっている。
【0010】
上記実施の形態よれば、切り欠き凹部10を他方の継鉄部7aと外磁路6とが交差している交差部分Aの内側コーナー部に設けたので、この交差部分Aとコイル3の鍔部8a側の端部Bとの間の絶縁距離を増加させることができ、小型化のためにコイルボビンの鍔部8aの肉厚を薄くしても、交差部分Aと端部Bとの絶縁不良を防止することができる。
したがって、交差部分Aとコイル3の鍔部8a側の端部Bとの間の絶縁距離を確保することができるので、コイルボビンの鍔部8aの肉厚を極力薄くすることが可能であり、電磁装置1を小型化することができる。
【0011】
図3は本発明に係る電磁装置の他の実施形態を示している。
この電磁装置1は、上記記載の一実施の形態と同様に内側コーナー部に切り欠き凹部10を設け、T型鉄心2aに対してコイルボビン4を一体に形成したものであり、具体的には、T型積層鉄心2aを金型に挿入し、コイルボビン4をT型積層鉄心2aと一体化できるように射出成形(インサート射出成形)したものである。その他の構成は上記記載の一実施の形態1と同様である。
このコイルボビン4には、切り欠き凹部10に突出するように絶縁突起部14が鍔部8aの端部に設けられており、この絶縁突起部14は継鉄部7a側の切り欠き凹部10の内面を被覆している。その他の構成は上記記載の一実施の形態1と同様である。
【0012】
したがって、上記記載の実施の形態と同様に交差部分Aとコイル3の鍔部8a側の端部Bとの絶縁不良を防止することができ、コイルボビンの鍔部8aの肉厚を極力薄くして電磁装置1を小型化することができる。
さらに、絶縁突起部14が継鉄部7a側の切り欠き凹部10の内面を被覆しているので、交差部分Aと端部Bとの絶縁をより効果的になすことができる。
図4は本発明に係る電磁装置の他の実施形態を示している。
上記記載の一実施の形態では、ギャップ9が設けられていない側の内側コーナー部に切り欠き凹部10が設けられていたが、この電磁装置1はギャップ9を設けている内側コーナー部にも切り欠き凹部10を設けたものである。その他の構成は上記記載の一実施の形態1と同様である。
【0013】
図4に示すように、ギャップ9を設けている内側コーナー部に切り欠き部10を設けたので、継鉄部7bと外磁路6とが交差している交差部分A(ギャップ9側)とコイル3の鍔部8b側の端部Bとの間の絶縁距離を増加させることができる。
即ち、ギャップ9の幅が薄い等によりギャップ側の交差部分Aとコイル3の鍔部8b側の端部Bとの間の絶縁距離を取ることが困難な場合においても、この絶縁距離を増加させて確保することができる。
【0014】
本発明は、上記実施の形態に限定されるものではない。
すなわち、実施の形態は、本発明の電磁装置として放電灯用の安定器を適用しているが本発明の電磁装置は、放電灯用の安定器に限定されず、本発明をトランス等その他の電磁装置に適用実施してもよい。
また、上記の実施の形態では、鉄心2をT型積層鉄心2aとC型積層鉄心2bとを組み合わせて略日形に構成していたが、例えばE型積層鉄心とI型積層鉄心を組み合わせたものやE型積層鉄心とE型積層鉄心を組み合わせたものなど、その他の鉄心を組み合わせたものでもよい。
【0015】
また、上記実施の形態では、ギャップ9を設けている電磁装置1に切り欠き凹部10を設けていたが、ギャップ9が設けられていない電磁装置にも適用実施することができる。
【0016】
【発明の効果】
本発明によれば、鉄心とコイルとの絶縁距離を増加することができ、且つ、小型化を維持できる電磁装置を提供できる。
【図面の簡単な説明】
【図1】 本発明に係る一実施の形態の電磁装置の側面図である。
【図2】 同コーナー部の詳細図である。
【図3】 本発明に係る他の実施の形態の電磁装置の側面図である。
【図4】 本発明に係る他の実施の形態の電磁装置の側面図である。
【図5】 従来の電磁装置の側面図である。
【符号の説明】
1 電磁装置
2 鉄心
3 コイル
4 コイルボビン
5 中央磁路
6 外磁路
7 継鉄部
8 鍔部
10 切り欠き凹部
A 交差部分
The present invention relates to an electromagnetic device used as a ballast for a discharge lamp, for example.
[0001]
BACKGROUND OF THE INVENTION
[0002]
[Prior art]
As shown in FIG. 5, an electromagnetic device used as a ballast for a discharge lamp includes an iron core 101 having a central magnetic path 104, a pair of outer magnetic paths 105, and a pair of yoke portions 106 (106a, 106b). And a coil 102 wound around a central magnetic path 104 of the iron core 101 via a coil bobbin 103. The coil bobbin 103 includes a bobbin main body 107 and a pair of ends provided on both ends of the bobbin main body 107. And a pair of yoke portions 106 (106a, 106b) are arranged along the outer surface of the flange portion 108 so as to intersect the outer magnetic path 105, and the yoke portion 106b Some have a gap 109 between the central magnetic path 104.
[0003]
Such an electromagnetic device 100 requires an insulation distance between the iron core 101 and the coil 102, and the iron core 101 and the coil 102 are insulated by securing this insulation distance.
[0004]
[Problems to be solved by the invention]
However, in the conventional electromagnetic device, when the thickness of the flange portion 108a is reduced in order to reduce the size, the crossing portion A between the yoke portion 106a and the outer magnetic path 105, particularly on the side where the gap 109 is not provided, The insulation distance between the end portion B of the coil 102 on the flange portion 108a side cannot be secured, and there is a possibility that insulation failure occurs.
For this reason, there is a limit in reducing the thickness of the flange 108 and reducing the size of the electromagnetic device.
[0005]
In view of the above problems, an object of the present invention is to provide an electromagnetic device capable of increasing an insulation distance between an iron core and a coil and maintaining a reduction in size.
[0006]
[Means for Solving the Problems]
The technical means of the present invention for solving this technical problem includes an iron core 2 having a central magnetic path 5, an outer magnetic path 6, and a yoke portion 7, and a coil bobbin 4 in the central magnetic path 5 of the iron core 2. The coil bobbin 4 includes a bobbin body 11 and flanges 8 provided at both ends of the bobbin body 11, and the yoke part 7 is connected to the outer magnetic path 6. In the electromagnetic device arranged along the outer surface of the flange 8 so as to intersect,
A notch recess 10 is provided in the inner corner portion of the intersection A between the yoke portion 7 and the outer magnetic path 6 so as to increase the insulation distance between the iron core 2 and the coil 3, and the flange portion 8. An insulating protrusion 14 is provided to protrude from the notch recess 10 to cover the inner surface of the notch recess 10 on the yoke 7 side, and the insulating protrusion 14 and the iron core 2 are integrally formed. is there.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of an electromagnetic device according to the present invention. This electromagnetic device is used, for example, as a ballast for a discharge lamp.
As shown in FIG. 1, the electromagnetic device 1 includes an iron core 2, a coil 3, and a coil bobbin 4.
The iron core 2 is configured by combining a T-shaped laminated iron core 2a and a C-shaped laminated iron core 2b in a substantially letter shape, and the central magnetic path 5, the pair of outer magnetic paths 6, and the pair of outer magnetic paths 6 are mutually connected. It has the yoke part 7 (7a, 7b) to connect.
[0008]
The coil bobbin 4 is formed of a synthetic resin or the like, and includes a cylindrical bobbin main body 11 and flanges 8 (8a, 8b) provided at both ends of the bobbin main body 11.
The bobbin body 11 is fitted on the central magnetic path 5, and the coil 3 is wound around the bobbin body 11. An insulating tape 12 (insulating sheet) is provided on the outer peripheral surface of the coil 3 so that the coil 3 is insulated. An insulating space 13 is provided between the insulating tape 12 and the outer magnetic path 6.
In addition, although the coil 3 is insulated by providing the insulating tape 12 (insulating sheet) on the outer peripheral surface of the coil 3, the coil 3 may be insulated with other materials.
[0009]
The yoke portion 7 is provided along the outer surface of the flange portion 8 of the coil bobbin 4, and the yoke portion 7 and the outer magnetic path 6 intersect and are joined to each other or integrated. A gap 9 is provided between the central magnetic path 5 and one yoke portion 7b, and an iron core is provided at the inner corner of the intersection A where the other yoke portion 7a and the outer magnetic path 6 intersect. A notch recess 10 is provided to cut 2 inward.
As shown in FIGS. 1 and 2, the notch recess 10 is recessed so as to cut out the inner surface of the iron core 2.
[0010]
According to the above embodiment, the notch recess 10 is provided at the inner corner of the intersection A where the other yoke portion 7a and the outer magnetic path 6 intersect. The insulation distance between the end portion B on the side of the portion 8a can be increased, and even if the thickness of the flange portion 8a of the coil bobbin is reduced for miniaturization, the insulation between the intersecting portion A and the end portion B is poor. Can be prevented.
Therefore, since the insulation distance between the crossing portion A and the end portion B on the flange portion 8a side of the coil 3 can be ensured, the thickness of the flange portion 8a of the coil bobbin can be made as thin as possible. The apparatus 1 can be reduced in size.
[0011]
FIG. 3 shows another embodiment of the electromagnetic device according to the present invention.
This electromagnetic device 1 is provided with a notch recess 10 in an inner corner portion as in the embodiment described above, and a coil bobbin 4 formed integrally with a T-type iron core 2a. Specifically, The T-type laminated iron core 2a is inserted into a mold, and the coil bobbin 4 is injection-molded (insert injection-molded) so as to be integrated with the T-type laminated iron core 2a. Other configurations are the same as those of the first embodiment described above.
The coil bobbin 4 is provided with an insulating protrusion 14 at the end of the flange 8a so as to protrude into the notch recess 10, and the insulating protrusion 14 is formed on the inner surface of the notch recess 10 on the yoke portion 7a side. Is covered. Other configurations are the same as those of the first embodiment described above.
[0012]
Therefore, as in the above-described embodiment, it is possible to prevent insulation failure between the intersection A and the end B of the coil 3 on the flange 8a side, and to reduce the thickness of the coil bobbin flange 8a as much as possible. The electromagnetic device 1 can be reduced in size.
Furthermore, since the insulating protrusion 14 covers the inner surface of the cutout recess 10 on the yoke portion 7a side, the insulation between the intersecting portion A and the end portion B can be made more effective.
FIG. 4 shows another embodiment of the electromagnetic device according to the present invention.
In the embodiment described above, the notch recess 10 is provided in the inner corner portion on the side where the gap 9 is not provided. However, the electromagnetic device 1 is also cut in the inner corner portion where the gap 9 is provided. A notch recess 10 is provided. Other configurations are the same as those of the first embodiment described above.
[0013]
As shown in FIG. 4, since the notch 10 is provided in the inner corner where the gap 9 is provided, the intersection A (gap 9 side) where the yoke 7b and the outer magnetic path 6 intersect with each other The insulation distance between the coil 3 and the end B on the flange 8b side can be increased.
That is, even when it is difficult to obtain the insulation distance between the gap-side intersection portion A and the end portion B of the coil 3 on the flange 8b side due to the narrow width of the gap 9, the insulation distance is increased. Can be secured.
[0014]
The present invention is not limited to the above embodiment.
That is, the embodiment applies a ballast for a discharge lamp as the electromagnetic device of the present invention, but the electromagnetic device of the present invention is not limited to a ballast for a discharge lamp, and the present invention is not limited to a transformer or the like. You may apply and apply to an electromagnetic device.
Moreover, in said embodiment, although the iron core 2 was comprised by the substantially N-shape combining the T-type laminated core 2a and the C-type laminated core 2b, for example, the E-type laminated core and the I-type laminated core were combined. A combination of other iron cores such as a combination of an E-type laminated iron core and an E-type laminated iron core may also be used.
[0015]
Moreover, in the said embodiment, although the notch recessed part 10 was provided in the electromagnetic device 1 in which the gap 9 was provided, it can be applied also to the electromagnetic device in which the gap 9 is not provided.
[0016]
【The invention's effect】
According to the present invention, it is possible to provide an electromagnetic device capable of increasing the insulation distance between the iron core and the coil and maintaining the miniaturization.
[Brief description of the drawings]
FIG. 1 is a side view of an electromagnetic device according to an embodiment of the present invention.
FIG. 2 is a detailed view of the corner portion.
FIG. 3 is a side view of an electromagnetic device according to another embodiment of the present invention.
FIG. 4 is a side view of an electromagnetic device according to another embodiment of the present invention.
FIG. 5 is a side view of a conventional electromagnetic device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electromagnetic device 2 Iron core 3 Coil 4 Coil bobbin 5 Central magnetic path 6 Outer magnetic path 7 yoke part 8 collar part 10 notch recessed part A crossing part

Claims (1)

中央磁路(5)と外磁路(6)と継鉄部(7)とを有する鉄心(2)を備えると共に、鉄心(2)の中央磁路(5)にコイルボビン(4)を介して巻回されてなるコイル(3)を備え、コイルボビン(4)は、ボビン本体(11)と、このボビン本体(11)の両端に設けられた鍔部(8)とを有し、継鉄部(7)が外磁路(6)と交差するように鍔部(8)の外面に沿って配置された電磁装置において、
前記継鉄部(7)と前記外磁路(6)との交差部分(A)の内側コーナ部に、前記鉄心(2)とコイル(3)との絶縁距離を増加させるように、切り欠き凹部(10)が設けられ、前記鍔部(8)から前記切り欠き凹部(10)へ突出して継鉄部7側の当該切り欠き凹部(10)の内面を被覆する絶縁突出部(14)が設けられ、この絶縁突出部(14)と前記鉄心(2)が一体成形されていることを特徴とする電磁装置。
An iron core (2) having a central magnetic path (5), an outer magnetic path (6), and a yoke part (7) is provided, and the central magnetic path (5) of the iron core (2) is connected via a coil bobbin (4). The coil bobbin (4) includes a wound coil (3), and the coil bobbin (4) includes a bobbin main body (11) and flanges (8) provided at both ends of the bobbin main body (11). In the electromagnetic device arranged along the outer surface of the flange (8) so that (7) intersects the outer magnetic path (6),
A notch is formed in the inner corner portion of the intersection (A) between the yoke portion (7) and the outer magnetic path (6) so as to increase the insulation distance between the iron core (2) and the coil (3). A recess (10) is provided , and an insulating protrusion (14) that protrudes from the flange (8) to the notch recess (10) and covers the inner surface of the notch recess (10) on the yoke 7 side. An electromagnetic device characterized in that the insulating protrusion (14) and the iron core (2) are integrally formed .
JP2002180533A 2002-06-20 2002-06-20 Electromagnetic device Expired - Fee Related JP3851230B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002180533A JP3851230B2 (en) 2002-06-20 2002-06-20 Electromagnetic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002180533A JP3851230B2 (en) 2002-06-20 2002-06-20 Electromagnetic device

Publications (2)

Publication Number Publication Date
JP2004023080A JP2004023080A (en) 2004-01-22
JP3851230B2 true JP3851230B2 (en) 2006-11-29

Family

ID=31177627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002180533A Expired - Fee Related JP3851230B2 (en) 2002-06-20 2002-06-20 Electromagnetic device

Country Status (1)

Country Link
JP (1) JP3851230B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109767939A (en) * 2019-03-12 2019-05-17 上海西埃新能源科技有限公司 A kind of external magnetic circuit folder

Also Published As

Publication number Publication date
JP2004023080A (en) 2004-01-22

Similar Documents

Publication Publication Date Title
EP1176615B1 (en) Reactor
US20170278606A1 (en) Magnetic circuit component
JP3729439B2 (en) Power transformer
JP3388577B2 (en) Surface mount type choke coil
JP3851230B2 (en) Electromagnetic device
JPH10163029A (en) Common mode choke coil
JPH11219827A (en) Coil-type inductor
JPH08138954A (en) Discharge lamp ballast
JPH10144537A (en) Small transformer
JPH07302720A (en) Transformer
JPH10149931A (en) Choke coil
JPS603564Y2 (en) ferrite magnetic core
JPWO2009041301A1 (en) Composite magnetic element
KR100275290B1 (en) Choke
JP2007294553A (en) Coil bobbin, and inductance element
JP4539643B2 (en) Split core for motor
JP2001068352A (en) Reactor
JPH0680622B2 (en) Flat coil
JP2548955Y2 (en) Power transformer
JPS62140402A (en) Spool
JP2002319514A (en) Non-contact power device
JP3586653B2 (en) Transformer, method of manufacturing and assembling method
JP2000021638A (en) Coil
JP2000124047A (en) Choke coil
JPH11307365A (en) Converter transformer

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040914

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060613

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060719

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060822

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060831

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120908

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120908

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150908

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150908

Year of fee payment: 9

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150908

Year of fee payment: 9

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees