JP2657968B2 - Electromagnetic coil - Google Patents
Electromagnetic coilInfo
- Publication number
- JP2657968B2 JP2657968B2 JP63242292A JP24229288A JP2657968B2 JP 2657968 B2 JP2657968 B2 JP 2657968B2 JP 63242292 A JP63242292 A JP 63242292A JP 24229288 A JP24229288 A JP 24229288A JP 2657968 B2 JP2657968 B2 JP 2657968B2
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic coil
- winding
- iron core
- magnetic
- field
- 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
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、電磁コイルに係り、特に電動機や発電機
の界磁に応用して、界磁損を極めて低減し得ると共に、
電気−機械エネルギーの変換効率を著しく増大すること
ができる電磁コイルの改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electromagnetic coil, and particularly to a magnetic field of an electric motor or a generator, which can greatly reduce field loss,
The present invention relates to an improvement in an electromagnetic coil capable of significantly increasing the conversion efficiency of electro-mechanical energy.
一般に、電磁コイルは、磁性体からなる鉄心に巻線を
施した構成からなる。この種の電磁コイルは、一般に電
磁スイッチや電磁弁の操作手段として、また電動機や発
電機の動力伝達手段として広く応用されている。また、
電磁コイルは、高磁力を出力するために、高透磁率の磁
性体からなる鉄心を使用し、この鉄心の外周にコイルを
多層巻きにすることが要求される。Generally, an electromagnetic coil has a configuration in which a winding is applied to an iron core made of a magnetic material. This kind of electromagnetic coil is widely applied as a means for operating an electromagnetic switch or a solenoid valve, and also as a power transmission means for a motor or a generator. Also,
In order to output a high magnetic force, an electromagnetic coil is required to use an iron core made of a magnetic material having a high magnetic permeability, and to form a multilayer winding around the outer periphery of the iron core.
しかるに、前述した構成からなる高磁力の電磁コイル
を応用して、これを電動機または発電機の界磁として構
成した場合、回転子の極性に従ってその内部に発生する
磁束が、界磁巻線と鎖交し、これがフレミングの法則に
よって、前記界磁巻線を流れる電流に対し、同方向また
は逆方向の逆起電圧を発生し、界磁巻線電流を変動させ
る等の悪影響を及ぼす。特に、高磁場の出力を得るもの
では、巻線の巻回数も多くなり、構造も大形化して、前
述した逆起電圧による悪影響を受け易くなる難点があ
る。However, when the high-magnetism electromagnetic coil having the above-described configuration is applied to form a magnetic field of a motor or a generator, the magnetic flux generated inside the rotor in accordance with the polarity of the rotor is linked to the field winding and the chain. In accordance with Fleming's law, this generates a counter electromotive voltage in the same or opposite direction with respect to the current flowing through the field winding, and has an adverse effect such as fluctuating the field winding current. In particular, in the case of obtaining an output of a high magnetic field, the number of turns of the winding is increased, and the structure is increased in size.
そこで、本発明の目的は、所定の鉄心に巻着する巻線
の巻回構造を改良することにより、巻線の流れる電流に
対する磁気的遮蔽を有効に達成して、外部磁界の影響を
受けることなく、常に安定した高磁場を得ることができ
る電動機または発電機の界磁巻線として好適な電磁コイ
ルを提供することにある。Accordingly, an object of the present invention is to improve the winding structure of a winding wound around a predetermined iron core, thereby effectively achieving magnetic shielding for a current flowing through the winding, and being affected by an external magnetic field. It is another object of the present invention to provide an electromagnetic coil suitable as a field winding of a motor or a generator that can always obtain a stable high magnetic field.
前記目的を達成するため、本発明に係る電磁コイル
は、軟質磁性材料からなる鉄心に巻線を多層に巻着して
なる電動機または発電機の界磁用の電磁コイルにおい
て、前記巻線の各層間にそれぞれ軟質磁性材料からなる
短冊状の磁性板を鉄心の軸方向と平行に前記巻線と密接
して配置すると共に、前記磁性板の厚さをそれぞれ鉄心
から離反するに従い順次肉薄となるように変化させて配
置することを特徴とする。In order to achieve the above object, an electromagnetic coil according to the present invention is a magnetic field coil for a motor or a generator in which a winding is wound around an iron core made of a soft magnetic material in multiple layers. A strip-shaped magnetic plate made of a soft magnetic material is disposed between the layers in close contact with the windings in parallel with the axial direction of the iron core, and the thickness of the magnetic plate is sequentially reduced as the distance from the iron core increases. It is characterized by being arranged while being changed to.
本発明に係る電磁コイルによれば、軟質磁性材料から
なる鉄心に巻線を多層に巻着してなる電動機または発電
機の界磁用の電磁コイルにおいて、前記巻線の各層間に
軟質磁性材料からなる磁性板を配置することにより、一
方では、各巻線が磁性板と接触ないし近接する割合が大
幅に増大して高磁場を発生し得ると共に、高インダクタ
ンスの電磁コイルとすることができる。また、他方にお
いては、前記磁性板が、外部磁束に対してこれを容易に
透過させることができ、巻線に流れる電流に対し鎖交し
て巻線電流の低減を生じさせる逆起電圧の発生を抑制す
ることができる。従って、前記外部磁束が次第に低減さ
れる鉄心から離反する方向においては、前記磁性板の厚
さを順次肉薄となるように変化させることにより、巻線
電流の流れを良好にして、電磁コイルの巻線部に生じる
磁束の流れを調整し、電磁コイルの界磁特性が所望の特
性となるよう容易に設計することが可能となる。ADVANTAGE OF THE INVENTION According to the electromagnetic coil which concerns on this invention, in the electromagnetic coil for fields of a motor or a generator which winds a winding in multiple layers around the iron core which consists of a soft magnetic material, the soft magnetic material between each layer of the said winding On the other hand, by arranging a magnetic plate made of the above, on the other hand, the ratio of each winding contacting or approaching the magnetic plate is greatly increased, and a high magnetic field can be generated, and an electromagnetic coil with high inductance can be obtained. On the other hand, on the other hand, the magnetic plate can easily transmit this to an external magnetic flux, and generates a back electromotive voltage which causes a reduction in the winding current by interlinking the current flowing in the winding. Can be suppressed. Therefore, in the direction away from the iron core where the external magnetic flux is gradually reduced, the thickness of the magnetic plate is sequentially changed so as to become thinner, so that the flow of the winding current is improved and the winding of the electromagnetic coil is improved. By adjusting the flow of the magnetic flux generated in the wire portion, it is possible to easily design the field characteristics of the electromagnetic coil to have desired characteristics.
次に、本発明に係る電磁コイルの実施例につき、添付
図面を参照しながら以下詳細に説明する。Next, embodiments of the electromagnetic coil according to the present invention will be described in detail below with reference to the accompanying drawings.
第１図および第２図は、本発明に係る電磁コイルの基
本構成を示すものである。すなわち、第１図および第２
図のおいて、参照符号10は軟質磁性材料からなる鉄心を
示し、この鉄心10の頸部10aに、その内方から順次多層
に巻線12を巻着する。この場合、巻線12の各層間に軟質
磁性材料からなる短冊状の磁性板14を介在させた構成か
らなる。1 and 2 show a basic configuration of an electromagnetic coil according to the present invention. 1 and 2
In the drawing, reference numeral 10 denotes an iron core made of a soft magnetic material, and a winding 12 is wound around the neck 10a of the iron core 10 in order from the inside in a multilayer manner. In this case, the structure is such that a strip-shaped magnetic plate 14 made of a soft magnetic material is interposed between the layers of the winding 12.
このように構成した電磁コイルは、鉄心10に巻着され
る各層の巻線12が、磁性板14とそれぞれ隣接するため、
従来の多層に巻着した場合と比べて、磁性材料と接触な
いし近接する割合が多くなり、巻線12を同一巻数とした
場合に、従来の電磁コイルに比べて高磁場が得られると
共に、高インダクタンスの電磁コイルを得ることができ
る。In the electromagnetic coil configured as described above, the windings 12 of each layer wound around the iron core 10 are adjacent to the magnetic plate 14, respectively.
Compared to the conventional case of winding on a multilayer, the ratio of contact with or close to the magnetic material increases, and when the windings 12 have the same number of turns, a high magnetic field can be obtained as compared with the conventional electromagnetic coil, and a high magnetic field can be obtained. An electromagnetic coil having an inductance can be obtained.
また、この電磁コイルは、それぞれ外部的磁束φ１ま
たはφ２が、それぞれ図示の方向に影響を与えるものと
すれば、これら磁束は前記巻線12の各層間に配置した磁
性板14を透過して、各巻線12の鎖交が殆ど回避されるた
め、巻線に流れる電流に対し、同方向または逆方向の逆
起電圧を発生して巻線電流を変動させるような、悪影響
を防止することができる。なお、この点に関しては、後
に詳述する。Further, the electromagnetic coil is externally flux phi 1 or phi 2 respectively, if that influence the direction of the illustrated respectively, which flux is transmitted through the magnetic plate 14 disposed between each layer of the winding 12 Therefore, since the interlinkage of each winding 12 is almost avoided, it is necessary to prevent adverse effects such as generating a counter electromotive voltage in the same direction or in the opposite direction to the current flowing in the winding to fluctuate the winding current. Can be. This point will be described later in detail.
第３図は、第１図に示す電磁コイルの変形例を示すも
のであって、鉄心10の頸部10aに巻着する巻線12の構造
につき、第４図に示すように、予め導線12aの外周を軟
質磁性材料からなる磁性板12bで被覆し、断面が矩形状
となるように構成した電磁コイルを示すものである。こ
のように構成した磁性板による被覆導線12を使用するこ
とにより、巻線12の巻着と同時に各層間における磁性板
の形成を容易に達成することができると共に、前記第１
図および第２図に示す電磁コイルと同様に、高磁場の形
成と逆起電圧による巻線電流への悪影響の防止とを達成
することができる。FIG. 3 shows a modification of the electromagnetic coil shown in FIG. 1, and shows a structure of a winding 12 wound around a neck 10a of an iron core 10 as shown in FIG. 1 shows an electromagnetic coil in which the outer periphery of the electromagnetic coil is covered with a magnetic plate 12b made of a soft magnetic material, and has a rectangular cross section. By using the coated conductive wire 12 made of the magnetic plate configured as described above, the formation of the magnetic plate between the respective layers can be easily achieved simultaneously with the winding of the winding 12 and the first
As in the case of the electromagnetic coil shown in FIG. 2 and FIG. 2, formation of a high magnetic field and prevention of adverse effects on the winding current due to the back electromotive force can be achieved.
第５図は、前記電磁コイルのさらに変形例を示すもの
であって、軟質磁性材料による磁性板等の形成を予め行
うことなく、鉄心10の頸部10aに対する巻線12の巻着
を、各層毎に若干離間させて行い、その後前記巻線12の
間隙部分に軟質材料からなる磁性粉末16を、接着性固化
剤と共に充填して固定した電磁コイルを示すものであ
る。このように構成することによっても、前述した電磁
コイルと同様に、高磁場の形成と逆起電圧による巻線電
流への悪影響の防止とを達成することができる。FIG. 5 shows a further modification of the electromagnetic coil, in which the winding of the winding 12 around the neck 10a of the iron core 10 is performed without forming a magnetic plate or the like of a soft magnetic material in advance. This shows an electromagnetic coil in which a magnetic powder 16 made of a soft material is filled and fixed together with an adhesive solidifying agent in a gap portion of the winding 12 after being slightly separated from each other. With this configuration as well, similarly to the above-described electromagnetic coil, formation of a high magnetic field and prevention of adverse effects on the winding current due to the back electromotive voltage can be achieved.
しかるに、前記第１図に示す構成からなる電磁コイル
は、第６図に示すように、電動機または発電機の界磁と
して構成することができる。この場合、界磁鉄心20に巻
着させる界磁巻線22は、それぞれ軟質磁性材料からなる
磁性板24を各層間に配設して巻着される。このように構
成した界磁を使用することにより、回転子26の回動に伴
い、この回転子26によって生じる動磁場φは、図示のよ
うに界磁に対し界磁巻線22の層間に配置した磁性板24を
透過させることができる。従って、前記電磁コイルを電
動機等の界磁として応用することにより、界磁巻線に流
れる電流に対し逆起電圧の発生を抑制し、界磁巻線電流
の低減を有効に防止することができる。However, the electromagnetic coil having the configuration shown in FIG. 1 can be configured as a field of a motor or a generator as shown in FIG. In this case, the field winding 22 wound around the field iron core 20 is wound by arranging a magnetic plate 24 made of a soft magnetic material between the respective layers. By using the field configured as described above, the dynamic magnetic field φ generated by the rotor 26 with the rotation of the rotor 26 is arranged between the layers of the field winding 22 with respect to the field as shown in the figure. The transmitted magnetic plate 24 can be transmitted. Therefore, by applying the electromagnetic coil as a field of a motor or the like, it is possible to suppress the generation of a back electromotive voltage with respect to the current flowing through the field winding, and to effectively prevent the reduction of the field winding current. .
なお、第７図は、従来の電動機等における界磁の構成
を示すものである。この場合、回転子26に生じる動磁場
φは、界磁鉄心20に巻着された界磁巻線22と鎖交するた
め、この界磁巻線22に流れる電流に対し逆起電圧を発生
して、界磁巻線電流の低減をもたらすことになる。FIG. 7 shows a configuration of a field in a conventional electric motor or the like. In this case, the dynamic magnetic field φ generated in the rotor 26 interlinks with the field winding 22 wound on the field iron core 20, so that a counter electromotive voltage is generated with respect to the current flowing through the field winding 22. As a result, the field winding current is reduced.
前述したように、第１図ないし第５図に示す構成から
なる電磁コイルにおいては、巻線の各層間に軟質磁性材
料からなる磁性板等を配置することにより、各巻線が磁
性板と接触ないし近接する割合が大幅に増大して高磁場
を発生し、高インダクタンスの電磁コイルとすることが
できると共に、前記磁性板が外部磁束に対してこれを容
易に透過させ、巻線に流れる電流に対し鎖交して逆起電
圧の発生を抑制し、巻線電流の低減を防止することがで
きる。As described above, in the electromagnetic coil having the configuration shown in FIGS. 1 to 5, by disposing a magnetic plate or the like made of a soft magnetic material between the layers of the winding, each winding does not contact the magnetic plate. The proximity ratio is greatly increased to generate a high magnetic field, which can be used as an electromagnetic coil having a high inductance. The occurrence of back electromotive voltage due to linkage is suppressed, and a reduction in winding current can be prevented.
そこで、前記電磁コイルでは、鉄心から離反する方向
において外部磁束は次第に少なくなることから、前記磁
性板の厚さを、それぞれ鉄心から離反するに従い順次肉
薄となるように変化させる。これにより、電磁コイルの
巻線部に生じる磁束の流れを調整し、外部磁束による巻
線電流への悪影響を有効に防止することができ、電磁コ
イルをさらに小形化するこが可能となる。Therefore, in the electromagnetic coil, since the external magnetic flux gradually decreases in the direction away from the iron core, the thickness of the magnetic plate is changed so as to become thinner as the distance from the iron core increases. Thereby, the flow of the magnetic flux generated in the winding portion of the electromagnetic coil can be adjusted, the adverse effect of the external magnetic flux on the winding current can be effectively prevented, and the electromagnetic coil can be further downsized.
従って、このような構成からなる本発明に係る電磁コ
イルの好適な一実施例を、第８図に示す。Accordingly, a preferred embodiment of the electromagnetic coil according to the present invention having such a configuration is shown in FIG.
すなわち、第８図に示す実施例においては、鉄心10の
頸部10aに対し巻線14を４層に施したものである。この
場合、巻線14の各層間には、それぞれ軟質磁性材料から
なる短冊状の磁性板14a、14b、14cを、鉄心10の軸方向
と平行に、しかも前記巻線14との間に空隙を設けずに密
接して配置する。また、前記磁性板14a、14b、14cは、
それぞれ鉄心10から離反するに従い、順次肉薄となるよ
うに変化させる。そして、これら磁性板14a、14b、14c
の各肉厚を総計した鉄心10の頸部10aの厚さ寸法は、後
述する第９図に示す従来の電磁コイルの鉄心10の頸部10
aの厚さｄと同一になるように設定する。That is, in the embodiment shown in FIG. 8, the winding 14 is applied to the neck 10a of the iron core 10 in four layers. In this case, strip-shaped magnetic plates 14a, 14b, 14c made of a soft magnetic material are provided between the respective layers of the winding 14 in parallel with the axial direction of the iron core 10, and a gap is formed between the windings 14. Closely arranged without providing. Further, the magnetic plates 14a, 14b, 14c
As they move away from the iron core 10, they are sequentially changed to become thinner. And these magnetic plates 14a, 14b, 14c
The thickness of the neck 10a of the iron core 10 obtained by summing the respective thicknesses is the neck 10 of the conventional electromagnetic coil iron 10 shown in FIG.
The thickness is set to be the same as the thickness d of a.
第９図は、従来の電磁コイルを示し、各部の寸法は図
示の通りである（但し、単位はmm）。FIG. 9 shows a conventional electromagnetic coil, and the dimensions of each part are as shown (however, the unit is mm).
そこで、前記第８図に示す本発明に係る電磁コイル
と、第９図に示す従来の電磁コイルとの、それぞれ鉄心
量と巻線の巻回数を同一とした場合における特性につき
測定したところ、次のような結果が得られた。Then, when the characteristics of the electromagnetic coil according to the present invention shown in FIG. 8 and the conventional electromagnetic coil shown in FIG. The following results were obtained.
以上の結果から、本発明の電磁コイルによれば、従来
の電磁コイルに比べて高インダクタンスが得られること
が確認され、これにより電磁コイルの誘導起電力も増大
し、高磁場が得られることが判明した。 From the above results, according to the electromagnetic coil of the present invention, it was confirmed that a higher inductance was obtained as compared with the conventional electromagnetic coil, whereby the induced electromotive force of the electromagnetic coil was increased, and a higher magnetic field was obtained. found.
前述したように、本発明によれば、巻線の各層間にそ
れぞれ軟質磁性材料からなる短冊状の磁性板を、鉄心の
軸方向と平行に前記巻線と密接して配置することによ
り、各巻線が磁性板と接触ないし近接する割合が大幅に
増大して高磁場を発生し得ると共に、高インダクタンス
の電磁コイルとすることができる。また、前記磁性板
が、外部磁束に対してこれを容易に透過させることがで
き、巻線に流れる電流に対し鎖交して巻線電流の低減を
生じさせる逆起電圧の発生を容易かつ有効に防止するこ
とができる。As described above, according to the present invention, a strip-shaped magnetic plate made of a soft magnetic material is disposed between each layer of the winding in close contact with the winding in parallel with the axial direction of the iron core. The rate at which the wire contacts or approaches the magnetic plate is greatly increased, so that a high magnetic field can be generated and an electromagnetic coil having a high inductance can be obtained. In addition, the magnetic plate can easily transmit the external magnetic flux, and can easily and effectively generate a back electromotive voltage that causes a reduction in the winding current by interlinking the current flowing in the winding. Can be prevented.
そして、前記磁性板の厚さをそれぞれ鉄心から離反す
るに従い、順次肉薄となるように変化させて配置するこ
とにより、鉄心に対し外側の巻線に対する逆起電圧の発
生を次第に抑制し、巻線電流の低減を防止して巻線電流
の流れを良好にし、電磁コイルの巻線部に生じる磁束の
流れを調整して、広範囲のインダクタンス特性を持った
電磁コイルを得るように設計することが容易となる。Then, as the thickness of the magnetic plate moves away from the iron core, the thickness of the magnetic plate is sequentially changed so as to become thinner and arranged, thereby gradually suppressing the generation of a back electromotive voltage with respect to the outer winding with respect to the iron core. It is easy to design to prevent current reduction and improve the flow of winding current, adjust the flow of magnetic flux generated in the winding part of the electromagnetic coil, and obtain an electromagnetic coil with a wide range of inductance characteristics Becomes
従って、本発明の電磁コイルによれば、簡単な構成に
より、従来の電磁コイルと略同等の誘導起電力を得よう
とする場合、その大きさは極めて小形化することが可能
であり、また外部磁束による巻線電流への悪影響も有効
に防止することができ、常に安定した磁場の形成と巻線
電流の安定化を達成することができる。Therefore, according to the electromagnetic coil of the present invention, when an induced electromotive force substantially equal to that of the conventional electromagnetic coil is to be obtained with a simple configuration, the size thereof can be extremely reduced, and the external An adverse effect on the winding current due to the magnetic flux can also be effectively prevented, and a stable magnetic field can be always formed and the winding current can be stabilized.
以上、本発明の好適な実施例について説明したが、本
発明は前述した実施例に限定されることなく、本発明の
精神を逸脱しない範囲内において種々の設計変更をなし
得ることは勿論である。The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and it is needless to say that various design changes can be made without departing from the spirit of the present invention. .
第１図は本発明に係る電磁コイルの基本構成を示す要部
断面図、第２図は第１図のII−II線断面図、第３図は第
１図に示す電磁コイルの変形例を示す要部断面図、第４
図は第３図に示す電磁コイルに適用する巻線の構造を示
す要部断面斜視図、第５図は第３図に示す電磁コイルの
さらに変形例を示す要部断面図、第６図は電磁コイルの
応用例と外部磁束に対する影響を示す説明図、第７図は
第６図に示す電磁コイルと比較するための従来の電磁コ
イルの応用例を示す説明図、第８図は本発明に係る電磁
コイルの好適な一実施例を示す要部断面図、第９図は第
８図に示す本発明に係る電磁コイルと構造および特性の
比較を行うための従来の電磁コイルの要部断面図であ
る。 10……鉄心、10a……頸部 12……巻線、14……磁性板 12a……導線、12b……磁性板 16……磁性粉末、20……界磁鉄心 22……界磁巻線、24……磁性板 26……回転子FIG. 1 is a sectional view of a principal part showing a basic configuration of an electromagnetic coil according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a modification of the electromagnetic coil shown in FIG. FIG.
FIG. 5 is a perspective view of a principal part showing a structure of a winding applied to the electromagnetic coil shown in FIG. 3, FIG. 5 is a sectional view of a principal part showing a further modification of the electromagnetic coil shown in FIG. 3, and FIG. FIG. 7 is an explanatory diagram showing an application example of an electromagnetic coil and the effect on external magnetic flux, FIG. 7 is an explanatory diagram showing an application example of a conventional electromagnetic coil for comparison with the electromagnetic coil shown in FIG. 6, and FIG. 9 is a cross-sectional view of a main part of a preferred embodiment of the electromagnetic coil according to the present invention. FIG. 9 is a cross-sectional view of a main part of a conventional electromagnetic coil for comparing the structure and characteristics of the electromagnetic coil according to the present invention shown in FIG. It is. 10 ... iron core, 10a ... neck 12 ... winding, 14 ... magnetic plate 12a ... lead wire, 12b ... magnetic plate 16 ... magnetic powder, 20 ... field iron core 22 ... field winding , 24 ... magnetic plate 26 ... rotor
フロントページの続き (56)参考文献 特開 昭60−156234（ＪＰ，Ａ) 特公 昭39−26482（ＪＰ，Ｂ１)Continuation of the front page (56) References JP-A-60-156234 (JP, A) JP-B-39-26482 (JP, B1)
Claims (1)
巻着してなる電動機または発電機の界磁用の電磁コイル
において、 前記巻線の各層間にそれぞれ軟質磁性材料からなる短冊
状の磁性板を鉄心の軸方向と平行に前記巻線と密接して
配置すると共に、前記磁性板の厚さをそれぞれ鉄心から
離反するに従い順次肉薄となるように変化させて配置す
ることを特徴とする電磁コイル。1. An electromagnetic coil for a field of a motor or a generator in which windings are wound in multiple layers around an iron core made of a soft magnetic material, wherein a strip of soft magnetic material is provided between each layer of the windings. The magnetic plate is arranged in close contact with the windings in parallel with the axial direction of the iron core, and is arranged so that the thickness of the magnetic plate is changed so as to become thinner sequentially as it moves away from the iron core. Electromagnetic coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63242292A JP2657968B2 (en) | 1988-09-29 | 1988-09-29 | Electromagnetic coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63242292A JP2657968B2 (en) | 1988-09-29 | 1988-09-29 | Electromagnetic coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0291906A JPH0291906A (en) | 1990-03-30 |
| JP2657968B2 true JP2657968B2 (en) | 1997-09-30 |
Family
ID=17087071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63242292A Expired - Fee Related JP2657968B2 (en) | 1988-09-29 | 1988-09-29 | Electromagnetic coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2657968B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7325564B2 (en) | 2004-03-24 | 2008-02-05 | Keihin Corporation | Linear solenoid valve |
| JP4566796B2 (en) * | 2004-03-31 | 2010-10-20 | 株式会社ケーヒン | Linear solenoid valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4410492Y1 (en) * | 1966-08-15 | 1969-04-28 | ||
| JPS60156234A (en) * | 1984-01-25 | 1985-08-16 | Shibaura Eng Works Co Ltd | Motor |
| JPS60213015A (en) * | 1984-04-09 | 1985-10-25 | Kitagawa Kogyo Kk | Noise intercepting transformer and manufacture thereof |
-
1988
- 1988-09-29 JP JP63242292A patent/JP2657968B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0291906A (en) | 1990-03-30 |
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