JPS60210828A - Choke coil - Google Patents

Abstract

PURPOSE:To obtain small size and high performance choke coil for discharge lamp by providing a winding to a troidal coil. CONSTITUTION:A choke coil for discharge lamp is manufactured by providing a troidal core of ferrite or a troidal core such as permalloy or amorphous, etc. Since this choke coil uses a coil forming a perfect closed magnetic loop, a small size choke coil can be obtained by directly showing a high permeability as a material. In case this troidal choke is connected, for example, in series to the cathode of fluorescent lamp, a stable DC current can flow when the fluorescent lamp starts. Since an AC current can be steadily choked after the lamp lights, more excellent performance can be obtained particularly in the AC lighting type lamp using a comparatively high frequency.

Description

【発明の詳細な説明】 本発明は、蛍光燈のような放電灯を始動させるにあたり
用いられる放電灯の点灯装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting device for a discharge lamp used for starting a discharge lamp such as a fluorescent lamp.

従来フェライトでつくられたＥＩ型またはＥＥ型のコア
にを線を施したチョークが用いられていたが、ＥＩ型コ
コアではμが低いため巻線の数も多くなり、かつ、Ｌを
かせぐためコアも比較的大型のものが用いられていた。Conventionally, chokes with wires applied to EI or EE type cores made of ferrite have been used, but EI type cocoa requires a large number of windings due to its low μ, and in order to increase L, the core A relatively large one was also used.

本発明は、これら従来の欠点をとりのぞいた新しい方式
を提供するものである。The present invention provides a new method that eliminates these conventional drawbacks.

すなわち、本発明はフエライ［・のトロイダルコアまた
はパーマロイ、アモルファス等の−１−ロイダルコアに
巻線を施したチョークコイルであり、完全な開磁路を構
成しているコアを用いているため、材料としての高透磁
率がそのまま生かされ、従来になく小型のチョークが得
られる。とくに用いる材料として、Ｇｏ基のアモルファ
ス材料を用いると磁歪が零に近く、低損失で高透磁率で
あるため、その効果は特に著しい。That is, the present invention is a choke coil in which wires are wound around a toroidal core made of ferrite or a -1-loidal core made of permalloy, amorphous, etc., and since the core that forms a completely open magnetic path is used, the material By taking advantage of the high magnetic permeability as it is, a choke that is smaller than ever before can be obtained. In particular, when a Go-based amorphous material is used, the effect is particularly remarkable because the magnetostriction is close to zero, the loss is low, and the magnetic permeability is high.

一方、Ｆｅ基のアモルファス材料を用いると磁歪がやや
大さいが、磁束密度が高いため、小型で大電流に対して
安定なチョークが得られる。フェライ１〜の場合には、
磁束密度が低いが、ＥＩココアは異なり、材料のもつ本
来の透磁率が生かされ、どくに高周波において発熱の小
さい特長をもつチョークコイルが得られる。On the other hand, if an Fe-based amorphous material is used, the magnetostriction is somewhat large, but the magnetic flux density is high, so a choke that is small and stable against large currents can be obtained. In the case of Ferrai 1~,
Although the magnetic flux density is low, EI Cocoa is different in that it takes advantage of the material's original magnetic permeability, resulting in a choke coil that has the advantage of generating little heat at high frequencies.

本発明になる１〜ロイダルチヨークを、例えば、蛍光燈
のカソードに直列に接続すると、蛍光燈の始動時には直
流電流を安定に流すことができ、点灯したのちには定常
的に交流電流をチョークできるため、とくに比較的周波
数の高い交流点灯型のものにおいて、従来型ＥＩココア
用いたものに比べ、より小型で優れた性能を発揮する。For example, by connecting the Lloyd's yoke in series with the cathode of a fluorescent light, it is possible to stably flow a direct current when the fluorescent light is started, and to constantly choke the alternating current after the light is turned on. Therefore, especially in AC lighting type with relatively high frequency, it is smaller and exhibits superior performance compared to the conventional type using EI cocoa.

以下、本発明を実施例に基づいて説明する。Hereinafter, the present invention will be explained based on examples.

実施例１ フエライ１〜．パーマロイ、ＦｅＷアモルファス。Example 1 Huerai 1~. Permalloy, FeW amorphous.

ＣＯ基アモルファスのトロイダルコアを用いて、Ｌ＝　
２５０１１１８．　Ｒ＝　５Ωになるよう調整してチョ
ークコイルを作製し、蛍光燈始動用チョークとしたとこ
ろ、従来ＥＩ２８コアを用いていたものに比べ、トロイ
ダルフェライトコアでは体積で約１／′２．パーマロイ
では１／３．Ｆｅ基アモルファスで１／３．Ｃｏ基アモ
ルファスで１７′４にすることができ、かつ、蛍光燈始
動時の発熱が極めて小さく、動作も安定していることが
確認できた。Using a CO-based amorphous toroidal core, L=
2501118. When I made a choke coil by adjusting R = 5Ω and used it as a choke for starting a fluorescent light, the volume of the toroidal ferrite core was approximately 1/2 of that of a conventional choke using an EI28 core. Permalloy is 1/3. 1/3 with Fe-based amorphous. It was confirmed that it was possible to make it 17'4 with Co-based amorphous, that the heat generated when starting the fluorescent lamp was extremely small, and that the operation was stable.

実施例２ 幅５ＩＩＩＩ１１のアモルファスリボン磁性体を内径８
φ。Example 2 An amorphous ribbon magnetic material with a width of 5III11 and an inner diameter of 8
φ.

外径１４φのトロイダル状に巻き、表面からエポキシ樹
脂をコーティングしたのち、導電銅線を巻回したのち、
再びエポキシ樹脂をコーディングして、実施例１と同様
のチョークコイルを製作し、蛍光燈の始動用として用い
たところ、実施例１で述べｌこと同様、小型で高性能の
ものが得られることが判明し、かつ、周囲がエポキシ樹
脂で覆われている土に発熱が小さいため、蛍光燈筐体内
のごく狭い場所へ置くことができ、従来となくコンバク
［−な照明量が得られた。After winding it into a toroidal shape with an outer diameter of 14φ, coating the surface with epoxy resin, and wrapping it with conductive copper wire,
A choke coil similar to that in Example 1 was manufactured by coating it with epoxy resin again, and was used to start a fluorescent light. As described in Example 1, a compact and high-performance coil was obtained. Moreover, because the soil surrounding the lamp is covered with epoxy resin generates little heat, it is possible to place it in a very narrow space inside the fluorescent lamp housing, providing an unprecedented amount of illumination.

Claims (1)

【特許請求の範囲】[Claims] トロイダルコアに巻線を施したことを特徴とする放電灯
点灯用チョークコイル。A choke coil for lighting a discharge lamp characterized by a toroidal core wound with wire.