JPS5947722A - Leakage transformer - Google Patents

Leakage transformer

Info

Publication number
JPS5947722A
JPS5947722A JP57156862A JP15686282A JPS5947722A JP S5947722 A JPS5947722 A JP S5947722A JP 57156862 A JP57156862 A JP 57156862A JP 15686282 A JP15686282 A JP 15686282A JP S5947722 A JPS5947722 A JP S5947722A
Authority
JP
Japan
Prior art keywords
core
magnetic flux
leakage
output
winding
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.)
Pending
Application number
JP57156862A
Other languages
Japanese (ja)
Inventor
Yoshinobu Onodera
小野寺 義伸
Kohei Yuhara
湯原 恒平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Electric Equipment Corp
Toshiba Denzai KK
Original Assignee
Toshiba Electric Equipment Corp
Toshiba Denzai KK
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 Toshiba Electric Equipment Corp, Toshiba Denzai KK filed Critical Toshiba Electric Equipment Corp
Priority to JP57156862A priority Critical patent/JPS5947722A/en
Publication of JPS5947722A publication Critical patent/JPS5947722A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08High-leakage transformers or inductances

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

PURPOSE:To equalize magnetic flux passing windings and reduce fluctuation of voltage between sections by providing a magnetic flux leakage part in such a manner that the magnetic flux leakage path core is protruded toward the yoke core from leg core. CONSTITUTION:A path core 11 is added in place of existing cap, this path core 11 is engagingly inserted between a leg cores 5a and 5b, width of gaps 2, 4 and number of turns of primary an secondary windings are adjusted and the primary (excitation) inductance is equalized to the leakage inductance, namely to a coupling constant. When such path core is added, leakage magnetic flux almost passes this path core and accordingly fluctuation of voltage between sections can be reduced. For example, when windings Pdc and Pce are compared, an inductance value becomes about -6.5% and fluctuation can be reduced remarkably.

Description

【発明の詳細な説明】 本光明i、I、レクシ・1ン巻さしJ 7.lI Nの
各1ごクシコン間のミルのバラン4を少i(< L/ 
/、−リーノノージ1〜ノンスに関(Jる。1 従来、リーケージ!・ランスどしC第1図に示づ構成の
ものか知らJt、 <いる。(二のリーケージ1−″)
ンスは、例えば、放電灯点灯装置にJ31Jる安定器ま
たtit i’ンバー/7[−ランスど(〕(−1゛1
次巻線に高周波電圧が印加され、この高周波電圧の2次
巻線講起電月−(こJ、7> −C’ b父電灯を定7
1冨F lft幻りるIこめ1こ用いられる。第1図に
a3いて、i aお31、び11+はト形−1アで、イ
ニ1ir)の]アte1間隔を1Nいて対向しC配置さ
れ、ご(′、)の−(゛ヤップ2,3./Iが形成され
でいる1、sl、1.−1−1アl a +f; J、
げ11)の中刃5B。
[Detailed description of the invention] Honkomei, I, Lexi 1-in winder J 7. 4 of the mill baluns between each unit of lI N (< L/
/, - Concerning Reno Noge 1 ~ Nonce (Jru. 1 Conventionally, leakage!・Lance C I don't know if it has the configuration shown in Figure 1. (No. 2 Leakage 1-'')
For example, the ballast installed in the discharge lamp lighting device or the tit i' bal/7[-lance()(-1゛1
A high-frequency voltage is applied to the secondary winding, and this high-frequency voltage causes the secondary winding to generate an electric current.
1 F lft illusion is used. In Figure 1, at a3, i a, 31, and 11+ are in the form of -1 a, and are arranged in C facing each other with an interval of 1 N between ate1 of ini 1ir), and -( , 3./I is formed 1, sl, 1.-1-1 al a +f; J,
11) Middle blade 5B.

5 II !Jこのリーノ7−ジ1−ランスの脚部」ア
を構成し、−ぞれそれ1次W線6 N〕h+I、 l′
)ei、 Pdc。
5 II! J This line 7-ji 1- constitutes the leg of the lance, - each primary W line 6 N]h+I, l'
)ei, Pdc.

1ace)おJ:び2次巻線7がt・クションさきされ
てイル。]ア1a、lbの上辺Oa、 8 b 、側辺
9a。
1ace) J: and the secondary winding 7 are connected to the t-ction. ] A 1a, lb upper side Oa, 8 b, side side 9a.

9bJ3よび下〕υ10a、10b 1.t:脚部ml
 アトトG ニ主磁路を形成するためのヨーク−]アを
構成している。
9bJ3 and below] υ10a, 10b 1. t: leg ml
It constitutes a yoke for forming the main magnetic path.

ところで、このJ:うなり−//−ジト−ノンスにdi
いて、磁束(Jl[形]アla、lbの中37125 
a、 513がら十3Tl 8a 、 E’+ b J
lよび下辺10LI Ol+ ヘ、キ17ツプ2,3.
4を中心とする化較的広い範囲で漏洩するため、巻線の
位置−4イTわら【?クションににって通過磁束数が異
なり、従って同一巻数であっ(t)巻線のf)ン1(’
3 jl/、丁わJうセクション(こよ−)C電Jil
のバラツキが太きいという不都合があった。
By the way, this J: hum-//-jito-nonce di
37125 in the magnetic flux (Jl [shape] ala, lb)
a, 513 3 Tl 8a, E'+ b J
l and lower side 10 LI Ol+ f, key 17 tup 2, 3.
Since the leakage occurs in a relatively wide area centered around 4, the winding position - 4 I T straw [? The number of magnetic flux passing through the winding is different depending on the winding, so the number of turns is the same (t) winding f)
3 jl/、chowa J section (koyo-) C electric Jil
There was an inconvenience that there was wide variation.

本発明の[j的は、−LjlFの従来形における問題J
t+jに鑑み、リーケージ1〜ランスにおいで、磁束漏
洩用のパス−11を設[)漏洩磁束の大部分をパス−l
 ’/7を介して通過させるという(14想tご基づき
、W Ai!i!を通過する磁束を均等化し、1ツクシ
−Iン間の電j1のバラツキを小さくすることにある。
The objective of the present invention is to solve the problem J in the conventional form of -LjIF
Considering t+j, a path-11 for magnetic flux leakage is established from leakage 1 to the lance.
(Based on idea 14, the purpose is to equalize the magnetic flux passing through W Ai!i! and to reduce the variation in electric j1 between one wire and one wire.)

本発明は、中間に磁束漏洩部を右する脚部:]j7ど、
この磁束漏洩部の両側に−されで゛れセクション巻きさ
れた1次巻線および2次巻線と、前記脚部コアの両端を
前記1次巻線および2次巻線の9ト部を杆由して接続づ
る二’l−クコアどを貝IMりるり一ケージ1〜ランス
においC1前記磁束漏洩部は磁束漏洩用パス」アを前記
脚部=17から前記モ1−り〕アヘ向Gノ突出させて設
けたことを特徴とする。
The present invention has a leg portion with a magnetic flux leakage portion in the middle: ]j7, etc.
The primary winding and the secondary winding are wound in sections on both sides of this magnetic flux leakage part, and the 9th part of the primary winding and the secondary winding is connected to both ends of the leg core. The magnetic flux leakage section is a magnetic flux leakage path A from the leg section 17 to the MO1 direction G. It is characterized by being provided in a protruding manner.

以下、図面を用いて本発明の実施例を説明する。Embodiments of the present invention will be described below with reference to the drawings.

第2図は本発明の1実施例に係るリーク−−ジトランス
の構成を示′?J。第2図のリーケージ1−>ンスは、
第1図のり一ケージ1〜ランスにλ・jし、ギVツブ3
の代り1こパス−1111をイ・1加し、このパスコア
11を脚部丁1ア5aJ−5よび5bの間に嵌挿するど
ど))に、ギ11ツブ2,4の幅ならびに1次、13よ
び2次巻線の巻数を調整し、1次側(励磁)インダクタ
ンスおよび漏れインダクタンスづイ「わら結合定数を同
等にしたちのCある。
FIG. 2 shows the configuration of a leakage transformer according to one embodiment of the present invention. J. The leakage 1->ance in Figure 2 is
Figure 1 Glue λ・j to the cage 1 to the lance, and set the gear V knob 3.
Instead, add 1 pass core 1111 and insert this pass core 11 between legs 1A 5aJ-5 and 5b. , 13 and the number of turns of the secondary winding to equalize the primary (excitation) inductance and leakage inductance and the coupling constant.

このJ、う(、ニバス1)7を付加づるど、漏洩m束は
大部分このパス:]77を通るため、各(7クシヨン間
の電F「のバラツー1−は小さくなる。(911えば、
従来の!うめでは巻線Pdcとpceどを比較すると、
pceのhがリーケージインダクタンス1直で20%イ
代く、また電圧で12%低くアンバランスであったが、
本発明にJ、るど、インダクタンス1lrj F約−6
,5%と/fす、大幅にバラツキを小さくできる。
By adding this J, U(, Nibus 1) 7, most of the leakage m flux passes through this path: ] 77, so the variation of the electric current F' between each (7 counsions) becomes small. ,
Traditional! Comparing the winding PDC and PCE in Ume,
The h of the pce was 20% higher due to the leakage inductance, and the voltage was 12% lower and unbalanced.
In the present invention, J, Rudo, inductance 1lrj F approximately -6
, 5%/f, the variation can be significantly reduced.

第3図は本発明が適用される敢雷灯点灯装冒の回路例を
示す。
FIG. 3 shows an example of a circuit for a lightning lamp lighting device to which the present invention is applied.

同図において、電′源30は交流電源31を含み、この
交流電源31に整流回路例えば仝波整流回路32を接続
1.、以晴の回路にはこの整流回路32からの非平滑直
流(整流出力)を供給する。この整流出力端子1.11
間には一1ンデンリ33とア、rソレート用タイA−ド
34の1列回路を接続りるとともに定電流インダクタ3
5を介して、高周波発生装置、例えば高周波インバータ
40を接続1.7でいる。4113、バリスタ3(3、
−1ンj”ンリ37、平衡1〜ランス38はノイズ防止
回路を構成している。
In the figure, a power source 30 includes an AC power source 31, and a rectifier circuit, such as a high frequency rectifier circuit 32, is connected to the AC power source 31. , and the other circuits are supplied with non-smooth direct current (rectified output) from this rectifier circuit 32. This rectified output terminal 1.11
A single line circuit of 11 inductor 33 and a, r solate tie 34 is connected between them, and a constant current inductor 3 is connected between them.
Via 5, a high frequency generator, for example a high frequency inverter 40, is connected at 1.7. 4113, Barista 3 (3,
-1 inch 37 and balance 1 to lance 38 constitute a noise prevention circuit.

このインバータ7IOはプツシコブル形インバータを用
いたもので、1対のトランジスタ41,4.2、バイア
ス抵抗43.4/4.共振二1ンデンサ4!5および出
力1〜ランス/16よりなつ−Cいる。そしく、この出
カドランス/16とL T *発明のり一!)−シトラ
ンスが用いられCいる。
This inverter 7IO uses a push cobble type inverter, which includes a pair of transistors 41, 4.2, bias resistors 43.4/4. Resonant 21 capacitor 4!5 and output 1 to lance/16 are connected to Natsu-C. And so, this output Lance/16 and L T * Invention Noriichi! )-citrans is used.

インバータ40は前記整流出力正側端子aに出力I−ラ
ンス46の1次巻線461の中点<1ンタータッ−7)
Cを4名す箋!Jるととb 1.Tバイノ′ス1氏1へ
1/13を介しCトランジスタ41のベースを、おJ:
びバイアス抵抗44を介しC1−ランジスタ/12のベ
ースをそれぞれ接続し、また前記イングクリ35を介し
た前記@f!流出力出力0側端子1−ランジスタ41.
42の1ミツタをそれぞれ接続するとともにこのトラン
ジスタ41./12の一]1ノクタをそれぞれ前記出力
i〜ランス46の1次巻線461の両端に接続し、この
1次巻線4010両9ツ:間に共振]ンデンt)′45
を接続し、さらに前記出力1〜ランス46の3次巻お1
)46:3を前記トランジスタ41゜42のベースに接
続Iノでいる。
The inverter 40 connects the rectified output positive side terminal a to the midpoint of the primary winding 461 of the output I-lance 46 (7)
Write down 4 C names! J and b 1. Connect the base of C transistor 41 through 1/13 to Tbinose 1, and connect it to J:
The @f! Output output 0 side terminal 1 - transistor 41.
42 are connected to each other, and this transistor 41. /12] 1 noctor is connected to both ends of the primary winding 461 of the output i to the lance 46, and resonance occurs between the primary windings 4010 and 461.
and further connect the output 1 to the tertiary winding 1 of the lance 46.
) 46:3 is connected to the bases of the transistors 41 and 42.

一1j 、前記出力1ヘランス46の1次巻1!il 
461の中点Cと両端との間にそれぞれ中間タップ(1
,eをに月)Cいる。イlノて、これらのタップd、 
cに限流用l・ランス47を介して高周波整流回路例え
ばダイオードlIB、I9h日うなる全波整流回路を接
続し、ざらにこの整流回路を前記コンデンサ33とゲ1
′Δ−ド34の1&続点に接続1ノでフィードバック回
路を構成()ている。
1j, the primary volume 1 of the output 1 Herance 46! il
Between the midpoint C of 461 and both ends, there are intermediate taps (1
, e on the moon)C. Ignore these taps,
A high frequency rectifier circuit such as a diode lIB, I9h is connected to c through a current limiting lance 47, and this rectifier circuit is roughly connected to the capacitor 33 and gate 1.
A feedback circuit is formed by connecting 1 and connecting points of the Δ-domain 34.

そ【ノ【、前t1:出力1−ランス46の2次巻線46
2に負荷どして放電灯50を接続する。なお、この2次
巻線462には#電灯50のフイラメン1〜電極にフィ
ラメン1〜電流を供給する1、−めのタップ[。
t1: Output 1 - Secondary winding 46 of lance 46
2 and connect the discharge lamp 50 as a load. Note that this secondary winding 462 has a 1, -th tap that supplies current to the filament 1 to the electrodes of the electric lamp 50.

gを設し)でいる。g).

次に以十のように構成した装「9の作用を)ホベる。Next, let's look at the effect of 9, which is structured as follows.

今、交流電源31が投入されると金波整流回路32より
仝波整流出力が発生し、これがインダクタ35を介しC
インバータ40にLiえられる。これによりインバータ
40rは、前記整流出力がバイアス抵抗/13.44を
介しCトランジスタ4′1゜42にベース亀′流どしで
ノー7えられる。1べ)とトランジスタ41./′12
はわfかなアンバノンスにより一方が先にオンするが、
今1〜シンシスタ41が先にオンリーるど出カドランス
4〔3の1次巻線461に電流が流れる。従って、この
状態(゛1次作線461の−rンダクタンス分ど几(h
マ1ンJンリ4りにより振動電圧が発生し、これが3次
を線463に起電力を生じ今度は1−ランジスタ42を
オンする3゜従って以下同様にしC1〜ランジスタ41
.42が交HにオンA]されることになる。この場合、
前記出力1−ランス46の1次巻線461の誘起出力に
にリダイA−ド/I8./I9からなる整流回路を介し
て整流出力が発生し、この出力がフィードバック出力と
してコンデンサ−33に与λられる。これにより、コン
デン号33は所定方向に充電される。
Now, when the AC power supply 31 is turned on, a high wave rectifier output is generated from the gold wave rectifier circuit 32, and this is converted to C through the inductor 35.
It is fed to the inverter 40. As a result, the rectified output of the inverter 40r is passed through the bias resistor /13.44 to the C transistor 4'142 in the form of a base current. 1b) and transistor 41. /'12
One of them turns on first due to a fragile ambiance, but
Now, current flows through the primary winding 461 of the only output transformer 4 [3] through the synsister 41 first. Therefore, in this state (-r inductance distribution of the primary wire 461 (h
An oscillating voltage is generated due to the rotation of the motor, and this generates an electromotive force in the tertiary line 463, which turns on the 1-transistor 42.
.. 42 will be turned on to AC. in this case,
Redyed A-do/I8. to the induced output of the primary winding 461 of the output 1 lance 46. A rectified output is generated through the rectifier circuit consisting of /I9, and this output is applied to the capacitor 33 as a feedback output. As a result, the condenser 33 is charged in a predetermined direction.

まだ、このT1ンデンリ−33は整流回路32の整流出
力が半4J“イクル毎に所定電圧ケ2’rわち本実施例
においU mlンデンザ33の充71−i雷月以下にな
ると放電され、こh(電出力をインバータ40に与える
However, this T1 power supply 33 is discharged when the rectification output of the rectifier circuit 32 becomes equal to or less than a predetermined voltage of 2'r every half 4J cycle, that is, in this embodiment, the Uml power supply 33 is discharged. (gives electric power to the inverter 40.

これにより−r゛/バータ40の出カドランス4(3の
2次巻線462側(6二は体什区間のtrいiV′fi
周波出力が発生されることになり、このδ’111:’
、l t17/出力を−6つて放電灯37は良好な発光
効率でr、t tlされる。
As a result, the secondary winding 462 side of the output transformer 4 (3) of the -r/verter 40 (62 is
A frequency output will be generated, and this δ'111:'
, l t17/output by -6, the discharge lamp 37 is emitted with good luminous efficiency.

以上のJ、うに、本発明によるど、リー)7−ジl〜ラ
ンスの]アにバスコアを取り44(J T漏洩磁束を収
束し、巻線を通過する磁束を均等化しているのでセクシ
ョン巻ぎした各セクションの電圧のバラツ4−が小さく
イTす、従って、本発明のり一つ−ジi−ランスを出カ
ドランスとしC使用したブツシュブルーインバータにd
3いて(まその誘起出力霜月:の正負バランスをよくす
ることができる。
According to the present invention, the bus core is taken in A of the J, 7, and lance above, and the section winding is There is a small variation in the voltage of each section.
3. It is possible to improve the positive and negative balance of (Masono's induced output Shimotsuki).

なお、本発明は上記実施例に限定されず要旨を変更しな
い範囲で適宜変形して実Mllできる。例えば十37i
の実施例では2個のE形:1ア1a、1t]とこれらの
E形コアの)中刃すなわち脚δ(1コアの間に嵌挿した
I形のバスコア11とを用いているが、例えば第4図に
示す、[)に2個の1ノ形コア21a。
It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be appropriately modified and put into practice without changing the gist. For example, 137i
In this embodiment, two E-shaped cores (1a, 1t) and an I-shaped bus core 11 inserted between the cores (1) are used. For example, as shown in FIG. 4, two 1-shaped cores 21a are shown in parentheses.

211)と1形の脚部コア5中火部にパス−1711を
突出させた形状の十字形−1122とで第2図の実施例
にI−31ノるとほぼ同一形状の11を形成覆るように
1ノηムよい。この場合、結合定数調整用のギャップ2
,4は十字形コアと(」形コアとの接合部等、脚部コア
の巻線巻同部を除く部分およびヨークコアのイf意の箇
所に設LJることかできる。また、第4図の実施例にお
いて、一方のU形コアおよび同じ側のパスコアを省略゛
りることもできる。
211) and a cross shape 1122 with a path 1711 protruding from the medium heat part of the leg core 5 of type 1 to form a shape 11 that is almost the same as that of I-31 in the embodiment shown in FIG. 2. 1 nom is better. In this case, gap 2 for coupling constant adjustment
, 4 can be installed at any desired location on the yoke core, such as at the junction between the cross-shaped core and the (''-shaped core), at a portion other than the same portion of the winding of the leg core, and at any desired location on the yoke core. In this embodiment, the U-shaped core on one side and the path core on the same side can also be omitted.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のリーケージトランスの巻線をコア上面で
切断した図、第2図は本発明の1実施例に係るリーケー
ジトランスの巻線をコアの土面で切断した図、第3図は
本発明のリーケージ1〜ランスが適用される放電灯点灯
装置の回路図、第4図は本発明の他の実施例に係るリー
ケージトランスの巻線をコアの上面ぐ切断した図である
。 1(1a、1b)・・・[形コア、 5(5a 、5b )・・・脚部コア、11・・・パス
コ1ア、6・・・1次巻線、7・・・2次巻線、8a、
8b、9a、’9b、I Qa、 10b ・Tl−り
]コア46・・・出カドランス、60・・・放電灯。 特許出願人 東芝電材株式会社 代理人 弁1IIj士 伊東辰雄 代理人 弁理士 伊東哲也
Fig. 1 is a diagram of the winding of a conventional leakage transformer cut at the upper surface of the core, Fig. 2 is a diagram of the winding of a leakage transformer according to an embodiment of the present invention, cut at the soil surface of the core. FIG. 4 is a circuit diagram of a discharge lamp lighting device to which the leakage lance of the present invention is applied. FIG. 4 is a diagram in which the winding of a leakage transformer according to another embodiment of the present invention is cut across the top surface of the core. 1 (1a, 1b)... [shaped core, 5 (5a, 5b)... leg core, 11... Pasco 1a, 6... primary winding, 7... secondary winding line, 8a,
8b, 9a, '9b, IQa, 10b・Tl-ri] Core 46... Output Lance, 60... Discharge lamp. Patent applicant: Toshiba Electric Materials Co., Ltd. Agent: Attorney Tatsuo Ito Patent attorney: Tetsuya Ito

Claims (1)

【特許請求の範囲】[Claims] 中間に磁束漏洩部を・右する脚部−゛「ノ′と、(、の
磁束漏洩部の両側にでれC゛れじクション巻きされた1
次巻線J3J、び2次巻線と、前記脚部二17の両端を
前記1次巻線および2次巻線の外部を紅由して接続づる
−」−り−1)′とをFj lft−りるリークージ1
〜ランスにJ3いC1前記磁束漏洩部は術中漏洩用バス
コア4前記脚部−ノアから前記」−り1アl\向()突
出させてgQ CJたことを特徴と4るリーグ−シトラ
ンス3゜
There is a magnetic flux leakage part in the middle, and a leg part with a magnetic flux leakage part on the right.
The next winding J3J and the secondary winding are connected to both ends of the leg part 217 through the outside of the primary winding and the secondary winding. lft-Ruru Rikuji 1
~ The magnetic flux leakage part in the lance is characterized by being made to protrude in the direction ( ) from the leg part of the bus core for intraoperative leakage.
JP57156862A 1982-09-10 1982-09-10 Leakage transformer Pending JPS5947722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57156862A JPS5947722A (en) 1982-09-10 1982-09-10 Leakage transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57156862A JPS5947722A (en) 1982-09-10 1982-09-10 Leakage transformer

Publications (1)

Publication Number Publication Date
JPS5947722A true JPS5947722A (en) 1984-03-17

Family

ID=15637008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57156862A Pending JPS5947722A (en) 1982-09-10 1982-09-10 Leakage transformer

Country Status (1)

Country Link
JP (1) JPS5947722A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278230A (en) * 1985-09-28 1987-04-10 東レ株式会社 Decorative yarn
JPS63105145A (en) * 1986-10-23 1988-05-10 東レ株式会社 Leather like raised cloth
EP2259275A3 (en) * 2009-06-01 2011-12-14 Osram Gesellschaft mit Beschränkter Haftung High frequency transformer and multi-output constant current source with high frequency transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278230A (en) * 1985-09-28 1987-04-10 東レ株式会社 Decorative yarn
JPS63105145A (en) * 1986-10-23 1988-05-10 東レ株式会社 Leather like raised cloth
EP2259275A3 (en) * 2009-06-01 2011-12-14 Osram Gesellschaft mit Beschränkter Haftung High frequency transformer and multi-output constant current source with high frequency transformer

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