JPS63239907A - Magnetic core for oscillation transformer - Google Patents
Magnetic core for oscillation transformerInfo
- Publication number
- JPS63239907A JPS63239907A JP62073539A JP7353987A JPS63239907A JP S63239907 A JPS63239907 A JP S63239907A JP 62073539 A JP62073539 A JP 62073539A JP 7353987 A JP7353987 A JP 7353987A JP S63239907 A JPS63239907 A JP S63239907A
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- magnetic core
- amorphous magnetic
- oscillation frequency
- magnetic metal
- 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.)
- Granted
Links
- 230000010355 oscillation Effects 0.000 title claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 230000004907 flux Effects 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 22
- 150000002739 metals Chemical class 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910001004 magnetic alloy Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、スイッチング電源に用いられる発振トランス
用磁心に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a magnetic core for an oscillation transformer used in a switching power supply.
（従来の技術）
近年、各種電子機器等の安定化電源として、従来のシリ
ーズドロッパ方式電源に比べ小型、軽量化が可能なスイ
ッチング電源が多用されている。(Prior Art) In recent years, switching power supplies, which are smaller and lighter than conventional series dropper type power supplies, have been frequently used as stabilized power supplies for various electronic devices and the like.
このスイッチング電源には、適当なスイッチング素子と
発振トランス用磁心の磁気特性（ヒステリシス特性）と
を用いて、入力側の直流を一旦高周波の交流に変換し、
再度整流回路により直流に変換して、出力を得るように
構成したものがある。This switching power supply uses an appropriate switching element and the magnetic characteristics (hysteresis characteristics) of the magnetic core for the oscillation transformer to convert the DC on the input side into high-frequency AC.
Some devices are constructed so that the output is obtained by converting the current to direct current again using a rectifier circuit.
このようなスイッチング電源に用いる発振トランス用の
磁心の材質としては、従来、Ｆｅ−Ｎｉ系合金、フェラ
イト、非晶質磁性合金等を使用していた。Conventionally, Fe--Ni alloys, ferrites, amorphous magnetic alloys, and the like have been used as materials for magnetic cores for oscillation transformers used in such switching power supplies.
（発明が解決しようとする問題点）
ところで、このようなスイッチング電源の採用により、
従来のシリーズ電源に比べ小型化されてきたが、他の装
置に比べるとまだ大型で重量も大きい。従って、これを
さらに小型化するための方法としては、例えば発振周波
数を高め、これによりトランスやコイル等を小型化する
方法が挙げられる。(Problems to be solved by the invention) By the way, by adopting such a switching power supply,
Although they have become smaller than conventional series power supplies, they are still large and heavy compared to other devices. Therefore, as a method for further downsizing this, for example, there is a method of increasing the oscillation frequency and thereby downsizing the transformer, coil, etc.
しかしながら、従来のスイッチング電源に用いる発振ト
ランス用の磁心の材質のうち、Ｆｅ−Ｎｉ系合金は、鉄
損が大きく発振周波数を高周波化できず、フェライトは
、温度に対する特性が悪く、回路の温度上昇により発振
周波数が著しく変化するという間趙があった。また、非
晶質磁性合金は、低鉄損で温度に対する特性も良好であ
るが、発振が不安定になるという問題があった。However, among the magnetic core materials for the oscillation transformers used in conventional switching power supplies, Fe-Ni alloys have large core losses and cannot increase the oscillation frequency, and ferrites have poor temperature characteristics and increase the temperature of the circuit. According to Zhao, the oscillation frequency changes significantly. Furthermore, although amorphous magnetic alloys have low iron loss and good temperature characteristics, they have the problem of unstable oscillation.
本発明はこのような従来の問題点を解決するためになさ
れたもので、発振周波数の高周波化が可能で、安定して
発振することができ、電源のさらなる小型化が可能な発
振トランス用磁心を提供することを目的とする。The present invention was made in order to solve these conventional problems, and provides a magnetic core for an oscillation transformer that can increase the oscillation frequency, stably oscillate, and further downsize the power supply. The purpose is to provide
「発明の構成］
（問題点を解決するための手段）
本発明の発振トランス用磁心は、非晶質磁性金属薄板の
巻回体であって、発振周波数における角形比が８０〜９
７％の範囲であることを特徴としている。"Structure of the Invention" (Means for Solving the Problems) The magnetic core for an oscillation transformer of the present invention is a wound body of an amorphous magnetic metal thin plate, and has a squareness ratio of 80 to 9 at the oscillation frequency.
It is characterized by a range of 7%.
本発明において、発振周波数における角形比を８０〜９
７％の範囲と限定した理由は、この角形比が８０％未溝
では、入力電力に対する出力電力の効率が低下し実用的
ではなくなり、９７％を超えると発振が不安定になった
り、発振しなくなったりすることによる。In the present invention, the squareness ratio at the oscillation frequency is set to 80 to 9.
The reason for limiting the range to 7% is that if the squareness ratio is less than 80%, the efficiency of the output power relative to the input power will decrease and become impractical, and if it exceeds 97%, the oscillation will become unstable or oscillate. It depends on the fact that it disappears.
本発明に使用する非晶質磁性金属は、
一般式：Ｍａ Ｍ’ ｂ ＸＣ
（式中、ＭはＦｅ、ＣｏおよびＮｉから選ばれる１種ま
たは２種以上の金属を表わし、Ｍ′はｌｌａ、ＩＶａ
、Ｖａ 、■ａ族から選ばれる１種または２種以上の元
素を表わし、ＸはＢ、ＳＬ、Ｐ、Ｃ，Ｇｅから選ばれる
１種または２種以上の元素を表わし、かツａ＋ｂ＋ｃ＝
１ 、０．６≦ａ＋ｂ≦ ０．８８、０．００５≦ｂ≦
０，１．０，１２≦Ｃ≦０，３を示す、）で表わされる
ものであり、このうちキューリー温度が２００℃以上の
ものが適している。キューリー温度が２００℃未満であ
ると、使用温度に対する飽和磁束密度の変化率が２０％
以上となり、これにより発振周波数も同様に変化してし
まい実用的でなくなる。The amorphous magnetic metal used in the present invention has the general formula: Ma M' b XC (wherein M represents one or more metals selected from Fe, Co and Ni, and M' is lla, IVa
, Va, ■ represents one or more elements selected from group a, X represents one or more elements selected from B, SL, P, C, Ge, and a+b+c=
1, 0.6≦a+b≦ 0.88, 0.005≦b≦
0,1.0,12≦C≦0,3), and among these, those having a Curie temperature of 200° C. or higher are suitable. When the Curie temperature is less than 200°C, the rate of change in saturation magnetic flux density with respect to the operating temperature is 20%.
As a result, the oscillation frequency also changes, making it impractical.
これは、スイッチング電源における発振周波数ｆは、使
用したトランスの磁心の飽和磁束密度Ｂｓ、断面ＷＩｓ
、巻線数Ｎおよび入力電圧Ｅによって決まり、次式によ
って決定されるものであり、磁心の飽和磁束密度は、キ
ューリー温度、すなわち材質の組成によって決まるため
である。This means that the oscillation frequency f in the switching power supply is the saturation magnetic flux density Bs of the magnetic core of the transformer used, and the cross section WIs
, the number of windings N, and the input voltage E, and is determined by the following equation. This is because the saturation magnetic flux density of the magnetic core is determined by the Curie temperature, that is, the composition of the material.
ＮＢＳ Ｓ
また、このような非晶質磁性金属のうち、特に磁歪の小
さいＣｏ系非晶質磁性金属が適している。NBS S Among such amorphous magnetic metals, Co-based amorphous magnetic metals with low magnetostriction are particularly suitable.
本発明の発振トランス用磁心は、例えば次ぎのようにし
て製造される。The magnetic core for an oscillation transformer of the present invention is manufactured, for example, as follows.
ずなわちまず、非晶質磁心の薄板を巻回して積層し、常
法に従って３５０℃〜５００℃の温度で熱処理を施し、
次いでケースに入れるか樹脂コーティング等の方法によ
り外装することにより完成させる。First, thin plates of amorphous magnetic core are wound and laminated, and heat treated at a temperature of 350°C to 500°C according to a conventional method.
Then, it is completed by placing it in a case or covering it with a method such as resin coating.
（作 用）
本発明の発振トランス用磁心において、特にキューリー
温度が２００℃以上の非晶質磁性金属を使用して発振周
波数における角形比を８０〜９７％の範囲に限定してい
るので、高周波数域において安定した発振が行える。(Function) In the magnetic core for an oscillation transformer of the present invention, an amorphous magnetic metal having a Curie temperature of 200°C or higher is used, and the squareness ratio at the oscillation frequency is limited to a range of 80 to 97%, so that a high Stable oscillation can be performed in the frequency range.
（実施例） 次に、本発明の実施例について説明する。(Example) Next, examples of the present invention will be described.
実施例１〜７
まず、第１表に示す組成の非晶質磁性金属を用いて、そ
れぞれ厚さ１５〜２０μＩ、幅４ 、５ ｍ′ｎの薄板
状リボンとし、これらを所定の巻治具に巻回して積層し
、外径８ｒ＃ｎ ｘ内径θＩＩＩＩＸ高さ ４．５１の
コアを形成した０次いで、窒素ガス雰囲気中において４
００ ’Ｃ〜４５０℃１１０分〜９０分の条件で熱処理
を施した後、樹脂コーティングを行って外装して、第１
表に示す角型比を有する磁心をそれぞれ作製した。Examples 1 to 7 First, thin ribbons with a thickness of 15 to 20 μI and a width of 4 and 5 m'n were made using amorphous magnetic metals having the compositions shown in Table 1, and these were placed in a predetermined winding jig. The core was wound and laminated to form a core of outer diameter 8r#n x inner diameter θIIIX height 4.51. Then, in a nitrogen gas atmosphere,
After heat treatment at 00'C to 450C for 110 minutes to 90 minutes, the first
Each magnetic core having the squareness ratio shown in the table was produced.
（以下余白）
第１表
＊：発振周波数１００ Ｋ）ｌｚにおける角形比なお、
表中の比較例は本発明との比較のために掲げたものであ
り、角形比を９９％に設定して作製した非晶質磁性金属
からなる発振トランス用磁心である。(Left below) Table 1 *: Squareness ratio at oscillation frequency 100K) lz
The comparative example in the table is listed for comparison with the present invention, and is a magnetic core for an oscillation transformer made of an amorphous magnetic metal with a squareness ratio of 99%.
このようにして得たそれぞれの磁心を用いて発振トラン
スを作製し、ジエンセンの発振回路により回路テストを
行った。なお、発振周波数は１００ＫＨ２として行ない
、またテスト中の磁心の平均温度は５０℃であり、最高
温度は７０゛Ｃであった。なお、室温は２５℃であった
。An oscillation transformer was fabricated using each of the magnetic cores obtained in this way, and a circuit test was conducted using a Jensen oscillation circuit. The oscillation frequency was set to 100 KH2, and the average temperature of the magnetic core during the test was 50°C, and the maximum temperature was 70°C. Note that the room temperature was 25°C.
その結果を第２表および第１図に示す。The results are shown in Table 2 and FIG.
なお、第１図は使用した磁心の角型比と回路の効率との
関係を示したグラフである。Note that FIG. 1 is a graph showing the relationship between the squareness ratio of the magnetic core used and the efficiency of the circuit.
第２表
◎：良好 ○：はぼ良好
Ｘ：発振せず
第２表からも明らかなように、この実施例の発振トラン
ス用磁心は、高周波域において安定した発振が行えるこ
とがわかる。また、第１図からこの実施例の発振トラン
ス用磁心は回路効率に優れ、これにより実用的であるこ
ともわかる。Table 2 ◎: Good ○: Very good Further, from FIG. 1, it can be seen that the magnetic core for an oscillation transformer of this embodiment has excellent circuit efficiency and is therefore practical.
また、第２図は使用した非晶質磁性金属のキューリー温
度と飽和磁束密度の１２０℃における変化率を示したも
のであるが、同図より温度変化に対して安定した発振を
行なうには、キューリー温度が２００℃以上必要である
ことがわかる。In addition, Figure 2 shows the Curie temperature and saturation magnetic flux density of the amorphous magnetic metal used at 120°C. It can be seen that a Curie temperature of 200° C. or higher is required.
［発明の効果コ
以上説明したように本発明の発振トランス用磁心によれ
ば、発振周波数における角型比を８０〜９７％に限定す
ることによって、高周波域においても安定した発振が得
られ、これにより電源のさらなる小型化が可能となる。[Effects of the Invention] As explained above, according to the magnetic core for an oscillation transformer of the present invention, by limiting the squareness ratio at the oscillation frequency to 80 to 97%, stable oscillation can be obtained even in the high frequency range. This makes it possible to further downsize the power supply.
第１図は本発明の実施例の発振トランス用磁心の角型比
と回路効率との関係を示したグラフ、第２図は非晶質磁
性金属のキューリー温度と飽和磁束密度の変化率との関
係を示したグラフである。
角形比（％）
第１図
キューリー温度 （０Ｃ）
第２図FIG. 1 is a graph showing the relationship between the squareness ratio of the magnetic core for an oscillation transformer and circuit efficiency according to an embodiment of the present invention, and FIG. 2 is a graph showing the relationship between the Curie temperature of an amorphous magnetic metal and the rate of change in saturation magnetic flux density. This is a graph showing the relationship. Squareness ratio (%) Figure 1 Curie temperature (0C) Figure 2
Claims (2)
ス用磁心であって、発振周波数における角型比が８０〜
９７％であることを特徴とする発振トランス用磁心。(1) A magnetic core for an oscillation transformer consisting of a wound body of an amorphous magnetic thin metal plate, which has a squareness ratio of 80 to 80 at the oscillation frequency.
A magnetic core for an oscillation transformer characterized by a magnetic core of 97%.
上である特許請求の範囲第１項記載の発振トランス用磁
心。(2) The magnetic core for an oscillation transformer according to claim 1, wherein the Curie temperature of the amorphous magnetic metal is 200° C. or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62073539A JPH0760770B2 (en) | 1987-03-27 | 1987-03-27 | Magnetic core for oscillation transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62073539A JPH0760770B2 (en) | 1987-03-27 | 1987-03-27 | Magnetic core for oscillation transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63239907A true JPS63239907A (en) | 1988-10-05 |
| JPH0760770B2 JPH0760770B2 (en) | 1995-06-28 |
Family
ID=13521139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62073539A Expired - Fee Related JPH0760770B2 (en) | 1987-03-27 | 1987-03-27 | Magnetic core for oscillation transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760770B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0590034A (en) * | 1991-09-30 | 1993-04-09 | Toshiba Corp | Magnetic core for oscillation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61295616A (en) * | 1985-06-25 | 1986-12-26 | Matsushita Electric Works Ltd | Electromagnetic device |
-
1987
- 1987-03-27 JP JP62073539A patent/JPH0760770B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61295616A (en) * | 1985-06-25 | 1986-12-26 | Matsushita Electric Works Ltd | Electromagnetic device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0590034A (en) * | 1991-09-30 | 1993-04-09 | Toshiba Corp | Magnetic core for oscillation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0760770B2 (en) | 1995-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0777167B2 (en) | Magnetic core parts | |
| RU2005133713A (en) | MAGNETIC WIRE, METHOD FOR PRODUCING SUCH MAGNET WIRE, FIELD OF APPLICATION OF SUCH MAGNET WIRE, IN PARTICULAR, IN TRANSFORMERS OF CURRENT AND CURRENT-THROTTLE THROTTLES, AS WELL AS | |
| JPH0219179B2 (en) | ||
| US4558297A (en) | Saturable core consisting of a thin strip of amorphous magnetic alloy and a method for manufacturing the same | |
| US6646532B2 (en) | Powder core and reactor using the same | |
| JPS63239907A (en) | Magnetic core for oscillation transformer | |
| WO1994007300A1 (en) | Snubber circuit, switching power-supply, and saturable inductor used for them | |
| JPS62179704A (en) | Fe-based amorphous core excellent in controlling magnetization characteristics | |
| JP2637184B2 (en) | Core for oscillation transformer | |
| JPH0257683B2 (en) | ||
| JP2835127B2 (en) | Magnetic core and manufacturing method thereof | |
| JPS60165705A (en) | Wound magnetic core | |
| JP3121641B2 (en) | Switching power supply | |
| JPS60178610A (en) | Choke coil | |
| JP2001115201A (en) | Alloy powder for high frequency reactor and high frequency reactor using the same | |
| JPH04249301A (en) | Converter | |
| JPS6012423B2 (en) | Manufacturing method of low coercive force and high angularity amorphous alloy | |
| JPS59171110A (en) | Choke coil | |
| JPH0323619B2 (en) | ||
| JP2002075719A (en) | Dust core | |
| JPH0296308A (en) | Reactor for semiconductor circuit | |
| JPH04249302A (en) | High-frequency transformer | |
| JPH03278503A (en) | Bobbin for magnetic core device, and magnetic core device and manufacture thereof | |
| JPH11189803A (en) | Soft magnetic alloy powder | |
| JPS6276604A (en) | Noise filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |