JPS5847817Y2 - coreless motor - Google Patents
coreless motorInfo
- Publication number
- JPS5847817Y2 JPS5847817Y2 JP5343874U JP5343874U JPS5847817Y2 JP S5847817 Y2 JPS5847817 Y2 JP S5847817Y2 JP 5343874 U JP5343874 U JP 5343874U JP 5343874 U JP5343874 U JP 5343874U JP S5847817 Y2 JPS5847817 Y2 JP S5847817Y2
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- permanent magnet
- coreless motor
- magnetic
- fixed
- 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
Links
Landscapes
- Dc Machiner (AREA)
Description
【考案の詳細な説明】
第１図に示すような有底筒状ヨークＡ内に永久磁石Ｂを
空隙ｇを形成せしめて収容固定、その空隙ｇ内に整流子
基台ｄに筒状コイルＬの一端を固着一体化したカップ状
ローターＲを回動自在に嵌挿し、刷子すを有する蓋体Ｇ
をその刷子を整流子りに弾接せしめて冠着したコアレス
モーターにあっては、ヨークに永久磁石を直接取付ける
とヨークによって永久磁石の磁極Ｎ、Ｓの間に閉磁路が
でき、空隙中に配置されているコイルとの鎖交磁束数が
減少するため、これをさけるために従来は第２図に示す
ように、筒状ヨークＡの底面ａと永久磁石Ｂの下端面間
に非磁性体Ｆを介在して永久磁石をヨークに固定してい
た。[Detailed description of the invention] A permanent magnet B is housed and fixed in a bottomed cylindrical yoke A as shown in FIG. A lid body G having a brush plate, into which a cup-shaped rotor R having one end fixed and integrated is rotatably inserted.
In a coreless motor in which the brush is crowned by making elastic contact with the commutator, when a permanent magnet is directly attached to the yoke, a closed magnetic path is created by the yoke between the magnetic poles N and S of the permanent magnet, and a magnetic field is formed in the air gap. Since the number of magnetic flux linkages with the arranged coils decreases, in order to avoid this, conventionally, as shown in FIG. The permanent magnet was fixed to the yoke via F.
本考案は筒状ヨークの底部に孔を設けて磁気抵抗を増大
させ、永久磁石をヨーク底面に直接取付けても永久磁石
の特性が低下しないようにして、非磁性体を不要にした
ものである。This invention creates a hole in the bottom of the cylindrical yoke to increase magnetic resistance, so that even if the permanent magnet is attached directly to the bottom of the yoke, the characteristics of the permanent magnet will not deteriorate, thereby eliminating the need for non-magnetic material. .
第３図乃至第７図は本考案によるヨークと永久磁石の配
置を示した実施例で、Ａは筒状ヨークで１はその底面又
は底部近傍に形成した孔、Ｂは永久磁石である、３は異
方性磁石に設けたエヤーギャップで磁極Ｎ、Ｓから出力
する磁束の磁路の磁気抵抗を増大させるためのものであ
る、底面に設けた小孔４は永久磁石Ｂの磁極Ｎ、Ｓの境
界の磁気抵抗を増加させて永久磁石を取付けるためにヨ
ークの機械強度も損わないようにするためのものである
。3 to 7 are embodiments showing the arrangement of the yoke and permanent magnet according to the present invention, where A is a cylindrical yoke, 1 is a hole formed at or near the bottom of the yoke, B is a permanent magnet, 3 is an air gap provided in the anisotropic magnet to increase the magnetic resistance of the magnetic path of the magnetic flux output from the magnetic poles N and S. The small holes 4 provided on the bottom are the air gaps provided in the magnetic poles N and S of the permanent magnet B. This is to increase the magnetic resistance at the boundary of the yoke so as not to damage the mechanical strength of the yoke in order to attach a permanent magnet.
本考案は上記のようにすることにより永久磁石とヨーク
間の非磁性体を必要とせず、部品点数を減らすことがで
きその分だけ組立を簡素化できると共に高さを低くでき
、コンパクトなコアレスモーターが得られる実用的効果
がある。By doing the above, the present invention eliminates the need for a non-magnetic material between the permanent magnet and the yoke, reducing the number of parts, simplifying assembly, and lowering the height, resulting in a compact coreless motor. There are practical effects that can be obtained.
第１図は従来例の構成国、第２図は従来の永久磁石のヨ
ークえの取付は固定状態を示す縦断面図、第３図は本考
案による永久磁石のヨークえの取付は固定状態を示す縦
断面図、第４図乃至第７図は本考案の異なる実施例を示
す横断面図である。
主要な部分の符号説明 Ａは筒状ヨーク、１は孔、Ｂは
永久磁石。Figure 1 shows the configuration of the conventional example, Figure 2 is a longitudinal cross-sectional view showing the fixed state of the conventional permanent magnet yoke mounting, and Figure 3 shows the fixed state of the permanent magnet yoke mounting of the present invention. The longitudinal cross-sectional views shown in FIGS. 4 to 7 are cross-sectional views showing different embodiments of the present invention. Explanation of symbols for main parts: A is a cylindrical yoke, 1 is a hole, and B is a permanent magnet.
Claims (1)
久磁石をヨーク底面に直接取付は固定して成るコアレス
モーターA coreless motor that has a hole in the bottom of a cylindrical yoke to increase magnetic resistance, and a permanent magnet that is directly attached or fixed to the bottom of the yoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5343874U JPS5847817Y2 (en) | 1974-05-10 | 1974-05-10 | coreless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5343874U JPS5847817Y2 (en) | 1974-05-10 | 1974-05-10 | coreless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS50141723U JPS50141723U (en) | 1975-11-21 |
| JPS5847817Y2 true JPS5847817Y2 (en) | 1983-10-31 |
Family
ID=28202167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5343874U Expired JPS5847817Y2 (en) | 1974-05-10 | 1974-05-10 | coreless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5847817Y2 (en) |
-
1974
- 1974-05-10 JP JP5343874U patent/JPS5847817Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS50141723U (en) | 1975-11-21 |
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