JPH03112356A - Pole teeth structure of claw pole type yoke for steeping motor - Google Patents
Pole teeth structure of claw pole type yoke for steeping motorInfo
- Publication number
- JPH03112356A JPH03112356A JP24514989A JP24514989A JPH03112356A JP H03112356 A JPH03112356 A JP H03112356A JP 24514989 A JP24514989 A JP 24514989A JP 24514989 A JP24514989 A JP 24514989A JP H03112356 A JPH03112356 A JP H03112356A
- Authority
- JP
- Japan
- Prior art keywords
- pole teeth
- teeth
- yoke
- pole
- stator
- 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
- 210000000078 claw Anatomy 0.000 title claims description 4
- 239000002184 metal Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は２相ＰＭ（永久磁石）形のステッピングモー
タに関し、特に、ステータを構成するクローポール形ヨ
ークの極歯構造の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a two-phase PM (permanent magnet) stepping motor, and more particularly to an improvement in the pole tooth structure of a claw pole yoke constituting a stator.
（従来の技術）
この発明の対象である２相ＰＭ形ステッピングモータの
全体的な構成を第３図および第４図に示している。両図
に示すように、はぼ同一構成の２相分のヨークユニット
１と２でもって円筒状のステータの主要部が構成されて
いる。ヨークユニット１は板金部品である外ヨーク部品
３と中ヨーク部品４を組み合わせることでコイル５を収
納するドーナツ形の空間が形成されているとともに、そ
の内周部には外ヨーク部品３および中ヨーク部品４にそ
れぞれ形成された極歯３ ａ ｓ ４ ａが交互に向か
い合って非接触の噛み合い状態に配置されている。ヨー
クユニット２も同じ構成で、外ヨーク部品６と中ヨーク
部品７を組み合わすことで形成されたドーナツ形の空間
内にコイル８が収納され、その内周部において、外ヨー
ク部品６の極歯６ａと中ヨーク部品７の極歯７ａが交互
に向い合って非接触状態の噛み合い状態に配置されてい
る。ロータ９は多極着磁された円筒形の永久磁石９ｂの
中心にロータ軸９ａを取り付けたもので、前記ステ７タ
の内周部にロータ９が配置され、ヨークユニット１に固
着された前フランジ１０の軸受１１とヨークユニット２
に固着された後フランジ１２の軸受１３とでロータ９が
軸支されている。(Prior Art) The overall structure of a two-phase PM type stepping motor, which is the object of the present invention, is shown in FIGS. 3 and 4. As shown in both figures, the main part of the cylindrical stator is constituted by two phase yoke units 1 and 2 having almost the same configuration. The yoke unit 1 is formed by combining an outer yoke part 3 and a middle yoke part 4, which are sheet metal parts, to form a doughnut-shaped space in which a coil 5 is housed. The pole teeth 3 a s 4 a formed on the component 4 are arranged alternately facing each other in a non-contact meshing state. The yoke unit 2 also has the same configuration, with the coil 8 housed in a donut-shaped space formed by combining the outer yoke part 6 and the middle yoke part 7, and the pole teeth of the outer yoke part 6 on the inner periphery. 6a and the pole teeth 7a of the middle yoke component 7 are arranged to alternately face each other and mesh in a non-contact state. The rotor 9 has a rotor shaft 9a attached to the center of a multi-pole magnetized cylindrical permanent magnet 9b. Bearing 11 of flange 10 and yoke unit 2
The rotor 9 is pivotally supported by a bearing 13 of a rear flange 12 fixed to the rear flange 12 .
なお、この種のステッピングモータについては「やさし
く学ぶステッピングモータと使い方」（総合電子出版社
）に詳しく解説されている。This type of stepping motor is explained in detail in ``Easy Learning of Stepping Motors and How to Use'' (Sogo Denshi Publishing).
（発明が解決しようとする課題）
前述したような構成の従来の２相ＰＭ形ステッピングモ
ータでは、以下に述べるような理由により磁気的効率が
低くなっており、そのため出力特性の効率が低いという
問題があった。(Problems to be Solved by the Invention) In the conventional two-phase PM type stepping motor having the configuration described above, the magnetic efficiency is low due to the reasons described below, and as a result, there is a problem that the efficiency of the output characteristics is low. was there.
第４図に示すように、各ヨーク部品３．４．６．７に形
成されている極歯３ ａ ｓ ４ ａ ％ ６ ａ ｓ
７ ａは全て同一寸法、同一形状になっている。また
、第３図に示すように、軸受１１．１３の配置やその他
の理由により、ロータ９の永久磁石９ｂの実効長Ｂはス
テータ磁気回路の実効長（ヨークユニット１と２を合せ
た実効長）より少し小さく、ロータ永久磁石９ｂの両端
部分にそれぞれ長さｄの無効エリアが存在する。As shown in FIG. 4, the pole teeth 3.4.6.7 formed on each yoke part 3.4.6.7
7a all have the same dimensions and the same shape. Furthermore, as shown in Fig. 3, due to the arrangement of the bearings 11, 13 and other reasons, the effective length B of the permanent magnets 9b of the rotor 9 is the effective length of the stator magnetic circuit (the effective length of the yoke units 1 and 2 combined). ), and there are invalid areas of length d at both ends of the rotor permanent magnet 9b.
中ヨーク部品４．７の極歯４ａ、７ａはヨークユニット
１と２の接合面側からステータの両端面側に突出してお
り、これを外向き極歯４ ａ ｓ ７ ａと称すること
にする。これに対し、外ヨーク部品３．６の極歯３ａｓ
６ａはステータ両端面側がらヨークユニット１と２の接
合面側に突出しており、これを内向き極歯３ ａ ％
６ ａと称する。The pole teeth 4a, 7a of the middle yoke component 4.7 protrude from the joining surface of the yoke units 1 and 2 to both end surfaces of the stator, and will be referred to as outward pole teeth 4a s 7 a. On the other hand, the pole tooth 3as of the outer yoke part 3.6
6a protrudes from both end surfaces of the stator toward the joining surface of yoke units 1 and 2, and is connected to the inward pole tooth 3a%.
It is called 6a.
ここで外向き極歯４ ａ ｚ ７ ａはその全面積にわ
たってロータ永久磁石９ｂの外周に近接して対向してい
るのに対し、永久磁石９ｂの両端部に前述した長さｄの
無効エリアが存在するために、内向き極歯３ａ、６ａの
根元部分は永久磁石９ｂの外周に近接対向しておらず、
磁石９ｂとの対向面積は外向き極歯４ａ、７ａより小さ
くなっている。Here, the outward facing pole teeth 4 a z 7 a face close to the outer periphery of the rotor permanent magnet 9 b over their entire area, whereas the above-mentioned ineffective area of length d is located at both ends of the permanent magnet 9 b. Because of this, the root portions of the inwardly facing pole teeth 3a, 6a do not closely face the outer periphery of the permanent magnet 9b.
The area facing the magnet 9b is smaller than that of the outward pole teeth 4a, 7a.
このことがモータ全体としての磁気回路の効率低下の一
つの要因になっており、高効率で高トルクのモータを実
現する上での障害になっている。This is one of the factors that reduces the efficiency of the magnetic circuit of the motor as a whole, and is an obstacle to realizing a high-efficiency, high-torque motor.
この発明は前述した従来の問題点に鑑みなされたもので
、その目的は、ロータ磁石の有効長がステータ有効長よ
り短くても、できる限り磁気回路の効率を高くして高効
率で高トルクのモータを実現できるようにすることにあ
る。This invention was made in view of the above-mentioned conventional problems, and its purpose is to increase the efficiency of the magnetic circuit as much as possible to achieve high efficiency and high torque even if the effective length of the rotor magnet is shorter than the effective length of the stator. The goal is to make the motor possible.
（課題を解決するための手段）
そこでこの発明では、前述したような基本構成の２相Ｐ
Ｍ形ステッピングモータにおいて、ステータの両端面側
から両ヨークユニットの接合面側に突出している極歯（
内向き極歯）の突出長さを両ヨークユニットの接合面側
からステータの両端面側に突出している極歯（外向き極
歯）の突出長さより大きくした。(Means for solving the problem) Therefore, in this invention, a two-phase P of the basic configuration as described above is used.
In an M-type stepping motor, the pole teeth (
The protruding length of the inwardly facing pole teeth) was made larger than the protruding length of the pole teeth (outwardly facing pole teeth) protruding from the joint surface side of both yoke units to both end faces of the stator.
（作 用）
内向き極歯の長さを外向き極歯より長くしたことで、内
向き極歯とロータ永久磁石との近接対向面積を増大させ
、外向き極歯とロータ永久磁石との対向面積と等しくす
ることができる。(Function) By making the length of the inward facing pole teeth longer than the outward facing pole teeth, the area of close facing between the inward facing pole teeth and the rotor permanent magnet is increased, and the facing area of the outward facing pole teeth and the rotor permanent magnet is increased. It can be made equal to the area.
（実施例）
第３図に示したモータの断面図は本発明の実施例にも共
通するものであり、また第４図の部分破断斜視図も以下
に説明する点を除いて本発明の実施例とほぼ共通するも
のである。(Embodiment) The sectional view of the motor shown in FIG. 3 is common to the embodiment of the present invention, and the partially cutaway perspective view of FIG. This is almost the same as the example.
本実施例では、先に詳しく説明した従来の２相ＰＭ形ス
テッピングモータの構成において、内向き極歯３ａ、６
ａの寸法、形状を外向き極歯４ａ。In this embodiment, inward pole teeth 3a, 6
The dimensions and shape of a are the outward facing pole teeth 4a.
７ａと異ならせた点を特徴とするものである。It is characterized by being different from 7a.
第１図および第２図に本発明の特徴部分を抽出して具体
的に示している。両図のように、外ヨーク部品３．６に
形成された内向き極歯３ａ、６ａの突出長さＬｌを、中
ヨーク部品４．７に形成された外向き極歯４ ａ ｓ
７ ａの突出長さＬ２より大きく形成している。前述の
ように、内向き極歯３ａ ％ ６ ａの根元部分は第３
図の無効エリアｄがあるためにロータ永久磁石９ｂと対
向しないが、ＬｌをＬ２より長くすることで内向き極歯
３ａ１６ａと磁石９ｂとの対向面積を外向き極歯４ａ、
７ａのそれと等しくなるように構成している。FIG. 1 and FIG. 2 specifically show characteristic parts of the present invention. As shown in both figures, the protrusion length Ll of the inwardly facing pole teeth 3a, 6a formed on the outer yoke part 3.6 is the same as that of the outwardly facing pole tooth 4a s formed on the middle yoke part 4.7.
7a is formed to be larger than the protrusion length L2. As mentioned above, the root part of the inward facing pole tooth 3a%6a is the third
Due to the invalid area d in the figure, they do not face the rotor permanent magnet 9b, but by making Ll longer than L2, the opposing area between the inward pole tooth 3a16a and the magnet 9b is reduced to the outward pole tooth 4a,
It is configured to be equal to that of 7a.
（発明の効果）
以上詳細に説明したように、この発明によれば、ヨーク
ユニットを構成する外ヨーク部品と中ヨーク部品に形成
する極歯の寸法、形状を少し変更するという極めて簡単
な手段により、ロータ永久磁石と各極歯の対向面積を等
しくすることができ、これによってモータ全体としての
磁気回路の効率が向上し、従来より高効率で高トルクの
モータを実現することができる。(Effects of the Invention) As described above in detail, according to the present invention, the size and shape of the pole teeth formed on the outer yoke parts and the middle yoke parts constituting the yoke unit are slightly changed. , the facing area of the rotor permanent magnet and each pole tooth can be made equal, thereby improving the efficiency of the magnetic circuit of the motor as a whole, and realizing a motor with higher efficiency and higher torque than before.
第１図は本発明の一実施例における要部構成である極歯
部分の展開図、第２図は同じ実施例における１つのヨー
クユニットの極歯部分の斜視図、第３図は本発明の実施
例および従来に共通する構成を表現した２相ＰＭ形ステ
ッピングモータの断面図、第４図は従来の２相ＰＭ形ス
テッピングモータの一部切欠き断面図である。
１．２・・・・・・・・・ヨークユニット３．６・・・
・・・・・・外ヨーク部品（板金部品）３ａ、５ａ・・
・内向き極歯
４．７・・・・・・・・・中ヨーク部品４ａ、７ａ・・
・外向き極歯
５・・・・・・・・・コイル
９・・・・・・・・・ロータ
９ｂ・・・・・・永久磁石
（板金部品）FIG. 1 is a developed view of a pole tooth portion which is the main structure of an embodiment of the present invention, FIG. 2 is a perspective view of a pole tooth portion of one yoke unit in the same embodiment, and FIG. FIG. 4 is a cross-sectional view of a two-phase PM type stepping motor showing a configuration common to the embodiment and the conventional one. FIG. 4 is a partially cutaway cross-sectional view of a conventional two-phase PM type stepping motor. 1.2...Yoke unit 3.6...
...Outer yoke parts (sheet metal parts) 3a, 5a...
・Inward pole teeth 4.7...Middle yoke parts 4a, 7a...
・Outward pole teeth 5... Coil 9... Rotor 9b... Permanent magnet (sheet metal parts)
Claims (1)
するドーナツ形の空間が形成されるとともに、その内周
部には両板金部品に形成された極歯が交互に向い合って
非接触の噛み合い状態に配置される組み立て品を１相分
のクローポール形ヨークユニットとし、２個のヨークユ
ニットを接合してステータが構成される２相ＰＭ形ステ
ッピングモータにおいて、ステータの両端面側から両ヨ
ークユニットの接合面側に突出している極歯の突出長さ
が、両ヨークユニットの接合面側からステータの両端面
側に突出している極歯の突出長さより大きいことを特徴
とするステッピングモータのクローポール形ヨークの極
歯構造。By combining the two sheet metal parts, a donut-shaped space is formed to accommodate the coil, and at the inner periphery, the pole teeth formed on both sheet metal parts alternately face each other, creating a non-contact meshing state. In a two-phase PM stepping motor where the assembled product is a claw pole type yoke unit for one phase and the stator is constructed by joining two yoke units, both yoke units can be connected from both end faces of the stator. A claw pole type stepping motor characterized in that the protruding length of the pole teeth protruding toward the joint surface side is greater than the protruding length of the pole teeth protruding from the joint surface side of both yoke units to both end surfaces of the stator. Polar tooth structure of the yoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24514989A JP2796138B2 (en) | 1989-09-22 | 1989-09-22 | Polar tooth structure of claw pole type yoke of stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24514989A JP2796138B2 (en) | 1989-09-22 | 1989-09-22 | Polar tooth structure of claw pole type yoke of stepping motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03112356A true JPH03112356A (en) | 1991-05-13 |
| JP2796138B2 JP2796138B2 (en) | 1998-09-10 |
Family
ID=17129352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24514989A Expired - Fee Related JP2796138B2 (en) | 1989-09-22 | 1989-09-22 | Polar tooth structure of claw pole type yoke of stepping motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2796138B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7339292B2 (en) | 2003-09-22 | 2008-03-04 | Japan Servo Co., Ltd | Motor having shifted teeth of pressed powder construction |
| JP2008187851A (en) * | 2007-01-31 | 2008-08-14 | Fdk Corp | Stepping motor |
| US7449805B2 (en) | 2005-10-09 | 2008-11-11 | Seiko Instruments Inc. | Stepping motor and electronic apparatus |
| US7646121B2 (en) | 2005-10-09 | 2010-01-12 | Seiko Instruments Inc. | Bobbin-less stepping motor and electronic apparatus |
| WO2010106750A1 (en) * | 2009-03-18 | 2010-09-23 | 日本電産サンキョー株式会社 | Stepping motor |
| WO2010106751A1 (en) * | 2009-03-18 | 2010-09-23 | 日本電産サンキョー株式会社 | Stepping motor |
-
1989
- 1989-09-22 JP JP24514989A patent/JP2796138B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7339292B2 (en) | 2003-09-22 | 2008-03-04 | Japan Servo Co., Ltd | Motor having shifted teeth of pressed powder construction |
| US7385321B2 (en) | 2003-09-22 | 2008-06-10 | Japan Servo Co., Ltd. | Motor having shifted teeth of pressed powder construction |
| US7449805B2 (en) | 2005-10-09 | 2008-11-11 | Seiko Instruments Inc. | Stepping motor and electronic apparatus |
| US7646121B2 (en) | 2005-10-09 | 2010-01-12 | Seiko Instruments Inc. | Bobbin-less stepping motor and electronic apparatus |
| JP2008187851A (en) * | 2007-01-31 | 2008-08-14 | Fdk Corp | Stepping motor |
| WO2010106751A1 (en) * | 2009-03-18 | 2010-09-23 | 日本電産サンキョー株式会社 | Stepping motor |
| WO2010106750A1 (en) * | 2009-03-18 | 2010-09-23 | 日本電産サンキョー株式会社 | Stepping motor |
| CN101990735A (en) * | 2009-03-18 | 2011-03-23 | 日本电产三协株式会社 | Stepping motor |
| CN101990734A (en) * | 2009-03-18 | 2011-03-23 | 日本电产三协株式会社 | Stepping motor |
| US7977828B2 (en) | 2009-03-18 | 2011-07-12 | Nidec Sankyo Corporation | Stepping motor |
| US8344561B2 (en) | 2009-03-18 | 2013-01-01 | Nidec Sankyo Corporation | Stepping motor with first pole teeth and second pole teeth alternately disposed |
| JP5185386B2 (en) * | 2009-03-18 | 2013-04-17 | 日本電産サンキョー株式会社 | Stepping motor |
| JP5185385B2 (en) * | 2009-03-18 | 2013-04-17 | 日本電産サンキョー株式会社 | Stepping motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2796138B2 (en) | 1998-09-10 |
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