JP2564851B2 - Field structure of linear DC brushless motor - Google Patents
Field structure of linear DC brushless motorInfo
- Publication number
- JP2564851B2 JP2564851B2 JP62247993A JP24799387A JP2564851B2 JP 2564851 B2 JP2564851 B2 JP 2564851B2 JP 62247993 A JP62247993 A JP 62247993A JP 24799387 A JP24799387 A JP 24799387A JP 2564851 B2 JP2564851 B2 JP 2564851B2
- Authority
- JP
- Japan
- Prior art keywords
- field
- linear
- brushless motor
- magnetic plate
- magnets
- 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 - Lifetime
Links
Landscapes
- Linear Motors (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、リニアDCブラシレスモータの界磁構造、
特に界磁永久磁石の配列に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a field structure of a linear DC brushless motor,
In particular, it relates to the arrangement of field permanent magnets.
［従来の技術］ リニアアクチュエータのサーボ制御や精密位置決めの
要求が多くなってきているが、そのような用途に適した
リニアモータとしてリニアDCブラシレスモータが注目さ
れている。[Prior Art] Although there are increasing demands for servo control and precise positioning of linear actuators, linear DC brushless motors are receiving attention as linear motors suitable for such applications.
リニアDCブラシレスモータ（以下LDMと略記する）は
通常のDCブラシレスモータ（ACサーボモータ）を線形に
展開した原理、構造のものである。このLDMはアーマチ
ュア側と界磁側よりなっているが、界磁側は第３図に示
すように磁性板１と、この上に所定のピッチでＮ・Ｓ極
を交互に配列した永久磁石より成る複数の界磁磁石２よ
り構成されている。また、前記界磁磁石２はこの図に示
すように斜めに配置されている。これはこの界磁磁石２
によるディテント推力を低減するためスキュー効果を持
たせているからである。A linear DC brushless motor (hereinafter abbreviated as LDM) has a principle and structure in which a normal DC brushless motor (AC servo motor) is linearly developed. This LDM is composed of an armature side and a field side. On the field side, as shown in FIG. It is composed of a plurality of field magnets 2. The field magnets 2 are arranged obliquely as shown in this figure. This is this field magnet 2
This is because the skew effect is provided to reduce the detent thrust due to.
［発明が解決しようとする問題点］ 前記のような界磁構造において、ディテント推力を十
分低減し、LDMの安定走行を得るには、界磁磁石の配置
とスキュー角が正確でなければならない。つまり、隣り
合う２個の界磁磁石の極ピッチは所定の寸法でなければ
ならず、これらの界磁磁石間の隙間は適切でなければな
らない。[Problems to be Solved by the Invention] In the field structure as described above, in order to sufficiently reduce the detent thrust and obtain stable running of the LDM, the arrangement of the field magnets and the skew angle must be accurate. That is, the pole pitch of two adjacent field magnets must have a predetermined size, and the gap between these field magnets must be appropriate.
しかし、平面状の磁性板の上に界磁磁石を並べて接着
する場合、この界磁磁石相互の吸引力やこの界磁磁石と
前記磁性板との吸引力などが存在するため、界磁磁石の
極ピッチや角度・前記磁石間の隙間などを正確にするの
は非常に困難である。However, when arranging and bonding the field magnets on the flat magnetic plate, there is an attraction force between the field magnets and an attraction force between the field magnets and the magnetic plate. It is very difficult to make the pole pitch, the angle and the gap between the magnets accurate.
この発明はこの点を解決するためになされたもので、
簡単で正確に磁性板上に界磁磁石が配列できるLDMの界
磁構造を得ようとするものである。The present invention has been made to solve this point,
The purpose is to obtain an LDM field structure in which field magnets can be arranged on a magnetic plate easily and accurately.
［問題を解決するための手段］ そこでこの発明では、各界磁磁石の配列位置に合わせ
て磁性板に孔を開け、この孔にピンを立設し、このピン
の位置に合わせて前記界磁磁石を接着することにより、
これらの界磁磁石の正確な配列をおこない、前記問題を
解決するものである。[Means for Solving the Problem] Therefore, in the present invention, a hole is made in the magnetic plate in accordance with the arrangement position of each field magnet, a pin is erected in this hole, and the field magnet is aligned with the position of this pin. By gluing
The field magnets are accurately arranged to solve the above problem.
［実施例］ 第１図および第２図はこの発明による一実施例を示す
もので、第１図は平面図、第２図は第１図のＡ−Ａ断面
図を示す。図中１は磁性板で、この上に永久磁石より成
る界磁磁石２が所定の間隔で接着されている。３はスプ
リングピンで、前記複数の界磁磁石２が正確に位置決め
できるように前記磁性板１に孔1aを開け、この孔1aに立
設されている。また、このスプリングピンの高さは、前
記界磁磁石の厚みより短く設定されている。[Embodiment] FIGS. 1 and 2 show an embodiment according to the present invention. FIG. 1 is a plan view and FIG. 2 is a sectional view taken along line AA of FIG. In the figure, 1 is a magnetic plate, on which field magnets 2 made of permanent magnets are adhered at a predetermined interval. A spring pin 3 is provided with a hole 1a in the magnetic plate 1 so that the plurality of field magnets 2 can be accurately positioned, and is provided upright in the hole 1a. The height of the spring pin is set shorter than the thickness of the field magnet.
この様な構成の界磁側と図示しないアーマチュアより
成るLDMに通電すると、公知の作用により推力を発生
し、このLDMは動作する。When the LDM including the field side and the armature (not shown) having such a structure is energized, a thrust is generated by a known action, and the LDM operates.
なお、前記スプリングピンは、漏れ磁束を抑えること
ができ、簡単に立設できれば他の部材に代替えしても良
い。The spring pin may be replaced with another member as long as it can suppress leakage flux and can be easily erected.
［発明の効果］ 以上説明したようにこの発明によれば、磁性板上にス
プリングピンを設けることにより、界磁永久磁石の配置
が所定の極ピッチ，角度で正確におこなえる。また、こ
の永久磁石相互の吸引力が生じても、スプリングピンの
存在により隣り合う永久磁石が接触することもない。さ
らに、スプリングピンであるために孔径の精度も必要な
く、中実でなく中空であるため、漏れ磁束も最少限に押
さえることができる。よって、ディテント推力を十分に
低減し、安定なLDMの走行ができるという利点を有す
る。[Effects of the Invention] As described above, according to the present invention, by providing the spring pins on the magnetic plate, the field permanent magnets can be accurately arranged at a predetermined pole pitch and angle. Further, even if the attraction force between the permanent magnets is generated, the adjacent permanent magnets do not come into contact with each other due to the existence of the spring pin. Further, since it is a spring pin, it does not require precision of the hole diameter, and since it is hollow rather than solid, the leakage magnetic flux can be suppressed to a minimum. Therefore, there is an advantage that the detent thrust is sufficiently reduced and stable LDM traveling is possible.
第１図はこの発明の一実施例を示すLDMの界磁構造の平
面図，第２図は第１図のＡ−Ａ断面図であり、第３図は
従来のLDMの界磁構造を示す平面図である。 １……磁性板、２……界磁永久磁石 ３……スプリングピンFIG. 1 is a plan view of a field structure of an LDM showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 shows a field structure of a conventional LDM. It is a top view. 1 ... Magnetic plate, 2 ... Field permanent magnet 3 ... Spring pin
Claims (1)
た複数の界磁永久磁石よりなるリニアDCブラシレスモー
タの界磁体において、前記永久磁石の位置決めを行うた
めに前記磁性板にピンを所定間隔で立設したことを特徴
とするリニアDCブラシレスモータの界磁構造。1. In a field body of a linear DC brushless motor, which comprises a magnetic plate and a plurality of field permanent magnets arranged at predetermined intervals on the magnetic plate, pins are attached to the magnetic plate for positioning the permanent magnet. A field structure for a linear DC brushless motor, which is characterized by being installed upright at regular intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62247993A JP2564851B2 (en) | 1987-10-02 | 1987-10-02 | Field structure of linear DC brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62247993A JP2564851B2 (en) | 1987-10-02 | 1987-10-02 | Field structure of linear DC brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0191652A JPH0191652A (en) | 1989-04-11 |
| JP2564851B2 true JP2564851B2 (en) | 1996-12-18 |
Family
ID=17171596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62247993A Expired - Lifetime JP2564851B2 (en) | 1987-10-02 | 1987-10-02 | Field structure of linear DC brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2564851B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002199694A (en) * | 2000-12-27 | 2002-07-12 | Yaskawa Electric Corp | Field structure of linear motor |
| DE102013004322A1 (en) | 2012-03-19 | 2013-09-19 | Fanuc Corporation | Magnetic plate for a linear motor for preventing misalignment of magnets |
-
1987
- 1987-10-02 JP JP62247993A patent/JP2564851B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002199694A (en) * | 2000-12-27 | 2002-07-12 | Yaskawa Electric Corp | Field structure of linear motor |
| DE102013004322A1 (en) | 2012-03-19 | 2013-09-19 | Fanuc Corporation | Magnetic plate for a linear motor for preventing misalignment of magnets |
| DE102013004322B4 (en) | 2012-03-19 | 2021-09-16 | Fanuc Corporation | Magnetic plate for a linear motor to prevent misalignment of magnets |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0191652A (en) | 1989-04-11 |
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