JPH10285895A - Rotor of brushless motor - Google Patents
Rotor of brushless motorInfo
- Publication number
- JPH10285895A JPH10285895A JP9098276A JP9827697A JPH10285895A JP H10285895 A JPH10285895 A JP H10285895A JP 9098276 A JP9098276 A JP 9098276A JP 9827697 A JP9827697 A JP 9827697A JP H10285895 A JPH10285895 A JP H10285895A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- sensor
- rotor
- brushless motor
- driving
- 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
Links
Landscapes
- Brushless Motors (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は家庭用エアコン等送
風ファン駆動源として用いられるブラシレスモ−タのロ
−タに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless motor rotor used as a drive source for a blower fan such as a home air conditioner.
【０００２】[0002]
【従来の技術】近年家庭用エアコン等空調機器において
は、コンプレッサの能力制御をすることが主流となって
いる。そしてこれに対応して熱交換機への送風量も幅広
く多段階に調整することが要求され、これら要望を満た
すものとして従来から使われてきたファン駆動源として
の誘導電動機に変わって、速度調整の容易なブラシレス
モ−タを直流電源で運転する方式が採用されている。従
来のブラシレスモ−タは図３のブラシレスモ−タの半断
面図に示すような構造であり、プリント配線板と、コイ
ルを施したステ−タコアとを電気絶縁性を有する合成樹
脂で一体に形成し、静音化、小型化を図っている。以下
従来のブラシレスモ−タの例について、図面に基づき説
明する。図３は、従来のブラシレスモ−タの半断面図で
ある。ステ−タコア１に絶縁層２を介してコイル３を施
し、一方プリント配線板４には位置検出素子であるセン
サ５を装着した面をステ−タコア１端面に対向して保持
するとともに、ステ−タコア１、コイル３、センサ５を
装着したプリント配線板４を電気絶縁性を有する合成樹
脂６で一体的に成形固化してステ−タを形成している。2. Description of the Related Art In recent years, in air conditioners such as home air conditioners, controlling the capacity of a compressor has become the mainstream. In response to this, it is required to adjust the amount of air blown to the heat exchanger in a wide range in multiple stages, and instead of the induction motor as a fan drive source that has been used conventionally to satisfy these demands, speed adjustment is required. An easy brushless motor is operated by a DC power supply. The conventional brushless motor has a structure as shown in a half sectional view of the brushless motor in FIG. 3, in which a printed wiring board and a stator core provided with a coil are integrally formed of synthetic resin having electrical insulation. It is formed to reduce noise and reduce size. Hereinafter, an example of a conventional brushless motor will be described with reference to the drawings. FIG. 3 is a half sectional view of a conventional brushless motor. The coil 3 is applied to the stator core 1 via the insulating layer 2, while the surface of the printed wiring board 4 on which the sensor 5 as the position detecting element is mounted is held facing the end face of the stator core 1, and The printed wiring board 4 on which the core 1, the coil 3, and the sensor 5 are mounted is integrally molded and solidified with a synthetic resin 6 having electrical insulation to form a stator.
【０００３】一方、ロ−タ７はステ−タの内周に位置
し、両端を軸受８を介して、ステ−タとブラケット９に
それぞれ回転自在に支持されている。ロ−タ７は回転軸
１０に磁性体のヨ−クが嵌着され、その外周に駆動用マ
グネット１１を接着固定している。また回転軸１０の一
端には、ロ−タ７の回転位置を検出するセンサ用マグネ
ット１２が取付部材１３を介して固定されている。該セ
ンサマグネットと対向して、プリント配線板４に磁気検
出素子であるセンサ５を配置し、前記センサマグネット
１２とセンサ５とでロ−タ７の回転位置を検出してい
た。On the other hand, the rotor 7 is located on the inner periphery of the stator, and both ends thereof are rotatably supported by the stator and the bracket 9 via bearings 8. The rotor 7 has a yoke made of a magnetic material fitted on the rotating shaft 10 and a driving magnet 11 adhered and fixed to the outer periphery thereof. A sensor magnet 12 for detecting the rotational position of the rotor 7 is fixed to one end of the rotating shaft 10 via a mounting member 13. A sensor 5 as a magnetic detection element is disposed on the printed wiring board 4 so as to face the sensor magnet, and the rotational position of the rotor 7 is detected by the sensor magnet 12 and the sensor 5.
【０００４】[0004]
【発明が解決しようとする課題】前記ブラシレスモ−タ
のロ−タはモ−タ駆動用マグネットとセンサ用マグネッ
トの形状の違う物を各１つ使用している。また、駆動用
とセンサ用が同一マグネットであってもその形状はセン
サが置かれる位置がステ−タのコア内径より大きいため
円柱状である。この発明は前記の欠点を除去するため
に、駆動用とセンサ用のマグネットを一体化し、かつ、
センサの位置をステ−タコアの内径より内側とし、コイ
ルによる磁界の影響を避けると共に、ロ−タのヨ−クま
たはそれに代るものに接着等の取り付けを容易にするよ
うに釣鐘状の段付きプラスチックマグネットを作成す
る。As for the rotor of the brushless motor, one each having a different shape of a motor driving magnet and a sensor magnet is used. Even if the same magnet is used for driving and for the sensor, the shape of the magnet is cylindrical because the position where the sensor is placed is larger than the inner diameter of the core of the stator. The present invention integrates drive and sensor magnets in order to eliminate the above-mentioned disadvantages, and
The position of the sensor is located inside the inner diameter of the stator core, and a bell-shaped step is provided to avoid the influence of the magnetic field due to the coil and to facilitate attachment of the rotor to the yoke or its substitute, such as bonding. Create a plastic magnet.
【０００５】[0005]
【課題を解決するための手段】この発明は、上記従来の
問題点を解決するために、駆動用マグネットはステ−タ
コアの内径より内側とし、センサ用マグネットとの径を
異ならせて段付きの釣鐘状のプラスチックマグネットと
した。According to the present invention, in order to solve the above-mentioned conventional problems, the driving magnet is set inside the inner diameter of the stator core, and the diameter of the driving magnet is made different from that of the sensor magnet so as to be stepped. A bell-shaped plastic magnet was used.
【０００６】[0006]
【発明の実施の形態】以上の構成により、ロ−タヨ−ク
とセンサに近接する位置の回転子の軸に固定された取付
部材に接着にて段付きの釣鐘状に一体成形されたプラス
チックマグネットを固定させてブラシレスモ−タのロ−
タを形成する。DESCRIPTION OF THE PREFERRED EMBODIMENTS With the above construction, a plastic magnet integrally formed in a stepped bell shape by bonding to a mounting member fixed to a shaft of a rotor at a position close to a rotor yoke and a sensor. And fix the brushless motor.
To form
【０００７】[0007]
【実施例】以下この発明をブラシレスモ−タに使用した
一実施例を図面により説明する。図１はこの発明の一実
施例におけるブラシレスモ−タの半断面図であり、図２
はこの発明に係わるプラスチックマグネットの断面図で
ある。ステ−タコア１に絶縁層２を介してコイル３を施
し、一方プリント配線板４のセンサ５を装着した面をス
テ−タコア端面に対向して保持するとともに、ステ−タ
コア１、コイル３、センサ５を装着したプリント配線板
４を電気絶縁性を有する合成樹脂６で一体的に成形固化
してステ−タを形成している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a brushless motor will be described below with reference to the drawings. FIG. 1 is a half sectional view of a brushless motor according to an embodiment of the present invention.
1 is a sectional view of a plastic magnet according to the present invention. The coil 3 is applied to the stator core 1 via the insulating layer 2, while the surface of the printed wiring board 4 on which the sensor 5 is mounted is held facing the end face of the stator core, and the stator core 1, the coil 3, and the sensor The printed wiring board 4 on which the printed circuit board 5 is mounted is integrally molded and solidified with a synthetic resin 6 having electrical insulation to form a stator.
【０００９】一方、ロ−タ７はステ−タコア１の内周に
位置し、両端を軸受８を介して、ステ−タとブラケット
９にそれぞれ回転自在に支持されている。ロ−タ７は回
転軸１０に磁性体のヨ−クが嵌着され、その外周に駆動
用マグネット１１を接着固定している。また、回転子軸
１０の一端には、ロ−タの回転位置を検出するセンサマ
グネット１２が取付部材１３を介して固定されている。
該センサマグネットと対向して、プリント配線板４に磁
気検出素子であるセンサ５を配置し、前記センサマグネ
ットとセンサ５とでロ−タ７の回転位置を検出する。On the other hand, the rotor 7 is located on the inner periphery of the stator core 1, and both ends thereof are rotatably supported by the stator and the bracket 9 via bearings 8. The rotor 7 has a yoke made of a magnetic material fitted on the rotating shaft 10 and a driving magnet 11 adhered and fixed to the outer periphery thereof. A sensor magnet 12 for detecting the rotational position of the rotor is fixed to one end of the rotor shaft 10 via a mounting member 13.
A sensor 5 which is a magnetic detecting element is disposed on the printed wiring board 4 so as to face the sensor magnet, and the rotational position of the rotor 7 is detected by the sensor magnet and the sensor 5.
【００１０】なお、本発明の駆動用マグネットとセンサ
用マグネットは図１及び図２で図示するように、段付き
の釣鐘状マグネット１４に一体成形されている。次に、
釣鐘状マグネットの固定方法について説明する。前記釣
鐘状マグネットとロ−タ７のヨ−ク及び回転軸に固定さ
れている取付部材の接合面に接着剤１５を塗付してロ−
タ７の端面が釣鐘状マグネットの段付き部１６に当接す
るまで挿入して結合させる。なお、この段付き部１６に
は溜まり溝１７を設けて接着剤の逃げ部を形成すること
により、より強固に接着結合できる。なお、この発明の
実施例ではマグネットについては、プラスチックマグネ
ットについて説明しましたが、これに限定されるもので
はなく、また、釣鐘状段付きマグネットの取付に関して
も接着に限定されるものではなく、また、ブラシレスモ
−タについて説明しましたが、これに限定されることな
く、要旨を変更しない範囲にて変更できるとともに、広
範囲に応用できることは勿論である。The driving magnet and the sensor magnet of the present invention are integrally formed on a stepped bell-shaped magnet 14 as shown in FIGS. next,
A method for fixing the bell-shaped magnet will be described. An adhesive 15 is applied to the joint surface between the bell-shaped magnet, the yoke of the rotor 7 and the mounting member fixed to the rotating shaft, and the rotor is rotated.
Until the end face of the tab 7 contacts the step 16 of the bell-shaped magnet. In addition, by providing the accumulation groove 17 in the stepped portion 16 and forming the escape portion of the adhesive, the adhesive bonding can be more firmly performed. In the embodiment of the present invention, the magnet has been described as a plastic magnet, but the present invention is not limited to this, and the mounting of the bell-shaped stepped magnet is not limited to bonding, and Although the brushless motor has been described, it is needless to say that the present invention is not limited to this, and can be changed within a range that does not change the gist, and can be widely applied.
【００１１】[0011]
【発明の効果】以上の説明から明らかなようにこの発明
は、駆動用マグネットとセンサ用マグネットを別々に形
成する必要がなく段付き釣鐘状マグネットを一体成形で
きるため次の様な効果が得られる。 １．センサの取付位置がステ−タコアの内径より内側に
配置できるため、コイルによる磁界の影響を避けること
ができる。 ２．釣鐘状の段付きマグネットのため接着等により取り
付けが容易にでき、しかも段付き部端面には溜まり溝を
設けて、接着剤の充填不足を防止できるため、より強固
に結合できる。 その結果、高信頼性を実現するブラシレスモ−タのロ−
タを提供することができる。As is apparent from the above description, according to the present invention, it is not necessary to separately form the driving magnet and the sensor magnet, and the stepped bell-shaped magnet can be integrally formed, so that the following effects can be obtained. . 1. Since the mounting position of the sensor can be disposed inside the inner diameter of the stator core, the influence of the magnetic field by the coil can be avoided. 2. The bell-shaped stepped magnet can be easily attached by bonding or the like, and furthermore, a pool groove is provided on the end face of the stepped portion to prevent insufficient filling of the adhesive, so that the connection can be made stronger. As a result, brushless motors that achieve high reliability
Can be provided.
【図１】この発明の一実施例におけるブラシレスモ−タ
の半断面図である。FIG. 1 is a half sectional view of a brushless motor according to an embodiment of the present invention.
【図２】この発明の一実施例におけるマグネットの断面
図である。FIG. 2 is a sectional view of a magnet according to one embodiment of the present invention.
【図３】従来例を示すブラシレスモ−タの半断面図であ
る。FIG. 3 is a half sectional view of a brushless motor showing a conventional example.
１ ステ−タコア ２ 絶縁層 ３ コイル ４ プリント配線板 ５ センサ ６ 合成樹脂 ７ ロ−タ ８ 軸受 ９ ブラケット １０ 回転軸 １１ 駆動用マグネット １２ センサ用マグネット １３ 取付部材 １４ 釣鐘状マグネット １５ 接着剤 １６ 段付き部 １７ 溜まり溝 REFERENCE SIGNS LIST 1 stator core 2 insulating layer 3 coil 4 printed wiring board 5 sensor 6 synthetic resin 7 rotor 8 bearing 9 bracket 10 rotating shaft 11 driving magnet 12 sensor magnet 13 mounting member 14 bell-shaped magnet 15 adhesive 16 steps Part 17 Reservoir groove
Claims (1)
ネットを有するブラシレスモ−タにおいて、駆動用マグ
ネットとセンサ用マグネットとを段付きの釣鐘状に一体
成形したことを特徴とするブラシレスモ−タのロ−タ。1. A brushless motor having a brushless motor drive and a sensor magnet, wherein the drive magnet and the sensor magnet are integrally formed in a stepped bell shape. Rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9098276A JPH10285895A (en) | 1997-03-31 | 1997-03-31 | Rotor of brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9098276A JPH10285895A (en) | 1997-03-31 | 1997-03-31 | Rotor of brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10285895A true JPH10285895A (en) | 1998-10-23 |
Family
ID=14215426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9098276A Pending JPH10285895A (en) | 1997-03-31 | 1997-03-31 | Rotor of brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10285895A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1720235A2 (en) * | 2001-12-21 | 2006-11-08 | Johnson Electric S.A. | Brushless D.C. motor |
| CN103312063A (en) * | 2012-03-09 | 2013-09-18 | 日立空调·家用电器株式会社 | Rotor of motor, motor and washing machine |
| USRE48526E1 (en) | 2004-01-22 | 2021-04-20 | Nsk Ltd. | Magnetic encoder and bearing |
-
1997
- 1997-03-31 JP JP9098276A patent/JPH10285895A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1720235A2 (en) * | 2001-12-21 | 2006-11-08 | Johnson Electric S.A. | Brushless D.C. motor |
| JP2009033968A (en) * | 2001-12-21 | 2009-02-12 | Johnson Electric Sa | Brushless dc motor |
| USRE48526E1 (en) | 2004-01-22 | 2021-04-20 | Nsk Ltd. | Magnetic encoder and bearing |
| CN103312063A (en) * | 2012-03-09 | 2013-09-18 | 日立空调·家用电器株式会社 | Rotor of motor, motor and washing machine |
| JP2013188035A (en) * | 2012-03-09 | 2013-09-19 | Hitachi Appliances Inc | Rotor for electric motor, electric motor, and washing machine |
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