JPS60121955A - Dc brushless motor - Google Patents
Dc brushless motorInfo
- Publication number
- JPS60121955A JPS60121955A JP22910583A JP22910583A JPS60121955A JP S60121955 A JPS60121955 A JP S60121955A JP 22910583 A JP22910583 A JP 22910583A JP 22910583 A JP22910583 A JP 22910583A JP S60121955 A JPS60121955 A JP S60121955A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- rotor
- magnetic
- stator
- detector
- 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
- 230000004907 flux Effects 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 16
- 230000004323 axial length Effects 0.000 claims abstract description 3
- 239000000696 magnetic material Substances 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
Abstract
Description
【発明の詳細な説明】
本発明は直流無刷子電動機、特に中空円筒形の固定子鉄
芯とその円筒内に沼って複数個の固定子巻線を配設して
成る固定子の内周面に空隙を介して対向配設した中空円
筒形永久磁石金偏えた回転子を回転自在に支承し、上記
永久磁石回転子の磁極の位置を検出する磁気検出器の出
力で駆動される通電制御装置Ｉｔヲ介して上記複数個の
固定子巻線に対する通ｔ’を制御して上記永久磁石回転
子を一定方向に回転駆動する直流無刷子電動機に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a DC brushless electric motor, and more particularly to a stator having a hollow cylindrical stator core and a plurality of stator windings disposed within the cylinder. Energization control is driven by the output of a magnetic detector that rotatably supports a rotor with hollow cylindrical permanent magnets arranged opposite to each other with an air gap between the surfaces, and detects the position of the magnetic pole of the permanent magnet rotor. This invention relates to a direct current brushless motor that controls the passage t' to the plurality of stator windings through a device It to drive the permanent magnet rotor to rotate in a fixed direction.
第１図は従来の直流無刷子電動機の断面図を示し、この
電動機においては中空円筒形の固定子鉄芯２の内側に複
数個の固定子巻線３を巻装し７て成る固定子を固定子ハ
ウジング１に装着し、このハウジングｌの両端面に軸受
５’に備えたエンドブラケット４を夫々当接し、上記固
定子の内周面に空隙を介して対向配設した中空円筒形永
久磁石８を非磁性体製の回転子ハブ７を介して回転子軸
６と一体的に固着して成る回転子をエンドブラケット４
，４に備えた軸受５，５によって回転自在に支承し、エ
ンドブラケット４に設けた磁気検出器の保持装置９に取
り付けた磁気検出器ｉｏ全−ｈ記回転子の永久磁石８の
端面に接近して配設している。FIG. 1 shows a cross-sectional view of a conventional DC brushless motor. In this motor, a stator is constructed by winding a plurality of stator windings 3 inside a hollow cylindrical stator core 2. Hollow cylindrical permanent magnets are attached to the stator housing 1, and the end brackets 4 provided in the bearings 5' are brought into contact with both end faces of the housing 1, respectively, and the hollow cylindrical permanent magnets are disposed opposite to each other on the inner circumferential surface of the stator with a gap therebetween. 8 is integrally fixed to the rotor shaft 6 via a rotor hub 7 made of a non-magnetic material.
, 4, and is attached to a magnetic detector holding device 9 provided on the end bracket 4. It is arranged as follows.
磁気検出器１０は対向した永久磁石８の端面より出る磁
束を検出し、てその出力で通電制御装置（図示せｒ）を
介して上記永久磁石の磁極に対応する固定子巻線３に対
する通電を制御し、順次複数個の固定子巻線に通電する
ことにより各巻線と対向する永久磁石との間に回転力を
発生させ永久磁石回転子を一定方向に回転駆動し電動機
として動作させる。The magnetic detector 10 detects the magnetic flux emitted from the end faces of the opposed permanent magnets 8, and uses its output to energize the stator winding 3 corresponding to the magnetic pole of the permanent magnet via an energization control device (r not shown). By controlling and sequentially energizing a plurality of stator windings, a rotational force is generated between each winding and the opposing permanent magnet, and the permanent magnet rotor is driven to rotate in a fixed direction, thereby operating as an electric motor.
このような電動機に於ては複数個の固定子巻線の通電制
御装置は通常半導体素子を利用しており従来の直流電動
機のように刷子やコミュテータを備えていないので直流
無刷子電動機と呼ばれ、回転特性が良く寿命が長い等の
特長があり、近年情報処理用の機器に多く使用されてい
る。In such motors, the energization control device for the multiple stator windings usually uses semiconductor elements, and unlike conventional DC motors, it does not have brushes or commutators, so it is called a DC brushless motor. It has features such as good rotational characteristics and long life, and has been widely used in information processing equipment in recent years.
然しなから第１図に示す従来の直流無刷子電動機に於て
は各種の問題があった。その中の１つは回転子の永久磁
石の磁束を検出する磁気検出器の設置場所の問題で、第
１図に示した従来の実施例のように磁気検出器ｌＯ全回
転子の永久磁石８の端面に接近して配設しであると、磁
気検出器工０には対向した永久磁石８の磁束の他に固定
子巻線３より発する磁束も作用し、通電制御装置に雑音
信号が加えられて通電制御が乱れ、トルクが減少する問
題がある。他の１つは回転子に備えた永久磁石が郷方性
フェライトである為に出力トルクが略同じ大きさの刷子
を備えた通常の直流電動機に比べ小さいことである。However, the conventional DC brushless motor shown in FIG. 1 has various problems. One of them is the problem of the installation location of the magnetic detector that detects the magnetic flux of the permanent magnets of the rotor.As in the conventional embodiment shown in FIG. , the magnetic flux generated from the stator winding 3 acts on the magnetic detector 0 in addition to the magnetic flux of the opposing permanent magnet 8, and a noise signal is added to the energization control device. There is a problem in that the energization control is disturbed due to this, and the torque decreases. Another reason is that since the permanent magnets provided in the rotor are made of homogeneous ferrite, the output torque is smaller than that of a normal DC motor with brushes of approximately the same size.
本発明の目的は上記のような従来技術に於ける問題点を
解決し、通電制御装置が安定に動作し、かつ出力トルク
の大きい直流無刷子電動機を得るにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems in the prior art as described above, and to obtain a direct current brushless motor in which an energization control device operates stably and has a large output torque.
本発明の直流無刷子電動機は、中空円筒形の固定子鉄芯
とその円筒内に沿って複数個の固定予巻ａを配設して成
る固定子の内周面に空隙を介して対向配設した中空円筒
形永久磁石を備えた回転子全回転自在に支承し、上記永
久磁石回転子の磁極の位置全検出する磁気検出器の出力
で駆動される通電制御架Ｒを介して上記複数個の固定子
巻線に対する通電を制御して上記永久磁石回転子を一定
方向に回転駆動する直流無刷子１に７ＱＩ＋ 磯に於て
、上記磁気検出器を上記中空円筒形永久磁石回転子の上
記円筒形固定子と対向しない内周面に対向配設したこと
を特徴とする。The DC brushless electric motor of the present invention includes a stator iron core having a hollow cylindrical shape and a plurality of fixed prewinds a disposed along the inside of the cylinder. A rotor equipped with a hollow cylindrical permanent magnet is supported for full rotation, and the plurality of rotors are connected to each other via an energization control frame R driven by the output of a magnetic detector that detects the entire position of the magnetic poles of the permanent magnet rotor. 7QI+ is applied to the direct current brushless brush 1 which controls energization to the stator winding of the hollow cylindrical permanent magnet rotor to rotate the permanent magnet rotor in a fixed direction. It is characterized by being disposed facing the inner circumferential surface that does not face the shaped stator.
以下図面によって本発明の詳細な説明する。The present invention will be explained in detail below with reference to the drawings.
第２図〜第３図は本発明直流無刷子電動機の実施例を示
す。第２図に於て第１図と同じ部分は第１図と同一符号
を付けて示し、その説Ｆ！Ａを省略する。2 and 3 show an embodiment of the DC brushless motor of the present invention. In Fig. 2, the same parts as in Fig. 1 are indicated with the same symbols as in Fig. 1, and the theory F! Omit A.
本発明に於てはその半径方向に磁束自記を行った円筒形
の異方性フェライト磁石１８の内側に磁性材料で構成し
た回転子ヨーク１７ｅ当接し、該ヨーク１７の中心に回
転子軸６を一体的に固着して回転子を形成する。又回転
子ヨーク１７は、軸方向の長さＬｔｋ永久磁石１８の長
さり、より少し短くして、永久磁石１８の端面より回転
子ヨーク１７の端面奮少し凹ませて永久磁石１８の内径
側に円環状の空間２０を設け、この空間２０内に保持装
置１９’に介して磁気検出器１０を配置し、永久磁石１
８の内周面に対向せしめる。In the present invention, a rotor yoke 17e made of a magnetic material is brought into contact with the inside of a cylindrical anisotropic ferrite magnet 18 in which magnetic flux is recorded in the radial direction, and the rotor shaft 6 is placed in the center of the yoke 17. They are fixed together to form a rotor. Also, the rotor yoke 17 is made slightly shorter than the axial length Ltk of the permanent magnet 18, and the end face of the rotor yoke 17 is slightly recessed from the end face of the permanent magnet 18 to the inner diameter side of the permanent magnet 18. An annular space 20 is provided, a magnetic detector 10 is disposed in this space 20 via a holding device 19', and a permanent magnet 1
facing the inner circumferential surface of 8.
尚第４図（、）は従来技術による等方性フェライト磁石
の場合の磁束の流れを示し、磁束は磁石内を隣接磁極に
向けて流れるので、回転子ハブ７は非磁性体で構成する
のに対し第４図（ｂ）は本発明による極異方性７工ライ
ト磁石の場合の磁束の流れを示し、磁石内の磁束は半径
方向に流れるから回転子ハブは磁性材料で構成した回転
子ヨーク１７とし、磁束は磁石から回転子ヨーク１７の
内部全通って隣接磁極に達するように流ハるようにする
。Note that FIG. 4 (,) shows the flow of magnetic flux in the case of an isotropic ferrite magnet according to the prior art. Since the magnetic flux flows inside the magnet toward the adjacent magnetic poles, it is necessary to make the rotor hub 7 from a non-magnetic material. On the other hand, Fig. 4(b) shows the flow of magnetic flux in the case of the polar anisotropic 7-magnet magnet according to the present invention, and since the magnetic flux inside the magnet flows in the radial direction, the rotor hub is a rotor made of magnetic material. A yoke 17 is used, and the magnetic flux is made to flow from the magnets through the entire interior of the rotor yoke 17 to reach the adjacent magnetic poles.
本発明直流無刷子電動機は上記のような構成であるから
固定子巻線３より発した磁束は永久磁石１８によって遮
蔽され、磁気検出器１０には達しないから、磁気検出器
１０よりは雑音電圧が発生せず通電制御装置の動作が乱
れないからトルクの減少は起らない。又永久磁石１８は
極）°４方性フエライ）１−使用しているので発生する
有効磁束が大幅に増加し、この磁束に比例して発生トル
クが増大し同一寸法の刷子を備えた直流電動機の出力に
近接するようになる大きな利益があるつSince the DC brushless motor of the present invention has the above-described configuration, the magnetic flux emitted from the stator winding 3 is shielded by the permanent magnet 18 and does not reach the magnetic detector 10, so that the noise voltage is lower than that of the magnetic detector 10. Since this does not occur and the operation of the energization control device is not disturbed, torque does not decrease. Also, since the permanent magnet 18 uses a pole) degree four-sided magnet, the effective magnetic flux generated increases significantly, and the generated torque increases in proportion to this magnetic flux. There is a large benefit to getting closer to the output of
第１図は従来の直流無刷子電動機の断面図、第２図は本
発明の直流無刷子電動機の断面図、第３図はその回転子
の断面図、第４図（ａ） 、 （ｂ）は夫々従来及び本
発明の直流無刷子電動機の回転子の磁束分布図を示す。
１・・・固定子ハウジング、２・・・固定子鉄芯、３・
・・固定子巻線、４・・・エンドブラケット、５・・・
軸受、６・・・回転子軸、７・・・回転子ノ・ブ、８・
・・永久磁石、９，１９・・・保持装置、１０・・・磁
気検出器、１７・・・回転子ヨーク、１８・・・磁石、
２０・・・空間。
＋１０
＋２凹
どＵ
＋３０
１日
＋４圓（０う
＋４０（ｂ）Fig. 1 is a sectional view of a conventional DC brushless motor, Fig. 2 is a sectional view of a DC brushless motor of the present invention, Fig. 3 is a sectional view of its rotor, and Figs. 4(a) and (b). 1A and 1B show magnetic flux distribution diagrams of rotors of conventional brushless DC motors and those of the present invention, respectively. 1... Stator housing, 2... Stator iron core, 3...
... Stator winding, 4... End bracket, 5...
Bearing, 6... Rotor shaft, 7... Rotor knob, 8...
...Permanent magnet, 9, 19... Holding device, 10... Magnetic detector, 17... Rotor yoke, 18... Magnet,
20...Space. +10 +2 concave U +30 1 day +4 circles (0 U +40 (b)
Claims (3)
複数個の固定子巻線を配設して成る固定子の内約面に空
隙を介して対向配設した中空円筒形永久磁石を備えた回
転子を回転自任に支承し、上記永久磁石回転子の磁極の
位Ｒｖｉ−検出する磁気検出器の出力で駆動される通電
制御装置を介して上記複数個の固定子巻線に対する通ｔ
’を制御して上記永久磁石回転子全一定方向に回転駆動
する直流無刷子電動機に於て、上記磁気検出器を上記中
空円筒形永久磁石回転子の上記円筒形固定子と対向しな
い内周面に対向配設したことを特徴とする直流無刷子電
動機。(1) A hollow cylindrical stator core consisting of a hollow cylindrical stator core and a plurality of stator windings arranged inside the cylinder, facing each other across the inner surface of the stator. A rotor equipped with permanent magnets is supported to rotate freely, and the plurality of stator windings are connected to each other through an energization control device driven by the output of a magnetic detector that detects the position Rvi of the magnetic poles of the permanent magnet rotor. t for
In a direct current brushless motor that controls and drives the permanent magnet rotor to rotate in a constant direction, the magnetic detector is installed on the inner circumferential surface of the hollow cylindrical permanent magnet rotor that does not face the cylindrical stator. A direct current brushless motor characterized in that the motors are arranged opposite to each other.
った極異方性のあるフェライト磁石で構成したことｔ
ＩＦ＆徴とする特許請求の範囲第１項記載の直流無刷子
電動機。(2) The cylindrical permanent magnet is composed of a ferrite magnet with polar anisotropy that records magnetic flux in the radial direction.
A direct current brushless electric motor according to claim 1, which is defined as IF&.
ヨークの軸方向の長さ全前記永久磁石の長さより短く構
成してヨークの端面を上記永久磁石の端面より軸方向に
凹ませて空間を形成せしめ、この空間内に上記永久磁石
回転子の位置を検出する磁気検出器を配設したこと全特
徴とする特許請求の範囲第１項又はｆｆ１２項記載の直
流無刷子電動機。(3) The yoke of the rotor is made entirely of magnetic material, and the axial length of the yoke is shorter than the total length of the permanent magnet, so that the end face of the yoke is recessed in the axial direction from the end face of the permanent magnet. A direct current brushless motor according to claim 1 or ff12, characterized in that a space is formed by the permanent magnet rotor, and a magnetic detector for detecting the position of the permanent magnet rotor is disposed within the space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22910583A JPS60121955A (en) | 1983-12-06 | 1983-12-06 | Dc brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22910583A JPS60121955A (en) | 1983-12-06 | 1983-12-06 | Dc brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60121955A true JPS60121955A (en) | 1985-06-29 |
Family
ID=16886815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22910583A Pending JPS60121955A (en) | 1983-12-06 | 1983-12-06 | Dc brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60121955A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2685574A1 (en) * | 1991-12-20 | 1993-06-25 | Valeo Systemes Dessuyage | ROTOR WITH PERMANENT MAGNETS HAVING AN INDICATION OF ITS INSTANTANEOUS ANGULAR POSITION AND MAGNETO-DYNAMIC MACHINE, LIKE AN ENGINE WITHOUT MANIFOLD, EQUIPPED WITH SUCH A ROTOR. |
| JPH0713892U (en) * | 1993-08-23 | 1995-03-10 | 株式会社ナカノ製作所 | Hydraulic double jack |
| WO1997018119A1 (en) * | 1995-11-16 | 1997-05-22 | Lucas Industries Public Limited Company | Improvements in electric actuators for vehicle systems |
| US5877574A (en) * | 1997-01-30 | 1999-03-02 | General Electric Company | Dynamoelectric machine |
| EP0936721A1 (en) * | 1998-02-11 | 1999-08-18 | General Electric Company | Dynamoelectric machine |
| KR100446190B1 (en) * | 1995-11-16 | 2005-02-24 | 티알더블유 루카스배리티 일렉트릭 스티어링 리미티드 | Electric actuator for vehicle system |
| WO2009083898A1 (en) | 2007-12-28 | 2009-07-09 | Somfy Sas | Electric motor for operating a shutter element or solar protection element in a building |
| JP2018093585A (en) * | 2016-11-30 | 2018-06-14 | ミネベアミツミ株式会社 | motor |
-
1983
- 1983-12-06 JP JP22910583A patent/JPS60121955A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2685574A1 (en) * | 1991-12-20 | 1993-06-25 | Valeo Systemes Dessuyage | ROTOR WITH PERMANENT MAGNETS HAVING AN INDICATION OF ITS INSTANTANEOUS ANGULAR POSITION AND MAGNETO-DYNAMIC MACHINE, LIKE AN ENGINE WITHOUT MANIFOLD, EQUIPPED WITH SUCH A ROTOR. |
| JPH0713892U (en) * | 1993-08-23 | 1995-03-10 | 株式会社ナカノ製作所 | Hydraulic double jack |
| WO1997018119A1 (en) * | 1995-11-16 | 1997-05-22 | Lucas Industries Public Limited Company | Improvements in electric actuators for vehicle systems |
| KR100446190B1 (en) * | 1995-11-16 | 2005-02-24 | 티알더블유 루카스배리티 일렉트릭 스티어링 리미티드 | Electric actuator for vehicle system |
| US5877574A (en) * | 1997-01-30 | 1999-03-02 | General Electric Company | Dynamoelectric machine |
| EP0936721A1 (en) * | 1998-02-11 | 1999-08-18 | General Electric Company | Dynamoelectric machine |
| WO2009083898A1 (en) | 2007-12-28 | 2009-07-09 | Somfy Sas | Electric motor for operating a shutter element or solar protection element in a building |
| US8461736B2 (en) | 2007-12-28 | 2013-06-11 | Somfy Sas | Electric motor for operating a shutter element or solar protection element in a building |
| JP2018093585A (en) * | 2016-11-30 | 2018-06-14 | ミネベアミツミ株式会社 | motor |
| JP2021192588A (en) * | 2016-11-30 | 2021-12-16 | ミネベアミツミ株式会社 | motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4563622A (en) | Simple brushless DC fan motor | |
| US4922406A (en) | Labyrinth seal in disk storage drive | |
| US4554491A (en) | Brushless DC motor having a laminated stator with a single stator winding | |
| US4360751A (en) | Fan with integral disc-shaped drive | |
| US5729403A (en) | Disk storage drive | |
| US4570093A (en) | Direct-current motor with two drive magnets | |
| US5288216A (en) | Fan unit for generating gas streams | |
| JPS6181160A (en) | Axial air gap type coreless motor | |
| JPS60121955A (en) | Dc brushless motor | |
| US20010013732A1 (en) | Anti-vibration electric motor having outer rotor stably supported at two ends | |
| GB2102216A (en) | Noise reducing motor fan drive | |
| JPH11252886A (en) | Dc brushless motor | |
| JPH0819204A (en) | Motor | |
| JP2601014B2 (en) | Electric motor | |
| JPH05211741A (en) | Dc brushless motor pump | |
| JPS61203853A (en) | Motor | |
| JPS61237896A (en) | Motor-driven blower | |
| JPH09140092A (en) | Built-in fan type motor | |
| JPH0540701Y2 (en) | ||
| JPS59204456A (en) | Dc motor | |
| JPH036148Y2 (en) | ||
| JPH0635654Y2 (en) | Motor | |
| JPH0591709A (en) | Brushless motor | |
| JPS62125573A (en) | Spindle motor | |
| KR910008025Y1 (en) | Brushless motor |