JPS5925564A - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JPS5925564A JPS5925564A JP13444182A JP13444182A JPS5925564A JP S5925564 A JPS5925564 A JP S5925564A JP 13444182 A JP13444182 A JP 13444182A JP 13444182 A JP13444182 A JP 13444182A JP S5925564 A JPS5925564 A JP S5925564A
- Authority
- JP
- Japan
- Prior art keywords
- stator
- center
- rotor
- pole teeth
- magnetic pole
- 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
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
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【発明の詳細な説明】 本発明はブラシレスモータに関する。[Detailed description of the invention] The present invention relates to brushless motors.
従来のブラシレスモータはロータとステータ磁極歯との
クリアランスを異なるようにし、ロータの停止時の磁極
中心とステータの磁極中心が異なるようにした構造が提
案されている。For conventional brushless motors, a structure has been proposed in which the clearance between the rotor and the stator magnetic pole teeth is different, and the center of the magnetic pole when the rotor is stopped is different from the center of the magnetic pole of the stator.
第1図は従来のモータの一例を示すもので、図において
1はロータ、2はステータ、3は励磁コイルを示すもの
で、ロータ磁石1の停止時はN。FIG. 1 shows an example of a conventional motor. In the figure, 1 is a rotor, 2 is a stator, and 3 is an excitation coil. When the rotor magnet 1 is stopped, the state is N.
S極の中心はロータとステータ間のクリアランスが最も
小さい寸法りを保持した点になる。励磁コイル3はロー
タ1の回転と逆の方向に少しずれて配置され、ロータと
磁極とのクリアランスはBよシ大きくCとなる。The center of the S pole is the point where the clearance between the rotor and stator is maintained at its smallest size. The excitation coil 3 is arranged slightly shifted in the direction opposite to the rotation of the rotor 1, and the clearance between the rotor and the magnetic poles is C, which is larger than B.
更に角度がずれるに従いクリアランスは大きくなり、B
の点又はCの点が一番トルクが大きく、クリアランスが
大きくなるにつれてトルクは非常に小さくなる。全体の
トルクに対して寄与している部分はクリアランスB又は
Cだけになり、その他はロータがBで停止するようにす
るために太きくクリアランスをとっているだけである。As the angle further shifts, the clearance increases, and B
The torque is the largest at the point or point C, and as the clearance increases, the torque becomes extremely small. The only part that contributes to the overall torque is the clearance B or C, and the rest are just large clearances so that the rotor stops at B.
上記の構造のブラシレスモータにおいては、ロータとス
テータとの間のクリアランスの大きい点では、トルクに
寄与しないため効率が非常に低いものとなる欠点を有し
ている。本発明は上記の欠点を改善し、効率の高いブラ
シレスモータを提供することを目的とする−ものである
。The brushless motor having the above structure has the disadvantage that the large clearance between the rotor and the stator does not contribute to torque, resulting in very low efficiency. The present invention aims to improve the above-mentioned drawbacks and provide a highly efficient brushless motor.
第2図は本発明のブラシレスモータの実施例を示すもの
で、図において11は永久磁石のN、Sを交互に配置し
た円筒形状のロータであシ、12は前記のロータの内側
に配置されたステータで、中心13よシ放射状に配設さ
れた腕14と、該腕の先端に設けられた磁極歯15とよ
シ構成され腕14の先端は磁極歯の中心よシずれた位置
において結合している。なおそれぞれの腕には励磁コイ
ル16が巻回されている。すなわちロータ磁石、11と
ステータ磁極歯15とのクリアランスが一定となυ、ス
テータ磁極歯15の中心と励磁コイル16の中心とがず
れるようになっている。これは主にロータ磁石の磁極数
とステータの磁極数が同一か又は整数倍の場合に実施さ
れる。FIG. 2 shows an embodiment of the brushless motor of the present invention. In the figure, 11 is a cylindrical rotor in which N and S permanent magnets are arranged alternately, and 12 is a rotor arranged inside the rotor. The stator is composed of an arm 14 arranged radially around the center 13 and a magnetic pole tooth 15 provided at the tip of the arm, and the tip of the arm 14 is connected at a position shifted from the center of the magnetic pole tooth. are doing. Note that an excitation coil 16 is wound around each arm. That is, the clearance between the rotor magnet 11 and the stator magnetic pole tooth 15 is constant υ, and the center of the stator magnetic pole tooth 15 and the center of the exciting coil 16 are shifted from each other. This is mainly carried out when the number of magnetic poles of the rotor magnet and the number of magnetic poles of the stator are the same or an integral multiple.
次に動作について説明する。Next, the operation will be explained.
(I)ロータが停止している時は、第3図(イ)K示す
ようにロータ11の磁極の中J9はステータの磁極歯1
5の中心とつシ合って停止する。矢印は磁束の流れを示
す。(I) When the rotor is stopped, J9 in the magnetic pole of the rotor 11 is the magnetic pole tooth 1 of the stator, as shown in FIG.
It stops when it aligns with the center of 5. Arrows indicate the flow of magnetic flux.
第3図(イ)では磁石の磁極と、ステータ磁極歯とがり
り合った状態を示す。この状態では磁石に対して回転力
は働かず磁石と磁極歯との吸引力だけになる。FIG. 3(A) shows a state in which the magnetic poles of the magnet and the stator magnetic pole teeth are interlocked. In this state, no rotational force acts on the magnet, only the attractive force between the magnet and the magnetic pole teeth.
第3図(ロ)の状態では、ロータのN極からステータの
磁極歯へ磁束が通り、一部は直接磁極歯の表面を通って
隣のS極へ向かう。この状態から磁石は磁束の流れが安
定な状態に向かおうとする。すなわち第3図(イ)の状
態か、又は(イ)の状態からN極がS極に代った状態に
なる。あるいはロータのN。In the state shown in FIG. 3(B), magnetic flux passes from the north pole of the rotor to the magnetic pole teeth of the stator, and a portion of the magnetic flux passes directly through the surface of the magnetic pole teeth to the adjacent south pole. From this state, the magnet tries to move toward a state where the flow of magnetic flux is stable. That is, the state shown in FIG. 3(A) or the state in which the N pole is replaced by the S pole from the state shown in FIG. 3(A) is reached. Or rotor N.
S極の境界がステータの磁極歯の中央にくる。ただし第
3図(ロ)の状態では、ロータのN極がステータの磁極
歯と対向している面積が大きいために、第3図(イ)の
状態にもどシやすい。The south pole boundary lies in the center of the stator's magnetic pole teeth. However, in the state shown in FIG. 3(B), the area where the N pole of the rotor faces the magnetic pole teeth of the stator is large, so it is easy to return to the state shown in FIG. 3(A).
TI)ステータ磁極歯が励磁された時、磁束は励磁コイ
ル巻線部を中心にして磁束の分布が行なわれる。TI) When the stator magnetic pole teeth are excited, the magnetic flux is distributed around the exciting coil winding.
第3図(イ)の状態の磁石の磁極中心とは多少ずれるこ
とになる。The center of the magnetic pole of the magnet in the state shown in FIG. 3(a) will be slightly shifted.
第3図(ハ)に示すように、ロータ11の磁石の磁束密
度の分布中心C,と、ステータの磁極歯15の励磁の中
心C2との差によってトルクが働き、ロータ磁石に回転
力が発生する。図中矢印Xは回転方向を示す。As shown in FIG. 3(c), torque is generated due to the difference between the distribution center C of the magnetic flux density of the rotor 11 magnets and the excitation center C2 of the stator magnetic pole teeth 15, and rotational force is generated in the rotor magnets. do. Arrow X in the figure indicates the direction of rotation.
第4図は本発明の他の実施例を示すもので、ステータ磁
4仮歯工5の中央部から、多少ずれて、磁、束の流れが
磁極歯15の中心から一方へ片寄るように突孔17を設
ける。FIG. 4 shows another embodiment of the present invention, in which the stator magnet 4 protrudes slightly from the center of the temporary teeth 5 so that the flow of magnetism and flux is biased toward one side from the center of the magnetic pole tooth 15. A hole 17 is provided.
本発明は斜上のように、永久磁石のN、Sを交互に配置
してなる回転自在の円筒形状のロータと、前記のロータ
の内部に配置され、かつ磁極歯の表面と前記のロータの
内周面との間に一定のクリアランスを有し、かつ励磁コ
イルを有するステータとを備え、励磁コイルに流される
電流によシステータに発生される磁束の分布の中心が、
ロータの磁束分布の中心とずれているように構成されて
いるため、
(イ)ステータ全周に渡ってトルク発生に寄与すること
ができ効率が高くなる。The present invention includes a rotatable cylindrical rotor in which N and S permanent magnets are arranged alternately as shown above, and a rotor that is arranged inside the rotor and that is connected to the surface of the magnetic pole teeth and the rotor. The stator has a certain clearance with the inner peripheral surface and has an excitation coil, and the center of the distribution of magnetic flux generated in the system stator by the current flowing through the excitation coil is
Since it is configured to be offset from the center of the rotor's magnetic flux distribution, (a) the entire circumference of the stator can contribute to torque generation, increasing efficiency.
(ロ)構造が簡単である。(b) The structure is simple.
(ハ)自起動が容易である。(c) Self-starting is easy.
等の効果を有する。It has the following effects.
第1図は従来のブラシレスモータ、第2図は本発明のブ
ラシレスモータを示し、第3図(イ)、(ロ)。
(ハ)は説明図、第4図は他の実施例を示す。
11・・・ロータ、12・・・ステータ、13・・・中
心、14・・腕、15・・・磁極歯、16・・・励磁コ
イル、17・・空孔
特許出願人FIG. 1 shows a conventional brushless motor, FIG. 2 shows a brushless motor according to the present invention, and FIGS. 3(A) and 3(B). (C) is an explanatory diagram, and FIG. 4 shows another embodiment. DESCRIPTION OF SYMBOLS 11... Rotor, 12... Stator, 13... Center, 14... Arm, 15... Magnetic pole tooth, 16... Excitation coil, 17... Hole patent applicant
Claims (3)
の円筒形状のロータと、前記のロータの内部に配置され
、かつ磁極歯の表面と前記のロータの内周面との間に一
定のクリアランスを有し、かつbノ磁コイルを有するス
テータとを備え、励磁コイルに流される電流によシステ
ータに発生される磁束の分布の中心が、ロータの磁束分
布の中心とずれていることを特徴とするブラシレスモー
タ。(1) A rotatable cylindrical rotor formed by alternately arranging N and S permanent magnets, and a rotor disposed inside the rotor and between the surface of the magnetic pole teeth and the inner peripheral surface of the rotor. and a stator having a certain clearance and a magnetic coil of B, and the center of the magnetic flux distribution generated in the system stator by the current flowing through the excitation coil is shifted from the center of the magnetic flux distribution of the rotor. A brushless motor characterized by:
心とがずれるように構成されている特許請求の範囲第1
項記載のブラシレスモータ。(2) Claim 1, wherein the center of the stator magnetic pole teeth and the center of the excitation coil are deviated from each other.
Brushless motor as described in section.
シ発生する磁束が、該磁極歯の中心から一方へ片寄るよ
うにステータの磁極歯の部分に空孔を設けることを特徴
とする特許請求の範囲第1項記載のブラシレスモータ。(3) A patent claim characterized in that holes are provided in the magnetic pole teeth of the stator so that when the excitation coil of the stator is excited, the magnetic flux generated is biased toward one side from the center of the magnetic pole teeth. The brushless motor according to the range 1 above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13444182A JPS5925564A (en) | 1982-07-30 | 1982-07-30 | Brushless motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13444182A JPS5925564A (en) | 1982-07-30 | 1982-07-30 | Brushless motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5925564A true JPS5925564A (en) | 1984-02-09 |
Family
ID=15128424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13444182A Pending JPS5925564A (en) | 1982-07-30 | 1982-07-30 | Brushless motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5925564A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62119730U (en) * | 1986-01-22 | 1987-07-29 | ||
JPS63174543A (en) * | 1987-01-14 | 1988-07-19 | Matsushita Electric Works Ltd | Brushless motor |
JPH01162772U (en) * | 1988-04-28 | 1989-11-13 | ||
JPH01167126U (en) * | 1988-05-02 | 1989-11-24 | ||
JPH01167125U (en) * | 1988-05-02 | 1989-11-24 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4832806B1 (en) * | 1968-07-30 | 1973-10-09 |
-
1982
- 1982-07-30 JP JP13444182A patent/JPS5925564A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4832806B1 (en) * | 1968-07-30 | 1973-10-09 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62119730U (en) * | 1986-01-22 | 1987-07-29 | ||
JPH0414977Y2 (en) * | 1986-01-22 | 1992-04-03 | ||
JPS63174543A (en) * | 1987-01-14 | 1988-07-19 | Matsushita Electric Works Ltd | Brushless motor |
JPH01162772U (en) * | 1988-04-28 | 1989-11-13 | ||
JPH01167126U (en) * | 1988-05-02 | 1989-11-24 | ||
JPH01167125U (en) * | 1988-05-02 | 1989-11-24 |
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