JPH0516269B2 - - Google Patents

Info

Publication number
JPH0516269B2
JPH0516269B2 JP61008320A JP832086A JPH0516269B2 JP H0516269 B2 JPH0516269 B2 JP H0516269B2 JP 61008320 A JP61008320 A JP 61008320A JP 832086 A JP832086 A JP 832086A JP H0516269 B2 JPH0516269 B2 JP H0516269B2
Authority
JP
Japan
Prior art keywords
small teeth
coil
teeth
circumferential direction
brushless motor
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
Application number
JP61008320A
Other languages
Japanese (ja)
Other versions
JPS62166759A (en
Inventor
Mineyo Endo
Eiji Sakaguchi
Yosuke Kawate
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Corp
Original Assignee
Nidec Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nidec Corp filed Critical Nidec Corp
Priority to JP832086A priority Critical patent/JPS62166759A/en
Publication of JPS62166759A publication Critical patent/JPS62166759A/en
Publication of JPH0516269B2 publication Critical patent/JPH0516269B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Brushless Motors (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はブラシレスモータに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to brushless motors.

〔従来の技術と発明が解決しようとする課題〕[Problems to be solved by conventional technology and invention]

従来、ブラシレスモータにて発生する起電力波
形は、第4図に示す様な正弦波となる。ところ
が、起動トルク、トルクリツプル等を改善させる
には、このような正弦波では達成することはでき
ない。
Conventionally, the electromotive force waveform generated in a brushless motor is a sine wave as shown in FIG. However, improvements in starting torque, torque ripple, etc. cannot be achieved with such a sine wave.

そこで、本発明では、起動トルク、トルクリツ
プル等を改善することができるブラシレスモータ
を提供することを目的とする。
Therefore, an object of the present invention is to provide a brushless motor that can improve starting torque, torque ripple, and the like.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のブラシレスモータは、1つのコイルピ
ツチを形成するテイースを3本以上の小テイース
に分割すると共に、分割した3本以上の該小テイ
ースのうち周方向外側の小テイースのコイル巻数
が周方向内側の小テイースのコイル巻数より多く
なるように、夫々の小テイースにコイルを同一方
向巻きに巻設して、1つのコイルピツチを形成し
たものである。
In the brushless motor of the present invention, the teeth forming one coil pitch are divided into three or more small teeth, and the number of coil turns of the small teeth on the outer side in the circumferential direction among the three or more divided small teeth is on the inner side in the circumferential direction. A single coil pitch is formed by winding a coil around each small tooth in the same direction so that the number of coil turns is greater than that of the small teeth.

〔作用〕[Effect]

分割された3本以上の小テイースのうち周方向
内側の小テイースのコイル巻数が周方向外側の小
テイースのコイル巻数より少なく、周方向内側の
小テイースにおける発生磁界が周方向外側の小テ
イースにおける発生磁界より小さくなるため、1
つのコイルピツチを形成する3本以上の小テイー
スにより発生する起電力波形は、従来の正弦波に
比べその山部の頂点部及び谷部の底部が夫々フラ
ツト状となる。
Among the three or more divided small teeth, the number of coil turns of the small teeth on the inside in the circumferential direction is smaller than the number of coil turns on the small teeth on the outer side in the circumferential direction, and the generated magnetic field in the small teeth on the inner side in the circumferential direction is greater than that in the small teeth on the outside in the circumferential direction. Since it is smaller than the generated magnetic field, 1
The electromotive force waveform generated by three or more small teeth forming one coil pitch has a flat peak and a flat bottom, respectively, compared to a conventional sine wave.

〔実施例〕〔Example〕

以下、実施例を示す図面に基づいて本発明を詳
説する。
Hereinafter, the present invention will be explained in detail based on drawings showing examples.

第1図において、ブラシレスモータ1の簡略図
であり、4つの磁極を有するロータ2と、該ロー
タ2内に嵌入されるステータ3と、を備えてい
る。具体的には、ロータ2はその内側を中心角90
度毎にN極、S極、N極、S極と順次着磁してあ
り、さらに、ステータ3は、中心角30度毎に12個
のスロツト4…を有すると共に、該スロツト4…
にて形成されかつ上記ロータ2に近接対峙する12
本の小テイース5…を備えている。
FIG. 1 is a simplified diagram of a brushless motor 1, which includes a rotor 2 having four magnetic poles and a stator 3 fitted into the rotor 2. Specifically, the rotor 2 has a center angle of 90
Furthermore, the stator 3 has 12 slots 4 at every 30 degrees center angle, and the slots 4...
12 formed by and facing closely to the rotor 2
Equipped with 5 small chapters of the book.

そして、この小テイース5には、3相分のコイ
ル6が巻設されている。即ち、1相目は、(イ)の小
テイース5から(オ)の小テイース5まで順次巻かれ
るが、(イ)の小テイース5から(ハ)の小テイース5
と、(ト)の小テイース5から(リ)の小テイース5と
は、左巻き(ロータ2の外方から見て)であり、
(ニ)の小テイース5から(ヘ)の小テイース5と、(ヌ)
の小テイース5から(オ)の小テイース5は、右巻き
である。
Further, coils 6 for three phases are wound around this small teeth 5. That is, the first phase is wound sequentially from (a) small teeth 5 to (e) small teeth 5, but from (a) small teeth 5 to (c) small teeth 5.
And, the small teeth 5 in (g) to the small teeth 5 in (li) are left-handed (as seen from the outside of the rotor 2),
From (d) small teeth 5 to (f) small teeth 5, and (nu)
Small teeth 5 to (E) small teeth 5 are right-handed.

さらに、(ロ)(ホ)(チ)(ル)の小テイース5のコイル
巻数は2であり、他の小テイース5の巻数は4で
ある。また、2相目及び3相目は図示省略した
が、2相目は(ハ)の小テイース5から(ロ)の小テイー
ス5まで順次上記1相目と同様左巻きから巻設さ
れ、3相目は(ホ)の小テイース5から(ニ)の小テイー
ス5まで順次上記1相目及び2相目と同様な巻き
方にて巻設される。
Furthermore, the number of coil turns of the small teeth 5 of (B), (E), (C), and (L) is 2, and the number of turns of the other small teeth 5 is 4. In addition, although the illustration of the second and third phases is omitted, the second phase is wound sequentially from the small teeth 5 in (c) to the small teeth 5 in (b) from the left in the same manner as the first phase, and the three phases The stitches are wound sequentially from the small teeth 5 in (E) to the small teeth 5 in (D) in the same manner as in the above-mentioned first and second phases.

そして、ロータ2の回転位置に対応して、これ
らを順次通電することによつてモータは回転す
る。なお、ホール素子等によるロータ位置検出器
は(図示省略したが)ロータ2の近傍の固定部に
付設され、各コイル6…に順次転流され、モータ
は回転する。
The motor rotates by sequentially energizing these in accordance with the rotational position of the rotor 2. Note that a rotor position detector using a Hall element or the like (not shown) is attached to a fixed part near the rotor 2, and the current is sequentially commutated to each coil 6 to rotate the motor.

しかして、このブラシレスモータ1はコイル巻
数が2:1:2となる(イ)(ロ)(ハ)の小テイース5,
5,5、(ニ)(ホ)(ヘ)の小テイース5,5,5、(ト)(
チ)
(ヌ)の小テイース5,5,5、(ル)(チ)(ワ)の
小テイース5,5,5にて夫々コイルピツチα…
が形成される。
Therefore, in this brushless motor 1, the number of coil turns is 2:1:2 (a), (b), and (c).
5, 5, (d) (e) (f) small teeth 5, 5, 5, (g) (
blood)
Coil pitch α at small teeth 5, 5, 5 of (nu), small teeth 5, 5, 5 of (ru) (chi) (wa), respectively...
is formed.

即ち、1つのコイルピツチαを形成する3本の
小テイース5…のうち、周方向外側の小テイース
5,5のコイル巻数が周方向内側の小テイース5
のコイル巻数よりも多くなつている。また、1つ
のコイルピツチαの3本の小テイース5,5,5
は同一方向巻きとされる。
That is, among the three small teeth 5 forming one coil pitch α, the number of coil turns of the small teeth 5 on the outside in the circumferential direction is the same as that of the small teeth 5 on the inside in the circumferential direction.
The number of turns in the coil is greater than the number of turns in the coil. In addition, three small teeth 5, 5, 5 with one coil pitch α
are assumed to wind in the same direction.

従つて、このブラシレスモータ1は、コイル巻
数比を2:1:2−いわゆる「重みづけ」−とし
たことになる。
Therefore, this brushless motor 1 has a coil turns ratio of 2:1:2 - so-called "weighting".

即ち、分割された3本の小テイース5…のうち
周方向内側の小テイース5のコイル巻数が周方向
外側の小テイース5,5のコイル巻数より少な
く、周方向内側の小テイース5における発生磁界
が周方向外側の小テイース5における発生磁界よ
り小さくなるため、1つのコイルピツチを形成す
る3本以上の小テイース5…により発生する起電
力波形は、第4図に示す従来の正弦波に比べその
山部の頂点部及び谷部の底部が第3図に示すよう
にフラツト状となり、起電力トルク、トルクリツ
プル等の特性を向上させることができる。
That is, among the three divided small teeth 5..., the number of coil turns of the small teeth 5 on the inside in the circumferential direction is smaller than the number of coil turns on the small teeth 5 on the outside in the circumferential direction, and the generated magnetic field in the small teeth 5 on the inner side in the circumferential direction. is smaller than the magnetic field generated by the small teeth 5 on the outside in the circumferential direction, so the electromotive force waveform generated by three or more small teeth 5 forming one coil pitch is smaller than the conventional sine wave shown in Fig. 4. The peaks of the peaks and the bottoms of the valleys are flat as shown in FIG. 3, and characteristics such as electromotive force torque and torque ripple can be improved.

また、第2図に示すブラシレスモータ1は、第
1図に示すブラシレスモータ1と同様に、1相目
のコイル6は(イ)(ロ)(ハ)(ヌ)(ル)(オ)の小テイー

5に巻かれるが、(イ)(ハ)(ヌ)(オ)の小テイース5の
コイル巻数は6であり、(ロ)(ル)の小テイース
5,5のコイル巻数は3である。なお、2相目及
び3相目は図示省略したが、2相目は1相目と同
様の巻き方にて、(ニ)(ホ)(ヘ)(ワ)(カ)(ヨ)の小テ

ース5…に巻かれ、3相目は1相目及び2相目と
同様の巻き方にて、(ト)(チ)(リ)(タ)(レ)(ソ)の

テイース5…に巻かれている。
Also, in the brushless motor 1 shown in FIG. 2, the first phase coil 6 is (A), (B), (C), (N), (R), and (O), similar to the brushless motor 1 shown in FIG. It is wound on the small teeth 5, but the number of coil turns of the small teeth 5 in (a), (c), (nu), and (o) is 6, and the number of coil turns on the small teeth 5 and 5 in (b) and (ru) is 3. be. Although the second and third phases are omitted from the illustration, the second phase is wound in the same way as the first phase, and the small parts of (D) (E) (F) (W) (F) (Y) are The 3rd phase is wound in the same way as the 1st and 2nd phases, and it is wrapped around the small teeth 5... It's wrapped.

従つて、このブラシレスモータ1のコイル巻数
比が2:1:2となり、この第2図に示すブラシ
レスモータ1に発生する起電力波形は第1図に示
すブラシレスモータ1と同様に、第3図に示す様
な形状となる。
Therefore, the coil turns ratio of this brushless motor 1 is 2:1:2, and the electromotive force waveform generated in the brushless motor 1 shown in FIG. 2 is similar to that of the brushless motor 1 shown in FIG. The shape will be as shown in .

なお、本発明は図示の実施例に限定されず、本
発明の要旨を逸脱しない範囲で設計変更自由であ
り、例えば、3相モータに限らず、3相以上又は
3相以下とするも自由であり、また、極数につい
ても4極、8極に限らずこれ以外の極数を選ぶこ
とができると共に、結線方式についても任意に選
択できる。また、コイルピツチαを形成するため
には、3本の小テイース5に限らないのは勿論で
ある。さらに図例では、コイル巻数は簡略化され
ており、実際は多数に巻かれている。また、コイ
ル巻数比も要求性能に応じて選択することもでき
る。
Note that the present invention is not limited to the illustrated embodiment, and the design may be changed without departing from the gist of the present invention. For example, the present invention is not limited to a 3-phase motor, and the motor may have more than 3 phases or less than 3 phases. Moreover, the number of poles is not limited to 4 or 8 poles, but other numbers can be selected, and the wiring method can also be selected arbitrarily. Furthermore, it goes without saying that the number of small teeth 5 is not limited to three in order to form the coil pitch α. Furthermore, in the illustrated example, the number of turns of the coil is simplified; in reality, the coil is wound a large number of times. Further, the coil turns ratio can also be selected depending on the required performance.

〔発明の効果〕〔Effect of the invention〕

本発明は上述の如く構成されているので、次に
記載する効果を奏する。
Since the present invention is configured as described above, it produces the effects described below.

発生する起電力波形は、その山部の頂点部及び
谷部の底部が夫々フラツト状となり、起動トル
ク、トルクリツプル等の電気的特性を改善させる
ことができる。即ち、同じトルク定数で、特性向
上が可能となり、高性能のブラシレスモータを提
供することができる。
The generated electromotive force waveform has flat peaks and bottoms of valleys, which can improve electrical characteristics such as starting torque and torque ripple. That is, the characteristics can be improved with the same torque constant, and a high-performance brushless motor can be provided.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は一実施例を示す簡略平面図、第2図は
他の実施例を示す簡略平面図、第3図は起電力波
形図である。第4図は従来のブラシレスモータか
ら発生する起電力波形図である。 5……小テイース、6……コイル、α……コイ
ルピツチ。
FIG. 1 is a simplified plan view showing one embodiment, FIG. 2 is a simplified plan view showing another embodiment, and FIG. 3 is an electromotive force waveform diagram. FIG. 4 is a waveform diagram of an electromotive force generated from a conventional brushless motor. 5...Small teeth, 6...Coil, α...Coil pitch.

Claims (1)

【特許請求の範囲】[Claims] 1 1つのコイルピツチを形成するテイースを3
本以上の小テイース5…に分割すると共に、分割
した3本以上の該小テイース5…のうち周方向外
側の小テイース5,5のコイル巻数が周方向内側
の小テイース5のコイル巻数より多くなるよう
に、夫々の小テイース5…にコイル6を同一方向
巻きに巻設して、1つのコイルピツチαを形成し
たことを特徴とするブラシレスモータ。
1 Three teeth forming one coil pitch
The number of coil turns of the outer small teeth 5 in the circumferential direction is greater than the number of coil turns of the small teeth 5 on the inner side in the circumferential direction among the three or more divided small teeth 5... A brushless motor characterized in that a coil 6 is wound in the same direction around each of the small teeth 5 to form one coil pitch α.
JP832086A 1986-01-18 1986-01-18 Brushless motor Granted JPS62166759A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP832086A JPS62166759A (en) 1986-01-18 1986-01-18 Brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP832086A JPS62166759A (en) 1986-01-18 1986-01-18 Brushless motor

Publications (2)

Publication Number Publication Date
JPS62166759A JPS62166759A (en) 1987-07-23
JPH0516269B2 true JPH0516269B2 (en) 1993-03-03

Family

ID=11689869

Family Applications (1)

Application Number Title Priority Date Filing Date
JP832086A Granted JPS62166759A (en) 1986-01-18 1986-01-18 Brushless motor

Country Status (1)

Country Link
JP (1) JPS62166759A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH078123B2 (en) * 1988-08-03 1995-01-30 日本ビクター株式会社 3-phase DC motor
JPH0253267U (en) * 1988-09-30 1990-04-17
DE4425193C1 (en) * 1994-07-16 1995-11-09 Bosch Gmbh Robert Variable speed EC direct current motor
GB2297433B (en) * 1995-01-20 1999-03-10 Norcroft Dynamics Ltd Brushless DC motors
JP3482360B2 (en) * 1999-09-27 2003-12-22 株式会社ミツバ Motor rotation detection structure
DE102008051047B4 (en) * 2008-10-09 2015-07-30 Feaam Gmbh Electric machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50119910A (en) * 1974-03-11 1975-09-19
JPS5819153A (en) * 1981-07-24 1983-02-04 Hiroyuki Mori Dc brushless motor
JPS5889055A (en) * 1981-11-21 1983-05-27 Nippon Densan Kk Brushless motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50119910A (en) * 1974-03-11 1975-09-19
JPS5819153A (en) * 1981-07-24 1983-02-04 Hiroyuki Mori Dc brushless motor
JPS5889055A (en) * 1981-11-21 1983-05-27 Nippon Densan Kk Brushless motor

Also Published As

Publication number Publication date
JPS62166759A (en) 1987-07-23

Similar Documents

Publication Publication Date Title
CA1254608A (en) D. c. motor
US4843270A (en) Electrical machine with unequal pole faces
US4703211A (en) Slotless brushless DC motor
US20100277027A1 (en) Skew pattern for a permanent magnet rotor
JPH0686527A (en) Hybrid stepping motor
JPH0516269B2 (en)
JP3564252B2 (en) Armature winding
US6236133B1 (en) Three-phase brushless motor
JPH083188Y2 (en) Brushless motor
JP2739332B2 (en) 4-phase hybrid type stepping motor
WO2002082622A1 (en) Permanent magnet type synchronous motor
JPH02142350A (en) Motor provided with polyphase dc core
JPH04322152A (en) Three-phase brushless motor
JPS587829Y2 (en) Partially driven electric motor on the outer periphery
JP3515144B2 (en) Brushless motor
JPH05344696A (en) Ac generator for vehicle
JPS6026550Y2 (en) Stator of brushless motor
JPH0690538A (en) Brushless motor
JPH01120779U (en)
JP2703237B2 (en) Brushless DC motor
JPH0634566B2 (en) Brushless motor
JPH0747981Y2 (en) Brushless motor
JPH0265055U (en)
JPS5810941B2 (en) The best way to do it is to have fun.
JPH078123B2 (en) 3-phase DC motor

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term