JPH0621378U - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JPH0621378U JPH0621378U JP5668192U JP5668192U JPH0621378U JP H0621378 U JPH0621378 U JP H0621378U JP 5668192 U JP5668192 U JP 5668192U JP 5668192 U JP5668192 U JP 5668192U JP H0621378 U JPH0621378 U JP H0621378U
- Authority
- JP
- Japan
- Prior art keywords
- brushless motor
- yoke
- drive magnet
- resonance
- resin plate
- 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)
- Motor Or Generator Frames (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
(57)【要約】
【目的】 音響・映像用モータに使用される回転ヨーク
を持つブラシレスモータの回転ヨークの共振音を低減す
る。
【構成】 回転ヨーク５が金属板５a，５bに樹脂板５c
を挾み込んだ３層構造とすることで、回転ヨークの共振
を吸収する。
(57) [Abstract] [Purpose] To reduce the resonance noise of the rotating yoke of a brushless motor that has a rotating yoke used for audio / visual motors. [Structure] The rotating yoke 5 includes a resin plate 5c on the metal plates 5a and 5b.
The resonance of the rotary yoke is absorbed by adopting a three-layer structure in which
Description
【０００１】[0001]
本考案は、音響・映像分野に使用されるブラシレスモータに関するものである 。 The present invention relates to a brushless motor used in the audio / visual fields.
【０００２】[0002]
近年、音響・映像用のブラシレスモータは薄型化，軽量化および低騒音化が要 求されており、薄型化，軽量化に有利なセンサレス駆動方式を使用する例も増え ている。 In recent years, brushless motors for audio and video have been required to be thinner, lighter, and less noisy, and an increasing number of examples are using a sensorless drive system that is advantageous for thinning and lightening.
【０００３】 以下に従来のブラシレスモータについて説明する。図２は従来のブラシレスモ ータの半断面図であり、１はフラットコイル、２はロータヨーク、３は駆動マグ ネット、４はフレキシブルプリント基板、５は回転ヨークである。A conventional brushless motor will be described below. FIG. 2 is a half sectional view of a conventional brushless motor, in which 1 is a flat coil, 2 is a rotor yoke, 3 is a drive magnet, 4 is a flexible printed circuit board, and 5 is a rotary yoke.
【０００４】 以上のように構成されるブラシレスモータについて、以下その動作を図を用い て説明する。まず、ステータ部を構成するフラットコイル１は、複数個のコイル パターンを絶縁基板上に銅によるメッキもしくはエッチングによって形成され、 駆動マグネット３と回転ヨーク５との間を所定の空隙を保って保持されている。 磁性材料から成るロータヨーク２には、円周方向にＮ極・Ｓ極交互に着磁した駆 動マグネット３が保持され、それに対向し、駆動マグネット３の磁気回路を構成 する回転ヨーク５は、磁性金属板から成る構造を有している。フラットコイル１ は駆動マグネット３の誘起電圧により駆動マグネット３の位置検出を行う働きも 持っており、フラットコイル１の誘起電圧によりセンサレス駆動回路(図示せず) がフラットコイル１を駆動することによってロータが回転する。The operation of the brushless motor configured as described above will be described below with reference to the drawings. First, the flat coil 1 constituting the stator portion is formed by forming a plurality of coil patterns on an insulating substrate by plating or etching with copper, and holding a predetermined gap between the drive magnet 3 and the rotary yoke 5. ing. A rotor yoke 2 made of a magnetic material holds a drive magnet 3 magnetized in an alternating N-pole / S-pole direction in the circumferential direction. The rotary yoke 5 facing the drive magnet 3 and constituting the magnetic circuit of the drive magnet 3 is magnetic. It has a structure made of a metal plate. The flat coil 1 also has a function of detecting the position of the drive magnet 3 by the induced voltage of the drive magnet 3, and the sensorless drive circuit (not shown) drives the flat coil 1 by the induced voltage of the flat coil 1 to cause the rotor to rotate. Rotates.
【０００５】[0005]
しかしながら、上記従来の構成では電磁音、特に回転ヨーク５の共振音が現れ るという問題点を有していた。特に電気的な騒音対策を施すことの難しいセンサ レス駆動方式を使用するとき、この問題は深刻であった。 However, the above-mentioned conventional configuration has a problem that electromagnetic noise, particularly resonance noise of the rotary yoke 5, appears. This problem was particularly serious when using the sensorless drive system, which is difficult to take electrical noise measures.
【０００６】[0006]
本考案のブラシレスモータは、回転ヨークが単一構成の金属板ではなく、樹脂 板を挾み込んだ２枚の金属板から成る構成を有している。 In the brushless motor of the present invention, the rotating yoke is not a metal plate having a single structure, but is composed of two metal plates sandwiching a resin plate.
【０００７】[0007]
本考案によれば、回転ヨークが金属板に挾み込んだ樹脂板のダンパー効果で、 回転ヨークの共振音が解決できる。また、モータの薄型化，軽量化に有利である が、騒音に問題のあるセンサレス駆動方式を使用した場合でも低騒音となり、薄 型，軽量かつ低騒音のモータが実現できる。 According to the present invention, the resonance effect of the rotary yoke can be solved by the damper effect of the resin plate in which the rotary yoke is sandwiched between the metal plates. In addition, although it is advantageous in making the motor thinner and lighter, it is possible to realize a thin, lightweight and low noise motor with low noise even when using a sensorless drive system, which has a problem with noise.
【０００８】[0008]
以下本考案の一実施例について、図面を参照しながら説明する。 An embodiment of the present invention will be described below with reference to the drawings.
【０００９】 図１(a)は本考案の一実施例におけるブラシレスモータの半断面図を示し、図 １(b)は図１(a)の回転ヨークの断面図を示す。本考案は図１(b)に示すように回 転ヨーク５が樹脂板５cを挾んで、金属板５a，５bが接着固定された３層構造で ある。なお、図２と同じ符号は同一部材を示す。FIG. 1A is a half sectional view of a brushless motor according to one embodiment of the present invention, and FIG. 1B is a sectional view of the rotary yoke of FIG. 1A. As shown in FIG. 1 (b), the present invention has a three-layer structure in which the rotating yoke 5 sandwiches the resin plate 5c, and the metal plates 5a and 5b are adhesively fixed. The same reference numerals as those in FIG. 2 indicate the same members.
【００１０】 以上のように構成されたブラシレスモータは従来と同じ回転原理で動作するが 、回転ヨーク５が金属板５a・樹脂板５c・金属板５bの３層構造になっているた め、樹脂板のダンパー効果で共振のＱ(共振の鋭さ)が下がり、共振点で発生する 音の大きさが減少する。The brushless motor configured as described above operates on the same rotation principle as the conventional one, but since the rotating yoke 5 has a three-layer structure of the metal plate 5a, the resin plate 5c, and the metal plate 5b, it is made of resin. The damper effect of the plate lowers the Q of resonance (sharpness of resonance) and reduces the volume of sound generated at the resonance point.
【００１１】[0011]
以上説明したように、本考案のブラシレスモータは、その構成品である回転ヨ ークが樹脂板を挾み込んだ２枚の金属板から成る構成であることによるダンパー 効果で、回転ヨークの共振音が解決でき、センサレス駆動方式を使用して薄型， 軽量かつ低騒音のモータが実現できる。 As described above, in the brushless motor of the present invention, the rotating yoke, which is a component of the brushless motor, is composed of two metal plates sandwiching a resin plate, and the resonance effect of the rotating yoke is caused by the damper effect. The noise can be solved, and a thin, lightweight and low noise motor can be realized by using the sensorless drive system.
【図面の簡単な説明】[Brief description of drawings]
【図１】本考案の一実施例におけるブラシレスモータの
半断面図(a)および回転ヨークの断面図(b)である。FIG. 1 is a half sectional view (a) and a sectional view (b) of a rotary yoke of a brushless motor according to an embodiment of the present invention.
【図２】従来のブラシレスモータの半断面図である。FIG. 2 is a half sectional view of a conventional brushless motor.
１…フラットコイル、 ２…ロータヨーク、 ３…駆動
マグネット、 ４…フレキシブルプリント基板、 ５
a，５b…金属板、 ５c…樹脂板。1 ... Flat coil, 2 ... Rotor yoke, 3 ... Drive magnet, 4 ... Flexible printed circuit board, 5
a, 5b ... metal plate, 5c ... resin plate.
Claims (1)
グネットに対向しマグネットと一体に回転する回転ヨー
クを持つブラシレスモータにおいて、前記回転ヨークを
金属板・樹脂板・金属板の３層構造にしたことを特徴と
するブラシレスモータ。1. A brushless motor having an annular drive magnet and a rotary yoke which faces the drive magnet and rotates integrally with the magnet. The rotary yoke has a three-layer structure of a metal plate, a resin plate and a metal plate. A brushless motor characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5668192U JPH0621378U (en) | 1992-08-12 | 1992-08-12 | Brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5668192U JPH0621378U (en) | 1992-08-12 | 1992-08-12 | Brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0621378U true JPH0621378U (en) | 1994-03-18 |
Family
ID=13034176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5668192U Pending JPH0621378U (en) | 1992-08-12 | 1992-08-12 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0621378U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58207852A (en) * | 1982-05-28 | 1983-12-03 | Japan Servo Co Ltd | Flat motor |
| JPH0475455A (en) * | 1990-07-17 | 1992-03-10 | Mitsubishi Materials Corp | Plane brushless motor |
| JP3097373B2 (en) * | 1993-02-05 | 2000-10-10 | トヨタ自動車株式会社 | Vehicle suspension |
-
1992
- 1992-08-12 JP JP5668192U patent/JPH0621378U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58207852A (en) * | 1982-05-28 | 1983-12-03 | Japan Servo Co Ltd | Flat motor |
| JPH0475455A (en) * | 1990-07-17 | 1992-03-10 | Mitsubishi Materials Corp | Plane brushless motor |
| JP3097373B2 (en) * | 1993-02-05 | 2000-10-10 | トヨタ自動車株式会社 | Vehicle suspension |
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