JPS634177U

JPS634177U -

Info

Publication number: JPS634177U
Application number: JP9749986U
Authority: JP
Priority date: 1986-06-25
Filing date: 1986-06-25
Publication date: 1988-01-12

Description

[Brief explanation of the drawing]

第１図は従来の単相デイスク型ブラシレスモー
タを用いたフアンモータの平面図、第２図は同フ
アンモータの縦断面図、第３図は同フアンモータ
に用いた６極の界磁マグネツトの下面図、第４図
は同フアンモータのステータ電機子の平面図、第
５図は理想的な合成トルク曲線の説明図、第６図
は本考案の単相デイスク型ブラシレスフアンモー
タ１′に用いるプラスチツクマグネツトにより界
磁マグネツト形成部及び回転軸を一体形成した回
転フアンの斜視図、第７図は第６図の回転フアン
の内面部にプラスチツクによつて一体化するロー
タヨークの斜視図、第８図は第６図の回転フアン
の内面に形成した界磁マグネツト形成部にＮ，Ｓ
の駆動用の磁極を複数個着磁して界磁マグネツト
を一体形成した回転フアンの斜視図、第９図は第
８図の回転フアンの回転軸に２個の内輪を固定し
た場合の斜視図、第１０図は本考案の一例を示す
単相デイスク型ブラシレスフアンモータの固定側
の斜視図、第１１図は単相デイスク型ブラシレス
フアンモータの縦断面図、第１２図はステータ電
機子の平面図、第１３図は他の実施例を示すステ
ータ電機子の平面図である。１，１′…単相デイスク型ブラシレスフアンモ
ータ、２…フアンモータケース、３…モータケー
ス、４，４′…フイン、５…透孔、６…軸受ホル
ダ、７…軸受、８，８′…回転軸、９，９′…回
転フアン、１０，１０′…回転フアン本体、１１
…ロータヨーク、１２，１２′…界磁マグネツト
、１３…空隙、１４，１４′…ステータ電機子、
１５…位置検知素子、１６…単相デイスク型ブラ
シレスモータ、１７，１７′，１７″…ステータ
ヨーク、１８―１，１８―２…電機子コイル、１
９…コギングトルク発生用磁性体突起、２０…プ
リント基板、２１…電気部品配設スペース、２２
…端子、２３…切欠部、２４…発生トルク曲線、
２５…通電切換点、２６…コギングトルク曲線、
２７…合成トルク曲線、２８…界磁マグネツト形
成部、２９′―１，２９′―２…玉軸受、３０…
内輪、３１…外輪、３２…鋼球、３３，３３―１
，…３３―３，３４，３４′…切欠部、３３ａ…
端部、３５，３５′…端子、３６，３７…電気部
品、３８…ステー。 Figure 1 is a plan view of a fan motor using a conventional single-phase disc type brushless motor, Figure 2 is a longitudinal cross-sectional view of the fan motor, and Figure 3 is a diagram of the 6-pole field magnet used in the fan motor. The bottom view, Figure 4 is a plan view of the stator armature of the same fan motor, Figure 5 is an explanatory diagram of an ideal composite torque curve, and Figure 6 is used in the single-phase disc type brushless fan motor 1' of the present invention. FIG. 7 is a perspective view of a rotary fan in which a field magnet forming part and a rotating shaft are integrally formed using plastic magnets; FIG. 7 is a perspective view of a rotor yoke integrated with the inner surface of the rotary fan shown in FIG. The figure shows N and S in the field magnet forming part formed on the inner surface of the rotating fan in Figure 6.
FIG. 9 is a perspective view of the rotary fan shown in FIG. 8 when two inner rings are fixed to the rotating shaft. , Fig. 10 is a perspective view of the stationary side of a single-phase disc type brushless fan motor showing an example of the present invention, Fig. 11 is a vertical sectional view of the single-phase disc type brushless fan motor, and Fig. 12 is a plan view of the stator armature. FIG. 13 is a plan view of a stator armature showing another embodiment. 1, 1'...Single-phase disc type brushless fan motor, 2...Fan motor case, 3...Motor case, 4, 4'...Fin, 5...Through hole, 6...Bearing holder, 7...Bearing, 8, 8'... Rotating shaft, 9, 9'... Rotating fan, 10, 10'... Rotating fan body, 11
...Rotor yoke, 12, 12'... Field magnet, 13... Air gap, 14, 14'... Stator armature,
15...position detection element, 16...single-phase disc type brushless motor, 17, 17', 17''...stator yoke, 18-1, 18-2...armature coil, 1
9... Magnetic material projection for cogging torque generation, 20... Printed circuit board, 21... Electrical component arrangement space, 22
...terminal, 23...notch, 24...generated torque curve,
25... Energization switching point, 26... Cogging torque curve,
27...Synthetic torque curve, 28...Field magnet forming part, 29'-1, 29'-2...Ball bearing, 30...
Inner ring, 31... Outer ring, 32... Steel ball, 33, 33-1
,...33-3,34,34'...notch, 33a...
End, 35, 35'...terminal, 36, 37...electrical component, 38...stay.

Claims

[Claims for Utility Model Registration] (1) In a fan motor having a rotating fan with fins that blow air by rotating, the rotating fan is provided with a rotor yoke at a position facing a field magnet, and a plastic magnet is provided. A plurality of N and S magnetic poles are magnetized on the surface facing the stator armature of the rotary fan through an air gap to form a field magnet, and the rotor is also integrally formed with a plastic magnet. Brushless fan motor. (2) The above-mentioned rotating fan is a brushless fan as claimed in claim (1) of the utility model registration, in which a field magnet forming portion is formed on a surface of a plastic magnet that faces the stator armature of the rotating fan via an air gap. motor. (3) The above-mentioned field magnet is formed by magnetizing a plurality of N and S magnetic poles at a rotating fan position facing a stator armature disposed at a stationary side position facing each other through an air gap. , a brushless fan motor according to claim 1 or 2 of the utility model registration claim. (4) The above-mentioned field magnet is magnetized and formed at a rotating fan position facing a stator armature which is disposed at a stationary side position facing through an axial gap. The brushless fan motor described in paragraph (3). (5) The brushless fan motor according to any one of claims (1) to (4), wherein the brushless fan motor is a single-phase brushless fan motor. (6) The brushless fan motor according to claim 5, wherein the brushless fan motor is a single-phase disc type brushless fan motor. (7) The above-mentioned single-phase disc type brushless fan motor includes a stator yoke disposed opposite to a field magnet having a plurality of N and S magnetic poles magnetized on a rotating fan with an axial gap in between; One or more air-core armature coils fixed on the stator yoke and arranged in the stator armature installation part of the fan motor, and detecting the magnetic poles of the field magnet to switch and energize the armature coils. The brushless fan motor according to any one of claims (1) to (6), which is a single-phase disc-type brushless fan motor equipped with an electric circuit. (8) In the single-phase disc-type brushless fan motor, the stator yoke is provided with a notch that allows the disc-type brushless fan motor to start automatically, as stated in claim (7) of the utility model registration. brushless fan motor. (9) The disc-type brushless fan motor is provided with a printed wiring board on the lower surface of the stator yoke, electrical components constituting an energization control circuit on the lower surface of the printed circuit board, and The brushless fan motor according to claim (8) of the utility model registration, wherein a position detection element is disposed on a surface facing the notch and at a position facing the field magnet. (10) The notch formed in the stator yoke is
A brushless fan motor according to claim 8 or 9, which is formed to have a width equal to the magnetic pole width of a field magnet. 〓(11)１１〓 The notches formed in the stator yoke are formed in two or more locations spaced apart from each other by an even number of magnetic pole widths.
The brushless fan motor described in item 0). 〓(12)１２〓 The stator yoke is arranged such that the end of the notch is located at a position from the position where the maximum starting torque is obtained to about one-half magnetic pole in the rotational direction of the field magnet. A brushless fan motor according to any one of paragraphs (8) to (11) of the utility model registration request.