JPS6381674U

JPS6381674U -

Info

Publication number: JPS6381674U
Application number: JP17543886U
Authority: JP
Priority date: 1986-11-14
Filing date: 1986-11-14
Publication date: 1988-05-30

Description

[Brief explanation of the drawing]

第１図は従来の４極の界磁マグネツト、４突極
、４コイルを有する有鉄心型単相ブラシレスモー
タの横断面図、第２図及び第３図は他の従来にお
ける４コイルを有する有鉄心型単相ブラシレスモ
ータの説明図、第４図は本考者が先に考案した従
来の６極の界磁マグネツト、４突極、２コイル、
位置検知素子１個を有する有鉄心型単相ブラシレ
スモータの縦断面図、第５図は第４図における界
磁マグネツトと固定子鉄芯との関係を示すために
下面から見た場合の説明図、第６図は固定子鉄芯
の斜視図、第７図はコギング発生用磁性体基板の
説明図、第８図は界磁マグネツトと電機子コイル
との展開図、第９図は本考案第１実施例の有鉄心
型単相ブラシレスモータにおける固定子鉄心の斜
視図、第１０図は同固定子鉄心とコギング発生用
磁性体基板との対応説明図、第１１図はプリント
配線基板を用いて電気部品を配設する場合の説明
図、第１２図は本考案第２実施例の固定子鉄心の
斜視図である。１……４極の界磁マグネツト、４突極、４コイ
ルを有する有鉄心型単相ブラシレスモータ、２…
…駆動コイル、３……界磁マグネツト、４……ロ
ータヨーク、５……固定子鉄芯、６……突極、７
……ホールＩＣ、８……エアギヤツプ、９……有
鉄心型単相ブラシレスモータ、１０……補助突極
、１１……無着磁極、１２……Ｎ極、１３……Ｓ
極、１４……界磁マグネツト、１５……固定子鉄
心、１６……主突極、１７……駆動コイル、１８
……有鉄心型単相ブラシレスモータ、１９……界
磁マグネツト、１９ａ……駆動用磁極、１９ｂ…
…補助磁極、２０……固定子鉄芯、２１……主突
極、２２……補助突極、２３……駆動コイル、２
４……６極の界磁マグネツト、４突極、２コイル
を有する有鉄心型単相ブラシレスモータ、２５…
…偏平固定側カツプ体、２６……固定子鉄芯、２
７……固定子鉄芯支持体、２８……コギング発生
用磁性体基板、２９……通電制御回路用電気部品
、３０……収納用空隙、３１……切欠部、３２…
…固定軸、３３……ロータ、３４，３５……軸受
、３６……連結部材、３７……６極の界磁マグネ
ツト、３８……内周面、３９……駆動用磁極、４
０……位置検知用磁極、４１……位置検知素子、
４２……Ｔ字形突極、４３……くびれ部、４４―
１，４４―２……駆動コイル、４５……周面傘部
、４６……ロータヨーク、４７……磁性体板、４
８―１，４８―２……絶縁層、４９―１，４９―
２……プリント配電パターン、５０……端部、５
１……通電制御回路、５２，５３……トランジス
タ、５４……接続点、５５，５６……トランジス
タ、５７……接続点、５８……プラス側電源端子
、５９……アース側、６０，６１……出力端子、
６２……端部、６３……有鉄心型単相ブラシレス
モータ、６４……コギング発生用磁性体基板、６
５―１，…，６５―３……切欠部、６６……端部
、６７……コギング発生用磁性体基板、６８……
ステータヨーク、６９……プリント配線基板、７
０，７１，７２……切欠部、７３……磁性体基板
、７４……有鉄心型単相ブラシレスモータ。 Fig. 1 is a cross-sectional view of a conventional iron-core single-phase brushless motor with 4-pole field magnets, 4 salient poles, and 4 coils, and Figs. 2 and 3 are other conventional brushless motors with 4 coils. An explanatory diagram of an iron core type single-phase brushless motor, Figure 4 shows the conventional 6-pole field magnet, 4 salient poles, 2 coils, which was devised earlier by the present inventor.
A longitudinal cross-sectional view of a core type single-phase brushless motor having one position sensing element, and FIG. 5 is an explanatory diagram when viewed from the bottom to show the relationship between the field magnet and the stator core in FIG. 4. , Fig. 6 is a perspective view of the stator core, Fig. 7 is an explanatory diagram of the magnetic substrate for cogging generation, Fig. 8 is a developed view of the field magnet and armature coil, and Fig. 9 is a diagram of the present invention. A perspective view of the stator core in the iron core type single-phase brushless motor of the first embodiment, FIG. 10 is an explanatory diagram of the correspondence between the stator core and the magnetic substrate for cogging generation, and FIG. FIG. 12, which is an explanatory diagram for arranging electrical components, is a perspective view of a stator core according to a second embodiment of the present invention. 1...A single-phase brushless motor with an iron core having a 4-pole field magnet, 4 salient poles, and 4 coils, 2...
... Drive coil, 3 ... Field magnet, 4 ... Rotor yoke, 5 ... Stator core, 6 ... Salient pole, 7
... Hall IC, 8 ... Air gap, 9 ... Iron core type single-phase brushless motor, 10 ... Auxiliary salient pole, 11 ... Non-magnetized pole, 12 ... N pole, 13 ... S
Pole, 14... Field magnet, 15... Stator core, 16... Main salient pole, 17... Drive coil, 18
... Iron core type single-phase brushless motor, 19 ... Field magnet, 19a ... Drive magnetic pole, 19b ...
... Auxiliary magnetic pole, 20 ... Stator core, 21 ... Main salient pole, 22 ... Auxiliary salient pole, 23 ... Drive coil, 2
4... Iron-core single-phase brushless motor with 6-pole field magnet, 4 salient poles, and 2 coils, 25...
...Flat fixed side cup body, 26...Stator iron core, 2
7... Stator core support, 28... Magnetic substrate for cogging generation, 29... Electrical component for energization control circuit, 30... Storage gap, 31... Notch, 32...
... Fixed shaft, 33 ... Rotor, 34, 35 ... Bearing, 36 ... Connection member, 37 ... 6-pole field magnet, 38 ... Inner peripheral surface, 39 ... Drive magnetic pole, 4
0...Magnetic pole for position detection, 41...Position detection element,
42... T-shaped salient pole, 43... Constriction, 44-
1, 44-2... Drive coil, 45... Circumferential umbrella portion, 46... Rotor yoke, 47... Magnetic plate, 4
8-1, 48-2...Insulating layer, 49-1, 49-
2...Printed power distribution pattern, 50...End part, 5
1... Energization control circuit, 52, 53... Transistor, 54... Connection point, 55, 56... Transistor, 57... Connection point, 58... Positive power supply terminal, 59... Earth side, 60, 61 ...output terminal,
62... End portion, 63... Iron core type single-phase brushless motor, 64... Magnetic substrate for cogging generation, 6
5-1,..., 65-3... Notch, 66... End, 67... Magnetic substrate for cogging generation, 68...
Stator yoke, 69...Printed wiring board, 7
0, 71, 72... Notch, 73... Magnetic substrate, 74... Iron core type single-phase brushless motor.

Claims

[Claims for Utility Model Registration] (1) A plurality of T-shaped salient poles are connected radially, a drive coil is wound around some of the salient poles, and an N coil is installed at a position facing the circumferential surface of the salient pole. , the driving magnetic poles of S are 2
In a core type single-phase brushless motor in which P multi-pole field magnets (P is an integer of 1 or more) are rotatably provided, the field magnet is located at a position facing the lower part of the field magnet, and where the field magnet is free to rotate. A magnetic material plate for cogging generation is provided in which two or more notches with an appropriate opening angle width that can attract the field magnet to a position where it can be activated are formed, separated from each other by the width of an even-numbered magnetic pole or approximately the width of an even-numbered magnetic pole. A single-phase brushless motor with an iron core, characterized in that one position detection element is provided at a position where a dead point is not detected during startup. (2) The brushless motor has four T-shaped salient poles with a width approximately equal to the magnetic pole width of the field magnet, which are radially connected at equal intervals, and two of the salient poles that are in the same phase position Claims for Utility Model Registration, comprising a six-pole field magnet with a driving coil wound thereon and rotatably provided with N and S driving magnetic poles at positions facing the circumferential surface of the salient poles. The iron core type single-phase brushless motor described in paragraph (1). (3) The notch provided in the above-mentioned magnetic plate for cogging generation is formed into a notch with a width of n·θ or approximately a width of n·θ, where the width of the notch is θ and the width of the magnetic pole of the field magnet is T. , T≦n・θ≦2P・T n<2P θ=T n: a natural number of 1 or more 2P: the number of magnetic poles of the field magnet Utility model registration claim 1 or 2 Iron core type single phase brushless motor. (4) The above-mentioned cogging-generating magnetic body is arranged such that one end of the notch is moved from a position where the maximum starting torque is obtained in the rotational direction of the field magnet, or from a position in phase with this position, to one-half of the field magnet. An iron core type single-phase brushless motor according to any one of claims (1) to (3) of the utility model registration claim, which is arranged so as to be located as close as the width of the magnetic poles to this side. (5) The above-mentioned cogging-generating magnetic body is arranged such that one end of the notch is located at a position where the maximum starting torque is obtained in the rotational direction of the field magnet, or from a position in phase with this position, about a quarter of the field magnet. An iron core type single-phase brushless motor according to claim (4) of the utility model registration, which is arranged so as to be located one magnetic pole width closer to the user. (6) The cogging generating magnetic material is a magnetic substrate having an insulating layer formed on a magnetic material plate and a printed power distribution pattern formed on the insulating layer, the scope of the utility model registration claims (1) to 1. The iron core type single-phase brushless motor described in any of paragraph (5). (7) The iron-core single-phase brushless motor according to claim 6, wherein the magnetic substrate is provided with an electric circuit component for an energization control circuit. (8) The above cogging generating magnetic material has a non-magnetic substrate disposed on one side, and electrical components for an energization control circuit are disposed on the substrate. The iron core type single-phase brushless motor according to any one of items 1) to (5).