JPS61121407A - Magnetizing method of ring body - Google Patents

Magnetizing method of ring body

Info

Publication number
JPS61121407A
JPS61121407A JP24388384A JP24388384A JPS61121407A JP S61121407 A JPS61121407 A JP S61121407A JP 24388384 A JP24388384 A JP 24388384A JP 24388384 A JP24388384 A JP 24388384A JP S61121407 A JPS61121407 A JP S61121407A
Authority
JP
Japan
Prior art keywords
magnetizing
ring body
pair
heads
flux
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
Application number
JP24388384A
Other languages
Japanese (ja)
Inventor
Takeshi Kosuge
小菅 毅
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.)
Sanyo Electric Co Ltd
Nidec Seimitsu Corp
Original Assignee
Sanyo Electric Co Ltd
Sanyo Seimitsu Co Ltd
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 Sanyo Electric Co Ltd, Sanyo Seimitsu Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP24388384A priority Critical patent/JPS61121407A/en
Publication of JPS61121407A publication Critical patent/JPS61121407A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K15/00Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00Apparatus or processes for magnetising or demagnetising

Abstract

PURPOSE:To equalize magnetizing intensity of a ring body by giving a pair of magnetizing heads an electric signal whose direction is the same as a magnetizing flux to the ring body after providing an inner and an outer periphery of the ring body with a pair of facing magnetizing heads through said ring body in a constant distance between them. CONSTITUTION:In order that a distance L between a pair of magnetizing heads 23 and 24 may keep constant, both are fixed on a fixing table not illustrated. As this pair of magnetizing heads generates a magnetizing flux with an electric signal, the magnetizing flux from the pair of magnetizing heads switch in the same direction (a direction or its backward direction between the heads 23 and 24) in a moment. Therefore, in order that a direction of the magnetizing flux of the pair of magnetizing flux of the pair of mag-netizing heads may be switched into the same direction, one magnetizing head 23 is given a signal from an encorder 11, a waveform shaping circuit 12, a dividing circuit 18 to an amplifier circuit 19, the other magnetizing head 24 is given a sigal being inverted in an inverter 25.

Description

【発明の詳細な説明】 (イ) 産業上の利用分野 本発明はリング体の着磁方法に関し、そのリング体はブ
ラシレスモータの周波数発電用マグネットとして利用で
きるものである。
DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method of magnetizing a ring body, and the ring body can be used as a frequency power generation magnet for a brushless motor.

(ロ) 従来の技術 ブラシレスモータにあっては、速度制御用の周波数発電
器を構成するマグネットを備えている。
(b) Conventional brushless motors are equipped with a magnet that constitutes a frequency generator for speed control.

すなわち、第3図に示すように、プリント基板(1〉に
取付けられたステータコイル(2)と軸方向空隙を介し
て対抗するロータ(3)は、ロータ軸(4)を有し、こ
のロータ軸は軸受ハウジング(5)内の軸受にて回転自
在に支持されており、ロータ(3)は主磁極を構成する
ように、軸方向に着磁され、且周方向に交互異極に着磁
きれた磁石円板〈6〉と、その周囲に嵌着きれたリング
体(7〉とを有する。このリング体は径方向に着磁きれ
、且周方向に交互異極に着磁きれて周波数発電用マグネ
ットを構成する。このマグネットに対抗する検出ヘッド
(8)がプリント基板(1)に設けられて・おり、この
ヘッドにて周波数発電出力を得る。
That is, as shown in FIG. 3, a rotor (3) that opposes a stator coil (2) attached to a printed circuit board (1) through an axial gap has a rotor shaft (4), and this rotor The shaft is rotatably supported by a bearing in a bearing housing (5), and the rotor (3) is magnetized in the axial direction so as to constitute a main magnetic pole, and alternately magnetized in different polarities in the circumferential direction. It has a broken magnetic disc <6> and a ring body (7>) completely fitted around it. A power generation magnet is constituted.A detection head (8) opposing this magnet is provided on the printed circuit board (1), and frequency power generation output is obtained by this head.

一般に、回転するマグネットの着磁極数は少なく、その
着磁極中が大きく、たとえば特公昭55−20463号
公報で開示される如く、回転マグネットを固定した状態
で着磁するようになきれるが、着磁極数が多い場合には
、回転マグネットを固定した状態でM磁することは不可
能となり、次のように着磁される。
Generally, the number of magnetized poles of a rotating magnet is small and the size of the magnetized poles is large. When the number of magnetic poles is large, it becomes impossible to perform M magnetization while the rotating magnet is fixed, and magnetization is performed as follows.

すなわち、第4図に示すように、リング体く7)を取付
けた磁石円板く6)を回転装置(9)の回転軸(10)
に取付け、この回転状態をエンコーダ(11〉にて検出
し、波形整形回路(12〉にて波形整形し、その検出位
相を、水晶発振子を有する発振器(13)の出力を分周
回路〈14)で分周した出力と位相比較器(15)にて
位相比較し、その誤差位相をローパスフィルタ(16)
を介して駆動回路(17)に付与して回転軸(10〉を
一定回転数で回転させる。一方、波形整形回路(12)
の出力は分周回路〈18)及び増幅回路(19)を介し
て着磁用磁束を発生する着磁ヘッド(20〉に与えられ
て、リング体く7)を500〜1000極程度に着磁す
る6 −のように着磁したリング体く7)に対する検出へラド
(8)の出力は、第5図に示すように、ロータ(3)の
位置によって波高値の異なるエンベロープ波形となり、
その最大出力と最小出力にΔV(mV)の差を生じた。
That is, as shown in FIG.
This rotating state is detected by an encoder (11), the waveform is shaped by a waveform shaping circuit (12), and the detected phase is converted to the output of an oscillator (13) having a crystal oscillator by a frequency dividing circuit (14). ) and the phase comparator (15), and the error phase is filtered to a low-pass filter (16).
to the drive circuit (17) to rotate the rotating shaft (10) at a constant rotation speed.On the other hand, the waveform shaping circuit (12)
The output is given to the magnetizing head (20) which generates magnetic flux for magnetization via the frequency dividing circuit (18) and the amplifier circuit (19), and magnetizes the ring body (7) to about 500 to 1000 poles. The output of the detection head (8) for the magnetized ring body (7) as shown in 6- is an envelope waveform whose peak value differs depending on the position of the rotor (3), as shown in Fig. 5.
A difference of ΔV (mV) was generated between the maximum output and the minimum output.

このため検出へ/ド(8)の出力の太ききを利用して速
度制御信号を作成するときには、誤信号となる。
Therefore, when a speed control signal is created using the thick output of the detection output (8), an erroneous signal will be generated.

この原因は、磁場の強さくA)と、着磁ヘッド<20)
及びリング体(7)の離間距離<B)との関係が第6図
に示すものであるため、リング体(7)の着磁ヘッド(
20)に対する離間距離がリング体く7)の位置により
異なることによる。
This is due to the strength of the magnetic field A) and the magnetizing head <20)
Since the relationship between the separation distance of the ring body (7) and the separation distance <B) of the ring body (7) is as shown in FIG.
This is because the separation distance from the ring body 20) differs depending on the position of the ring body 7).

(ハ〉 発明が解決しようとする問題点本発明はかかる
点に鑑み発明きれたものにして、リング体の着磁強度を
より均一化せんとするものである。
(c) Problems to be Solved by the Invention The present invention has been developed in view of these points, and aims to make the magnetization strength of the ring body more uniform.

(二〉  問題点を解決するための手段かかる問題点を
解決するため、本発明は、リング体の内外周に、このリ
ング体を介して対抗する一対の着磁ヘッドをその離間距
離一定に設け、この一対の着磁ヘッドに、前記リング体
への着磁用磁束が同一方向になる電気信号を付与してな
るものである。
(2) Means for Solving the Problems In order to solve the problems, the present invention provides a pair of magnetizing heads that are provided on the inner and outer peripheries of a ring body with a constant distance between them, opposing each other through the ring body. , an electric signal is applied to the pair of magnetizing heads so that the magnetic flux for magnetizing the ring body is directed in the same direction.

(ホ)作用 離間距離一定の一対の着磁へ71間に、リング体が位置
することにより、前記離間距離内におけるリング体の位
置が異なっても、一対の着磁ヘッド間の磁束が一定であ
るため、リング体の着磁強度が一定となる。
(E) By positioning the ring body between the pair of magnetizing heads with a constant working distance 71, the magnetic flux between the pair of magnetizing heads is constant even if the position of the ring body within the said separation distance is different. Therefore, the magnetization strength of the ring body is constant.

(へ)実施例 本発明の一実施例を図面に基いて説明する。(f) Example An embodiment of the present invention will be described based on the drawings.

第1図は着磁装置の断面図である。この図面において、
回転軸(10)は第4図に示す回転装置(9)により回
転駆動きれるものであり、この回転軸には支持台(21
)が固着されている。この支持台の周縁段gl!(22
)に被M磁リング体(7)が動かないように固定されて
いる。
FIG. 1 is a sectional view of the magnetizing device. In this drawing,
The rotating shaft (10) can be rotated by a rotating device (9) shown in FIG.
) is fixed. The peripheral stage gl of this support stand! (22
) is fixed to the M magnetic ring body (7) so as not to move.

(23)(24)は一対の着磁へラドにして、その離間
距離(L)が一定になるように、図示しない固定台に取
付けられている。この一対の着磁ヘッドは電気信号によ
って着磁用の磁束を発生するものであり、その一対の着
磁ヘッドからの磁束は各瞬時において同一方向(ヘッド
〈23)から(24)の方向又はその逆方向)になるも
のである。このように一対の着磁ヘッドの磁束の方向を
同一にするため、一方の着磁ヘッド(23)には、第4
図に示すエンコーダ(11)、波形整形回路(12〉、
分周回路(18)及び増幅回路(19)を経た信号が与
えられ、他方の着磁ヘッド(24〉には、その信号をイ
ンバータ(25)にて反転した信号が付与きれる。
(23) and (24) are a pair of magnetized rads and are attached to a fixed base (not shown) so that the distance (L) between them is constant. This pair of magnetizing heads generates magnetic flux for magnetization in response to an electric signal, and the magnetic flux from the pair of magnetizing heads is directed at each instant in the same direction (from head <23) to (24) or in the same direction. (in the opposite direction). In order to make the direction of the magnetic flux of the pair of magnetizing heads the same in this way, one magnetizing head (23) has a fourth
The encoder (11), waveform shaping circuit (12) shown in the figure,
A signal passed through a frequency dividing circuit (18) and an amplifier circuit (19) is applied, and a signal obtained by inverting the signal by an inverter (25) is applied to the other magnetizing head (24>).

かくして一対の着磁ヘッド(23)(24)からの着磁
用磁束の方向が同一となり、リング体(7)は一対の着
磁ヘッド(23)(24)間で回転するため、一対の:
W磁ヘッド間におけるリング体く7)の位置が多少ずれ
るときにも、リング体(7)の着磁強度は一定となる。
In this way, the direction of the magnetizing magnetic flux from the pair of magnetizing heads (23, 24) becomes the same, and the ring body (7) rotates between the pair of magnetizing heads (23, 24), so that the pair of:
Even when the position of the ring body (7) between the W magnetic heads is slightly shifted, the magnetization strength of the ring body (7) remains constant.

従ってこのリング体(7)を第3図に示す如くロータく
3〉に取付け、検出ヘッド(8)がリング体(7〉から
の信号を検出するときには、その出力は第5図の如く各
波高値が異なるものにはならず、はぼ同一のものとなる
Therefore, when this ring body (7) is attached to the rotor 3〉 as shown in Fig. 3, and the detection head (8) detects the signal from the ring body (7〉), the output is in each wave as shown in Fig. 5. The high prices will not be different, they will be almost the same.

次に第2図は他の実施例を示す着磁装置の断面図であり
、一対の着磁ヘッド(23)(24)をフ字型鉄心(2
6)の対抗磁極部で構成したものであり、コ字型鉄心(
26)に巻装したフィル(27)には、第4図に示すエ
ンコーダ(11)、波形整形回路(12)、分周回路(
18)及び増幅回路(19)を経た電気信号が付与され
る。この実施例にあっても、第1図に示す実施例の場合
と同様にリング体く7)の着磁強度を均一にすることが
できる。
Next, FIG. 2 is a cross-sectional view of a magnetizing device showing another embodiment, in which a pair of magnetizing heads (23, 24) are connected to a folded iron core (24).
6), and has a U-shaped core (
The fill (27) wrapped around the filter (26) is equipped with an encoder (11), a waveform shaping circuit (12), a frequency dividing circuit (
18) and an electrical signal that has passed through an amplifier circuit (19). In this embodiment as well, the magnetization strength of the ring body 7) can be made uniform as in the embodiment shown in FIG.

(ト)発明の効果 本発明は、被着磁リング体の内外周に、このリング体を
介して対抗する一対の着磁ヘッドをその離間距離一定に
設けると共にこの一対の着磁ヘッドに、前記リング体へ
の着磁用磁束が同一方向になる電気信号を1寸与してな
るものであるから、前記離間距離内におけるリング体の
回転位置が多少ずれても、着磁用磁束の大きさが一定で
あるため、リング体の着磁強度を従来例に比しより一層
均−化することができる。
(G) Effects of the Invention The present invention provides a pair of magnetizing heads that are arranged at a constant distance on the inner and outer peripheries of a ring body to be magnetized and that oppose each other via the ring body, and that the pair of magnetized heads are provided with the Since the magnetic flux for magnetizing the ring body is generated by applying an electric signal for one dimension so that the magnetic flux for magnetization is in the same direction, even if the rotational position of the ring body is slightly shifted within the above-mentioned separation distance, the magnitude of the magnetic flux for magnetization will not change. Since this is constant, the magnetization strength of the ring body can be made more uniform than in the conventional example.

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

第1図及び第2図は本発明の異なる実施例を示す着磁装
置の断面図、第3図はブラシレスモーフの正面図、第4
図は従来の着磁装置の概略構成図、第5図は従来の着磁
装置によって着磁したリング体を使用したときの検出ヘ
ッドによる検出出力波形図、第6図は着磁ヘッドとリン
グ体の離間距離とM磁用磁束の関係図である。 (23)(24)・・着磁ヘッド、(7)・・リング体
1 and 2 are cross-sectional views of magnetizing devices showing different embodiments of the present invention, FIG. 3 is a front view of a brushless morph, and FIG.
The figure is a schematic configuration diagram of a conventional magnetizing device, Figure 5 is a detection output waveform diagram of a detection head when using a ring body magnetized by a conventional magnetizing device, and Figure 6 is a diagram of the magnetizing head and ring body. It is a relationship diagram of the separation distance and the magnetic flux for M magnetic fields. (23) (24)... Magnetizing head, (7)... Ring body.

Claims (1)

【特許請求の範囲】[Claims] (1)電気信号によって着磁用の磁束を発生する着磁ヘ
ッドを、回転する被着磁リング体に対抗して配置し、こ
のリング体に複数の着磁を施す方法において、 前記リング体の内外周に、このリング体を介して対抗す
る一対の着磁ヘッドをその離間距離一定に設け、 この一対の着磁ヘッドに、前記リング体への着磁用磁束
が同一方向になる電気信号を付与してなる リング体の着磁方法。
(1) A method in which a magnetizing head that generates magnetic flux for magnetization by an electric signal is arranged opposite to a rotating magnetized ring body, and a plurality of magnetizations are applied to the ring body. A pair of magnetizing heads are provided on the inner and outer peripheries of the ring body, opposing each other with a constant distance between them, and an electric signal is applied to the pair of magnetizing heads so that the magnetic flux for magnetizing the ring body is directed in the same direction. A method of magnetizing a ring body.
JP24388384A 1984-11-19 1984-11-19 Magnetizing method of ring body Pending JPS61121407A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24388384A JPS61121407A (en) 1984-11-19 1984-11-19 Magnetizing method of ring body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24388384A JPS61121407A (en) 1984-11-19 1984-11-19 Magnetizing method of ring body

Publications (1)

Publication Number Publication Date
JPS61121407A true JPS61121407A (en) 1986-06-09

Family

ID=17110400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24388384A Pending JPS61121407A (en) 1984-11-19 1984-11-19 Magnetizing method of ring body

Country Status (1)

Country Link
JP (1) JPS61121407A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62106608A (en) * 1985-11-05 1987-05-18 Tohoku Metal Ind Ltd Magnetizing method for permanent magnet
JPS62149106A (en) * 1985-12-23 1987-07-03 Yamauchi Rubber Ind Co Ltd Magnetizing apparatus
JPS6322711U (en) * 1986-07-29 1988-02-15
WO2021062650A1 (en) * 2019-09-30 2021-04-08 江西荧光磁业有限公司 Magnetizing apparatus for producing neodymium-iron-boron magnet semi-finished product

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62106608A (en) * 1985-11-05 1987-05-18 Tohoku Metal Ind Ltd Magnetizing method for permanent magnet
JPS62149106A (en) * 1985-12-23 1987-07-03 Yamauchi Rubber Ind Co Ltd Magnetizing apparatus
JPH0439209B2 (en) * 1985-12-23 1992-06-26
JPS6322711U (en) * 1986-07-29 1988-02-15
WO2021062650A1 (en) * 2019-09-30 2021-04-08 江西荧光磁业有限公司 Magnetizing apparatus for producing neodymium-iron-boron magnet semi-finished product

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