JPH10239459A - Step motor - Google Patents
Step motorInfo
- Publication number
- JPH10239459A JPH10239459A JP4271797A JP4271797A JPH10239459A JP H10239459 A JPH10239459 A JP H10239459A JP 4271797 A JP4271797 A JP 4271797A JP 4271797 A JP4271797 A JP 4271797A JP H10239459 A JPH10239459 A JP H10239459A
- Authority
- JP
- Japan
- Prior art keywords
- component
- permalloy
- stator
- magnetic
- step 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 62
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000035699 permeability Effects 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 239000011651 chromium Substances 0.000 claims abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 claims abstract 2
- 229910052710 silicon Inorganic materials 0.000 claims abstract 2
- 239000010703 silicon Substances 0.000 claims abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 229910000889 permalloy Inorganic materials 0.000 abstract description 40
- 230000004907 flux Effects 0.000 abstract description 17
- 239000002994 raw material Substances 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000000137 annealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910018106 Ni—C Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
- H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
- H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K37/16—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures having horseshoe armature cores
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromechanical Clocks (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子時計や電子機
器に用いるステップモータに関し、特にその構成要素で
ある高透磁率材であるステータの材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step motor used for an electronic timepiece and electronic equipment, and more particularly to a material of a stator, which is a component having high magnetic permeability.
【０００２】[0002]
【従来の技術】図３は、従来の１体ステータ式電子用時
計ステップモータの一例である。従来のステップモータ
の主な部品構成は、ニッケル（以後、Ｎｉと呼ぶ）成分
を７８％含有した高透磁率材（以後、７８パーマロイ材
と呼ぶ）からなるステータ１０、高透磁率材からなる磁
心２１にコイルワイヤ２２を複数回巻き付けたコイルブ
ロック２０、永久磁石材からなるロータ３０等である。2. Description of the Related Art FIG. 3 shows an example of a conventional one-piece stator type electronic timepiece stepping motor. The main components of a conventional step motor include a stator 10 made of a high magnetic permeability material (hereinafter, referred to as 78 permalloy material) containing 78% of a nickel (hereinafter, referred to as Ni) component, and a magnetic core made of a high magnetic permeability material. The coil block 20 is formed by winding a coil wire 22 around the coil 21 a plurality of times, a rotor 30 made of a permanent magnet material, and the like.
【０００３】そして、ステータ１０と磁心２１の両端は
重ね合わされると共に、ねじ止め４０もしくはカシメ固
定４１等で両端を固定して磁気結合を行い、ロータ３０
を含む磁気的な閉ループを構成する。これにより、ロー
タ３０の回りの磁気抵抗分布が正しくセットされ、ロー
タ３０の静止位置が決まり、コイルブロック２０で生成
された磁束５０をロータ３０に導くことが可能となる。Then, both ends of the stator 10 and the magnetic core 21 are overlapped, and both ends are fixed with a screw 40 or a caulking fixing 41 to perform magnetic coupling.
To form a magnetic closed loop. Thereby, the magnetic resistance distribution around the rotor 30 is set correctly, the rest position of the rotor 30 is determined, and the magnetic flux 50 generated by the coil block 20 can be guided to the rotor 30.
【０００４】ところで、１体ステータ式電子用時計ステ
ップモータのステータは、図３に示す様に、ステータ１
０の外周切り欠き部１３を少なくとも１カ所以上設け、
断面積の小さい連結部１１を設けている。連結部１１
は、コイルブロック２０で生成された磁束５０が通過す
ると、磁気飽和を起こし、その後、ステータ穴１２には
均一の磁束５１が流れ、ロータ３０との磁気の反発によ
り、ロータ３０は回転を行う。[0004] By the way, as shown in FIG.
0 at least one notch 13 is provided,
A connecting portion 11 having a small sectional area is provided. Connecting part 11
When the magnetic flux 50 generated by the coil block 20 passes, magnetic saturation occurs. Thereafter, a uniform magnetic flux 51 flows through the stator hole 12, and the rotor 30 rotates due to repulsion of magnetism with the rotor 30.
【０００５】この時、連結部１１を如何に少ない磁束で
磁気的飽和させるかで、ステップモータの効率が決定す
る。そこで従来では、図１に示す様にステータ材料に７
８パーマロイ材を用いることで、飽和磁束密度（この場
合、磁界Ｈが８０００００（アンペア／ｍ）の時の磁束
密度Ｂを指す）が５６００００（アンペア／ｍ）程度ま
で低くして、連結部１１の磁気的飽和を早め、ステップ
モータの効率ＵＰを図っていた。At this time, the efficiency of the stepping motor is determined by the magnetic saturation of the connecting portion 11 with a small amount of magnetic flux. Therefore, conventionally, as shown in FIG.
By using an 8 permalloy material, the saturation magnetic flux density (in this case, the magnetic flux density B when the magnetic field H is 800,000 (ampere / m)) is reduced to about 560000 (ampere / m), The magnetic saturation has been accelerated to improve the efficiency of the step motor.
【０００６】[0006]
【課題を解決するための手段】しかし、ステータ材料に
７８パーマロイ材を使用すると、７８パーマロイには高
価なＮｉを多く含有しているため、材料自体の原料価格
が高くなり、安い価格でステップモータを市場に提供す
ることが不可能になる、という課題があった。また、Ｎ
ｉの含有量が少ないＮｉ成分４５％の高透磁率材（以
後、４５パーマロイ材と呼ぶ）を用いることで、原料価
格のコストダウンを図っていた。しかし、４５パーマロ
イ材の飽和磁束密度は、図１に示す様に、１１２０００
０（アンペア／ｍ）と高く、連結部１１を７８パーマロ
イ材と同様な磁束数で磁気飽和させるには、断面形状を
１／２程度にする必要があった。断面形状を１／２にす
ると連結部が外力に対して変形しやすくなり、図３のス
テータ穴１２の穴形状が穴ビツ形状となる。その結果、
ロータ３０の回りの磁気抵抗分布が乱れてロータ３０の
静止位置が変化して、モータ効率を低下させる原因とな
る、という課題があった。However, when 78 permalloy is used as the stator material, 78 permalloy contains a large amount of expensive Ni, so that the raw material price of the material itself becomes high, and the stepper motor is inexpensive. There is a problem that it is impossible to provide the market with Also, N
By using a high magnetic permeability material of 45% Ni component having a small i content (hereinafter referred to as 45 permalloy material), the cost of raw materials was reduced. However, the saturation magnetic flux density of the 45 permalloy material is, as shown in FIG.
In order to magnetically saturate the connecting portion 11 with a magnetic flux number similar to that of a 78 permalloy material, the cross-sectional shape had to be reduced to about 1/2. When the cross-sectional shape is reduced to half, the connecting portion is easily deformed by an external force, and the hole shape of the stator hole 12 in FIG. 3 becomes a hole bit shape. as a result,
There has been a problem that the magnetic resistance distribution around the rotor 30 is disturbed and the rest position of the rotor 30 changes, which causes a reduction in motor efficiency.
【０００７】そこで、この発明の目的は、従来の課題を
解決するため、高価なＮｉの含有量が少なく、従来のス
テータ材料と同等な飽和磁束密度が得られる高透磁率材
をステータ材料に用いて、従来と同様な部品の機械的強
度を保ち、部品のコストダウンを図ったことである。Accordingly, an object of the present invention is to solve the conventional problems by using a high magnetic permeability material having a low content of expensive Ni and capable of obtaining a saturation magnetic flux density equivalent to that of a conventional stator material. Thus, the mechanical strength of the parts is maintained as in the prior art, and the cost of the parts is reduced.
【０００８】[0008]
【発明の実施の形態】上記課題を解決するために、この
発明は、永久磁石材よりロータ、前記ロータを取り囲む
ように配設されたステータ及び高透磁率材よりなる磁心
を有するコイルブロックを主な構成要素とするステップ
モータにおいて、前記ステータの材料としてニッケル成
分が３７．５％〜３８．５％、クロム（以後、Ｃｒと呼
ぶ）成分が７．５〜８．５％、シリコン（以後、Ｓｉと
呼ぶ）成分とマンガン（以後、Ｍｎと呼ぶ）成分の合計
が０．１％〜１％、残りの成分の鉄（以後、Ｆｅと呼
ぶ）が５２．５％〜５４．５％、含まれているＮｉ−Ｃ
ｒ系高透磁率材（以後、３８パーマロイ材と呼ぶ）を使
用した。３８パーマロイ材はＣｒ成分を添加すること
で、図１に示す様に、８０００００（アンペア／ｍ）の
磁界中で磁束密度が７８パーマロイ材と同等な５６００
００（アンペア／ｍ）程度となり、磁気飽和状態とな
る。その結果、７８パーマロイ材と同条件の磁束量で図
３の連結部１１を磁気飽和できるため、磁路の断面積を
小さくする必要がなくなり、部品の機械的強度を損なう
こともない。DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the above problems, the present invention mainly comprises a rotor made of a permanent magnet material, a stator disposed to surround the rotor, and a coil block having a magnetic core made of a high magnetic permeability material. In the stepping motor, the components of the stator are as follows: a nickel component is 37.5% to 38.5%; a chromium (hereinafter referred to as Cr) component is 7.5 to 8.5%; A total of 0.1% to 1% of a component of manganese (hereinafter referred to as Mn) component and 52.5% to 54.5% of iron (hereinafter referred to as Fe) of the remaining component is contained. Ni-C
An r-based high permeability material (hereinafter referred to as 38 permalloy material) was used. As shown in FIG. 1, the 38 permalloy material has a magnetic flux density of 5600 equivalent to that of a 78 permalloy material in a magnetic field of 800000 (amps / m) by adding a Cr component.
It becomes about 00 (ampere / m), and it is in a magnetically saturated state. As a result, the connecting portion 11 of FIG. 3 can be magnetically saturated with the same amount of magnetic flux as that of the 78 permalloy material, so that it is not necessary to reduce the sectional area of the magnetic path, and the mechanical strength of the component is not impaired.
【０００９】図２は、図３に示した１体ステータ式電子
用時計ステップモータのコイルに流れる電流波形を示し
ており、実線ａは３８パーセント材のステータ、一点鎖
線ｂは７８パーマロイ材のステータ、点線ｃはＮｉを４
５パーセント含有したステータ材料（以後、４５パーマ
ロイ材と呼ぶ）を用いたステップモータの電流波形であ
る。FIG. 2 shows a waveform of a current flowing through a coil of the one-piece stator type electronic timepiece motor shown in FIG. 3, wherein a solid line a represents a 38% stator and a dashed line b represents a 78 permalloy stator. , Dotted line c indicates Ni 4
5 is a current waveform of a step motor using a stator material containing 5% (hereinafter, referred to as 45 permalloy material).
【００１０】電流波形の立ち上がり時間（図２のｔ１，
ｔ２，ｔ３）について見ると、３８パーセント材の立ち
上がり時間ｔ１は、７８パーマロイ材の立ち上がり時間
ｔ２とほぼ同等な時間（ｔ１＝ｔ２）であるが、４５パ
ーマロイ材の立ち上がり時間ｔ３は極端に長くなる。
（ｔ１＜ｔ３）。１体ステータにおける電流波形の立ち
上がりは、ステータの連結部１１，１２を通るコイルブ
ロック２０からの磁束の磁気飽和を表す。従って、飽和
磁束密度が高い４５パーマロイ材を用いた場合、連結部
１１を飽和させるために多くの磁束をコイルブロック２
０で生成する必要があり、その分電流消費の多くなり、
結果的にステップモータの効率（少ない電流でロータを
回転出来るほど効率がよい）が低くなることが分かる。The rise time of the current waveform (t1, t1 in FIG. 2)
Looking at t2 and t3), the rise time t1 of the 38 percent material is substantially the same as the rise time t2 of the 78 permalloy material (t1 = t2), but the rise time t3 of the 45 permalloy material is extremely long. .
(T1 <t3). The rise of the current waveform in the one-piece stator indicates the magnetic saturation of the magnetic flux from the coil block 20 passing through the connecting portions 11 and 12 of the stator. Therefore, when a 45 permalloy material having a high saturation magnetic flux density is used, a large amount of magnetic flux is used to saturate the connecting portion 11.
It is necessary to generate at 0, the current consumption increases by that much,
As a result, it can be seen that the efficiency of the step motor (the higher the efficiency with which the rotor can be rotated with a smaller current) is lower.
【００１１】一方、３８パーマロイ材を用いた場合は、
７８パーマロイ材と用いた場合と同等な電流波形の立ち
上がり時間であるため、連結部１１を飽和させるための
電流消費が少なくて済むため、ステップモータの効率が
高くなる。次に、上記３８パーマロイ材と７８パーマロ
イ材を用いた場合のステップモータのモータ効率につい
て、図４を用いて説明する。On the other hand, when 38 permalloy is used,
Since the rise time of the current waveform is equivalent to that in the case of using the 78 permalloy material, the current consumption for saturating the connecting portion 11 can be reduced, and the efficiency of the stepping motor increases. Next, the motor efficiency of the step motor in the case of using the 38 permalloy material and the 78 permalloy material will be described with reference to FIG.
【００１２】ステップモータの効率ηは、入力エネルギ
ー（コイルに印加する電力）と出力エネルギー（今回は
分針トルクとした）の比率で表せる。すなわち、 効率η＝出力エネルギー／入力エネルギー ＝｛（分針トルク）＊（移動量）｝／｛（印加電圧）＊
（消費電流）｝ となり、図４に示す様に、３８パーマロイ材と７８パー
マロイ材を用いた場合のステップモータのモータ効率は
ほぼ同等であることが分かる。The efficiency η of the step motor can be expressed by the ratio between the input energy (power applied to the coil) and the output energy (this time is the minute hand torque). That is, efficiency η = output energy / input energy = ｛(minute hand torque) * (movement amount)｝ / ｛(applied voltage) *
(Current consumption)｝, as shown in FIG. 4, it can be seen that the motor efficiency of the stepper motor when the 38 permalloy material and the 78 permalloy material are used is almost the same.
【００１３】更に、材料成分中にボロン成分（以後Ｂ成
分と呼ぶ）が含有していない３８パーマロイをステータ
材料に使用すること、について説明する。一般的にステ
ータの形状は複雑であり、更に量産性を考慮してプレス
抜き加工で成形する。そのため、３８パーマロイ材料に
微量のＢ成分を含有させて、プレス抜き性をプレスの加
工性を高めている。しかし、Ｂ成分は磁性材の磁気特性
を低下させるため、磁性焼鈍で除去する必要がある。そ
こで、ステータ材料の中のＢ成分を完全に除去するに
は、７８パーマロイ材を使用した場合よりも長い時間の
磁性焼鈍もしくは複数回の磁性焼鈍をする必要があり、
大量生産時の生産性が低下する。Further, the use of 38 permalloy, which does not contain a boron component (hereinafter referred to as B component) in the material component, as the stator material will be described. Generally, the shape of the stator is complicated, and it is formed by press punching in consideration of mass productivity. For this reason, a small amount of the B component is added to the 38 permalloy material to enhance the press punching property and the press workability. However, the B component deteriorates the magnetic properties of the magnetic material and must be removed by magnetic annealing. Therefore, in order to completely remove the B component in the stator material, it is necessary to perform magnetic annealing for a longer time or a plurality of times of magnetic annealing than in the case of using a 78 permalloy material,
Productivity during mass production decreases.
【００１４】そこで、Ｂ成分を含有しない３８パーマロ
イ材をステータ材料に使用した本発明における実施例２
のステータは、７８パーマロイ材と同じ一回の磁性焼鈍
工程で必要な磁気特性が得られるのである。Therefore, a second embodiment of the present invention in which 38 permalloy containing no B component is used as a stator material
The required magnetic characteristics can be obtained by the same one-time magnetic annealing step as that of the 78 permalloy material.
【００１５】[0015]
【発明の効果】本発明は、以上説明したように１体ステ
ータ式電子用時計ステップモータのステータの材料に３
８パーマロイ材を使用することで、原料のＮｉ含有量を
減らして、原料費のコストダウンを実現した所に効果が
ある。また、ステータ材料の飽和磁束密度を従来と同等
なレベルの５６００００（アンペア／ｍ）程度に維持し
たことで、ステータの連結部の断面形状を従来と同様に
することができ、外乱に対する部品の機械的強度を従来
と同等なレベルに保つことが可能となった。According to the present invention, as described above, the material of the stator of the one-piece stator type electronic timepiece stepper motor is three times.
The use of 8-permalloy is effective in reducing the Ni content of the raw material and reducing the raw material cost. In addition, by maintaining the saturation magnetic flux density of the stator material at about 560000 (Amps / m), which is the same level as the conventional one, the cross-sectional shape of the connecting portion of the stator can be made the same as the conventional one, and the machine The target strength can be maintained at the same level as before.
【００１６】さらに、７８パーマロイ材と３８パーマロ
イ材のステータ形状を同一形状にできるため、アフター
サービス上での材料違いのステータによる部品交換が可
能となった。更に、Ｂ成分を含有しない３８パーマロイ
材をステータ材料に使用することで、必要な磁気特性が
得られるための磁性焼鈍工程を最小回数に押さえること
が出来、従来材料の７８パーマロイ材と同等な大量生産
性を得ることが可能となる。Furthermore, since the stator shapes of the 78 permalloy material and the 38 permalloy material can be made the same, it is possible to replace parts by a stator having a different material in after-sales service. Furthermore, by using a 38 permalloy material containing no B component for the stator material, the number of magnetic annealing steps required to obtain the required magnetic properties can be reduced to a minimum, and a large amount equivalent to the conventional material of 78 permalloy material can be obtained. Productivity can be obtained.
【図１】本発明のステータ材料に用いる３８パーマロイ
及び従来のステータ材料である４５パーマロイ及び７８
パーマロイの磁気的特性を示したグラフである。FIG. 1 shows 38 permalloy used for the stator material of the present invention and 45 permalloy and 78 which are conventional stator materials.
5 is a graph showing magnetic properties of Permalloy.
【図２】１体ステータ式電子用時計ステップモータのコ
イルに流れる電流波形を示す図である。FIG. 2 is a diagram showing a waveform of a current flowing through a coil of a one-piece stator type electronic timepiece stepping motor.
【図３】従来からある１体ステータ式電子用時計ステッ
プモータの簡略化した構成図である。FIG. 3 is a simplified configuration diagram of a conventional one-piece stator electronic timepiece stepping motor.
【図４】３８パーマロイ材と７８パーマロイ材を用いた
場合のステップモータのモータ効率を示す。FIG. 4 shows the motor efficiency of a step motor when 38 permalloy and 78 permalloy are used.
１０ ステータ １１ 連結部 １２ ステータ穴 １３ 外周切り欠き部 ２０ コイルブロック ２１ 磁心 ２２ コイルワイヤ ３０ ロータ ４０ ねじ止め ４１ カシメ固定 ５０，５１ 磁束 DESCRIPTION OF SYMBOLS 10 Stator 11 Connecting part 12 Stator hole 13 Outer peripheral cutout part 20 Coil block 21 Magnetic core 22 Coil wire 30 Rotor 40 Screwing 41 Fixed by caulking 50, 51 Magnetic flux
Claims (2)
を取り囲むように配設されたステータ及び高透磁率材よ
りなる磁心を有するコイルブロックを主な構成要素とす
るステップモータにおいて、前記ステータの材料として
ニッケル成分が３７．５％〜３８．５％、クロム成分が
７．５〜８．５％、鉄成分が５２．５％〜５４．５％、
シリコン成分とマンガン成分の合計が０．１％〜１％含
まれているＮｉ−Ｃｒ系高透磁率材を使用した事を特徴
とするステップモータ。1. A step motor mainly comprising a rotor made of a permanent magnet material, a stator disposed so as to surround the rotor, and a coil block having a magnetic core made of a high magnetic permeability material. 37.5% to 38.5% of a nickel component, 7.5 to 8.5% of a chromium component, 52.5% to 54.5% of an iron component,
A step motor using a Ni-Cr-based high magnetic permeability material containing 0.1% to 1% of a total of a silicon component and a manganese component.
の中に、ボロン成分が含有していない事を特徴とする請
求項１記載のステップモータ。2. The step motor according to claim 1, wherein a boron component is not contained in the stator material component that is a high magnetic permeability material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4271797A JPH10239459A (en) | 1997-02-26 | 1997-02-26 | Step motor |
| PCT/JP1997/004783 WO1998038725A1 (en) | 1997-02-26 | 1997-12-22 | Stepper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4271797A JPH10239459A (en) | 1997-02-26 | 1997-02-26 | Step motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10239459A true JPH10239459A (en) | 1998-09-11 |
Family
ID=12643832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4271797A Pending JPH10239459A (en) | 1997-02-26 | 1997-02-26 | Step motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH10239459A (en) |
| WO (1) | WO1998038725A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017079582A (en) * | 2015-10-20 | 2017-04-27 | セイコーインスツル株式会社 | Stepping motor, watch movement, watch, stepping motor manufacturing method |
| JP2019216606A (en) * | 2015-01-20 | 2019-12-19 | セイコーインスツル株式会社 | Method for manufacturing stepping motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2760013B2 (en) * | 1989-02-27 | 1998-05-28 | 大同特殊鋼株式会社 | Method for producing high permeability magnetic material |
| JPH0347946A (en) * | 1989-07-17 | 1991-02-28 | Nkk Corp | Manufacture of boron-containing austenitic stainless steel having excellent hot workability as well as cold ductility and toughness |
| JPH0499806A (en) * | 1990-08-13 | 1992-03-31 | Nkk Corp | Manufacture of boron-containing austenitic stainless steel having excellent corrosion resistance and workability with austenitic stainless steel clad on steel plate surface |
| JPH04358045A (en) * | 1991-06-04 | 1992-12-11 | Nisshin Steel Co Ltd | Ni-cr-fe soft magnetic alloy |
| JPH06169537A (en) * | 1992-11-27 | 1994-06-14 | Citizen Watch Co Ltd | Electronic clock motor stator |
| JPH07252604A (en) * | 1994-03-10 | 1995-10-03 | Nippon Steel Corp | Fe-Ni alloy with excellent etching and press formability |
-
1997
- 1997-02-26 JP JP4271797A patent/JPH10239459A/en active Pending
- 1997-12-22 WO PCT/JP1997/004783 patent/WO1998038725A1/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019216606A (en) * | 2015-01-20 | 2019-12-19 | セイコーインスツル株式会社 | Method for manufacturing stepping motor |
| JP2017079582A (en) * | 2015-10-20 | 2017-04-27 | セイコーインスツル株式会社 | Stepping motor, watch movement, watch, stepping motor manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1998038725A1 (en) | 1998-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH10111366A (en) | Stepping motor for clock having stator of soft magnetic alloy, and the soft magnetic alloy | |
| US5926083A (en) | Static magnet dynamo for generating electromotive force based on changing flux density of an open magnetic path | |
| US5648692A (en) | Stator yoke and method of producing same | |
| CN106253518A (en) | The manufacture method of rotor, motor and rotor | |
| JPH10239459A (en) | Step motor | |
| JPH0158748B2 (en) | ||
| JP2016144336A (en) | Stepping motor and clock | |
| JP2011050246A (en) | Permanent magnet type motor | |
| JPH0789730B2 (en) | Permanent magnet type DC machine with auxiliary pole | |
| US3673446A (en) | Induction disc type relay | |
| JPH08140327A (en) | Stepping motor for electric clock | |
| JP2002354716A (en) | AC servo motor | |
| KR100252831B1 (en) | Method for magnetization of permanent magnet | |
| JP4272075B2 (en) | Stepping motor | |
| JPH06169537A (en) | Electronic clock motor stator | |
| Seo et al. | Analysis and design of spoke-type ferrite permanent magnet motor with rotor overhang | |
| JP3654087B2 (en) | Electronically controlled mechanical clock | |
| JPS59159655A (en) | Method of operating electric machine and electric machine | |
| JPH0391210A (en) | Transformer | |
| JP2026071266A (en) | A magnetic circuit with multiple magnet types. | |
| JPH05260712A (en) | Permanent magnet synchronous motor | |
| JPS61179504A (en) | Alnico permanent magnet | |
| JPS6329811B2 (en) | ||
| JP2002320372A (en) | Stepping motor | |
| JPS60178610A (en) | Choke coil |