JP2844359B2 - Permanent magnet type stepping motor - Google Patents
Permanent magnet type stepping motorInfo
- Publication number
- JP2844359B2 JP2844359B2 JP22312589A JP22312589A JP2844359B2 JP 2844359 B2 JP2844359 B2 JP 2844359B2 JP 22312589 A JP22312589 A JP 22312589A JP 22312589 A JP22312589 A JP 22312589A JP 2844359 B2 JP2844359 B2 JP 2844359B2
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- Prior art keywords
- pole
- stator
- rotor
- magnetic
- magnetic pole
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はプリンタ、高速FAX、PPC用複写機等のOA機器
用として好適な永久磁石形（ハイブリット形）ステッピ
ングモータに関する。The present invention relates to a permanent magnet (hybrid type) stepping motor suitable for OA equipment such as a printer, a high-speed FAX, and a copier for a PPC.
［従来の技術］ 従来の永久磁石形ステッピングモータとしては、２相
形のものが主流を占めており、その構造は、第６図に示
すように構成されていた。[Prior Art] As a conventional permanent magnet type stepping motor, a two-phase type is mainly used, and the structure thereof is configured as shown in FIG.
同図において、１は固定子ハウジング、２は固定子鉄
心で、これは磁極２−１〜２−８を構成している。２−
10は各磁極の内周に形成された極歯である。３は固定子
巻線で、前記各磁極に３−１〜３−８で示すように巻か
れている。In FIG. 1, reference numeral 1 denotes a stator housing, and 2 denotes a stator core, which constitutes magnetic poles 2-1 to 2-8. 2-
Reference numeral 10 denotes pole teeth formed on the inner periphery of each magnetic pole. Reference numeral 3 denotes a stator winding wound around the magnetic poles as indicated by 3-1 to 3-8.
これら固定子鉄心２、固定子巻線３で固定子Ｓが構成
されている。The stator S is constituted by the stator core 2 and the stator winding 3.
４、４′はエンドブラケット、５、５′は軸受、６は
回転子軸、７、８は夫々回転子磁極、７−10と８−10は
夫々上記回転子磁極７、８の外周に形成された極歯、９
は永久磁石で、これら６〜９で回転子Ｒが構成される。4 and 4 'are end brackets, 5 and 5' are bearings, 6 is a rotor shaft, 7 and 8 are rotor magnetic poles respectively, and 7-10 and 8-10 are formed on the outer circumference of the rotor magnetic poles 7 and 8 respectively. Pole teeth, 9
Is a permanent magnet, and a rotor R is composed of these 6 to 9.
［発明が解決しようとする課題］ ところで、従来の２相の永久磁石形ステッピングモー
タでは次の問題点があった。[Problems to be Solved by the Invention] The conventional two-phase permanent magnet type stepping motor has the following problems.
リード線の本数は４本が限度であるのに、駆動回路に
使用するトランジスタは、最低８個は必要とする。Although the number of lead wires is limited to four, at least eight transistors are required for the drive circuit.
トリクリップルが大きいため、振動が大きい。Vibration is large due to large ripple.
低コスト用として４極のモータがあるが、高精度用と
して最低８極のモータとする必要がある。There are four-pole motors for low cost, but at least eight-pole motors for high accuracy.
微小角とするためには、回転子磁極に100以上もの多
数の極歯を形成せねばならず、工作上の問題があった。In order to make the angle small, a large number of pole teeth, as many as 100 or more, must be formed on the rotor magnetic pole, which poses a problem in machining.
このため、５相の永久磁石形ステッピングモータも登
場しているが、これは次の問題点があった。For this reason, a five-phase permanent magnet type stepping motor has also appeared, but this has the following problems.
リード線は５本が限度であるのに、駆動回路に要する
トランジスタは、最低10個必要である。Although the number of lead wires is limited to 5, the drive circuit requires at least 10 transistors.
磁極は、最低10極必要であり、２相モータに比較し、
コスト高となる問題がある。At least 10 magnetic poles are required, and compared to a two-phase motor,
There is a problem of high cost.
微小角を得るため固定子は点対称となっており、回転
積みができず、コア抜き型誤差を吸収することが困難で
ある。In order to obtain a small angle, the stator is symmetrical with respect to the point, so that it cannot be roll-stacked, and it is difficult to absorb an error in the coring die.
本発明は、従来のものの上記課題（問題点）を解決す
るようにした永久磁石形ステッピングモータを提供する
ことを目的とする。An object of the present invention is to provide a permanent magnet type stepping motor which solves the above-mentioned problems (problems) of the conventional one.
［課題を解決するための手段］ 本発明は、当該固定子の内周に、放射状に複数個の磁
極を形成し、各磁極の先端には複数個の極歯を夫々等ピ
ッチで形成し、各磁極には各々180度ずれた磁極が同極
となるように夫々巻線を巻いて成る固定子と、この固定
子の内方に空隙を隔てて同心的に配置され、上記固定子
の極歯ピッチと異なるピッチで、相互に1/2ピッチずら
した極歯ピッチとなる極歯を全周に形成した２個の回転
子磁極と、この回転子磁極によって挟持された軸方向に
着磁された永久磁石とより成る回転子とを備えた永久磁
石形ステッピングモータにおいて、次の構成を備えた永
久磁石形ステッピングモータである。[Means for Solving the Problems] According to the present invention, a plurality of magnetic poles are radially formed on the inner periphery of the stator, and a plurality of pole teeth are formed at an equal pitch at a tip of each magnetic pole, Each of the magnetic poles has a stator formed by winding a winding so that the magnetic poles shifted by 180 degrees become the same pole, and a concentrically arranged inner space of the stator with a gap therebetween, and Two rotor magnetic poles formed on the entire circumference with pole teeth at a pitch different from the tooth pitch and shifted from each other by ピ ッ チ pitch, and are magnetized in the axial direction sandwiched by the rotor magnetic poles A permanent magnet type stepping motor having the following configuration.
（イ）固定子の磁極を６極とし、これを等ピッチに設け
る。(A) The stator has six magnetic poles, which are provided at an equal pitch.
（ロ）第１の固定子磁極の任意の極歯と任意の回転子磁
極の極歯とを正対させた条件において、前記第１の固定
子磁極に隣接する第２の固定子磁極の前記第１の固定子
磁極の極歯に対応する位置の極歯の中心線と、該第２の
固定子磁極から第１の固定子磁極側で最も近接した前記
回転子磁極の極歯の中心線とがなす角をθｒ、回転子磁
極の極歯数をＺとした場合 θｒ＝120゜/Z Ｚ＝6n±４ （但し、ｎは正の整数）とする。(B) Under the condition that an arbitrary pole tooth of the first stator magnetic pole and an arbitrary pole tooth of the arbitrary rotor magnetic pole face each other, the second stator magnetic pole of the second stator magnetic pole adjacent to the first stator magnetic pole. A center line of a pole tooth at a position corresponding to a pole tooth of a first stator magnetic pole, and a center line of a pole tooth of the rotor magnetic pole closest to the first stator pole side from the second stator magnetic pole; DOO if the angle theta r, the pole teeth number of rotor poles and the Z θ r = 120 ° / Z Z = 6n ± 4 (where, n is a positive integer) to.
（ハ）固定子の磁極の極歯ピッチτＳと回転子の極歯ピ
ッチτＲとの相関を τＳ＝180τR/（180±τＲ） 60/τＳ＝ｍ（ｍ＝１、２、・・・・） となるようにする。(C) The correlation between the pole tooth pitch τ S of the magnetic pole of the stator and the pole tooth pitch τ R of the rotor is given by τ S = 180τ R / (180 ± τ R ) 60 / τ S = m (m = 1, 2 , ...)).
（ニ）６極の固定子磁極それぞれに巻回した巻線のう
ち、180度ずれた磁極が同極となるように各々直列接続
した３回路を相互にスター接続して３本のリード線で動
作させる。(D) Of the windings wound around each of the six stator magnetic poles, three circuits connected in series with each other so that the magnetic poles shifted by 180 degrees have the same polarity are star-connected to each other with three lead wires. Make it work.
［実施例］ 以下第１図〜第５図に示す２つの実施例について本発
明を具体的に説明する。[Examples] Hereinafter, the present invention will be specifically described with reference to two examples shown in Figs. 1 to 5.
第１図は本発明の第１の実施例であるステッピングモ
ータの固定子側の構造図を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a structural view of a stepping motor according to a first embodiment of the present invention on a stator side.
同図において10は固定子で、これは６極の固定子磁極
11−１〜11−６と、これら磁極に夫々各磁極は各々180
゜ずれた磁極が同極となるよう巻かれた巻線12−１〜12
−６が設けられている。In the figure, reference numeral 10 denotes a stator, which is a 6-pole stator magnetic pole.
11-1 to 11-6, each of these magnetic poles is 180
巻 線 Windings 12-1 to 12 wound so that the shifted magnetic poles are the same
-6 is provided.
この場合、固定子10は所要枚数の固定子鉄心をその極
歯ピッチが重なるよう同一方向に積層して構成するのが
通例である。In this case, the stator 10 is usually formed by laminating a required number of stator cores in the same direction so that their pole tooth pitches overlap.
なお、回転子は従来のものと同様に、外周に極歯を備
えた磁極の間にＮ、Ｓに着磁した永久磁石を挟持してお
り、２個の磁極の極歯のピッチは1/2ずらしてある。The rotor has N and S permanent magnets sandwiched between magnetic poles having pole teeth on the outer periphery, similarly to the conventional rotor, and the pitch of the pole teeth of the two magnetic poles is 1 /. Two staggered.
ところで、本発明のステッピングモータは、その基本
原理からいえば、次の条件を満足するように回転子磁極
の極歯数Ｚ及びそのほかの構成を定めているものであ
る。By the way, according to the basic principle of the stepping motor of the present invention, the number of pole teeth Z of the rotor magnetic pole and other configurations are determined so as to satisfy the following conditions.
イ．固定子の磁極を６極とし、これを等ピッチに設け
る。I. The stator has six magnetic poles, which are provided at an equal pitch.
ロ．第１の固定子磁極の任意の極歯と任意の回転子磁極
の極歯とを正対させた条件において、前記第１の固定子
磁極に隣接する第２の固定子磁極の前記第１の固定子磁
極の極歯に対応する位置の極歯の中心線と、該第２の固
定子磁極から第１の固定子磁極側で最も近接した前記回
転子磁極の極歯の中心線とがなす角をθｒ、回転子磁極
の極歯数をＺとした場合 θｒ＝120゜/Z ……（１） Ｚ＝6n±４ ……（２） とする。B. Under the condition that an arbitrary pole tooth of the first stator magnetic pole and an arbitrary pole tooth of the arbitrary rotor magnetic pole face each other, the first stator pole of the second stator magnetic pole adjacent to the first stator magnetic pole may be used. The center line of the pole teeth at the position corresponding to the pole teeth of the stator poles and the center line of the pole teeth of the rotor pole closest to the first stator pole side from the second stator pole are formed. When the angle is θ r and the number of pole teeth of the rotor magnetic pole is Z, θ r = 120 ° / Z (1) Z = 6n ± 4 (2)
ハ．固定子の磁極の極歯ピッチτＳと回転子の極歯ピッ
チτＲとの相関を次式とする。C. The correlation between the pole tooth pitch τ S of the magnetic poles of the stator and the pole tooth pitch τ R of the rotor is expressed by the following equation.
τＳ＝180τR/（180±τＲ） ……（３） 60/τＳ＝ｍ（ｍ＝１、２、・・・・） ……（４） この（３）、（４）式の成立について補足すると、回
転子の極歯ピッチτＲはτＲ＝360/Zだから Ｚ＝360/τＲ ……（５） また、固定子の極歯ピッチτＳは、τＳ＝360/（Ｚ±
２）だから Ｚ＝（360/τＳ）±２ ……（６） （５）、（６）式からτＳを求めれば 次式のように（３）式が求められる。τ S = 180τ R / (180 ± τ R ) (3) 60 / τ S = m (m = 1, 2,...) (4) In the equations (3) and (4), Supplementing the establishment, the pole tooth pitch τ R of the rotor is τ R = 360 / Z, so Z = 360 / τ R (5) Further, the pole tooth pitch τ S of the stator is τ S = 360 / ( Z ±
2) Therefore, Z = (360 / τ S ) ± 2 (6) If τ S is determined from the expressions (5) and (6), the expression (3) is obtained as in the following expression.
τＳ＝180τR/（180±τＲ） ……（３） また、磁極の中心に固定子極歯が一致せねばならない
ので次のように（４）式が求められる。τ S = 180τ R / (180 ± τ R ) (3) Also, since the stator pole teeth must coincide with the center of the magnetic pole, the following equation (4) is obtained.
60/τＳ＝ｍ（ｍ＝１、２、・・・・） ……（４） ニ.6極の固定子磁極それぞれに巻回した巻線のうち、18
0度ずれた磁極が同極となるように各々直列接続した３
回路を相互にスター接続して３本のリード線で動作させ
る（第５図（ロ））。60 / τ S = m (m = 1, 2,...) (4) D. Of the windings wound around each of the six stator poles, 18
3 connected in series so that the magnetic poles shifted by 0 degree become the same pole.
The circuits are star-connected to each other and operated by three lead wires (FIG. 5 (b)).
ところで、本発明の第１の実施例のものは、第１図に
示すように、６極の固定子磁極を左右対称となるように
配置し、詳細を後述する第２の実施例において定義付け
る角度αの特殊条件として、α＝０になるように構成し
た永久磁石形ステッピングモータであるが、この場合の
固定子磁極11−１、11−２と回転子13の磁極13−１との
関係を展開図として示せば第２図（イ）の通りである。By the way, according to the first embodiment of the present invention, as shown in FIG. 1, six stator magnetic poles are arranged so as to be bilaterally symmetric, and an angle defined in a second embodiment described later in detail. As a special condition of α, the permanent magnet type stepping motor is configured so that α = 0. In this case, the relationship between the stator magnetic poles 11-1 and 11-2 and the magnetic pole 13-1 of the rotor 13 is described. FIG. 2 (a) is a development view.
但し、13−１は、永久磁石を挟持する２個の磁極のう
ちの手前の１個を示している。However, 13-1 indicates one of the two magnetic poles sandwiching the permanent magnet.
次に、本発明の第２の実施例について説明する。 Next, a second embodiment of the present invention will be described.
第２図（ロ）には、固定子の中心軸と、固定子に奇数
個の極歯を形成した場合における中央の極歯とのなす角
をずれ角αとすると、このずれ角αを０とした前述した
第１の実施例に対して、所定のずれ角αを有するように
構成した第２の実施例の、固定子磁極11−１′、11−
２′と回転子13の磁極13−１との関係を展開図で示して
いる。In FIG. 2 (b), if the angle between the central axis of the stator and the central pole when an odd number of pole teeth are formed on the stator is a shift angle α, this shift angle α is 0. With respect to the first embodiment described above, the stator magnetic poles 11-1 'and 11- of the second embodiment configured to have a predetermined shift angle α
The relationship between 2 'and the magnetic pole 13-1 of the rotor 13 is shown in a developed view.
第２の実施例の構成では、固定子極歯数をＺ、隣接す
る回転子磁極の極歯間ピッチ角をθＰとするとき、ステ
ップ角θＳは３相のモータであるため θＳ＝θP/6となる。In the configuration of the second embodiment, when the number of stator pole teeth is Z and the pitch angle between the pole teeth of adjacent rotor magnetic poles is θ P , the step angle θ S is a three-phase motor, so θ S = θ P / 6.
これら、Ｚ、θＰ、θＳはＺのパラメータであるｎの
値によって第３図に示す図表のように設定される。These Z, θ P and θ S are set according to the value of n which is a parameter of Z as shown in the table of FIG.
［作用］ 本発明のステッピングモータにおいて、第５図（ロ）
に示すように３本の外部リード線を介して、２巻線ずつ
直列接続した３組の回路Ｕ、Ｖ、Ｗにスター接続された
固定子巻線12−１〜12−６に対して第４図（イ）に示す
ような励磁シーケンスを与え、第４図（ロ）のように
〜で示すように電力を順次シフトして供給した場合、
各巻線12−１〜12−６は第５図（イ）に示すように磁極
の移動が行われ、本発明のステッピングモータは前記し
た条件式で決まるステップ角θＳでステップ駆動され
る。[Operation] In the stepping motor of the present invention, FIG.
As shown in the figure, the stator windings 12-1 to 12-6 star-connected to three sets of circuits U, V, W connected in series by two windings via three external lead wires as shown in FIG. When an excitation sequence as shown in FIG. 4 (a) is applied, and power is sequentially shifted and supplied as shown by in FIG. 4 (b),
Each winding 12-1 to 12-6 movement of the pole is carried out as shown in FIG. 5 (b), the stepping motor of the present invention is step driven by a stepping angle theta S determined by the conditional expressions described above.
なお、11−１〜11−６は各巻線12−１〜12−６が巻か
れる固定子磁極を示す。Reference numerals 11-1 to 11-6 denote stator magnetic poles around which the windings 12-1 to 12-6 are wound.
また、以下の説明は簡単のため、ずれ角α＝０となる
本発明の第１の実施例の場合で説明すつが、第２の実施
例のようにずれ角αが生ずる場合でもその動作は変わら
ない。For the sake of simplicity, the following description will be made in the case of the first embodiment of the present invention in which the shift angle α = 0, but even when the shift angle α occurs as in the second embodiment, the operation is the same. does not change.
第３図の図表から、たとえば、ｎを16とした場合、回
転子磁極の極歯数を100としても、0.6度のステップ角と
なり、２相モータでは極歯数を150にしないと、0.6度の
ステップ角とならない点を考慮すると、本発明のステッ
ピングモータは微小角を得易いモータであることが分か
る。From the table of FIG. 3, for example, when n is 16, even if the number of pole teeth of the rotor magnetic pole is 100, the step angle becomes 0.6 degrees, and if the number of pole teeth is not set to 150 in the two-phase motor, 0.6 degrees. In view of the fact that the step angle is not obtained, it can be understood that the stepping motor of the present invention is a motor in which a small angle is easily obtained.
［発明の効果］ 本発明の永久磁石形ステッピングモータは、上記のよ
うに、特定の条件を充足するように構成し、次のような
優れた効果を有するもので、プリンタ、高速FAX、PPC複
写機等の高精度を要する各種OA機器用として有用であ
る。[Effects of the Invention] As described above, the permanent magnet type stepping motor of the present invention is configured to satisfy the specific conditions, and has the following excellent effects, such as a printer, a high-speed fax, and a PPC copy. It is useful for various OA equipment that requires high precision such as machines.
従来の２相モータではリード線を４本、駆動回路のト
ランジスタは８個必要とし、又５相モータではリード線
は５本、上記トランジスタを10個必要としたのに対し、
本発明のものでは３相により駆動できるため、その場合
はリード線３本、トランジスタも６個で済むため駆動回
路の構成が大幅に簡単化でき、安価とできる。A conventional two-phase motor requires four lead wires and eight transistors in the drive circuit, and a five-phase motor requires five lead wires and ten transistors.
In the case of the present invention, driving can be performed in three phases. In that case, only three lead wires and six transistors are required, so that the configuration of the driving circuit can be greatly simplified and the cost can be reduced.
従来のものは、磁極数も２相のものでは８極、５相の
ものでは10極とする必要があったが、本発明のものでは
６極で済み、この点でも構造が簡単となり、製造工程が
簡略化、小型化できる。In the conventional one, the number of magnetic poles had to be 8 in the case of two phases, and ten in the case of the five phases, but in the case of the present invention, the number of poles was only six. The process can be simplified and downsized.
トリクリップルは、従来の２相モータに比べ、1/2と
なり振動が改善できる。The torque ripple is reduced by half compared to the conventional two-phase motor, and the vibration can be improved.
固定子磁極を左右対称に配置するようにし、回転積み
を行う際に、コア抜き型で生じる誤差を吸収できる構造
としたため、位置制御が大幅に増大できる。Since the stator magnetic poles are arranged symmetrically and the structure that can absorb the error generated by the coring die when performing the rotary stacking, the position control can be greatly increased.
第１図〜第５図は本発明の２つの実施例を示すもので、
その内第１図はその第１の実施例となる固定子の縦断面
図、第２図（イ）及び（ロ）はそれぞれ本発明の第１及
び第２の実施例に当たる固定子磁極と回転子磁極の関係
を示す展開図である。 また、第３図は本発明におけるパラメータｎに対応する
極歯数Ｚと回転子磁極の極歯間ピッチθＰおよびステッ
プ角θＳとの関係を示す図表、 第４図（イ）は固定子巻線の励磁のシーケンスを示す波
形図、第４図（ロ）はスター接続し３本のリード線で動
作させるように接続した固定子巻線に供給する３相励磁
電力の切り換えを示す同図（イ）に対応する電流方向の
説明図である。第５図（イ）はそのように切り換える場
合の各固定子巻線の磁極の推移を示す図表、第５図
（ロ）はスター接続し３本のリード線で動作させるよう
に接続した場合の接続図である。 又、第６図は従来例を示すもので、同図（イ）は縦断正
面図、同図（ロ）は（イ）におけるＡ−Ａ′断面図であ
る。10 ：固定子 11−１〜11−6:固定子磁極 12−１〜12−6:固定子巻線13 ：回転子 13−1:回転子磁極 α：ずれ角1 to 5 show two embodiments of the present invention.
1 is a longitudinal sectional view of a stator according to a first embodiment of the present invention, and FIGS. 2A and 2B are stator magnetic poles and rotations corresponding to the first and second embodiments of the present invention, respectively. It is a development view which shows the relationship of a child magnetic pole. The third chart figure showing the relationship between the pole teeth pitch theta P and step angle theta S pole tooth number Z and the rotor magnetic poles corresponding to the parameter n in the present invention, FIG. 4 (b) is a stator FIG. 4 (b) is a waveform diagram showing a sequence of excitation of the windings, and FIG. 4 (b) is a diagram showing switching of three-phase excitation power supplied to a stator winding connected in a star connection and operated by three leads. It is explanatory drawing of the electric current direction corresponding to (a). FIG. 5 (a) is a chart showing the transition of the magnetic poles of each stator winding in the case of such switching, and FIG. 5 (b) is a star connection in the case where the connection is made to operate with three lead wires. FIG. FIG. 6 shows a conventional example. FIG. 6A is a longitudinal sectional front view, and FIG. 6B is a sectional view taken along line AA 'in FIG. 10 : Stator 11-1 to 11-6: Stator magnetic pole 12-1 to 12-6: Stator winding 13 : Rotor 13-1: Rotor magnetic pole α: Deviation angle
Claims (1)
極を形成し、各磁極の先端には複数個の極歯をそれぞれ
等ピッチで形成し、各磁極には各々180度ずれた磁極が
同極となるようにそれぞれ巻線を巻いて成る固定子と、
この固定子の内方に空隙を隔てて同心的に配置され、上
記固定子の極歯と異なるピッチで相互に1/2ピッチずら
した極歯ピッチとなる極歯を全周に形成した２個の回転
子磁極と、この回転子磁極によって挟持された軸方向に
着磁された永久磁石とより成る回転子とを備えた永久磁
石形ステッピングモータとにおいて、次の構成を備えた
ことを特徴とする永久磁石形ステッピングモータ。 （イ）固定子の磁極を６極とし、これを等ピッチに設け
る。 （ロ）第１の固定子磁極の任意の極歯と任意の回転子磁
極の極歯とを正対させた条件において、前記第１の固定
子磁極に隣接する第２の固定子磁極の前記第１の固定子
磁極の極歯に対応する位置の極歯の中心線と、該第２の
固定子磁極から第１の固定子磁極側で最も近接した前記
回転子磁極の極歯の中心線とがなす角をθｒ、回転子磁
極の極歯数をＺとした場合 θｒ＝120゜/Z Ｚ＝6n±４（但し、ｎは正の整数）とする。 （ハ）固定子の磁極の極歯ピッチτＳと回転子の極歯ピ
ッチτＲとの相関を τＳ＝180τR/（180±τＲ） 60/τＳ＝ｍ（ｍ＝１、２、・・・・） となるようにする。 （ニ）６極の固定子磁極それぞれに巻回した巻線のう
ち、180度ずれた磁極が同極となるように各々直列接続
した３回路を相互にスター接続して３本のリード線で動
作させる。1. A plurality of magnetic poles are radially formed on the inner periphery of the stator, and a plurality of pole teeth are formed at an equal pitch at a tip of each magnetic pole, and each magnetic pole is shifted by 180 degrees. Stators each wound by a winding such that the magnetic poles are the same,
Two pole teeth which are concentrically arranged inside the stator with a space therebetween and have a pole tooth pitch shifted from each other by a half pitch at a different pitch from the pole teeth of the stator are formed on the entire circumference. A permanent magnet type stepping motor including a rotor magnetic pole and a rotor comprising an axially magnetized permanent magnet sandwiched between the rotor magnetic poles has the following configuration. Permanent magnet type stepping motor. (A) The stator has six magnetic poles, which are provided at an equal pitch. (B) Under the condition that an arbitrary pole tooth of the first stator magnetic pole and an arbitrary pole tooth of the arbitrary rotor magnetic pole face each other, the second stator magnetic pole of the second stator magnetic pole adjacent to the first stator magnetic pole. A center line of a pole tooth at a position corresponding to a pole tooth of a first stator magnetic pole, and a center line of a pole tooth of the rotor magnetic pole closest to the first stator pole side from the second stator magnetic pole; DOO if the angle theta r, the pole teeth number of rotor poles and the Z θ r = 120 ° / Z Z = 6n ± 4 (where, n is a positive integer) to. (C) The correlation between the pole tooth pitch τ S of the magnetic pole of the stator and the pole tooth pitch τ R of the rotor is given by τ S = 180τ R / (180 ± τ R ) 60 / τ S = m (m = 1, 2 , ...)). (D) Of the windings wound around each of the six stator magnetic poles, three circuits connected in series with each other so that the magnetic poles shifted by 180 degrees have the same polarity are star-connected to each other with three lead wires. Make it work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22312589A JP2844359B2 (en) | 1989-08-31 | 1989-08-31 | Permanent magnet type stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22312589A JP2844359B2 (en) | 1989-08-31 | 1989-08-31 | Permanent magnet type stepping motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0389840A JPH0389840A (en) | 1991-04-15 |
| JP2844359B2 true JP2844359B2 (en) | 1999-01-06 |
Family
ID=16793208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22312589A Expired - Lifetime JP2844359B2 (en) | 1989-08-31 | 1989-08-31 | Permanent magnet type stepping motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2844359B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5128570A (en) * | 1991-06-24 | 1992-07-07 | Japan Servo Co., Ltd. | Permanent magnet type stepping motor |
-
1989
- 1989-08-31 JP JP22312589A patent/JP2844359B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0389840A (en) | 1991-04-15 |
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