Abstract: A rotor composite type three-phase stepping motor having a stator consisting of two stator elements each having 6 n pieces of stator magnetic pole with Ns pieces of pole tooth formed on the tip end of each stator magnetic pole piece, and a permanent magnet held by the two stator elements therebetween, a rotor of magnetic material arranged so as to face to a periphery of the stator through an air gap, Nr pieces of pole tooth being formed on a periphery of the rotor, and exciting windings wound around each stator magnetic pole piece of the stator elements consisting of two sets of three-phase windings each wound around 3n pieces of stator magnetic pole among the 6 n pieces of stator magnetic pole.

Abstract: The permeance between the small teeth provided on the stator magnetic pole and the rotor magnetic pole may be varied regularly according to the rotation of the rotor. The small stator teeth provided on the tip end of each stator magnetic pole are divided into sets of two or three small stator teeth and at least one pitch of the adjacent teeth is different from the other pitch of the other adjacent teeth, so that the vector sum of the quaternary harmonics of permeance in each set is substantially zero.

Abstract: A magnet type stepping motor which has (1) a stator with three-phase stator windings, and 6m pieces of stator main pole arranged side by side, where m is an integer and ≧1, the stator windings of one phase are wound around every two stator main poles among the 6m pieces of the stator main pole, wherein when the stator windings of one phase are excited with a direct current, m pieces of N pole and M pieces of S pole are formed alternately on the 6m pieces of stator main pole, and (2) a rotor of a cylindrical permanent magnet magnetized in the circumferential direction to form Z/2 pieces of N pole and Z/2 pieces of S pole alternately, where Z is the number of rotor poles.

Abstract: A magnet type stepping motor which has (1) a stator with three-phase stator windings, and 6m pieces of stator main pole arranged side by side, where m is an integer and ≧1, the stator windings of one phase are wound around every two stator main poles among the 6m pieces of the stator main pole, wherein when the stator windings of one phase are excited with a direct current, m pieces of N pole and M pieces of S pole are formed alternately on the 6m pieces of stator main pole, and (2) a rotor of a cylindrical permanent magnet magnetized in the circumferential direction to form Z/2 pieces of N pole and Z/2 pieces of S pole alternately, where Z is the number of rotor poles.

Abstract: Disclosed is a multi-phase electric rotating machine having toroidal coils that consists of a stator having the number P of stator units (P is integer, P≧2), a rotor facing the stator with a predetermined air gap. Each of stator units is formed of a pair of stator iron cores and a toroidal coil that concentrically gets caught therebetween. Each of the stator iron cores has the number Ns of stator teeth formed around an inner circumference at equal pitch Ps, the pair of stator iron cores are arranged such that the stator teeth are shifted by ½ of the pitch Ps. The stator units are arranged in the axial direction such that the stator teeth of the units are shifted by ½P of the pitch Ps. The rotor consists of rotor magnetic bodies and a permanent magnet. Rotor teeth of Nr in the total number are arranged around the outer circumference of the rotor. The rotor teeth consist of k pair of N and S polar rotor teeth groups (k is integer, k ≧1) arranged in the rotating direction.

Abstract: A rotor composite type three-phase stepping motor having a stator consisting of two stator elements each having 6 n pieces of stator magnetic pole with Ns pieces of pole tooth formed on the tip end of each stator magnetic pole piece, and a permanent magnet held by the two stator elements therebetween, a rotor of magnetic material arranged so as to face to a periphery of the stator through an air gap, Nr pieces of pole tooth being formed on a periphery of the rotor, and exciting windings wound around each stator magnetic pole piece of the stator elements consisting of two sets of three-phase windings each wound around 3n pieces of stator magnetic pole among the 6 n pieces of stator magnetic pole.

Abstract: A two-phase permanent-magnet electric rotating machine in which vibration and noise are less is provided. The machine is constituted by: a stator having 2n main poles (n being an integer satisfying n≧2) each of which has at its end portion a predetermined number of magnetic teeth and has a winding provided thereon; and a rotor having permanent magnets formed so that N (north) and S (south) equal in number of the permanent magnets are alternately disposed in a direction of rotation of the rotor; wherein 2(n−1) alternate ones of the main poles are made to be in-phase and a half ones of the in-phase main oles have a polarity which is opposite to a polarity of the other ones. It is preferable to make the number of the magnetic pole pairs of N and S of the rotor be 4m±1 (m being an integer satisfying m≧1) when the value n is set to 2. It is preferable to form the windings so that the in-phase main poles of the stator are made to be alternately inverted in polarity.

Abstract: A three-phase stepping motor comprising: a rotation shaft rotatably supported by a pair of bearings provided in predetermined places of a housing so as to be in opposition to each other; a permanent-magnet rotor formed in a cylindrical shape so as to have south (S) and north (N) poles magnetized alternately in the direction of rotation on an outer circumferential portion of the rotor, or an induced magnetization rotor having S and N poles disposed alternately in the direction of rotation which are formed in a manner so that permanent magnets with the same polarity are fitted or formed so as to be identical in polarity at their surfaces in grooves formed parallelly to each other at a regular pitch in a surface of a magnetic body formed to be cylindrical in parallel to the rotation shaft and the cylindrical magnetic body is subjected to induced magnetization to form the S and N poles alternately in the surface of the cylindrical magnetic body; and a stator disposed so as to be in opposition to a surface of one

Abstract: A magnet type stepping motor which has (1) a stator with three-phase stator windings, and 6m pieces of stator main pole arranged side by side, where m is an integer and .gtoreq.1, the stator windings of one phase are wound around every two stator main poles among the 6m pieces of the stator main pole, wherein when the stator windings of one phase are excited with a direct current, m pieces of N pole and M pieces of S pole are formed alternately on the 6m pieces of stator main pole, and (2) a rotor of a cylindrical permanent magnet magnetized in the circumferential direction to form Z/2 pieces of N pole and Z/2 pieces of S pole alternately, where Z is the number of rotor poles.

Abstract: A rotor composite type three-phase stepping motor having a stator consisting of two stator elements each having 6 n pieces of stator magnetic pole with Ns pieces of pole tooth formed on the tip end of each stator magnetic pole, and a permanent magnet held by the two stator elements therebetween, a rotor of magnetic material arranged so as to face to a periphery of the stator through an air gap, Nr pieces of pole tooth being formed on a periphery of the rotor, and exciting windings wound around each stator magnetic pole of the stator elements consisting of two sets of three-phase windings each wound around 3 n pieces of stator magnetic pole among the 6 n pieces of stator magnetic pole. A mechanical degree angle formed between the adjacent magnetic poles in the 3 n pieces of magnetic pole with each set of three-phase windings is 60.degree. m/n and a mechanical degree angle formed between the 3 n pieces of magnetic pole with each set of three-phase windings is (60.degree. m/n-.theta.

Abstract: A magnet type stepping motor which has (1) a stator with three-phase stator windings, and 6 m pieces of stator main pole arranged side by side, where m is an integer and.gtoreq.1, the stator windings of one phase are wound around every two stator main poles among the 6 m pieces of the stator main pole, wherein when the stator windings of one phase are excited with a direct current, m pieces of N pole and M pieces of S pole are formed alternately on the 6 m pieces of stator main pole, and (2) a rotor of a cylindrical permanent magnet magnetized in the circumferential direction to form Z/2 pieces of N pole and Z/2 pieces of S pole alternately, where Z is the number of rotor poles.

Abstract: A multi-phase permanent-magnet type electric rotating machine comprising: a permanent magnet type rotor, the permanent magnet type rotor including pairs of magnetic bodies magnetized by an axially magnetized cylindrical permanent magnet and disposed so as to face each other in a manner so that different poles of the magnetic bodies are disposed alternately or including a cylindrical permanent magnet having a multi-polar-magnetized outer circumferential surface; and a stator disposed so as to face the rotor through an air gap therebetween, the stator having 6N or 10N (N being an integer not smaller than 1) main poles formed in a distributed fashion, the stator having coils wound on 3N or 5N in total of the 6N or 10N main poles selected every other one, wherein the coils wound on the 3N or 5N main poles are connected so as to form a star connection and at least one of the three or five terminals of the star connection of the coils is connected to a predetermined polarity of a power supply while all or part of t

Abstract: A three-phase permanent-magnet electric rotating machine having necessary performance which can be realized easily at a low cost, wherein a stator includes a stator iron core having a disc portion and 3n magnetic poles formed so as to be erected at right angles from an outer circumference of the disc portion, and excitation windings mounted on the magnetic poles so as to have a predetermined width in the axial direction, and wherein a rotor is constituted by permanent magnets magnetized into N and S poles arranged alternately in the direction of rotation of the rotor and the rotor is supported so as to face the top ends of the respective magnetic poles of the stator through a predetermined air gap. In this case, the number n is an integer not smaller than 1. Alternatively, n may be selected to be an even number not smaller than 2 so that the excitation windings may be mounted on every other one of the magnetic poles.

Abstract: A two-phase permanent-magnet electric rotating machine in which vibration and noise are less is provided. The machine is constituted by: a stator having 2.sup.n main poles (n being an integer satisfying n.gtoreq.2) each of which has at its end portion a predetermined number of magnetic teeth and has a winding provided thereon; and a rotor having permanent magnets formed so that N (north) and S (south) equal in number of the permanent magnets are alternately disposed in a direction of rotation of the rotor; wherein 2.sup.(n-1) alternate ones of the main poles are made to be in-phase and a half ones of the in-phase main oles have a polarity which is opposite to a polarity of the other ones. It is preferable to make the number of the magnetic pole pairs of N and S of the rotor be 4m .+-. 1 (m being an integer satisfying m.gtoreq.1) when the value n is set to 2. It is preferable to form the windings so that the in-phase main poles of the stator are made to be alternately inverted in polarity.

Abstract: A permanent magnet type stepping motor wherein and that at least one pitch formed by two adjacent small pole teeth of each of stator magnetic poles is different from other pitch formed by other two adjacent small pole teeth of each of the stator magnetic poles, wherein the tooth width of at least one of the two adjacent small pole teeth forming the different pitch is made different from that of the remaining small pole teeth, each stator magnetic poles having at least four small pole teeth and wherein a rotor has a rotor magnetic pole having a plurality of small pole teeth arranged at equal pitches, facing said stator magnetic poles through a gap. A permanent magnet type stepping motor has a stator having n pieces of stator magnetic pole each having m pieces of pole tooth, and a rotor having a plurality of pole teeth arranged at equal pitches n is an integer not less than three, m is an even number not less than four, a pitch of the rotor pole teeth is 2.pi.

Abstract: A permanent magnet type brushless motor wherein the number of a stator magnetic poles is 3 m (where m is an integer not less than 2), Z pieces of N pole and Z pieces of S pole (where Z is m (3n.+-.1), and n is an integer not less than 2) are magnetized alternately with the same pitch, and an angle formed between a center of N pole of the permanent magnet corresponding to a pole tooth at the center of any one of the stator magnetic poles and a center of S pole of the permanent magnet corresponding to a pole tooth at the center of one of the stator magnetic poles adjacent to the any one of the stator magnetic poles is 360.degree. (n.+-.1/2)/Z.

Abstract: A data array conversion control system comprises a first data processing unit (1) for processing character code data and image data and a second data processing unit (2) for processing the character code data of the same data array and the image data of a different data array, and the first and second data processing units (1) and (2) are connected with each other through a data array converting unit (3) for converting the data array of the image data based on switching signals, which are applied from the first data processing unit (1) to the data array converting unit (3) in a unit of one word data together with the transfer data, so that the data array of the image data is converted.

Abstract: A hybrid stepping motor in which each of two rotor yokes constituting a rotor is divided in its axial direction into at least two rotor yoke portions, the rotor yoke portions constituting one rotor yoke being made to abut on each other with their pole teeth shifted from each other in angular position by .theta..sub.0, the two rotor yoke portions belonging to the two rotor yokes respectively and sandwiching a permanent magnet therebetween being arranged with their pole teeth shifted from each other in angular position by 180/Nr degrees (.pi. radian in electric angle) under the condition that a relation of 0<.theta..sub.0 <90/Nr degrees is satisfied, and a rotor of a hybrid stepping motor in which two or more rotor units are arranged with their pole teeth shifted from each other in angular position by an angle smaller than 1/4 of the angular pitch with which the pole teeth are provided.

Abstract: The invention relates to a structure of a three-phase permanent magnet stepping motor in which vibration and noise can be reduced and lowering of its output can suppressed even in a high-pulse region. To this end, the motor has a three-phase, six-pole, permanent magnet stator structure, and a rotor structure having alternately arranged N and S poles the total number P of which is selected to satisfy the conditional equation of P=12n.+-.4 (n being a positive integer).The present invention is applicable to both the inner-rotor and outer-rotor structures. Further, in both the cases of the inner- and outer-rotor structures, the alternate arrangement of N and S magnetic poles of the rotor may be realized by an arrangement using a two-pole magnetized permanent magnet constituted by a combination of two claw poles, in place of the arrangement in which N and S magnetic poles are formed by directly magnetizing the outer or inner circumferential surface of a cylindrical magnet.

Abstract: An inner- or outer-rotor type three-phase permanent magnet stepping motor constituted by a stator having circumferentially equidistantly arranged three magnetic poles each having small teeth equal in number and in pitch, and a rotor rotatably arranged along the circumference of the stator and constituted by a cylindrical permanent magnet magnetized to provide circumferentially alternately arranged pairs of north and south poles, the number of the pairs being selected to Zm under the condition that Zm satisfies Zm=3n-1 or Zm =3n+1 (n being a natural number not smaller than 1). Alternatively, the rotor is constituted by a ring-like permanent magnet magnetized so as to form two magnetic poles in the axial direction thereof and a pair of gear-like magnetic bodies each having Zr teeth on its circumference are arranged respectively on the axially opposite ends of the ring-like permanent magnet.