Abstract: An exemplary permanent-magnet synchronous machine is disclosed with a stator and a rotor located at the distance of the air gap (?1) from the stator. The rotor is supported on the shaft in a rotating arrangement, and a maximum value has been determined for the eccentricity between the stator and the rotor. The value is higher than one-tenth of the air gap. The magnetization of the synchronous machine is arranged with permanent magnets fitted in the rotor for creating a magnetic flux (?) which is closed via the stator, the air gap (?1), and the rotor. A relation H?(10*???)*?r applies between the thickness of the permanent magnet and the maximum value of eccentricity ?, wherein ? is the dimensioning value of the air gap and ?r is the relative permeability of the permanent magnet.

Abstract: The embedded permanent magnet electric motor includes: a rotor having: a rotor core that has an outer circumferential surface that is constituted by a plurality of convex surfaces that are circular arc-shaped curved surfaces that are arranged continuously at a uniform angular pitch circumferentially; and a plurality of permanent magnets that are embedded in the rotor core so as to be positioned on a radially inner side of each of the circular arc-shaped curved surfaces; and a stator having: a stator core in which teeth are respectively disposed so as to extend radially inward from an annular core back and are arranged at a uniform angular pitch circumferentially to configure open slots; and a stator coil that is constituted by a plurality of concentrated winding coils that are wound into concentrated windings on each of the teeth.

Abstract: An electric motor (M) includes first and second stators (12L, 12R) on the outside forming a rotating magnetic field, an outer rotor (13) disposed inside the first and second stators (12L, 12R) and having first and second induced magnetic poles (38L, 38R), and an inner rotor (14) disposed inside the outer rotor (13) and having first and second permanent magnet (52L, 52R). The phases of the first and second induced magnetic poles (38L, 38R) of the outer rotor (13) are displaced from each other by only half of a predetermined pitch, and the phases of the first and second permanent magnets (52L, 52R) of the inner rotor (14) are displaced from each other by only the predetermined pitch. Accordingly, the first and second stators (12L, 12R) facing the first induced magnetic poles (38L) and the second induced magnetic pole (38R) can be made to have the same phase and polarity, thus simplifying the structures of the first and second stators (12L, 12R).

Abstract: A unidirectionally-energized brushless DC motor includes a disk attached to a frame, a plurality of plate-like permanent magnets disposed on the disk at equal intervals around the disk, magnetic cores fixed to the frame according to the plurality of permanent magnets, windings each of which is wound around the magnetic core and to which DC power is supplied, a predetermined number of magnetic cores fixed to the frame, and windings each of which is wound around the magnetic core and connected to a power consumption device. The permanent magnets are located such that an angle formed by a straight line passing through the center of the disk and the center of the permanent magnet and a normal line in the center of a magnetic pole plane of the permanent magnet ranges from 0° to 60°.

Abstract: An electric motor having a rotation shaft includes a motor housing into which the electric motor is accommodated, at least one pair of rolling bearings positioned in the motor housing and rotatably supporting both ends of the rotation shaft, and a displacement restriction member provided inside the motor housing and restricting a displacement of the rolling bearing in an axial direction of the rolling bearing. Each rolling bearing includes an inner race, an outer race, and rolling elements rotatably supported between the inner race and the outer race. The inner race is press fitted without any gaps onto an outer peripheral surface of the rotation shaft, and the outer race is press fitted without any gaps into a bearing attachment portion provided inside the motor housing.

Abstract: “IMPROVEMENT IN ELECTRICAL EQUIPMENT GENERATOR OF ELECTRICAL POWER”, the invention herein refers to improvements in electrical power generating equipment which, due to the construction adopted, allows simplified maintenance at reduced frequency; in addition to useful application in several types of hydro electrical power plants, namely: micro, mini and small sized hydroelectric power plants.

Abstract: An accommodating recess (21A, 21B) has a magnet accommodating portion (19A, 19B) for accommodating a permanent magnet (17A, 17B) and a cavity (20A, 20B), which is located at the q-axis side of the magnet accommodating portion. The cavity opens through a rotor outer circumferential surface (162). A starting point (Pa1, Pb1) of an outer cavity forming surface (201A, 201B) is located on the rotor outer circumferential surface. The outer cavity forming surface intersects either a magnetic pole surface or an imaginary extended plane (23A, 23B) of a magnetic pole facing surface (191A, 191B). The rotor outer circumferential surface (162) includes portions of an imaginary annular line (E). A starting point (Pa1, Pb1) of the outer cavity forming surface (201A, 201B) is located between the d-axis and an intersection point (Qa, Qb) between the imaginary annular line and the imaginary extended plan of the magnetic pole facing surface.

Abstract: An AC electric motor includes an annular A-phase winding WA wound in the circumferential direction of a stator, a stator pole group SPGA configured to generate magnetic flux ?A to interlink with the A-phase winding WA, an annular B-phase winding WB wound in the circumferential direction, and a stator pole group SPGB configured to generate magnetic flux ?B to interlink with the B-phase winding WB. The motor additionally includes a third stator pole group SPGC, N and S magnetic poles of the rotor, and X magnetic poles, which serve as third rotor poles, showing magnetic characteristics between the N and S magnetic poles of the rotor. DC currents are supplied to the A-phase and B-phase windings WA and WB to generate rotational torque.

Abstract: In implementations of the present disclosure, a rotating electric machine includes a rotor assembly supported for rotation about a rotational axis, the rotor assembly including a plurality of rotor poles, the rotor poles being supported for rotation about the rotational axis, and a stator assembly including a plurality of independent stator modules with each stator module including multiple independently energizable stator segments, each stator segment defining a plurality of stator poles of the stator assembly for magnetically interacting with the rotor poles, each stator module being independently removable and replaceable from the stator assembly to adjust the total number of stator poles included in the stator assembly, and/or to vary the maximum power output of the electric machine.

Abstract: An energy converter includes magnetic coils of N phases (N is an integer of 3 or more), and a PWM drive circuit for driving the magnetic coils of N phases, wherein the magnetic coil of each phase can be independently controlled by the PWM drive circuit.

Abstract: An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged close to the outer periphery of the rotor so as to have a difference in angle (?/2) with respect to the center of rotation of the rotor, a differential operational circuit performing differential operation on detection signals output by the magnetic sensors to output a differential signal, and the angle calculating circuit calculating the angle of rotation of the rotating shaft based on the differential signal. The planar shape of the rotor is such that the sum of the distances between the center of rotation and the respective two points where two straight lines crossing at the center of rotation at a crossing angle of (?/2) cross the outer periphery of the rotor is constant, and the planar shape is symmetric with respect to a straight line passing through the center of rotation.

Abstract: A magnetizer for magnetizing permanent magnets positioned in-situ a mechanical member is disclosed. The magnetizer comprises at least one primary superconducting coil configured to project a magnetic field flux configuration of a first type to at least a portion of a distal volume of a first type, and at least two auxiliary coils symmetrically disposed about the at least one primary superconducting coil and configured to project magnetic field flux configurations of a second type to at least a portion of a distal volume of a second type. A method of magnetizing a permanent magnet in-situ within a mechanical member is also disclosed.

Abstract: According to one embodiment, a permanent-magnet type electric rotating machine has a stator, a magnetizing coil, a rotor and a case. The stator has an armature coil configured to form a magnetic circuit for driving. The magnetizing coil is configured to form a magnetic circuit for magnetizing. The rotor has a constant magnetized magnet, a rotor core and a variable magnetized magnet. The rotor core holds the constant magnetized magnet. The constant magnetized magnet is arranged closer to the magnetic circuit for driving than the variable magnetized magnet. The variable magnetized magnet is arranged closer to the magnetic circuit for magnetizing than the constant magnetized magnet.

Abstract: A rotor includes first and second permanent magnets provided in each magnetic pole inside a rotor core. The rotor is configured such that when a first end of the first permanent magnet located on the outer circumferential side of the rotor core and the second permanent magnet side is located at a position that faces a first end in the circumferential direction of one of teeth of a stator, a second end of the first permanent magnet located on the axis of rotation side of the rotor core and the second permanent magnet side is located at a position that faces a second end in the circumferential direction of the tooth that faces the first end of the first permanent magnet.

Abstract: The invention provides a self-contained generator which converts the gravitational potential energy of water into electrical power, while continually replenishing its water reservoir. The Hydro Electric Portable Generator is a free-standing, gravity-fed, micro-Hydro Electric turbine-style generator. The water is provided from an elevated tank and the flow pressure is provided through the penstock, a series of diminishing diameter reducer pipes, as the water approaches the turbine.

Abstract: In a rotor of an electric machine, which rotor consists of individual segments which each have a first part which is in contact with a second cooperating part wherein the first part of an individual segment and the second cooperating part of an adjacent individual segment are positively interlocked in the radial and circumferential directions resulting in a self-supporting annular structure of the assembled rotor. The individual sections have openings accommodating permanent magnets which are fixed in the openings by wall sections bent into the openings during assembly of the segments for fixing the permanent magnets in the openings as the individual segments are joined to form a ring.

Abstract: A rotor for a rotary electric machine includes a plurality of magnetic poles disposed at intervals in a circumferential direction, on an outer periphery of a rotor core that is a steel sheet stack that has a shaft hole in a central portion thereof configured so that a shaft is passed through and fixed to the shaft hole. The magnetic poles each have two permanent magnets and a magnetic flux suppression hole that regulates flow of magnetic flux from the permanent magnets, and are formed in such a manner that a shape of the magnetic flux suppression hole of at least one magnetic pole is different from a shape of the magnetic flux suppression hole of another magnetic poles, depending on the presence or absence of a positioning portion.

Abstract: An iron rotor core includes a first permanent magnet in an outer peripheral portion of the iron rotor core, second permanent magnets on both circumferential sides of the first permanent magnet and arranged in a generally V-shaped configuration opening radially outward, and a first region provided opposite to the first permanent magnet radially inside the region between the second permanent magnets and having a low magnetic permeability. A q-axis magnetic flux path is formed in an iron core region among the first permanent magnet, the second permanent magnets and the first region, and a central portion thereof is formed between the first permanent magnet and the first region, and entrance/exit portions of the q-axis magnetic flux path formed between the second permanent magnets and second regions provided on both circumferential sides of the first permanent magnet and having a low magnetic permeability with generally the same width.

Abstract: A brushless DC motor includes a plurality of permanent magnet segments arranged on an outer circumferential surface of a yoke member. Each of the permanent magnet segments includes a thinnest portion positioned in a circumferential center portion of each of the permanent magnet segments, thickest portions positioned in circumferential opposite end portions of each of the permanent magnet segments, and gradually changing portions positioned between the thinnest portion and the thickest portions. The gradually changing portions have a thickness gradually increasing from the thinnest portion toward the thickest portions. A border between the magnetic poles is positioned in the circumferential center portion of each of the permanent magnet segments.

Abstract: A rotor assembly including a rotating shaft, a rotor core, a permanent magnet, a magnetic ring support, and a magnetic ring. The permanent magnet is mounted on the outer side surface of the rotor core. The magnetic ring is nested on the magnetic ring support, and the magnetic ring support and the rotor core are made as a whole by injection molding. The rotor assembly is relatively simple to produce, low in cost, and features improved efficiency.

Abstract: This rotating electric machine includes a rotor including a rotating shaft portion, a rotor yoke surrounding the rotating shaft portion and a rotor core, arranged on the outer peripheral surface of the rotor yoke, having a plurality of permanent magnets circumferentially arranged thereon at intervals, and a stator arranged to be opposed to the outer peripheral surface of the rotor, while the rotor yoke and the inner peripheral portion of the rotor core are fixed to each other with a fixing member.

Abstract: In a three-phase permanent-magnet synchronous machine, a pole gap and a skew of permanent magnets on the rotor are designed such that oscillating torques which are caused by the fifth and seventh harmonics of the stator field and of the rotor field are mutually reduced. In particular, the skew can be chosen as a function of the pole gap, such that the majority of the respective oscillating torques is neutralized. This results in minimal torque ripple.

Abstract: A brushless fan motor includes a case, a tubular part disposed in the case and fixed at a bottom of the case, at least a bearing disposed in the tubular part, a toric coil surrounding the tubular part, and a rotating assembly. The rotating assembly includes a turntable, a rotating shaft, a loading ring, a permeability metal element and a toric radial magnet. The turntable has a top surface and fan blades disposed on the top surface. The rotating shaft is disposed through the bearing and connected to the turntable. The loading ring connected to the turntable surrounds the toric coil. The permeability metal element includes an annular part fixed at an inner wall of the loading ring. The toric radial magnet is fixed at an inner wall of the annular part. A positive airway pressure breathing apparatus using the brushless fan motor is also provided.

Abstract: A rotary electric machine rotor is provided with a rotor shaft, a rotor core, and a group of permanent magnets. The rotor core includes a group of flux barriers arranged at intervals. At least one of the flux barriers includes at least one bridge joining an inner edge and an outer edge of that flux barriers. The permanent magnets are arranged at the rotor core between the flux barriers as viewed in the cross sectional plane.

Abstract: A magnet comprising grains of a ferromagnetic material whose main component is iron and a fluorine compound layer or an oxy-fluorine compound layer of fluoride compound particles of alkali metals, alkaline earth metals and rare earth elements, present on the surface of the ferromagnetic material grains, wherein an amount of iron atoms in the fluorine compound particles is 1 to 50 atomic %.

Abstract: In a ferromagnetic material containing at least one kind of rare-earth element, a layer containing at least one kind of alkaline earth element or rare-earth element and fluorine is formed at the grain boundary or near the powder surface of the ferromagnetic material. A further layer containing at least one kind of rare-earth element, having a fluorine concentration lower than that of the layer described first and having a rare-earth element concentration higher than that of the host phase of the ferromagnetic material, or an oxide layer containing a rare-earth element is formed in adjacent with a portion of the layer described first.

Abstract: There is provided a base assembly for a motor, including: a base member having a shaft system of the motor mounted therein; a pulling plate bonded to the base member to prevent excessive floating of the motor; and at least one adhesive filling part formed in the pulling plate, and providing an adhesion space for an adhesive used for bonding the pulling plate to the base member to increase a contact area with the adhesive.

Abstract: A rim driven electrical machine for interaction with a flow of water, comprising: a rotor mounted within a housing, the rotor including at least one circumferential conductor and a central passageway, the central passageway for receiving at least one blade arrangement for rotational interaction with a fluid within the central passageway, and; a stator supported by the housing and arranged circumferentially around the rotor, the stator including windings for providing a travelling electromagnetic wave for interaction with the at least one circumferential electrical conductor of the rotor, wherein the stator extends only partially around the circumference of the rotor so as to have a first end and a second end separated by an arcuate angle.

Abstract: A compact, light permanent magnet motor with low torque pulsations is obtained by reducing a cogging torque resulting from variations at the end of a rotor, such as an error in attachment position and a variation in magnet characteristic of the permanent magnets. A permanent magnet rotating electrical machine includes a rotor having a rotor core and plural magnetic poles formed of permanent magnets provided to the rotor core, and a stator having plural teeth opposing the plural magnetic poles, a stator core provided with slots in which to store an armature winding wire wound around the teeth, and supplemental grooves provided to the teeth in portions opposing the rotor in an axial direction of the stator core.

Abstract: A rotor (100) having a first plurality of laminates (110), comprising a first plurality of protrusions (120) located at a periphery of each of the first plurality of laminates, and a second plurality of laminates (1101), arranged differently from the first plurality of laminates (110) around a shaft hole (132), comprising a second plurality of protrusions (120?) located at a periphery of each of the second plurality of laminates, wherein the first plurality of protrusions are asymmetric and/or angularly offset from the second plurality of protrusions, and wherein the second plurality of protrusions are asymmetric and/or angularly offset from the first plurality of protrusions. The rotor further having a plurality of magnets (115), each inserted between the first plurality of protrusions and/or the second plurality of protrusions, wherein reactive forces operate to hold the plurality of magnets.

Abstract: It comprises stator including stator core having yoke and a plurality of teeth protruded from yoke, which is formed with slots between adjacent teeth, and rotor having rotor core and permanent magnet formed with a plurality of magnetic poles, which confronts tip ends of teeth via gaps, wherein rotor core is formed by rotor core materials circumferentially equally divided into the predetermined number of divisions, and the least common multiple being N for the number of slots and the number of magnetic poles and the least common multiple being M for the number of slots and the number of divisions, then N is equal to M.

Abstract: A brushless motor includes a two-phase winding stator having 4×n winding poles and auxiliary poles provided between the winding poles, and a rotor constituted by 6×n permanent magnet rotating poles having divided angle. The two-phase brushless motor can be driven by a control device for the two-phase motor which can transform electric power and rectify electronically. The two-phase brushless DC motor can increase a permeance coefficient of the rotor, improve the efficiency and the starting of the motor, and reduce torque ripple and noise thereof.

Abstract: The present invention relates to a permanent-magnet synchronous motor, particularly an electric three-phase motor, comprising a stator having a stator yoke in which stator teeth with interposed stator grooves are arranged, wherein on each stator tooth at least one winding is provided, further comprising a rotor having permanent magnets, wherein the stator teeth are arranged in layers as disks in the axial direction of the stator and designed at least as two different disks, wherein the stator teeth in a first disk are connected peripherally among each other at the ends thereof pointing toward the rotor in the form of a stator star by a connecting bridge and in a second disk have an interruption instead of the connecting bridge. The present invention further relates to an electric power-assisted steering system.

Abstract: A brushless motor includes a rotor and a stator. The rotor is provided with a rotor core including a plurality of magnet poles and a plurality of core poles. A void is formed at a boundary between each core pole and an adjacent magnet pole in the circumferential direction. Each magnet pole includes a peripheral core portion located closer to the stator than the magnet in the radial direction of the rotor. The void formed in at least one of two circumferential sides of each magnet pole includes an extended void region that extends into the peripheral core portion toward a middle point of the magnet pole in the circumferential direction.

Abstract: A Magnetic Invention, or a magnetic field power convertor, provided with a driveshaft inserted transversely through a custom rare-earth neodymium magnet. This combination is then mounted inside a cylindrical electromagnet. Two sets of coils, referred to as the motor coils and the generator coils, are designed with a custom-built proximity switch and pulser system. The duration and amount of the input pulse and energy are minute and the output energy from the Magnetic Invention occurs continuously throughout the entire cycle.

Abstract: There is provided a rotor core which increases the quality and reliability thereof by preventing the occurrence of a core separation of the rotor core. There is provided a rotor core including a plurality of substantially cylindrical core blocks which are stacked on each other; and a plurality of magnets, characterized in that a plurality of magnet holes extending in an axial direction are provided in the plurality of core blocks so as to extend over the plurality of core blocks in that the plurality of magnets are accommodated in each of the plurality of magnet accommodation holes and fixed therein with a resin, and in that an axial position of core block boundary planes where the plurality of core blocks are brought into abutment with each other and an axial position of magnet boundary planes where the plurality of magnets are brought into abutment with each other differ from each other.

Abstract: A magnetic field interactive material being part of a machine component or mechanism utilizing magnetic or electro-magnetic field forces in said components operation and comprising specifically located magnetic particles incorporated into a non homogeneous amalgamation within the matrix or structural matrix of primarily a metal material differing from that of the magnetic particles therein forming an integrated component possessing magnetic field interactive capabilities, allowing such magnetic field interactive components to have a wide array of uses one of which is associated with Hybrid and Electric Vehicles.

Abstract: The device comprises a single circular row of permanent magnetic poles and a circular row of electromagnets, magnetic-force-conducting elements of which have central polar part and two lateral polar parts connected to the central polar part and spaced from opposing (in the direction which is essentially perpendicular to the rotation axis) sides of the central polar part. Winding is situated upon central polar part. The part of winding positioned between the polar parts of the magnetic-force-conducting element is more than half the length of the whole winding. Central polar part may have at least one groove. The distance between the centers of adjacent polar surfaces of the magnetic-force-conducting element is set depending on the angle between the magnetic poles in the circular row. The angular dimension of the polar surface of the lateral polar part depends on the angular dimension of the polar surface of the central polar part.

Abstract: The present invention relates to a motor that acts both as a synchronous motor and as an induction motor, and that comprises a stator (100) having coil windings, a rotor (200), where said rotor is a rotor with magnets (300, 310, 320, 330) generating 4 poles, and the windings of the stator (100) can be switched so as to change the number of poles. The subject motor acts as a synchronous motor when in low rotation and as an induction motor when in high rotation. During its operation as an induction motor, rotors (200) are utilized having a protuberance ratio near 1, generating a sufficient flux to reach good efficiency levels with 2 poles, which prevents the motor from having torque oscillations during its operation, providing a motor with a lighter operation and a better performance and less noise.

Abstract: A magnet that includes a composite body and at least one reinforcing element. The reinforcing element is embedded within the body and increases the radial strength of the body. As a result, the magnet is able to rotate at higher speeds without fracturing. Additionally, methods of manufacturing the magnet are described.

Abstract: A permanent magnet machine includes two stationary stators and a rotating rotor. Electromagnetic fields occurring in one stator are displaced by an angle of thirty electrical degrees with respect to electromagnetic fields occurring in the other stator due to currents fed to the stators.

Abstract: A rotor includes a hub, a rotor core, holes and permanent magnets. Salient poles are each formed between neighboring openings on a circumference of the rotor core and, when viewed from a front along a line of axis of the rotor, a recessed portion that is formed by causing one portion of an inner circumferential surface of the rotor core to bulge radially outward of another portion is provided in a region enclosed by a first virtual line connecting a center of the hub and a circumferential middle position on the circumference of a magnetic pole of the rotor core having permanent magnets provided therein and a second virtual line connecting the center of the hub and a circumferential middle position on the circumference of the salient pole adjacent to the magnetic pole at a leading side in a rotational direction of the rotor.

Abstract: A motor for a compressor comprises: a stator including a plurality of slots each having a slot opening, teeth formed between neighboring slots; and a rotor arranged at an inner side of the stator, a number of permanent magnet holes, the number of which is same as a number of magnetic poles, and permanent magnets. The rotor includes at least a first pair of slits, provided at an outer peripheral core part of the permanent magnet inserting hole, extending orthogonally to the inserting hole, arranged symmetrically with respect to a magnetic pole center, and a distance between the first pair of slits is smaller than a width of the teeth; and a second pair of slits, arranged at an outer inter-pole side of the first pair of slits, provided at a position where the tooth and the magnetic pole center of the rotor match, and facing the slot openings.

Abstract: It comprises stator including stator core having yoke and a plurality of teeth protruded from yoke, which is formed with slots between adjacent teeth, and rotor having rotor core and permanent magnet formed with a plurality of magnetic poles, which confronts tip ends of teeth via gaps, wherein rotor core is formed by rotor core materials circumferentially equally divided into the predetermined number of divisions, and the least common multiple being N for the number of slots and the number of magnetic poles and the least common multiple being M for the number of slots and the number of divisions, then N is equal to M.

Abstract: An electric motor and conversion system includes a direct current power source, a rotor with two sides and two series of permanent magnets alternating in polarity, two stators on opposing sides of the rotor where each stator has a series of winding coils, magnet position identifiers, and a control system comprising a sensor that cooperates with the magnet position identifiers and a microcontroller to individually controls winding drivers. Preferably, the number of magnets on the rotor does not equal the number of winding coils on the stators. Also preferably, the magnet position identifiers are a series of apertures on the rotor through which signals pass. The conversion system can also include connectors for connecting to an axle, a removable throttle, and electric cables for electrically connecting the components.

Abstract: Method for assembling a rotor with permanent magnets, including the steps of introducing the magnets in 10 recesses of a non-ferromagnetic holder; combining the holder and the permanent magnets with a non-ferromagnetic support plate; attaching the permanent magnets to the support plate; and removing the holder and providing lamellae over the permanent magnets attached to the support plate. A holder and rotor obtained by the method are described.

Abstract: The invention relates to an electric machine (1) comprising: —a rotor (4) having 14 rotor poles (8) which is arranged rotatably about a central axis and—a stator (2) having 12 stator teeth (3) which project in a radial direction relative to the central axis from the stator (2) in the direction of the rotor (4), characterized in that each of the stator teeth (3) is surrounded by a stator coil (9) which surrounds only one of the stator teeth.

Abstract: A permanent-magnet switched-flux (PMSF) device has an outer rotor mounted to a shaft about a central axis extending axially through the PMSF device. First and second pluralities of permanent-magnets (PMs) are respectively mounted in first and second circles, radially outwardly in first and second transverse planes extending from first and second sections of the central axis adjacent to an inner surface of the outer rotor. An inner stator is coupled to the shaft and has i) a stator core having a core axis co-axial with the central axis; and ii) first and second pluralities of stator poles mounted in first and second circles, radially outwardly from the stator core axis in the first and second transverse planes. The first and second pluralities of PMs each include PMs of alternating polarity.

Abstract: This power generator is so formed that a number q of slots per pole per phase obtained by dividing the number of slots by the number of poles of permanent magnets and the number of phases of voltages is a fraction satisfying 1<q? 3/2.

Abstract: To develop a motor which can directly drive a brushless motor using a conventional circuit for an inverter without smoothing circuit and a circuit for a matrix converter that are for a brushed motor that operates on single-phase 100 V. Magnetic cores are attached to a motor shaft to increase inertial force. A magnetic-drive-pulsation motor which modulates torque is realized using force of attraction and repulsion generated by outer magnets and magnetic cores. The magnetic-drive-pulsation motor can be driven using the inverter and the matrix converter on single-phase 100 V power supply.