Abstract: A linear motor achieves both a decrease in pulsation and an increase in propulsion with a 6n teeth structure provided with: a first mover for holding permanent magnets arranged longitudinally; a first stator having 6n teeth that are arranged so as to oppose the first mover and 6n windings that are wound on the respective teeth; a second mover holding permanent magnets longitudinally; a second stator having 6n teeth that are arranged in the longitudinal direction so as to oppose the second mover and 6n windings that are wound on the respective teeth The permanent magnets opposing each other in the first mover and the second mover are disposed with a phase difference of ?/2 in the moving direction of the two movers, and electrical currents with a phase difference of (1+6m)?/3 or (2+6m)?/3 are supplied to the windings opposing each other in the first stator and the second stator.

Abstract: A rotary electric machine includes a stator including a coil, and a rotor in an inner peripheral side of the stator. The rotor core comprises a soft magnetic metal and a magnet within a magnet insertion hole, a first magnet stopper on a q axis side of the magnet in the magnet insertion hole, a magnet accommodation between the first magnet stopper on both sides of the magnet insertion hole, a first space portion communicating with the magnet insertion hole, a second space portion whose distance from the magnet is equal to or less than a thickness of the magnet and a radial length of a magnetic pole center is long, the second space portion formed on an inner peripheral side relative to the magnet, and a third space portion that has a convex shape on an inner peripheral side of a q axis of the magnet.

Abstract: A linear motor achieves both a decrease in pulsation and an increase in propulsion with a 6n teeth structure provided with: a first mover for holding permanent magnets arranged longitudinally; a first stator having 6n teeth that are arranged so as to oppose the first mover and 6n windings that are wound on the respective teeth; a second mover holding permanent magnets longitudinally; a second stator having 6n teeth that are arranged in the longitudinal direction so as to oppose the second mover and 6n windings that are wound on the respective teeth The permanent magnets opposing each other in the first mover and the second mover are disposed with a phase difference of ?/2 in the moving direction of the two movers, and electrical currents with a phase difference of (1+6m) ?/3 or (2+6m) ?/3 are supplied to the windings opposing each other in the first stator and the second stator.

Abstract: To provide a linear motor and device which suppress contact of a movable element with a core. The linear motor includes: a movable element having a permanent magnet; and an armature having magnetic pole teeth located in an up/down direction of the movable element, a winding wound around the magnetic pole teeth, and an arm part extending in a right/left direction of the movable element. The movable element and the armature make relative movement in a front/back direction. The linear motor includes a protective member which is located between the arm part and the movable element and in which a movable element facing surface facing the movable element is located inside an outer end of the winding.

Abstract: To provide a linear motor and device which suppress contact of a movable element with a core. The linear motor includes: a movable element having a permanent magnet; and an armature having magnetic pole teeth located in an up/down direction of the movable element, a winding wound around the magnetic pole teeth, and an arm part extending in a right/left direction of the movable element. The movable element and the armature make relative movement in a front/back direction. The linear motor includes a protective member which is located between the arm part and the movable element and in which a movable element facing surface facing the movable element is located inside an outer end of the winding.

Abstract: A small and low-price rotating electric machine has a structure where a magnet end surface and a metal tube end are not in contact with each other. The rotating electric machine has a cylindrical stator core, a rotor having a shaft provided on the inner circumferential side of the stator core, a yoke fixed to the shaft, at least one ferrite magnet provided on the outer circumferential surface of the yoke, and a protective cover provided on the outer circumference of the ferrite magnet. The ferrite magnet end surface is projected with respect to an end surface of the yoke, and has a step portion to form a gap between the end surface of the ferrite magnet and a bottom surface of the protective cover.

Abstract: The present invention is intended to provide a magnetic gear structure that realizes a magnetic gear that transmits a torque efficiently by reducing eddy currents generated in the interior of magnets. In order to solve the subject described above, in the magnetic gear structure, a structure in which magnets are arranged in the interior of an iron core in an inner rotor portion. Bonded magnets formed by molding, for example, NdFeB powder may be used as the magnets. Since the influence of the eddy current on the side of an outer rotor having a larger pole number is large, a structure in which the magnets are arranged in the interior only of an outer rotor portion having a larger pole number is also applicable. In addition, the magnets to be embedded may be divided into a plurality of pieces. The finer the division of the magnets, the less eddy currents are generated, so that a method of further fining down and assembling the same is also effective.

Abstract: A small and low-price rotating electric machine has a structure where a magnet end surface and a metal tube end are not in contact with each other. The rotating electric machine has a cylindrical stator core, a rotor having a shaft provided on the inner circumferential side of the stator core, a yoke fixed to the shaft, at least one ferrite magnet provided on the outer circumferential surface of the yoke, and a protective cover provided on the outer circumference of the ferrite magnet. The ferrite magnet end surface is projected with respect to an end surface of the yoke, and has a step portion to form a gap between the end surface of the ferrite magnet and a bottom surface of the protective cover.

Abstract: The present invention relates to a magnetic gear type electric rotating machine. Specifically, the purpose is to provide a magnetic gear type electric rotating machine with which the intensity of a permanent magnetic field can be improved without increasing material and manufacturing costs, and deterioration of torque transmission characteristics can be prevented. To this end, in the present invention, concave and convex sections are provided on a surface of at least one of cores (12, 22) for a first permanent magnetic field (1) and a second permanent magnetic field (2). The convex sections (13) are arranged along the circumferential direction at the center sections of permanent magnetic poles (11a, 11b), and the concave sections (14) are arranged along the circumferential direction at the edge sections of the permanent magnetic poles (11a, 11b).

Abstract: A magnetic gear mechanism including a simplified assembly of a magnetic flux modulating section in the magnetic gear mechanism which improves the strength thereof. In the magnetic flux modulating section of the magnetic gear mechanism, the magnetic flux modulating section being formed of a magnetic member and a non-magnetic member, a piece of the magnetic member and a piece of the non-magnetic member are separately produced. The piece of the magnetic member is sandwiched between circumferential projections provided in pieces of the non-magnetic member, and the magnetic member and the non-magnetic member and bearing holding sections form a structure in which the magnetic member and the non-magnetic member are fitted into the bearing holding sections by using recessed portions provided in the bearing holding sections and axial projections provided in the pieces of the non-magnetic member. This structure simplifies production and improves strength.

Abstract: The present invention relates to an AC motor control device and, particularly, to provide an AC control device capable of simply setting a state quantity of an AC motor non-linearly variable, in accordance with the motor driving state and using the setting in motor control, the present invention can be achieved by including a state quantity calculating unit (13, 13a, 13b, 13c) for calculating a state quantity corresponding to a coil interlinkage flux which is an internal quantity of the motor, calculating a setting value of the coil interlinkage flux defined on one axis out of two axes, that is, d and q axes, with a function formula using a current defined on the same one of the axes and a function formula using a state variable defined on the other one of the axes.

Abstract: The present invention relates to a magnetic gear-type electric rotating machine. Specifically, an object is to provide a magnetic gear-type electric rotating machine with which an intensity of a permanent magnet field system can be improved and a decrease of torque transmission characteristics can be prevented without increasing material and manufacturing costs. To this end, in the present invention, a recess and a projection are provided on a surface of at least one of cores 12, 22 of a first permanent magnet field system 1 and a second permanent magnet field system 2. A projection portion 13 is disposed at a central part in a circumferential direction of permanent magnet magnetic poles 11a, 11b, and a recess portion 14 is disposed at an edge in the circumferential direction of the permanent magnet magnetic poles 11a, 11b.

Abstract: In an electrical actuator, the number of piece of an inverter is made one in order to miniaturize a control circuit suitable to a mechanically and electrically integrate type, a motor is configured to include two independent three-phase windings thereinside, and motor relays are disposed at neutral points of the independent three-phase windings.

Abstract: A permanent magnet rotating electrical machine is configured to include a stator that includes a stator core and a winding wound around a teeth portion of the stator core, a rotor rotatably arranged with respect to the stator with a gap, and in which a rotor core and a plurality of permanent magnets having different poles are alternately arranged in a circumferential direction, and a groove provided in a surface of the rotor core, the surface facing the stator, in a manner symmetric about a center line of the permanent magnet in the circumferential direction.

Abstract: Provided is an AC motor in a three-phase unbalanced state such as a claw-teeth type AC motor (108), which is reduced in magnetic flux pulsations and torque pulsations. Among the current command values of individual phases to be intrinsically given to an inverter (106) for feeding three-phase alternating currents of variable voltages/frequencies to the electric motor, a current command of an intermediate phase (a V-phase) having a smaller magnetic resistance of a stator core than those of other phases is subjected to a reducing correction by a correction unit (102) on the basis of the correction amount calculated by a current correction amount calculating unit (103), and the unbalanced three-phase alternating currents are fed to the AC motor (108), so that magnetic flux pulsations of a secondary electric angle and torque pulsations of the same order are reduced.

Abstract: Inner rings of bearings arranged at both ends of a rotor shaft are fixed to the rotor shaft, and outer rings of both of the bearings are arranged at bearing holding parts movably in an axial direction of the rotor. A preload imparting member is attached to one of the bearings, the preload imparting member being configured to bias the rotor shaft in one direction and to apply a biasing force to make a housing and a flange, which constitute a chassis, come close to each other.

Abstract: The present invention is intended to provide a magnetic gear structure that realizes a magnetic gear that transmits a torque efficiently by reducing eddy currents generated in the interior of magnets. In order to solve the subject described above, in the magnetic gear structure, a structure in which magnets are arranged in the interior of an iron core in an inner rotor portion. Bonded magnets formed by molding, for example, NdFeB powder may be used as the magnets. Since the influence of the eddy current on the side of an outer rotor having a larger pole number is large, a structure in which the magnets are arranged in the interior only of an outer rotor portion having a larger pole number is also applicable. In addition, the magnets to be embedded may be divided into a plurality of pieces. The finer the division of the magnets, the less eddy currents are generated, so that a method of further fining down and assembling the same is also effective.

Abstract: A magnetic gear comprises a first permanent magnet field having a plurality of permanent magnet magnetic poles, a second permanent magnet field having a plurality of permanent magnet magnetic poles, number of poles of which magnet is different from that of the first permanent magnet field, and a modulating magnetic pole arranged between the first permanent magnet field and the second permanent magnet field and having a plurality of pole pieces to modulate the number of poles of the first and second permanent magnet fields. Non-magnetic bars are provided between the plurality of pole pieces. One ends of the non-magnetic bars are fixed to a first non-magnetic end holding member and the other ends of the non-magnetic bars are electrically insulated from and fixed to a second non-magnetic end holding member.

Abstract: An in-vehicle motor includes a busbar for connecting plural concentrated-winding stator coils. The busbar includes: an arm extending perpendicular to a longitudinal direction of the busbar; a coil holder provided at a tip of the arm; and a mechanically-twisted portion provided on the arm.

Abstract: There is disclosed a rotary electromotor including a stator, a stator winding on the stator, a stator frame, a rotator, end covers, and a highly heat-conductive member. The stator has a plurality of magnetic poles. The stator frame supports the stator. The rotator is supported by the stator with a gap therefrom such that the rotator is rotatable. The end covers close opposite ends of the stator frame. The highly heat-conductive member is fixed by a resin material in a space defined inside the stator, the stator frame, and the end covers.