Patent application number | Description | Published |
20090102304 | ROTOR OF ROTATING ELECTRICAL MACHINE AND MANUFACTURING METHOD THERE FOR - A rotor of a rotating electrical machine is provided in which neither deterioration nor fluctuation in the cogging torque is caused and that causes neither physical enlargement nor cost increase. The rotor of a rotating electrical machine, provided with a plurality of magnetic poles | 04-23-2009 |
20090195104 | PERMANENT MAGNET SYNCHRONOUS MOTOR - To obtain a permanent magnet synchronous motor suitable for an electric power steering system, in which the magnet thickness (magnet used amount) can be reduced while securing demagnetization resistance and torque characteristics. In a permanent magnet synchronous motor including a rotor in which plural permanent magnets are arranged at an outer periphery of a rotor core, which is supported so as to rotate freely, and a stator provided at the outside of the stator and having stator windings | 08-06-2009 |
20100244605 | PERMANENT MAGNET TYPE ROTATING ELECTRICAL MACHINE AND ELECTRIC POWER STEERING DEVICE - A permanent magnet type rotating electric machine includes: a rotor including a rotor core having a polygonal shape and a plurality of permanent magnets; and a stator including a stator core and armature windings, in which, when the number of poles is M, the number of slots is N, M permanent magnets are sequentially numbered from first to M-th in a circumferential direction, and a positional shift amount in the circumferential direction from a corresponding one of equiangularly arranged reference positions, each being at the same radial distance from a center of a rotating shaft, for an i-th (i=1, 2, . . . , M) permanent magnet is h | 09-30-2010 |
20100244607 | ROTOR OF ROTARY ELECTRIC MACHINE AND METHOD OF MANUFACTURING THE SAME - In a rotor of a permanent magnet rotary electric machine, a bonding portion between each of segment shaped magnets and an outer circumference face of a rotor core is provided in axial symmetry with respect to the rotor axial center and has a bonding area equal to or larger than a half of a contact area between each of the segment shaped magnets and the outer circumference face of the rotor core; and a biasing force is applied to an outer circumference face of the segment shaped magnets by a ring. | 09-30-2010 |
20110278995 | MOTOR FOR AN ELECTRIC POWER STEERING APPARATUS - Provided is a motor for an electric power steering apparatus, in which vibrations and noises are suppressed. The motor for an electric power steering apparatus includes: a motor section ( | 11-17-2011 |
20120313474 | ROTOR OF ROTARY ELECTRIC MACHINE - A rotor of a rotary electric machine according to the present invention includes: a rotor core arranged on the outer circumferential side of a rotor shaft; and a plurality of magnetic poles fixed to the rotor core and circumferentially arranged on the rotor core, the rotor including a non-magnetic ring attached by insertion to the outer circumference of the plurality of the magnetic poles and having a substantially polygonal shape in outer circumferential shape. The non-magnetic ring is configured such that the inner circumferential length L of the non-magnetic ring before assembly with respect to the length of an envelope L | 12-13-2012 |
20130043749 | ROTARY ELECTRIC MACHINE AND METHOD OF MANUFACTURING THE SAME - In a rotary electric machine including a stator and a rotor, the stator includes: a connected core ( | 02-21-2013 |
20130140964 | MOTOR FOR ELECTRIC POWER STEERING DEVICE - A motor for an electric power steering device, includes: a housing side bearing which is placed on the output side of a shaft of a rotor placed in a frame, and is supported by a housing connected to the frame; and a frame side bearing which is placed on the opposite output side of the shaft of the rotor, and is composed of an outer ring and an inner ring supported by the frame. The motor is controlled by an electronic control unit which is coaxially placed with the rotor, the motor including: a bearing box which supports the frame side bearing, and is formed with a closed end section between the closed end section and the side of the frame side bearing; an axial elastic body which is placed on the closed end section of the bearing box, and applies a preload in an axial direction to the outer ring of the frame side bearing; and a radial elastic body which is placed on the outer circumferential side of the outer ring of the frame side bearing, and applies a preload in a direction perpendicular to the axial direction. | 06-06-2013 |
20130154436 | PERMANENT MAGNET TYPE ROTARY ELECTRIC MACHINE AND ELECTRIC POWER STEERING APPARATUS USING THE SAME - Not less than two regions different in magnetic circuit design are provided in a rotational axis direction of the rotor ( | 06-20-2013 |
20140009023 | PERMANENT MAGNET MOTOR - A permanent magnet motor ( | 01-09-2014 |
20140265699 | ROTOR FOR ROTARY ELECTRIC MACHINE AND MOTOR FOR ELECTRIC POWER STEERING - The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft09-18-2014 | |