Patent application number | Description | Published |
20120267975 | EMBEDDED PERMANENT MAGNET ELECTRIC MOTOR - 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. | 10-25-2012 |
20140091663 | PERMANENT-MAGNET TYPE ROTATING ELECTRICAL MACHINE - Magnet insertion holes for embedding a plurality of permanent magnets per pole are formed in a rotor core in a protruding shape toward a center of a rotor. A pair of flux control holes formed in a symmetrical shape with respect to a center line between magnetic poles is provided for each magnetic pole in a magnetic pole gap of the rotor core. Where d is a diameter of the respective flux control holes, m is a center-to-center distance thereof, b is a width of the magnetic pole gap, and τ is a pole pitch between magnetic poles, the flux control holes are provided so that a value of m/T obtained by standardizing the center-to-center distance m by the pole pitch τ satisfies | 04-03-2014 |
20140346913 | LUNDELL ROTARY MACHINE - A rotor includes: a plurality of first magnetic pole members that are disposed such that first end portions and second end portions are respectively coupled magnetically and mechanically to a first magnetic end plate and to a second magnetic end plate and so as to be separated from a magnetic intermediate plate magnetically; a plurality of second magnetic pole members that are disposed such that intermediate portions are coupled magnetically and mechanically to the magnetic intermediate plate and so as to be separated from each of the magnetic end plates magnetically; a plurality of permanent magnets that are disposed between the first and second magnetic pole members in a circumferential direction; and a nonmagnetic holding body for separating the first magnetic pole members magnetically from the magnetic intermediate plate, and for separating the second magnetic pole members magnetically from the magnetic end plates. | 11-27-2014 |
20140354204 | CONTROL DEVICE AND CONTROL METHOD FOR PERMANENT MAGNET MOTOR - A control device for a permanent magnet motor, including: a rotor position detector configured to detect a rotating speed of a rotor of a permanent magnet motor in a state in which the permanent magnet motor is disconnected from a load by a clutch and rotates without power supply; a magnet temperature estimator configured to estimate a magnet temperature of the permanent magnet motor based on the detected rotating speed; a current compensator configured to determine a compensation amount for compensating for a current command to the permanent magnet motor based on the estimated magnet temperature; and a drive control device configured to control a power converter for driving the permanent magnet motor based on the compensation amount. | 12-04-2014 |
20150028727 | ROTARY ELECTRIC MACHINE - In a rotary electric machine, first inclined surfaces that intersect a plane that includes a central axis of a shaft at a predetermined angle are disposed radially outside gaps between coil ends of circumferentially adjacent concentrated winding coils, and cooling air that is blown out from a cooling fan and has flowed radially outward through the gaps between the coil ends is converted into an axially outward flow by the first inclined surfaces. | 01-29-2015 |
20150091407 | EMBEDDED PERMANENT MAGNET ROTARY ELECTRIC MACHINE - Permanent magnets that constitute the single magnetic poles are constituted by n permanent magnet segments, the n permanent magnet segments being configured such that shapes and directions of orientation thereof have mirror symmetry relative to a plane that passes through a magnetic pole center and that includes a central axis of the rotor core, and being oriented such that a permanent magnet segment that is further away from the magnetic pole center in a circumferential direction has a smaller angle of orientation, and the permanent magnet segment that is positioned further away from the magnetic pole center in the circumferential direction being produced so as to have an approximately fan-shaped cross-sectional shape in which a radial width is wider than a circumferential width. | 04-02-2015 |
20150130322 | STATOR FOR ROTATING ELECTRIC MACHINE AND METHOD FOR MANUFACTURING STATOR FOR ROTATING ELECTRIC MACHINE - A tooth of a stator has a tapered shape in which a tooth width decreases toward a distal end portion thereof. A winding is formed of an edgewise winding wound around the tooth in a row. The winding is supplied with power so that a terminal on a base portion side of the tooth may have a higher voltage than that of a terminal on the distal end portion side thereof. A tooth width T | 05-14-2015 |
20150162790 | ROTATING ELECTRIC MACHINE - A rotating electric machine includes a rotor including: a rotor core divided into blocks in an axial direction, the blocks being arranged to have a phase angle therebetween in a circumferential direction, the rotor core having magnet through holes arrayed in the circumferential direction and formed in an outer circumferential region; and permanent magnets inserted into the magnet through holes. The magnet through hole includes: a magnet insertion portion into which the permanent magnet is inserted; and a non-magnetic portion provided on an outer side of the magnet insertion portion in the circumferential direction. A bridge portion is formed between the outer circumferential surface and an outer circumferential inner wall of the non-magnetic portion. A bridge angle, which is an angle between both circumferential ends of the bridge portion with a rotation center of the rotor core set as a vertex, is larger than a skew angle. | 06-11-2015 |