Patent application number | Description | Published |
20090015090 | PERMANENT MAGNET ROTATING ELECTRICAL MACHINE AND PERMANENT MAGNET ROTATING ELECTRICAL MACHINE SYSTEM - Movement of magnets due to centrifugal force is restricted. In a permanent magnet rotating electrical machine | 01-15-2009 |
20090322175 | PERMANENT-MAGNET TYPE ELECTRIC ROTATING MACHINE AND PERMANENT-MAGNET TYPE ELECTRIC ROTATING MACHINE SYSTEM FOR AUTOMOBILE OR TRAIN - A rotor is deployed such that the rotor becomes coaxially rotatable with a stator. A shaft is fixed onto the axis of a rotor iron-core. 1-pole constituting magnet slots are deployed into V-character pattern along an outer circumference portion of the rotor iron-core. Permanent magnets are embedded into the magnet slots. For the 1 pole, the 2 pieces of same-polarity permanent magnets are embedded into the V-character pattern. The configuration of each embedded permanent magnet is designed as follows: From the thickness of the permanent-magnet edge portion on the inner-diameter side of the rotor iron-core, which becomes the center of the V-character pattern, the thickness of the permanent magnet gradually increases toward the outer-diameter side of the rotor iron-core, which become the right and left edge portions of the V-character pattern. Simultaneously, curved lines are provided on both edge portions of the permanent magnet. | 12-31-2009 |
20100176682 | PERMANENT MAGNET TYPE ROTARY ELECTRIC MACHINE - A permanent magnet type rotary electric machine has a rotor having a rotor core and permanent magnets buried into the rotor core by being incorporated into respective permanent magnet slots. The permanent magnet slot per one pole is divided at least into four slots along an outer circumferential direction in the rotor core, and in respective rest core-portions between adjacent divided permanent magnet slots in the rotor core, a width of a first rest core-portion at the middle of each pole and a width of a second rest core-portion between adjacent poles of different polarities are formed larger than that of the others. | 07-15-2010 |
20110163624 | PERMANENT MAGNET TYPE ROTARY ELECTRIC MACHINE - A rotary electric machine, wherein the rotation direction of a rotor is a defined direction, a groove is provided in a rotor core on the radial outside with respect to permanent magnets, and the groove is provided in a position inclined from the centerline between the permanent magnets within a magnetic pole head and at the same time in a position excluding an end portion of a permanent magnet insertion hole on the radial outside, in order to enable a reduction in a no-load induced electromotive force and prevention of a decrease in output. | 07-07-2011 |
20120032539 | Permanent Magnet Rotating Machine - A permanent magnet rotating machine has a stator, in which armature windings are formed in a plurality of slots formed in a stator iron core, and also has a rotor, in which two magnet insertion slots are formed for each pole in a rotor iron core in a V shape when viewed from the outer circumference of the rotor and one permanent magnet is embedded in each magnet insertion slot with polarity alternating for each pole; a wall at one end of the magnet insertion slot on the external diameter side of the rotor is formed with three arcs having different curvatures, one of the three arcs being parallel to the outer circumference of the rotor, and a wall at the other end of the magnet insertion slot on the internal diameter side of the rotor is formed in an arc shape. | 02-09-2012 |
20120146336 | PERMANENT MAGNET ROTATING ELECTRICAL MACHINE AND METHOD FOR MANUFACTURING A ROTOR OF THE SAME - A permanent magnet rotating electrical machine comprises a stator with a stator coil applied in a plurality of slots provided in a stator core, a rotor disposed opposite to the stator with a predetermined gap interposed therebetween, the rotor including a permanent magnet embedded in each of magnet-insertion holes provided in a rotor core of the rotor while polarity of the permanent magnet being varied on a pole-by-pole basis, and end plates disposed at ends of the rotor core, in the axial direction thereof, respectively, in which one end plate of the end plates disposed at the ends of the rotor core, in the axial direction thereof, respectively, is also provided with magnet-insertion holes, and each of the magnet-insertion holes provided in the one endplate is filled up with a non-magnetic material, thereby stopping up each of the magnet-insertion holes provided in the end plate. | 06-14-2012 |
20120146567 | Rotator Control Device, Rotator System, Vehicle, Electric Car and Electric Generation System - To prevent demagnetization of a permanent magnet synchronous rotating machine, a rotating machine control device according to the present invention is a rotating machine control device comprising: a power converter having a switch part on each of a positive side and a negative side for each phase; and short circuit detection unit for detecting a short circuit of the switch part, wherein a command to turn on positive-side switches and negative-side switches of a plurality of phases of the switch part is issued in the case where the short circuit detection unit detects the short circuit. | 06-14-2012 |
20120228990 | Permanent Magnet Type Electrical Rotating Machine and Permanent Magnet Type Electrical Rotating Machine System for Vehicle - Provided is a permanent magnet type electrical rotating machine which realizes a rotor retaining structure for securely preventing the rotor before being coupled to a prime mover from moving in any of not only the axial and radial but also rotational (circumferential) directions, even in a case where it is a large capacity (with a large magnetic attractive force) permanent magnet type electrical rotating machine having an overhung rotor support structure. | 09-13-2012 |
20140028146 | Induction Motor and Railway Vehicle Using Induction Motor - An induction motor includes: a stator and a rotor arranged so as to face the stator via a void, the rotor including conductor bars in a plurality of slots formed by a plurality of teeth arranged so as to extend in the circumferential direction of a rotatably held rotor core, wherein the circumferential width of distal end portions of the slots on the radially outside of the rotor core are narrowed by distal end portion of the teeth on the radially outside of the rotor core, and the teeth are each formed with a projection protruding in an arcuate shape from the distal end of the tooth on the radially outside of the rotor core toward the conductor bar in each of the slots. | 01-30-2014 |