Pole Shoe Shape Patents (Class 310/154.38)
  • Patent number: 9735634
    Abstract: A rotor for a permanent magnet synchronous machine that includes a rotor core structure. A first set of permanent magnets forms poles within the rotor core structure. Each pole includes a pair of permanent magnets from the first set of permanent magnets. A first set of apertures is formed in a first radial layer of the rotor core structure. Each pole includes a pair of apertures from the first set of apertures. The first set of permanent magnets is inserted within the first set of apertures. Each pair of permanent magnets within a pole cooperatively generates a magnetic field in a same direction within the pole. The magnetic field generated by a respective pair of magnets in a respective pole is opposite to a magnetic field generated by a pair of permanent magnets in an adjacent pole.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: August 15, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Lei Hao, Thomas W. Nehl, Chandra S. Namuduri, Michael G. Reynolds, Alexandru Rajala
  • Patent number: 9401631
    Abstract: The brushless DC motor of the present invention comprises a permanent magnet rotor rotating coaxially with and inside of the stator containing the electric windings, separated by a radial, axially extending gap. The rotor can be formed of four or more permanent, e.g., ferrite ceramic magnets, spaced substantially equidistantly circumferentially around the rotor and extending radially along the axial length of the rotor. The preferred ferrite magnets are substantially corrosion resistant, and thus durable in the wet rotor environment, in which it may be used, sufficient to withstand the effects of even hot salt water. Preferably, four of the permanent magnets are bar magnets, i.e., rectangular in cross-section, extending radially and perpendicularly to the adjacent magnets. Most preferably, the bar magnets are separated by generally wedge-shaped, or quadrant-shaped, sections of magnetic material.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 26, 2016
    Assignee: TACO, INC.
    Inventors: Di Wu, Vladislav Milchev Stakev, Robert F. Birkenstock, Jr.
  • Patent number: 8283832
    Abstract: A method, apparatus, article of manufacture and system for producing a field pole member for electrodynamic machinery are disclosed to, among other things, reduce magnetic flux path lengths and to eliminate back-iron for increasing torque and/or efficiency per unit size (or unit weight) and for reducing manufacturing costs. For example, a field pole member structure can either reduce the length of magnetic flux paths or substantially straighten those paths through the field pole members, or both. In one embodiment, a method provides for the construction of field pole members for electrodynamic machines.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: October 9, 2012
    Assignee: NovaTorque, Inc.
    Inventors: John Patrick Petro, Ken George Wasson, Jeremy Franz Mayer
  • Patent number: 8076815
    Abstract: Electrical machines having pole teeth which can be equipped with a permanent magnet are intended to be capable of being assembled more easily. Provision is made for this purpose for two pole tooth halves (1,2) to be provided for each pole tooth, each of which two pole tooth halves has two opposing end sides. At least one end-side plate (3), which connects in each case one end side of the two pole tooth halves (1,2) to one another, is used for forming a pocket (5) between the two pole tooth halves (1,2), into which pocket a permanent magnet can be inserted. A space for the permanent magnet can therefore be kept free during assembly of the pole tooth or during winding thereof. Since the permanent magnet only needs to be inserted into the pocket (5) relatively late, the entire assembly process can be simplified.
    Type: Grant
    Filed: February 19, 2007
    Date of Patent: December 13, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Mark Freudenberg, Markus Jakobi, Josef Maidl, Michael Menhart
  • Patent number: 6847143
    Abstract: A rotary electrical machine, especially an alternator or an alternator-starter for a motor vehicle, comprises a stator (S), a rotor (R) and permanent magnets incorporated in the rotor and/or the stator, in which the said magnets are formed into at least two groups each of which is defined by a specific type of composition, with each sub-assembly being a combination of a magnet containing rare earths with a ferrite magnet, at least one of the magnets being arranged radially so as to generate an orthoradial magnetic flux.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: January 25, 2005
    Assignee: Valeo Equipements Electriques Moteur
    Inventor: Dokou Antoine Akemakou