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| Number | Title | Issue Date |
| 8084910 | Rotor structure for a permanent-magnet machine The object of the invention is a rotor for a permanent-magnet synchronous machine in which a pole structure is fitted onto the surface of the rotor body structure facing the air gap. Each of the rotor's pole structures comprises at least one permanent magnet and a s... | 12/27/2011 |
| 7948134 | PM rotor having radial cooling slots and corresponding production method A permanent magnet (PM) rotor has a plurality of partial laminated stacks that are interspaced in the axial direction at a defined distance, thereby defining radial cooling slots. Permanent magnets are arranged in every partial laminated stack in inner pockets. The ... | 05/24/2011 |
| 7876011 | Method for encapsulating permanent magnets of a rotor of a generator and rotor of a generator A method is provided for encapsulating permanent magnets of a rotor of a generator. Magnets, which are shorter than a rotor yoke in an axial direction, are placed outside of the yoke leaving a short portion of the yoke free at both ends. Spacers of a non-magnetic ma... | 01/25/2011 |
| 7339298 | Compliant motor driven variable electrical device A motor driven electrical device includes: a variable electrical device having a rotational variable control; a first support plate positioned above the variable electrical device; a motor support plate pliably attached to the first support plate using a pliable sep... | 03/04/2008 |
| 7294947 | Apparatus for transferring torque magnetically An apparatus for transferring torque magnetically with a primary rotary member and a secondary rotary member. The primary rotary member has permanent magnets, the secondary rotary member with electro-conductive materials. The secondary rotary member also having magn... | 11/13/2007 |
| 7239057 | Single phase induction motor A single phase induction motor comprises: a stator installed at an inner circumferential surface of a motor body, the stator on which a plurality of coils are wound; a rotor rotatably installed at a center portion of the stator and provided with a rotation shaft at ... | 07/03/2007 |
| 7030530 | Permanent magnet element and electric machine A permanent magnet element intended especially for electrotechnical devices and an electric machine, the element (1) comprising at least one permanent magnet piece (10). The permanent magnet element (1) also comprises a protective cover (11 | 04/18/2006 |
| 6958555 | Method for producing an encased rotor of a permanent magnet The method serves for manufacturing a canned rotor of a permanent magnet motor. Firstly a shaft (2) provided with a rotor core [rotor laminated sheet package] (3) together with a pre-blank (11) forming the later magnet and a [sheet] metal casing... | 10/25/2005 |
| 6917132 | DC brush motor and permanent magnet used therein The challenge to be solved by the present invention is the miniaturization of a 1-300 W class of motor. This can be achieved by using a hollow-cylinder shaped anisotropic bonded magnet magnetized in a 4-pole configuration. The anisotropic bonded magnet has a maximum... | 07/12/2005 |
| 6897590 | Rotor assembly for a permanent magnet electrical machine comprising such a rotor assembly Rotor assembly for an electrical machine, including a body of generally cylindrical shape having an inner opening, wherein slots are provided in the body, the slots extending from the inner opening towards the outer periphery of the body; permanent magnets disposed ... | 05/24/2005 |
| 6891295 | Flywheel magneto generator A flywheel magneto generator which comprises a rotor having a magnet attached to an outer circumferential side of a flywheel and a stator constructed by winding a generating coil around a core having a magnetic pole portion opposed to a magnetic pole of the rotor, w... | 05/10/2005 |
| 6891297 | Electrical-steel-sheet formed body for rotor core, rotor, rotary electric machine and related method An electrical-steel-sheet formed body is provided with an opening portion into which a permanent magnet is inserted, and an outer-peripheral hardened portion formed on the electrical-steel-sheet formed body at an outer periphery side thereof for the opening portion ... | 05/10/2005 |
| 6822359 | Process for the production of a rotor, containing permanent magnets, of a synchronous machine, and rotor produced according to this process The rotor has a core with an internal space. Permanent magnets are arranged on the core. These permanent magnets are surrounded by an outer cylinder, which is connected flush to closure disks which bear stub shafts. Channels run out from the internal space in the ra... | 11/23/2004 |
| 6759775 | Permanent magnet actuating mechanism A permanent magnet motor comprises a frame and a plurality of energizable coils mounted on the frame and are substantially equally spaced from one another. A starting coil is mounted on the frame. A wheel is rotatably mounted on the frame. Carried on the wheel are a... | 07/06/2004 |
| 6711805 | Process for the production of a rotor, containing permanent magnets, of a synchronous machine, and rotor produced according to this process The rotor has a core with an internal space. Permanent magnets are arranged on the core. These permanent magnets are surrounded by an outer cylinder, which is connected flush to closure disks which bear stub shafts. Channels run out from the internal space in the ra... | 03/30/2004 |
| 6677692 | Rotor of small-sized motor A rotor (10) for a miniature electric motor includes a magnet (12) having a rotation axis (14) and a shaft (16) fixed concentrically to the magnet. The magnet (12) includes a through hole (20) extending coaxially with the rotation axis (14). The shaft (16... | 01/13/2004 |
| 6509664 | Hybrid synchronous machines comprising permanent magnets and excitation windings in cylindrical element slots A hybrid synchronous machine includes a cylindrical element having slots; excitation windings situated in at least some of the slots; and permanent magnets situated in at least some of the slots, the permanent magnets comprising radially magnetized perman... | 01/21/2003 |
| 6441522 | Electromagnetic apparatus employing high permeability low conductivity element A pole for use in a magnetic circuit includes a flux-passing portion for passing magnetic flux and a cap. The flux-passing portion has a face through which at least some of the magnetic flux passes and to which the cap is fixed. The cap is made of a perme... | 08/27/2002 |
| 6437473 | Electric motor rotor and a method for producing an electric motor rotor A method of producing the core of an electric motor by providing a stack of laminations of magnetic material. Windows are formed in the laminations for one or more magnetic elements to be placed in each window. Each window has an end edge portion (17) whi... | 08/20/2002 |
| 6369478 | Permanent-magnet-type electric rotating machine and air compressor and generator using the same In an ultra-permanent-magnet-type electric rotating machine including a stator in which a winding of armatures is wound in each of a plurality of slots of a stator core, and a rotor having permanent magnets respectively inserted into permanent-magnet-inse... | 04/09/2002 |
| 6147415 | Permanent magnetic generator A permanent magnetic dynamo comprises a wind gatherable stand having a tapered outer wall surface that extends from the lower end toward the upper end of the wind gatherable stand in order to guide wind upward; a roof supported through support shafts fixe... | 11/14/2000 |
| 6040644 | Shaft for a motor-driven spindle A shaft for a motor-driven spindle including an elongate section made of a reinforced plastic material and a rotor arranged around the elongate section and surrounded by reinforced plastic material. The rotor may be wound by the reinforced plastic materia... | 03/21/2000 |
| 6034465 | Pump driven by brushless motor A pump including a pump casing having an inlet and an outlet, and an impeller having a rotary axis and being rotatably mounted within the pump casing for rotation about the rotary axis is provided. The impeller is configured and positioned relative to the... | 03/07/2000 |
| 5962948 | Elevator motor with flat construction An elevator motor (2) employing permanent magnets (30) attached in a circle on the surface (36) of the rotor disc (12). The rotor disc (12) forms part of both the magnetic circuit and the supporting structure of the rotor (13). The permanent magnets (30) ... | 10/05/1999 |
| 5627423 | Permanent-magnet rotor for electric motors and method of manufacturing the same Permanent-magnet rotor for electric motors including at least two semitubular permanent magnets which are at least partially embedded in a core made of two-component epoxy resin or plastics. The core is obtained in a mold by molding in place or pouring ov... | 05/06/1997 |
| 5596238 | Magnet attachment assembly for a magnetic clutch The invention relates to a retaining means for magnets of magnetic clutch for pump drives and has an outer rotor receiving magnets on its inner side and an inner rotor receiving magnets on its outer side, the magnets being disposed evenly around the perip... | 01/21/1997 |
| 5488260 | Encapsulated magnets in a permanent magnet rotor In a permanent magnet rotor, the circumferential gaps between circumferentially spaced sintered or cast magnets are filled by a plastic or resin material which also coats the outer circumferential surface of the magnets to secure the magnets to the rotor ... | 01/30/1996 |
| 5200662 | Joint structure of radial type rotor and output shaft in synchronous motor The present invention relates to a joint structure of a rotor (12) and an output shaft (10) in a synchronous motor, the rotor having an alternate circumferential arrangement of rotor cores (16) and magnets (14). A molding resin (24) is filled and hardened... | 04/06/1993 |
| 4973872 | Dynamoelectric machine rotor assembly with improved magnet retention stucture A shaft-mounted rotor assembly for an electric motor and method of manufacturing the same wherein arcuate permanent magnets are positioned in angularly related adjacent positions to surround the outer periphery of a shaft-mountable rotor core, and a plast... | 11/27/1990 |
| 4845837 | Method of making permanent magnet assembly A rotor assembly for a permanent magnet motor includes a set of laminatings forming a rotor body, each lamination having a first magnet slot therein. A generally rectangular permanent magnet is disposed in the magnet slot, the magnet slot of each laminati... | 07/11/1989 |
| 4835840 | Method of making an improved disc rotor assembly A disc rotor assembly includes a ring of magnetic flux conducting material having a ring-shaped magnetizable body fastened thereon. The magnetizable body includes a flat, axially facing, ring-shaped rotor surface for opposing a stator in an electric motor... | 06/06/1989 |
| 4757603 | Method of making a reinforced rotor assembly A rotor assembly particularly suited for use in oscillating electric motors includes magnet assemblies mounted on stiffening rings. The stiffening rings and magnet assemblies are bonded together by an intermediately disposed matrix. Each stiffening ring i... | 07/19/1988 |
| 4704555 | Improved disc rotor assembly A disc rotor assembly includes a ring of magnetic flux conducting material having a ring-shaped magnetizable body fastened thereon. The magnetizable body includes a flat, axially facing, ring-shaped rotor surface for opposing a stator in an electric motor... | 11/03/1987 |
| 4700091 | Bipolar stepping motor rotor with drive pinion and method of manufacture A wristwatch movement has a Lavet stepping motor directly driving a toothed center wheel by means of a drive pinion which is an integral part of the stepping motor rotor. The rotor comprises a bipolar permanent magnet member and a plastic rotor body molde... | 10/13/1987 |
| 4625392 | Method of manufacturing a molded rotatable assembly for dynamoelectric machines A method of making a rotor for a dynamoelectric machine comprises the steps of forming a plurality of flux ring segments of flux conducting material. Segments of magnetizable material are then secured to each of the flux ring segments to form a ring-segme... | 12/02/1986 |
| 4504755 | Rotor reluctance notch for cogging control In an electric motor of the type having a permanent magnet rotor which is subject to cogging torque, a plurality of skewed reluctance notches are cut in the outer diameter of the rotor laminations. The rotor laminations have first and second sets of axial... | 03/12/1985 |
| 4241620 | Balance wheel The invention relates to a balance wheel for rotating machines, especially combustion engines, including, for example, outboard motors. Hitherto, such balance wheels or flywheels have been manufactured from different non-ferrous metals as zinc or aluminum... | 12/30/1980 |
| 4227105 | Annular magnet assembly An annular magnet assembly for a dynamoelectric machine includes a plurality of arcuate permanent magnets disposed in an annular array and a frame member of a non-magnetic material for rigidly connecting the magnets together. The magnets are disposed in e... | 10/07/1980 |
| 4012651 | Permanent magnet field means for dynamo-electric machines A permanent magnet field means for use in a dynamoelectric machine comprises a magnet ring received in a supporting ring of ferromagnetic material. The magnet ring includes a circular array of arcuate magnets and a carrier of non-magnetic material in whic... | 03/15/1977 |
