| Patent application number | Description | Published |
|---|
| 20090001996 | SYSTEMS AND METHODS TO EVALUATE PERMANENT MAGNET MOTORS - Methods and systems for evaluating a permanent magnet motor are provided. The method includes the steps of spinning a rotor of the permanent magnet motor; determining a total harmonic distortion of the permanent magnet motor; and comparing the determined total harmonic distortion of the permanent magnet motor with a baseline total harmonic distortion. | 01-01-2009 |
| 20090058010 | APPARATUS AND METHOD FOR REDUCING STRAY RF SIGNAL NOISE IN AN ELECTRICALLY POWERED VEHICLE - RF signal noise in a powertrain utilizing a power inverter module and electric motor is attenuated by providing a low impedance connection between a transmission output shaft and housing. | 03-05-2009 |
| 20090115264 | Rotating electric machine apparatus and method of assembly - A rotating electric machine apparatus includes at least one end plate associated with an inner assembly unit that operates to prevent contact between the inner assembly unit and an outer assembly unit. The end plate is peripherally sized to allow the slidable assembly of the inner assembly unit into the outer assembly unit while preventing undesirable contact of the inner assembly unit with the outer assembly unit. | 05-07-2009 |
| 20090127942 | CONCENTRATED WINDING MACHINE WITH MAGNETIC SLOT WEDGES - Methods and apparatus are provided for improving operational characteristics of a concentrated winding machine. According to an example embodiment, an apparatus comprises stator teeth having distal ends, the stator teeth arranged in an annular fashion about an axis to define stator slots between adjacent teeth and slot openings between the distal ends of the adjacent teeth, the stator teeth structured to prevent relative movement between adjacent teeth. The apparatus further comprises magnetic wedges structured to be inserted between the distal ends of the adjacent teeth to close the slot openings. | 05-21-2009 |
| 20090140592 | METHODS AND APPARATUS FOR A PERMANENT MAGNET MACHINE WITH AN ADDED AIR BARRIER - An internal permanent magnet machine (“IPM machine”) of the type used, for example, with traction motors and hybrid electric vehicles, includes a rotor with an additional air barrier provided above the first magnet barrier in the same rotor slot. Each magnet only fills a portion of each cavity, thereby defining the air barriers. The added air barrier above the permanent magnet of the first layer acts as a barrier to the first layer magnet and lowers the magnet flux. | 06-04-2009 |
| 20090140593 | METHODS AND APPARATUS FOR A PERMANENT MAGNET MACHINE WITH ADDED ROTOR SLOTS - An internal permanent magnet machine (“IPM machine”) of the type used, for example, with traction motors and hybrid electric vehicles, includes a rotor with additional, small rotor slots configured to provide and averaging effect with respect to rotor barriers provided therein. | 06-04-2009 |
| 20090140596 | METHODS AND APPARATUS FOR A BAR-WOUND STATOR WITH PARALLEL CONNECTIONS - A bar-wound stator design with parallel connections is characterized by a shorter end turn length as compared to conventional stranded winding. The stator includes an inner winding set and an outer winding set provided within a plurality of slots, wherein the inner winding set is parallel to the outer winding set, and each winding set comprises multiple phases; and wherein the inner winding set and the outer winding set are staggered one slot within the plurality of slots. | 06-04-2009 |
| 20100102666 | METHODS AND APPARATUS FOR AN ELECTRIC MACHINE WITH A CAST ROTOR - A squirrel cage rotor structure used in connection with an electrical machine is formed from a high-strength, high-conductivity, and heat-treatable aluminum alloy, e.g., a T61 tempered aluminum alloy, such as A6101-T61. The resulting structure has improved strength compared to conventional pure aluminum structures, while at the same time limiting the reduction in electrical conductivity. | 04-29-2010 |
| 20100213781 | METHODS AND APPARATUS FOR A PERMANENT MAGNET MACHINE WITH ASYMMETRICAL ROTOR MAGNETS - In general, the various embodiments are directed to a permanent magnet machine (“PM machine”), and more specifically an internal permanent magnet machine (“IPM machine”) that includes rotor magnets configured asymmetrically with respect to the rotor periphery, thereby producing an averaging effect similar to that achieved through traditional skewing of the rotor magnets. In alternate embodiments, the span, placement and/or shape of the magnets may vary from one pole to the next. | 08-26-2010 |
| 20100247229 | END RING FOR A VEHICULAR ELECTRIC MACHINE - An end ring for a rotor assembly in a vehicular electric machine is provided, wherein the rotor assembly has a first end and is configured to rotate on a shaft. The end ring comprises an annulus circumscribing the shaft and engaging the end of the rotor assembly, and a sleeve coupled to the annulus and circumferentially coupled to the shaft. | 09-30-2010 |
| 20100253165 | PHASE LEAD CONNECTIONS FOR A BAR WOUND STATOR - A stator assembly includes a stator stack and a plurality of lead conductors extending from the stator stack. A plurality of conductor terminals are each connected to a respective one of the plurality of lead conductors. A plurality of wires are each connected to a respective one of the plurality of conductor terminals and a plurality of phase lead connection terminals are each connected to at least one of the plurality of wires. | 10-07-2010 |
| 20100253175 | ISOLATOR RING FOR AN ELECTRIC MOTOR - A stator assembly includes a stator stack and a plurality of conductors extending from the stator stack. An isolator/assembly ring is located on the stator stack. The isolator/assembly ring includes a plurality of inwardly protruding fingers. A method of assembling the stator assembly includes threading the plurality of conductors through the stator stack such that each of the plurality of fingers on the isolator/assembly ring is located between respective ones of the plurality of conductors. | 10-07-2010 |
| 20100266366 | FASTENER RETENTION SYSTEM - An apparatus includes structure defining a first hole that is characterized by an opening. A protuberance surrounds the opening and at least partially defines a concavity. A retention member is disposed within the concavity, and defines a second hole. The second hole has a first portion characterized by a first diameter and a second portion characterized by a second diameter. A threaded fastener has a flange characterized by a third diameter greater than the first diameter and less than the second diameter. The flange is disposed within the second portion of the second hole and between the first portion of the retention member hole and the first surface. Accordingly, the retention member retains the fastener in the concavity while permitting radial movement of the fastener. | 10-21-2010 |
| 20100277027 | SKEW PATTERN FOR A PERMANENT MAGNET ROTOR - A rotor for an electric machine includes a plurality of magnet stacks having at least five permanent magnets formed into a skew pattern within each of the magnet stacks. The skew pattern has a skew angle and at least two skew steps, and is an angle of rotation about the axis between individual magnets adjacent to the skew steps. The skew pattern may be an axially-symmetric V-shape. The plurality of magnet stacks may have five, six, or eight permanent magnets therein. The number of skew steps may be equal to two or three. The skew angle may be calculated as 360 degrees, divided by the number of skew steps plus one, multiplied by the least common multiple of the number of rotor poles and the number of the plurality of stator slots. | 11-04-2010 |
| 20100320864 | METHODS AND APPARATUS FOR A BAR-WOUND STATOR WITH ROTATED CONDUCTORS - A bar-wound stator includes a plurality of bar-type conductors disposed within the plurality of slots, wherein, within each slot, at least one of the bar-type conductors has an orientation that differs from the remaining bar-type conductors within that slot by a predetermined angle. For example, conductors with rectangular cross-sections can be inserted such that the conductors closest to the inner surface of the stator are rotated ninety degrees with respect to the remaining conductors. | 12-23-2010 |
| 20110037339 | CONCENTRATED WINDING MACHINES WITH REDUCED TORQUE RIPPLE AND METHODS FOR DESIGNING THE SAME - Systems and methods are provided for a motor having a concentrated winding construction with reduced torque ripple. A motor comprises a stator including a plurality of tooth segments disposed circumferentially to establish a hollow core and a rotor rotatably disposed inside the hollow core. The plurality of tooth segments define a plurality of slot openings associated with a plurality of slots. Each slot of the plurality of slots has a slot opening and at least one slot opening of the plurality of slot openings is asymmetric with respect to the plurality of slot openings. | 02-17-2011 |
| 20110050026 | INSULATION ASSEMBLY FOR A STATOR CORE - An assembly for providing electrical insulation in a stator core of a vehicular electric machine is provided. The stator core has a channel and the assembly comprises a first conductive element disposed through the channel, and a second conductive element disposed through the channel and substantially adjacent to the first conductive element. The assembly also comprises a first electrically insulating film having a first end residing between the first and second conductive elements. | 03-03-2011 |
