Patent application number | Description | Published |
20090188763 | Magnetorheological fluid-based device having a magnetorheological piston assembly - A magnetorheological (MR) fluid-based device including an MR piston assembly. The MR piston assembly includes a ferromagnetic MR piston core and an electric coil. The MR piston core has a central longitudinal axis and has an outer circumferential surface substantially coaxially aligned with the central longitudinal axis. The electric coil is positioned in the MR piston core and is substantially coaxially aligned with the central longitudinal axis. A portion, or at least a portion, of the electric coil is buried in the MR piston core under the outer circumferential surface. | 07-30-2009 |
20090309584 | Rotary velocity sensor and rotary position and velocity sensor - A rotary velocity sensor includes a stator having a coil and a rotor having a permanent magnet. The rotor is substantially coaxially aligned with the central longitudinal axis of the stator, surrounds the coil, and is rotatable with respect to the stator about the axis. A rotary position and velocity sensor includes a non-magnetic stator having a magnetosensitive device and having at least one coil and includes a non-magnetic rotor having at least one permanent magnet. The magnetosensitive device has a sensing surface with a normal axis aligned substantially perpendicular to the stator axis. The at-least-one coil has a central coil axis aligned substantially perpendicular to the stator axis. The rotor is substantially coaxially aligned with the central longitudinal axis of the stator, surrounds the at-least-one coil, and is rotatable with respect to the stator about the stator axis. | 12-17-2009 |
20100089711 | Magnetorheological devices with permanent magnet field bias - A magneto-rheological damping device comprises a piston and a case element, both capable of acting to carry a magnetic flux. A passage exists between the piston and the case element, and an amount of MR fluid is positioned between the piston and the case element to flow within the passage. | 04-15-2010 |
20130279060 | METHOD AND SYSTEM FOR SPATIALLY MODULATING MAGNETIC FIELDS USING CONTROLLABLE ELECTROMAGNETS - A method, device and system for spatially modulating magnetic fields using controllable electromagnets arranged into array configurations. An external controller modulates electromagnets and magnetic arrays by varying strength and polarity of electromagnets. Arrays are non-permanently latched and unlatched by controlling magnetic field patterns, without altering the properties of the magnetic elements, other than by electronic control signals. Arrays may contain combinations of electromagnets and permanent magnets. | 10-24-2013 |
20130320796 | BI-PERMANENT MAGNETS IN SYNCHRONOUS MACHINES - A rotor for an interior permanent synchronous machine. A rotor core structure includes an outer cylindrical wall juxtaposed to an air gap. A plurality of arcuately-shaped cavities is formed within the rotor core structure. The plurality of arcuately-shaped cavities is substantially concentrically layered with respect to an outer cylindrical wall of the rotor core structure. Each arcuately-shaped cavity extending between first and second end sections is juxtaposed to the outer cylindrical surface wall of the rotor structure and includes an intervening center section. A plurality of permanent magnets is inserted within the plurality of arcuately-shaped cavities. Each first end section retains a respective first permanent magnet having a first magnet field strength. Each second end section retains a respective second permanent magnet having the first magnetic field strength. Each center section retains a respective third permanent magnet having a second magnet field strength less than the first magnetic field strength. | 12-05-2013 |
20130320797 | MAGNETIC BARRIER FOR MINIMIZING DEMAGNETIZATION IN BI-PERMANENT MAGNET SYNCHRONOUS MACHINES - A rotor for a permanent synchronous machine includes a rotor having a plurality of arcuately-shaped cavities formed within a rotor core structure. The plurality of arcuately-shaped cavities substantially concentrically layered with respect to an outer cylindrical wall of the rotor core structure. A plurality of permanent magnets is inserted within the plurality of arcuately-shaped cavities. Each cavity layer retains a permanent magnet of a first magnetic field strength disposed in end sections and a permanent magnet of a second magnetic field strength in a center section of each cavity layer. Each respective cavity includes an air barrier formed between the magnets having different magnetic field strengths. The air barrier generates a reluctance within an air barrier gap for directing a flow of flux generated by each third permanent magnet in a preceding layer in a direction toward each third permanent magnet in a succeeding layer. | 12-05-2013 |
20140076676 | MAGNETO-RHEOLOGICAL DAMPING ASSEMBLY - A magneto-rheological damping assembly including a piston ( | 03-20-2014 |
20140232500 | OBJECT RETENTION ON INTERIOR VEHICULAR COMPONENTS UTILIZING CODED MAGNETS - A method of and attachment system for securing and manipulating attractive objects upon an interior vehicular surface, utilizing at least one coded magnet to selectively attach/retain the objects, and provide various other functions, including aiding in alignment, orientation, and retrieval of the objects, and activating an associated sub-system. | 08-21-2014 |
20140319957 | LOW TORQUE RIPPLE ELECTRIC DRIVE SYSTEM FOR BAS APPLICATION - A BAS machine that includes a specific combination of the number of stator slots to the number of rotor bars to reduce torque ripple without the need for skewing the rotor bars. Particularly, the ratio of the number of stator slots to the number of rotor bars is selected to prevent first and second order harmonics between the stator slots and the rotor bars, where the ratio includes 36/26, 54/44, 72/56, 72/58 or 72/62 for a six pole machine, 48/36, 72/52, 72/58 or 84/86 for an eight pole machine, and 60/44 or 60/46 for a ten pole machine. | 10-30-2014 |