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| Number | Title | Issue Date |
| 7514832 | Single field rotor motor An electric motor having a single field rotor wherein the flux within the rotor is generated by magnetic means located at the end regions of the motor housing such that the flux within the motor rotor maintains a constant polarity. ... | 04/07/2009 |
| 7327061 | AC generator and method One aspect of the invention is a generator with at least two commutators mounted on a rotatable shaft. At least two magnetically conductive bars may be mounted in an opposed relationship with at least one of the bars passing through a wire coil. At least two magnets... | 02/05/2008 |
| 7296409 | Electric motor assisted turbocharger A turbocharger comprises a turbine wheel and a compressor wheel mounted to a turbocharger shaft. An electric induction motor is provided for assisting rotation of the compressor wheel in predetermined circumstances. The motor comprises a fixed stator having motor fi... | 11/20/2007 |
| 7288930 | Wheel-speed sensor Unlike known wheel-speed sensors, the wheel-speed sensor in accordance with the present invention is readily serviceable without disassembly of major components of the wheel assemblies and is relatively simple, and thus less expensive to manufacture, than known whee... | 10/30/2007 |
| 7288865 | Bicycle generator hub A bicycle generator hub is mounted to the front fork of a bicycle and includes a hub shaft, a hub shell, bearings, a generator mechanism and first and second magnetic flux recirculation members. The hub shaft is non-rotatably mounted to the front fork. The hub shell... | 10/30/2007 |
| 7282907 | Antifriction bearing unit having a sensor and a resolver An outer ring is provided with the stator of a resolver, and a ring member with the rotor of the resolver. The stator comprises an annular core and a winding provided around the core. The ring member is provided at a position opposed to the stator with an eccentric ... | 10/16/2007 |
| 7224147 | Buck/boost method of voltage regulation for a permanent magnet generator (PMG) A voltage regulation system maintains the output voltage of a permanent magnet generator at an essentially constant level. The stator coils located within the permanent magnet generator are divided into a number of sub-coils. A buck/boost voltage can be applied to s... | 05/29/2007 |
| 7205760 | Beam axle with integral sensor mount and target A vehicle axle assembly having an axle housing, an axle shaft and a sensor. The axle housing has a tubular portion. A flat is formed on an annular wall of the tubular portion proximate a distal end of the tubular portion. A hole, which intersects the flat, is formed... | 04/17/2007 |
| 7166938 | Horizontal and vertical transportation system using permanent magnet excited transverse flux linear motors Disclosed herein is a horizontal and vertical transportation system using permanent magnet excited transverse flux linear motors which is capable of linearly transporting an object in the horizontal direction and in the vertical direction using permanent magnet exci... | 01/23/2007 |
| 7132825 | Detection device A device for detecting the displacement of an object comprising a ferromagnetic material, comprises a magnetic circuit generator provided with first and a second cores made of ferromagnetic material and an excitation coil and a measurement coil. The magnetic circuit... | 11/07/2006 |
| 7102245 | Integral generator/pinion assembly for axle power generation A vehicular axle assembly includes an electrical generator for generating electricity to supply power to one or more electrical components therein during operation. The axle assembly includes a hollow housing that rotatably supports a differential mechanism therein.... | 09/05/2006 |
| 7069782 | Vehicle speed sensor mounting structure for a vehicle A vehicle speed sensor mounting structure of a vehicle for supporting a vehicle speed sensor. The structure includes a vehicle body for suspending an engine. The engine output is transmitted through a final reduction gear to wheels via an axle. A vehicle speed senso... | 07/04/2006 |
| 6954012 | Permanent electric motor with a speed sensor A PMDC motor with a speed sensor has a cup-like deep drawn rear housing. The speed sensor is located at the bottom of the housing and has an annular base plate supporting a coil with a steel pin core. The coil is connected to two terminals of a connector mounted on ... | 10/11/2005 |
| 6954014 | Motor with frequency generator and office automation equipment using same The invention relates to a motor with a frequency generator attached thereto, equipped with the frequency generator (FG) for detecting a rotational speed of the motor. The motor with the frequency generator attached thereto comprises a magnet having 10 poles of main... | 10/11/2005 |
| 6930433 | Brushless electro-mechanical device An electromotive machine having a stator element and a rotor element, the stator element including at least one set of N preferably toroidally shaped electromagnetic members, the electromagnetic members arranged along an arc a predetermined distance apart defining a... | 08/16/2005 |
| 6927567 | Passive eddy current blade detection sensor A passive blade detection sensor exploits the electrically conductive trait of typical turbo machinery components such as fan, compressor and turbine blades. A permanent magnet is placed strategically adjacent to a wire coil to generate a single pulse/antipulse sign... | 08/09/2005 |
| 6894484 | Wheel rotation detecting device A wheel rotation detecting device including a sensor unit that is supported on a stationary ring which does not rotate even when the wheel is in use, and the rotation of the wheel that is attached to a rotary ring can be detected by a rotation detecting sensor held ... | 05/17/2005 |
| 6836028 | Segmented arc generator A segmented arc generator is adapted to convert mechanical power such as wind or water power into electrical power at a wide range of wind or shaft speeds. A rotor has a plurality of salient poles disposed about a periphery of a rotor ring. A stator has a stator rin... | 12/28/2004 |
| 6376957 | Alternating current machine A generator or a 3-phase motor is arranged to provide multipolar permanent magnet excitation in combination with multipolar reluctance distribution wherein different numbers of poles are used for the permanent magnet excitation and for the reluctance dist... | 04/23/2002 |
| 6252325 | Switched reluctance motor In a switched reluctance motor and control system for such a motor, a rotor comprises four salient poles each having a width of about 50-degrees, and a stator has six salient poles each having a width of about 30-degrees. One Excitation winding is mounted... | 06/26/2001 |
| 6210596 | Magnetic ceramic composition and inductor using the composition A magnetic ceramic composition containing ferrite serving as a primary component and a sintering aid. The composition can be sintered at low temperature. The sintering aid contains about 2-45 mol % Li2 O; about 5-40 mol % RO, with R being at le... | 04/03/2001 |
| 6140727 | Pulse signal generator A pulse signal generator comprises a magnetic element (1) capable of causing a large Barkhausen jump; a detector (2) provided relative to the magnetic element; a magnetic field generator (3) provided in vicinity of the magnetic element for applying a bias... | 10/31/2000 |
| 6137268 | System with limited long-time-averaged battery charging rate A battery charging system in which current is averaged over a long time period (seconds) to determine the maximum average charging rate. When the integral of charging current over this long period reaches the programmed maximum charge value for one period... | 10/24/2000 |
| 6057622 | Direct control of air gap flux in permanent magnet machines A method and apparatus for field weakening in PM machines uses field weakening coils (35, 44, 45, 71, 72) to produce flux in one or more stators (34, 49, 63, 64), including a flux which counters flux normally produced in air gaps between the stator(s) (34... | 05/02/2000 |
| 5894219 | Magnetic sensor including a coil surrounding a pair of magnets, for detecting rotary motion A device for determining rotary motions generally includes a signal generator with inwardly directed teeth or inwardly directed projections and a double-sided measuring coil which is arranged within the surface of the signal generator. The measuring coil ... | 04/13/1999 |
| 5696442 | Rotational velocity sensor ring apparatus and method A rotational velocity sensor ring comprising a circular cylindrical body with a radially interior cylindrical surface, a radially exterior cylindrical surface and first and second cylinder ends, a plurality of substantially equally spaced, substantially e... | 12/09/1997 |
| 5696419 | High-efficiency electric power generator An electrical generator has a plurality of C-shaped stator members which are made of magnetically permeable material. Each C-shaped stator member includes a respective stator winding, and the stator members are positioned such that the ends of the members... | 12/09/1997 |
| 5508608 | Magnetic flux device for measuring rotary motions and for generating an electric alternating signal representative of the rotary motions A device for measuring rotary motions having a signal generator ring which rotates with the rotating part and of a double-sided measuring coil. Within the core of the measuring coil there are a permanent magnet, which is magnetized perpendicularly to the ... | 04/16/1996 |
| 5416372 | Induction type motion sensor The sensitivity of an induction-type motion sensor having a magnetic circuit with a permanent magnet to small movements is increased by the use of a stator with a core containing a permanent magnet as a fixed part thereof. An electrical coil is wound arou... | 05/16/1995 |
| 5376851 | Variable reluctance motor with full and short pitch windings A variable reluctance drive system including a motor and corresponding converter for improved current commutation is described. The motor incorporates a salient pole rotor and a salient pole stator having one or more full pitch windings which operate by m... | 12/27/1994 |
| 5291130 | Vehicle wheel speed sensor employing an adaptable rotor cap A vehicle wheel speed sensor incorporated on an axle spindle hub and hub cap assembly of the type using permanent magnets to generate a magnetic field having a magnetic path conducted through a plurality of teeth on a flange extending from the hub cap int... | 03/01/1994 |
| 5281911 | Vehicle wheel speed sensor employing a locating plate A vehicle wheel speed sensor of the type using permanent magnets to generate a magnetic field having a magnetic path which is conducted through a plurality of teeth on a rotor into a plurality of teeth on a stator with relative motion therebetween where t... | 01/25/1994 |
| 5124602 | DC motor unit with a rotational speed detector A d.c. motor unit with a rotational speed detector comprising a d.c. motor (1) having an output end and an idle end, and a rotational speed detector (14) water-tightly attached to the motor output end. The d.c. motor (1) comprises a motor frame (2) includ... | 06/23/1992 |
| 5059884 | Variable reluctance motor providing holding torque A variable reluctance motor (10, 100, 200) for providing holding torque in accordance with the invention includes a magnetically permeable rotor (12); a stator (18) axially aligned with the rotor having at least one phase winding (22) for producing a magn... | 10/22/1991 |
| 5057727 | Shaft position sensor employing a wiegand-effect device A Wiegand-effect shaft position sensor is excited by an alternating magnetic field generated by stationary magnets or solenoids interacting with a high-strength, toothed wheel that is fixed to the rotor. A set of three stationary poles are situated proxim... | 10/15/1991 |
| 5045784 | Tachometer noise reduction system using a pickup coil to cancel the noise from the tachometer signal A current carrying drive coil in a magnetic field is moved by the field. An attached tachometer coil, passing through the same field, produces a voltage from which the speed of the coils may be calculated. Changes in the drive coil current produce noise i... | 09/03/1991 |
| 5023546 | Variable reluctance rotation sensor with changing coil linkages and a pair of flux producing magnets A variable reluctance rotation sensor comprises a rotatable magnetic toothed wheel adjacent a fixed magnetic pickup assembly. The pickup assembly comprises a pair of permanent magnets, each with a similar pole adjacent the wheel and separated circumferent... | 06/11/1991 |
| 5023547 | Variable reluctance rotation sensor with changing flux linkages and including a pair of oppositely poled magnets A variable reluctance rotation sensor comprises a rotatable toothed wheel and a magnetic pickup assembly comprising a pair of permanent magnets each having a pair of poles with an opposite one of said poles adjacent the toothed wheel. The permanent magnet... | 06/11/1991 |
| 4989574 | Electromagnetic pickup An electromagnetic pickup has a coil and a core. A noise shielding cylindrical member of magnetic material is provided around the coil to form an open magnetic circuit between the noise shielding member and the core.... | 02/05/1991 |
| 4977372 | Tachometer device having limiting means for limiting frequency variations A tachometer device having a sensor generating an electrical signal at a frequency which is proportional to a speed to be detected, an operating drive member, and electrical link means connecting the sensor to the operating drive member. A device for limi... | 12/11/1990 |
