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| Number | Title | Issue Date |
| 7362018 | Encoder alternator An encoder alternator for an internal combustion engine has a rotor with a plurality of circumferential magnetic rotor poles in a periodic pattern except for at least one magnetic irregularity. A sensor coil is wound around a stator pole and outputs a crankshaft pos... | 04/22/2008 |
| 7348699 | Encapsulated motor A canned motor providing a rotor having a rotor shaft; a can having a cylindrical wall which is closed at one end; and a stator, the cylindrical wall of the can being inserted between the rotor and the stator. To measure the rotational position and, where applicable... | 03/25/2008 |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7274989 | Borehole equipment position detection system It is important to know the precise position of equipment when testing of the BOP, testing the wellhead, flow testing the well, kick control, well circulation and testing of spool trees between the wellhead and the BOP. Accordingly, there is provided a system for de... | 09/25/2007 |
| 7095128 | Method and device for regulating a wind machine A method and corresponding apparatus for regulating a system that produces electric power, the system including an electric alternator having a rotor integral with a rotating part of a wind machine to form a rotary assembly, and a power electronics module, the metho... | 08/22/2006 |
| 7030532 | Variable reluctance resolver A variable reluctance resolver has a rotor which includes a noncircular core and which is rotatably supported inside a stator with a gap therebetween. The shape of the rotor is such that the gap permeance, which is based on the gap, varies according to a sine functi... | 04/18/2006 |
| 6998747 | Multiplex resolver A multiplex resolver includes m resolver units disposed in tandem each comprising a rotor and a stator, where m is an integer not less than 2. The stator has a stator yoke, a plurality of stator magnetic poles projecting from the yoke, and excitation and output wind... | 02/14/2006 |
| 6930423 | Rotation angle detector According to the present invention, when using a pair of annular stators stacked together, they are deviated from each other so that the projected poles may not overlap each other, whereby continuous winding is possible for each winding. Thus, a reduction in cost is... | 08/16/2005 |
| 5763976 | Stator wound resolver with staggered rotor A stator wound resolver comprising: a stator and a rotor aligned on an axis; the stator having a plurality of teeth with input and output windings disposed on some or all of the teeth, the input and output windings exhibiting a mutual inductance character... | 06/09/1998 |
| 5757182 | Variable-reluctance-type angular rotation sensor with sinusoidally distributed winding A variable-reluctance-type angle sensor having an output winding wound in each slot on a one-slot pitch basis and in a sinusoidal distribution. The variable-reluctance-type angle sensor is so structured that the number of the poles of exciting windings is... | 05/26/1998 |
| 5650680 | Dynamo electric machine with permanent magnet rotor structure A permanent magnet generator includes an annular stator with windings on the inner face. A round rotor is rotatably mounted in the stator, and includes a plurality of circumferentially spaced rectangular openings inwardly of the outer peripheral portion o... | 07/22/1997 |
| 5486731 | Sinusoidally distributed winding method suitable for a detector winding A sinusoidally distributed winding method suitable for a detector winding comprises the steps of serially connecting winding groups (x) wound sequentially at one-slot intervals to form a one-phase shunt winding group (y), and constructing an n-phase shunt... | 01/23/1996 |
| 5444321 | Induction alternating current generator and a generation method Object of the present invention is to provide an induction alternating current generator on vehicle and a method for generating alternating current in a generator on vehicle, which improve the efficiency of the generator by increasing magnetic flux permea... | 08/22/1995 |
| 5256923 | Switched reluctance motor with sensorless position detection A switched reluctance motor (10) provides position and speed detection without a shaft position sensor. At least one of the stator pole faces (54) and/or at least one of the rotor pole faces (60) has an irregularity such as a notch (52 and/or 58) providin... | 10/26/1993 |
| 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 |
| 5033028 | Reaction mass actuator This disclosure describes apparatus and method for overcoming stroke limitations of moving coil reaction-mass vibration dampers, by recovering armature stroke displacement. The coil housing is selectively coupled or de-coupled to the vibrating structure. ... | 07/16/1991 |
| 4935708 | High energy pulse forming generator A machine is disclosed having the ability to generate high energy pulses of electrical power with a high degree of flexibility in the shape of the pulse. Different mechanism provide non-uniform or non-symmetrical magnetic flux density distributions throug... | 06/19/1990 |
| 4928046 | Multiple rotational position sensor A multiple rotational position sensor includes a stator winding provided to a stator mounted to a casing and a rotor having a rotor winding provided to a rotor shaft mounted for rotation to the casing, in which the rotational position is sensed by the rel... | 05/22/1990 |
| 4881002 | Miniature motor A miniature motor comprising a stator having permanent magnets constituting a two-pole field, and a rotor having rotor windings wound on a rotor core of a three-pole construction, in which the rotor core is formed in such a manner that the cross-sectional... | 11/14/1989 |
| 4780632 | Alternator having improved efficiency An alternator having a rotor which extends obliquely with respect to its axis of rotation between at least a pair of pole pieces having power windings disposed therein with the turns of the windings facing the pivotal axis of the rotor. Upon driving the r... | 10/25/1988 |
| 4757224 | Full flux reversal variable reluctance machine A full flux reversal variable reluctance machine is disclosed. The stator includes a plurality of poles and electrical windings surrounding a portion of the stator. The rotor comprises main and shunt components that have alternate sections of high and low... | 07/12/1988 |
| 4743786 | Rotational position detection device This rotational position detection device comprises a stator section including primary and secondary windings and a rotor section disposed in such a manner that it is capable of performing relative rotational displacement with respect to the stator sectio... | 05/10/1988 |
| 4705975 | Synchro-generator The present synchro-generator comprises a stator, which comprises at least two signal windings, which are offset predetermined angles relative to each other, and a rotor, which carries an exciter winding (3). In order to provide a structure which is simple and... | 11/10/1987 |
| 4705971 | Linear resolver A linear resolver wherein a stator is made of a magnetic material and is toothed at equal pitches along the direction of measurement, and a movable element is an electromagnet made of an E type or C type core around which a primary single phase winding W | 11/10/1987 |
| 4672347 | Multi-speed resolver using ferrite stator and rotor structures A resolver which in a preferred embodiment utilizes a stator member, preferably made of a single piece of ferrite material, which has active stator sine poles and active stator cosine poles and a rotor member which has passive rotor poles. The active stat... | 06/09/1987 |
| 4659953 | Magnetic structure for synchro and tachometer A magnetic structure including a stator including sensor windings and a field exciter, and a movable armature having a variety of applications, including a synchro resolver and a tachometer. The stator comprises a plurality of planes of oppositely polariz... | 04/21/1987 |
| 4636674 | Linear flux switch alternator A stator adapted for mounting adjacent the periphery of a moving machine gear, whereby the gear serves as a rotor in an electric alternator. A pair of elongated pole pieces are mounted in parallel adjacent the gear periphery. Dependent teeth are formed on... | 01/13/1987 |
| 4599531 | Rotation detector A rotation detector for detecting the rotational speed and phase of the upper rotary drum of a guide drum of a VTR in respect to the stationary drum of the guide drum as the upper rotary drum rotates about its rotational axis, the rotation detector includ... | 07/08/1986 |
| 4562399 | Brushless DC tachometer An alternator for use in a brushless DC tachometer which produces are output voltage with a trapezoidal waveshape. The alternator includes a three phase toroidal winding on a plotless core. The windings are concentrated rather than being distributed. The ... | 12/31/1985 |
| 4528471 | Positioning sensor To provide association of a particular angular position of a gear, for example the starter gear of an internal combustion (IC) engine, with an inductive pick-up (10), at least one tooth (15) is made a marker tooth by relieving the end portion (15') over a... | 07/09/1985 |
| 4316110 | Signal generating device A signal generating device comprising a bistable magnetic device which alters its magnetic state when the density of magnetic flux to which it is subject passes through a predetermined value, and detecting means providing an output signal responsive to a ... | 02/16/1982 |
| 4284916 | Rotary signal generator A non-contact signal generator which is adapted for the conduction signal source for the semi-conductor ignition system of so-called current-breaking type or induced-energy accumulating type and which is of the permanent-magnet-energization, variable magn... | 08/18/1981 |
| 4275322 | Ignition system with active pulse discriminating means Disclosed herein is a rotary pulse generator including an armature having a two-magnet assembly including spaced pole pieces defining a pair of spaced gaps, an armature plate including a charge core and charge coil mounted thereon, and a trigger core and ... | 06/23/1981 |
| 4266153 | Demodulator of polyphase voltages interfering among themselves A demodulator for the demodulation of polyphase, in particular triphase, voltages interfering among themselves and constituting a system of polyphase pseudo-sinusoidal voltages modulated in amplitude to a pulsation &3xb5;, to obtain a system of polyphase ... | 05/05/1981 |
| 4263525 | Signal generating means A signal generating means comprising a bistable magnetic device which alters its magnetic state when the density of magnetic flux to which it is subject passes through a predetermined value, and detecting means providing an output signal responsive to a c... | 04/21/1981 |
| 4260944 | Pulsating signal generator for the production of polyphase voltages of interference A pulsating signal generator for the production, in particular, of 3 systems of triphase voltages, in which the resulting pseudo-sinusoidal voltages of the 3 systems are modulated in amplitude at predetermined, fixed or variable pulsation &3xb5;, and stag... | 04/07/1981 |
| 4250380 | Rotation angle detector In the construction of a photoelectric type rotation angle detector for a rotatable or turnable object including a photoelectric transducer, an optical interceptor and a comparator circuit, a cylindrical light interceptive portion extends parallel to the ... | 02/10/1981 |
| 4236094 | Ignition transducer for vehicle engines A magnetic interrupter type transducer for providing an ignition signal with alternating peaks and varying progressively between the peaks. The shape of the signal is a function of the configuration of the opposed surfaces between a rotor and an adjacent ... | 11/25/1980 |
| 4166966 | Rotary pulse generator for automatic engine ignition advance and retard An engine driven rotor has pairs of arms of different lengths passing by the stator core teeth with respectively different clearances. The stator teeth carry pick-up coils that are connected in series-aiding relation. Although the stator teeth are uniform... | 09/04/1979 |
| 4156192 | Inductive displacement transducer using plural magnetic screens rotatable about different axis to modify an inductance proportional to the displacement An inductive transducer intended, according to the invention, for converting the displacement of mechanical objects into an electric signal, comprising primary and secondary coils with cores, connected to one of mutually moving mechanical objects. The coi... | 05/22/1979 |
