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| Number | Title | Issue Date |
| 7138782 | Motor control system and method of the same The present invention provides a motor control system and method thereof. The motor control system comprises a motor controller and a compensation device. The motor controller is used for generating a motor control output according to a reference signal and a first ... | 11/21/2006 |
| 7129665 | Control apparatus for feed driving system A control apparatus for a machine that can be operated at high precision in a stable control state is provided by driving a movable body with control parameters suited to the mechanical state. A control parameter calculation circuit is provided to obtain control par... | 10/31/2006 |
| 7102317 | Method and apparatus to process an analog encoder signal A method and apparatus to process an analog encoder signal. The apparatus includes an analog encoder pattern generating unit, an analog encoder pattern storage unit, a digital/analog converting unit, a comparing unit, a recent state latch unit, a present state deter... | 09/05/2006 |
| 6995538 | Rotational direction detecting apparatus for a three-phase brushless DC motor A region judging circuit judges an electric angle region of a three-phase brushless DC motor based on an output signal of a resolver. A latch timing output circuit determines an optimum latch timing. A driving direction judging circuit judges a rotational direction ... | 02/07/2006 |
| 6958602 | High-accuracy 1X variable-reluctance resolver A high-accuracy, 1X VR resolver includes a first rotor portion having (N−1) salient poles, where N is an arbitrary integer not less than 3, a second rotor portion having N salient poles, a first stator portion having an input coil and an output coil for a shaft an... | 10/25/2005 |
| 6384598 | Inductive position sensor having multiple receiving geometries Described is an inductive position sensor, in particular for a motor vehicle, which has an oscillator circuit that generates a periodic alternating voltage signal and couples into an exciting coil, several receiving coils each of which forms a periodicall... | 05/07/2002 |
| 6239571 | Resolver A resolver comprises excitation windings for receiving excitation signals and a detection winding for outputting a detection signal. Displacement of a passive member provided with the excitation windings or the detection winding is detected on the basis o... | 05/29/2001 |
| 6013999 | Stepper motor control that adjusts to motor loading A system and method are provided for controlling a stepper motor having a rotor and a multi-phase stator. Sinusoidal command signals define a commanded position of the motor's rotor. An actual position of the rotor is sensed as a function of an electrical... | 01/11/2000 |
| 5867023 | Converter circuit for rotary transformer sensing devices A converter circuit for converting an alternating signal representing continuous rotary position into a further signal representing discrete rotary position samples the polarity of an envelope of the alternating signal and develops a state change in the f... | 02/02/1999 |
| 5329216 | Multi-shaft driving apparatus and fluid rotary apparatus A multi-shaft driving apparatus includes a plurality of motors each for rotating one of a plurality of shafts to be synchronously rotated, an encoder, provided for each motor, for detecting a rotational state of the shafts, a pulse generator for generatin... | 07/12/1994 |
| 5221882 | Motor servo apparatus Where T1 is a period of a dynamic operation range of a phase comparative waveform of a motor servo apparatus, and a period T0 of a reference phase signal is measured, the reference phase signal is delayed by T3 =T0 | 06/22/1993 |
| 5204603 | Open circuit detection for a pulsed resolver position sensing system An auxiliary resolver position tracking (RPT) system for an industrial robot includes a resolver excitation and monitoring system which is powered by an uninterruptable power supply which includes a battery. The RPT system generates trapezoidal excitation... | 04/20/1993 |
| 5189353 | Resolver system A resolver system includes a resolver having an annular rotor, and an annular stator arranged around the annular rotor in spaced relationship thereto. The rotor and the stator are arranged such that the reluctance of a space defined between the rotor and ... | 02/23/1993 |
| 5173696 | Control circuitry using electronic emulation of a synchro signal for accurate control of position and rate of rotation for shafts The invention herein disclosed is a digital circuit which emulates a synchro signal in a synchro-resolver follower system for precise control of shaft position and rotation at very low rotational rates. The subject invention replaces the synchro and drive... | 12/22/1992 |
| 5027047 | Half angle mechanism for a heliostat An improved heliostat device for an electrooptical system in which a mirror is gimbaled in two axes for line-of-sight direction and stabilization. A half angle drive system is connected to the mirror for controlling azimuth rotation of the mirror relative... | 06/25/1991 |
| 4978900 | DC sine cosine servo system A DC to DC sine/cosine positioning servo system has an electro-mechanical DC to AC converter. The latter includes a DC torquer, having a rotor with respective windings for receiving two DC input signals proportional to the error signals detected. Mechania... | 12/18/1990 |
| 4970450 | Deriving rotational rate and angular position with a function generator Angular position and rotation rate of a function generator having stator windings and rotor windings are determined by first amplitude modulating a carrier oscillation to form a sine signal and a cosine signal and then feeding the sine signal and cosine s... | 11/13/1990 |
| 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 |
| 4906909 | Analog electronic control differential transmitter A linear, analog, synchro control differential transmitter for implementing he common synchro CDX function whereby a scaled linear analog voltage is used as input instead of a mechanical shaft angular displacement. Alternate synchro functions of CT and CX ... | 03/06/1990 |
| 4855744 | Angle digitizer A system for producing a digital representation of the value of an angle θ, typically a phase angle, from two analog input quantities representative of A sin θ and A cos θ, where A is an amplitude factor, comprises logarithmic amplifiers (IC1-IC4) whic... | 08/08/1989 |
| 4667138 | Multiplexed synchro driver An improved drive control circuit is disclosed for enabling the multiplexed drive of synchro receivers. A zero crossing detector is coupled to sense the zero crossings of a signal driving the excitation winding of a synchro receiver. A counter coupled to ... | 05/19/1987 |
| 4598289 | Control device for a synchro receiver A control device suitable for synchros comprising three stator windings. The device comprises four circuit branches with the inputs of the first and the second branches interconnected to receive a first voltage from the ends of the stator windings of the ... | 07/01/1986 |
| 4492901 | Control system for synchronizing combination press line A control system for synchronizing a combination press line comprised of a transfer press and a double-action press. The transfer press is set as a master press and the double-action press as a slave press following the transfer press in operation. The transfe... | 01/08/1985 |
| 4455519 | Torque receiver controller The disclosure describes a device for continuous analog position control of multiple torque receivers by a single low power synchro signal source. The device provides continuous control of the magnitude and direction of current flow between the stators of... | 06/19/1984 |
| 4430640 | Step data to synchro converter A step data to synchro converter for coupling one of a plurality of different step data transmitters to one of a plurality of different synchro receivers. The output of the step data transmitter is applied to an interface circuit and processed into a thre... | 02/07/1984 |
| 4428053 | Adaptive compass and north stabilization drive system This system accepts compass outputs from a wide variety of compass output devices such as stepper and synchro devices having different coupling ratios, supply voltages and carrier frequencies. The system then, as part of a PPI radar system, electronically... | 01/24/1984 |
| 4358722 | Speed detector using resolver In a speed detector having a fixed frequency oscillator for producing two-phase sine waves to excite two-phase exciting windings of a resolver, first and second multipliers for multiplying the output of the detecting winding of the resolver by the two-pha... | 11/09/1982 |
| 4357566 | Transducer system with velocity signal generation To generate a signal having at all times an amplitude directly proportional to the velocity of relatively moving members, a plurality of phase displaced position indicative signals are first generated. A pair of the position signals that are phase displac... | 11/02/1982 |
| 4346334 | DC Servomotor system An automatic motion or position control DC servomotor system in which a load-driving axis driven by a DC motor to be controlled in one rotary mechanism is rotated synchronously with, or following the rotation of, a reference axis manually operated or driv... | 08/24/1982 |
| 4342952 | Synchro stabilizer circuit A circuit for overcoming variations in the output signals from a synchro device resulting from a.c. supply voltage variations includes means to provide a pulse train in which the pulse widths are modulated in accordance with supply voltage variations. A s... | 08/03/1982 |
| 4328483 | Multiplexed-demultiplexed synchro demodulation apparatus The outputs of a three-wire synchro are applied to a multiplexer which provides the multiplexed synchro outputs to an amplifier and demodulator. The demodulated synchro outputs are applied to a demultiplexer whose outputs are filtered to provide demodulat... | 05/04/1982 |
| 4325013 | Electrical tracer control system utilizing sine wave resolution A control for a profiling machining tool, and a method for controlling such a tool. The machine tool includes a sensing head which moves along a template or pattern to produce a signal that causes motors relatively to shift a cutting tool and a workpiece ... | 04/13/1982 |
| 4264852 | Follower device with differentiated speeds for gyrocompasses with mechanical suspension A detector responsive to an angular offset between a gyrosphere of a gyrocompass and a tilt ring, forming part of a gimbal mounting therefor, controls a follower motor coupled through a reduction gearing with a suspension shaft for that mounting, the shaf... | 04/28/1981 |
| 4254369 | High accuracy shaft angle linear DC voltage conversion using low accuracy devices In order to provide high accuracy shaft angle to linear DC voltage conversion using low accuracy devices, a linear synchro is excited by a 2.5 KHZ square wave which is power buffered, the square wave also used to synchronously demodulate the output of the... | 03/03/1981 |
| 4247810 | Angle to bipolar analog converter The control system uses shaft angle controlled synchro resolver devices for producing reversible polarity signals related to the variable shaft angle position and independent of variations in the amplitude of the electrical carrier excitation of the synch... | 01/27/1981 |
| 4193059 | Attitude indicator comparator warning system The indications of attitude indicators at two different indicating locations that are indicating the same parameter but actuated from different sources, are monitored for the same indication by electrically interconnecting two transolvers that are mechani... | 03/11/1980 |
| 4151452 | Synchro drive An arrangement for controlling a plurality of synchro receivers from a single command position. The system requires very little power relative to the torque produced in the controlled synchros. The desired synchro movement is achieved by selective interco... | 04/24/1979 |
| 4138661 | Attitude indicator having expanded scale A roll and pitch servomechanism for use in an attitude indicator is shown having an expanded scale in which a nonlinear electrical circuit is combined with a nonlinear mechanical indicator to produce an accurate indication of pitch attitude over an expand... | 02/06/1979 |
| 4103215 | Torque repeater self-driver A device employing the inherent self-torquing properties of a torque repeater to position its rotor. In the present invention, the torque repeater or synchro may have three stator windings and an output rotor. It is contemplated that the electrical input ... | 07/25/1978 |
| 4095159 | Electronic apparatus for automatic closed loop positioning of mobile members associated with an electromagnetic transducer with two pairs of windings This invention relates to an electronic apparatus for automatic positioning and distance measurement of mobile members. The apparatus according to the invention comprises a rotary electromagnetic transducer with two pairs of windings, in which the primary... | 06/13/1978 |
