Walter H Parfomak, 9335 Orchard St, Wallington, NJ 07057

5559417, Sep 24, 1996

May 11, 1994

8/241300

Jerome Sears - Wyckoff NJ
Walter Parfomak - Wallington NJ
Walter J. Kluss - Kearny NJ

AlliedSignal Inc. - Morris Township NJ

G05B 1700

318689

A two degree of freedom gyroscope having a drive motor (20), with a permanent magnet rotor (22), which includes an optical sensor (11) for providing an X-axis signal and a Y-axis signal which are indicative of the displacement of the actual rotor (22) spin axis from the null spin axis (28), a torquer coil (26) looped around the permanent magnet rotor (22) and disposed in a plane orthogonal to the null spin axis, and torquer drive elements (52, 54, 56) responsive to the X-axis and Y-axis signals induced in the sensor when the actual rotor (22) spin axis is displaced form the null spin axis (28) for providing current to said torquer coil (26) to urge the axes to coincide. A voltage induced in an open phase of a two phase motor stator is used to provide the instantaneous position of the rotor poles to obtain correct phasing information for commutation of the single polar torquer.

5751131, May 12, 1998

Aug 14, 1996

8/698214

Jerome Sears - Wyckoff NJ
Walter Parfomak - Wallington NJ
Walter J. Kluss - Kearny NJ
Michael Germinario - Harrington Park NJ

AlliedSignal, Inc. - Morristown NJ

H02P 126

318778

A two-phase motor includes two orthogonally disposed stator windings and a permanent magnet rotor. One of the stator windings is energized with a maximum energizing input for a narrow time period, whereupon the rotor is driven to a position intermediate the two stator windings. At the end of the narrow time period, the other of the stator windings remains energized whereupon the rotor is driven to align with the magnetic flux generated by the other winding. A switching arrangement is actuated to prevent loading on the one phase winding while the back EMF from the one winding is conditioned and interrogated for magnitude and for rotor direction. When the proper magnitude and direction are sensed the switching arrangement renders the motor in a run mode while closing the drive loop for the one phase winding which is now driven with a maximum input. As the rotor accelerates toward the one phase winding the back EMF from the undriven phase winding is converted from an angular rotor rate signal to an angular rotor position feedback signal, and which back EMF is used to determine if the motor is actually running so as to prevent restart, or to repeat the starting sequence, as the case may be.

5796227, Aug 18, 1998

Feb 18, 1997

8/801879

Jerome Sears - Wyckoff NJ
Walter Parfomak - Wallington NJ
Walter Kluss - Clifton NJ

H02K 2300

318254

During the initialization phase, the rotor (or wheel) of a gyroscope is aligned by application of an alignment pulse to insure that it rotates in a known direction upon start up. However, without some means for damping the rotor, the rotor will oscillate about the null position for an excessive period of time. The back emf signal induced in the non-excited winding can be used to generate a feedback signal for modifying the alignment pulse to minimize oscillation. In one variation, the back emf signal is frequency multiplied and inverted, and then combined with the alignment pulse. The combined signal is applied to the winding to rapidly align the wheel.

5321986, Jun 21, 1994

Aug 21, 1992

7/933277

Jerome Sears - Wyckoff NJ
Walter Parfomak - Wallington NJ
Walter Kluss - Kearny NJ

AlliedSignal Inc. - Morris Township, Morris County NJ

G01C 1930
G01C 1928

74 546

A two degree of freedom gyroscope having a drive motor (20), with a permanent magnet rotor (22), which comprises a sensing coil (32) looped around the permanent magnet rotor (22) and disposed in a plane orthogonal to a null spin axis, a torquer coil looped around the permanent magnet rotor (22) and disposed in a plane orthogonal to the null spin axis, and torque drive elements (62, 64, 65) responsive to the signal induced in the sensing coil (32) when the actual rotor (22) spin axis is displaced from the null spin axis (28) for providing current to said torquer coil (34) to urge the axes to coincide. Demodulators (70, 72) can be provided for providing output information in an X-Y coordinate format which is indicative of the actual input angular rates about corresponding axes.

4492902, Jan 8, 1985

Apr 5, 1984

6/597036

William Ficken - Berkeley Heights NJ
Jerome Sears - Wyckoff NJ
Walter Parfomak - Wallington NJ

Allied Corporation - Morris Township, Morris County NJ

H02K 2300

318254

A motor for an inertial sensing instrument includes a permanent magnet rotor and a stator having a driving winding inductively coupled to a sensing winding, with both windings connected to a common impedance. A feedback arrangement is provided which compensates for noise inducted by the common impedance in a sensing signal provided by the sensing winding.

5313148, May 17, 1994

Dec 2, 1992

7/985091

Jerome Sears - Wycoff NJ
Walter Parfomak - Wallington NJ
Walter J. Kluss - Kearny NJ

AlliedSignal Inc. - Morris Township, Morris County NJ

G05B 1700

318689

A two degree of freedom gyroscope having a drive motor (20), with a permanent magnet rotor (22), which includes an optical sensor (11) for providing an X-axis signal and a Y-axis signal which are indicative of the displacement of the actual rotor (22) spin axis from the null spin axis (28), a torquer coil (26) looped around the permanent magnet rotor (22) and disposed in a plane orthogonal to the null spin axis, and torquer drive elements (52, 54, 56) responsive to the X-axis and Y-axis signals induced in the sensor when the actual rotor (22) spin axis is displaced from the null spin axis (28) for providing current to said torquer coil (26) to urge the axes to coincide.

4818922, Apr 4, 1989

Oct 22, 1986

6/921491

Jerome Sears - Wyckoff NJ
Walter Parfomak - Wallington NJ
Walter Kluss - Clifton NJ

Allied-Signal Inc. - Morris Township, Morris County NJ

H02K 2900
G01C 1928

318313

The present invention deals with an apparatus and method for starting and running permanent magnet motors based on angular position information using an optical commutation technique. The optical commutation technique provides rotor position information at rest and while rotating for two-phase driving of a motor having a permanent magnet rotor. The angular position information is extracted by optical detectors, consisting of a light source and an optical sensor for detecting an optical pattern formed on the gyro rotor. The optical pick off associated with one phase is used to commutate the other phase. The optically detected signal output is converted to a frequency signal which is proportional to wheel speed. The frequency signal is converted to a voltage signal which is compared to a speed command signal in a feedback loop to generate the required drive. Alternately the frequency can be inputted to a phase lock loop circuit and compared with a speed reference clock frequency to generate the required drive signal level.

5953491, Sep 14, 1999

Sep 29, 1997

8/940662

Jerome Sears - Wyckoff NJ
Walter Parfomak - Wallington NJ
Walter J. Kluss - Clifton NJ

AlliedSignal Inc. - Morristown NJ

H02P 517

388811

The speed of a rotor in a two-winding, permanent magnet motor can be accurately controlled with a dual-polarity pulse width modulation drive signal. The phase back emf signal generated in the non-excited winding is compared against the phase of a command signal and the results of the comparison are used to vary the duty cycle of the drive signal.