John Robert Luneau

US Patent:

46599533, Apr 21, 1987

Filed:

Oct 24, 1986

Appl. No.:

6/921898

Inventors:

John R. Luneau - Moultonborough NH

Assignee:

Resolvex Corporation - Meredith NH

International Classification:

H02K 3900

US Classification:

310111

Abstract:

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 polarized parallel magnetic pole pieces contained in an annular or toroidal structure of rectangular cross-section to circumferentially surround the movable rotor or armature. The parallel pole pieces of opposite polarity form a segment extending radially inward, and are surrounded by a plurality of sense windings, wherein the rotor selectively provides a relatively low reluctance path to one or more of the pole pieces, causing a change in flux and corresponding voltage to be produced in the sense windings. In one embodiment, the pole pieces are energized by a permanent magnet located in the stator to produce a tachometer output voltage upon the sense windings. In that configuration the sense winding signals vary in amplitude according to velocity and position.

US Patent:

RE328570, Feb 7, 1989

Filed:

May 12, 1987

Appl. No.:

7/048959

Inventors:

John R. Luneau - Center Harbor NH

Assignee:

Resolvex Corporation - Center Harbor NH

International Classification:

H02P 914
G01P 346

US Classification:

322 61

Abstract:

A generator providing both tachometer and synchro outputs and comprising a magnetic stator and a corresponding armature structure. The generator stator structure produces a composite magnetic field of both constant (DC) and alternating (AC) flux. The rotor directs the composite flux field through a plurality of sensing coils, each producing a signal from the sensed composite magnetic field and rotor motion, and which coil signal is separated into separate signal components. The components are processed to produce a synchro output which preferrably has standard Hall-effect equivalent signals, as well as providing a tachometer output voltage proportional to the rotor rotational velocity and direction.

US Patent:

46058893, Aug 12, 1986

Filed:

Aug 21, 1984

Appl. No.:

6/642992

Inventors:

John R. Luneau - Moultonborough NH

Assignee:

Resolvex Corporation - Center Harbor NH

International Classification:

H02P 914
G01P 346

US Classification:

322 61

Abstract:

A generator providing both tachometer and synchro outputs and comprising a magnetic stator and a corresponding armature structure. The generator stator structure produces a composite magnetic field of both constant (DC) and alternating (AC) flux. The rotor directs the composite flux field through a plurality of sensing coils, each producing a signal from the sensed composite magnetic field and rotor motion, and which coil signal is separated into separate signal components. The components are processed to produce a synchro output which preferrably has standard Hall-effect equivalent signals, as well as providing a tachometer output voltage proportional to the rotor rotational velocity and direction.

US Patent:

40792781, Mar 14, 1978

Filed:

Sep 4, 1975

Appl. No.:

5/610429

Inventors:

John R. Luneau - Weston MA

Assignee:

Torque Systems Incorporated - Waltham MA

International Classification:

H02K 1500

US Classification:

310154

Abstract:

A permanent magnet servomotor having a split series aiding field adapted for direct connection to an SCR or other switching type drive amplifier and permitting the use of high flux density permanent magnet poles which provide an intended high field strength to accomplish commutation at higher horsepower while being immune from pole demagnetization.