Dennis H Locke

US Patent:

6717311, Apr 6, 2004

Filed:

Jun 14, 2001

Appl. No.:

09/881114

Inventors:

Dennis H. Locke - Schenectady NY

Assignee:

Mohawk Innovative Technology, Inc. - Albany NY

International Classification:

F16C 3906

US Classification:

310 905, 623 313, 417356

Abstract:

A magnetic bearing wherein axially spaced combinations of permanent magnets on a rotor and stator are polarized to levitate the rotor and positioned with the rotor magnets offset axially outwardly (or inwardly) of the stator magnets to allow a force balance to be achievable to bear axial thrust. An electrically energizable coil modulates magnetic flux between the respective stator and rotor magnets for each combination. A first electrical circuit regulates electrical energy to the coils for maintaining a reference position of the rotor. A second electrical circuit compares feed-back of electrical energy to at least one of the coils with a reference electrical energy of about zero amps or volts and integrates the differences until the difference is about zero to provide a signal to modify the reference position, whereby to attain a zero force balance position wherein the current which must be supplied to the coils may be reduced to near zero.

US Patent:

6770993, Aug 3, 2004

Filed:

Dec 18, 2001

Appl. No.:

10/023922

Inventors:

Hooshang Heshmat - Niskayuna NY
Erik E. Swanson - Schenectady NY
Dennis H. Locke - Schenectady NY

Assignee:

Mohawk Innovative Technology, Inc. - Albany NY

International Classification:

H02K 709

US Classification:

310 905, 384103

Abstract:

A hybrid foil-magnetic bearing wherein the foil and magnetic bearing parts share the load at predetermined speeds or operating conditions. Force, flux, strain, temperature, or acceleration sensors provide a measure proportional to actual load on at least one of the bearing parts, and this measure is inputted to a load sharing controller for dividing the load between the bearing parts. In order to provide control of a hybrid journal bearing which is substantially free of the effects of a bending mode node resulting from magnetic planes on opposite sides of the bearing and of sensor non-collocation, a pair of redundant sensors are provided on opposite sides respectively of the housing for regulating flux on the opposite sides respectively.

US Patent:

61915130, Feb 20, 2001

Filed:

Oct 27, 1998

Appl. No.:

9/179304

Inventors:

H. Ming Chen - Latham NY
James F. Walton - Ballston Lake NY
Dennis H. Locke - Schenectady NY

Assignee:

Mohawk Innovative Technology, Inc. - Albany NY

International Classification:

H02K 516

US Classification:

310 90

Abstract:

A magnetic bearing wherein a stator is magnetically interacted with a rotor and is movable in response to feed-back of rotor position to thereby use the magnetic interaction between the stator and rotor to effect movement of the rotor toward a predetermined rotor position for bearingly controlling the rotor position. The bearing may be a radial or thrust bearing.

US Patent:

49741659, Nov 27, 1990

Filed:

Nov 28, 1988

Appl. No.:

7/276787

Inventors:

Dennis H. Locke - Schenectady NY
Raymond A. Kirschbaum - Bettendorf IA

Assignee:

Mechanical Technology Incorporated - Latham NY

International Classification:

G05B 1919

US Classification:

36447435

Abstract:

A real-time machining control system is provided which includes a conventional computer numerical control and a dimensional measurement system which continually measures the actual diameter of the rotating workpiece and provides an error signal representing the difference between the actual diameter of the workpiece and that of the part program. The error signal is used to directly control the movement of the cutting tool to assure that the final actual machined profile and dimensions of the workpiece conform to the part program.