Mark W Benson

US Patent:

6717323, Apr 6, 2004

Filed:

Jun 4, 2002

Appl. No.:

10/160257

Inventors:

Zareh Soghomonian - Sterling VA
Boris A. Maslov - Reston VA
Mark A. Benson - Leesburg VA

Assignee:

Wavecrest Laboratories, LLC - Dulles VA

International Classification:

H02K 1502

US Classification:

310254, 31015647

Abstract:

A rotary electric motor has a stator with a plurality of separate and ferromagnetically isolated electromagnet core segments disposed coaxially about an axis of rotation. Core materials such as a soft magnetically permeable medium that is amenable to formation of a variety of particularized shapes. The core segments are supported by a non-ferromagnetic structure. The rotor comprises a plurality of permanent magnets with surfaces that face an air gap separation from the stator, the surfaces having a common geometric configuration. The stator pole surface geometric configuration and the rotor magnet surface geometric configuration are skewed with respect to each other. The effect of this skewing arrangement is to dampen the rate of change of the magnitude of the cogging torque that is produced by the interaction between a rotor magnet and a pole of a non-energized stator electromagnet as the permanent magnet traverses its rotational path.

US Patent:

6727629, Apr 27, 2004

Filed:

Jun 4, 2002

Appl. No.:

10/160254

Inventors:

Zareh Soghomonian - Sterling VA
Boris A. Maslov - Reston VA
Mark A. Benson - Leesburg VA

Assignee:

Wavecrest Laboratories, LLC - Dulles VA

International Classification:

H02K 112

US Classification:

310254, 31015612, 310112

Abstract:

A rotary electric motor has a stator with a plurality of axially spaced sets of corresponding stator and rotor elements. The stator of each set is an annular ring with poles circumferentially positioned about an axis of rotation. The rotor of each set has a plurality of permanent magnets disposed circumferentially along an annular air gap opposite the stator poles. The permanent magnets of adjacent rotor element sets and/or the poles of adjacent stator sets are offset from each other in the axial direction to cancel the effects of cogging torque produce by each of the sets.

US Patent:

7064463, Jun 20, 2006

Filed:

Jul 20, 2004

Appl. No.:

10/893878

Inventors:

Kaiser Matin - Herndon VA, US
Mark A. Benson - Leesburg VA, US
Mansour Peyghaleh - Sterling VA, US

Assignee:

Wavecrest Laboratories LLC - Dulles VA

International Classification:

H02K 9/20
H02K 9/19

US Classification:

310 52, 310 54, 310 61, 310 64

Abstract:

A dynamoelectric machine, having a stator and rotor, is enclosed in a sealed housing. An impeller fixed to the rotor shaft creates air circulation through the housing and machine components for contact with one or more sealed containers of a coolant medium. The sealed container provides heat transfer from the circulated air through evaporation of the coolant medium. The sealed container has one closed end located within the housing and another closed end external to the housing. Heat from the evaporated coolant medium is transferred to the environment external to the housing through condensation of the vapor at the external end of the container. The sealed container may be stationary or rotatable with the rotor shaft. A plurality of heat transfer containers may be provided.

US Patent:

7687945, Mar 30, 2010

Filed:

Sep 25, 2004

Appl. No.:

10/949182

Inventors:

Kaiser Matin - Herndon VA, US
Mansour Peyghaleh - Sterling VA, US
Mark A. Benson - Leesburg VA, US
Ernest G. Penzenstadler - Herndon VA, US

Assignee:

Bluwav Systems LLC. - Rochester Hills MI

International Classification:

H02K 9/08
H02K 9/22
H05K 7/20
H02K 5/18
H02K 5/10

US Classification:

310 64, 310 52, 310 88, 310 89, 361704, 361709

Abstract:

A method and system of cooling an enclosure or motor is disclosed. An exemplary permanent magnet electric motor is formed with an external stator and an internal rotor. The motor controller is in thermal proximity to the motor but is thermally isolated from the motor by an air chamber. In one exemplary embodiment, one or more heat sinks are provided to create efficient heat removal paths. In another exemplary embodiment, one of more heat pipes are located in the system.

US Patent:

20140028531, Jan 30, 2014

Filed:

Jul 25, 2012

Appl. No.:

13/558080

Inventors:

Mohammad Sarehraz - Sterling VA, US
Huiwen Yao - Potomac MD, US
Martin Edwards - Indianlantic FL, US
Mark Andrew Benson - Leesburg VA, US

Assignee:

ORBITAL SCIENCES CORPORATION - Dulles VA

International Classification:

H01Q 15/12

US Classification:

343909

Abstract:

Methods and systems for mitigating disturbances in a dual gridded reflector antenna are provided. An antenna system that includes a first reflective surface, a second reflective surface, and an intercostal ring is provided. The intercostal ring is configured to connect the first reflective surface and the second reflective surface. A baffle is disposed between the intercostal ring and a path of the electromagnetic waves. The baffle is configured to redirect the electromagnetic waves away from the intercostal ring. Alternatively, the baffle is not present, and the intercostal ring is configured to redirect a perturbed portion of an electromagnetic wave away from wave paths of electromagnetic waves reflected by the first reflective surface and the second reflective surface, respectively.