Gregory I Rozman, Jacek F Gieras, Steven J Moss: Generator architecture with main field rotating power converter. United Technologies Corporation, Kinney & Lange P A, June 9, 2015: US09054610 (3 worldwide citation)

A generator includes a stationary portion and a rotating portion. The stationary portion includes a main armature winding and the rotating portion includes a main field winding a main field rotating power converter that selectively controls current supplied to the main field winding.

Gregory I Rozman, Jacek F Gieras, Andreas C Koenig: Electric power generation and conversion with controlled magnetics. Hamilton Sundstrand Corporation, Stephen G Mican, February 8, 2011: US07885089 (3 worldwide citation)

A power conversion system comprises: a source of multiphase high frequency alternating current (AC) electrical input power; a high frequency controlled magnetics transformer for each phase of the multiphase high frequency AC input power, with each transformer having a primary winding coupled to its ...

Gregory I Rozman, Vietson M Nguyen, Jacek F Gieras: Motor drive system with flux regulated PM generator. Hamilton Sundstrand Corporation, Stephen G Mican, March 13, 2012: US08134331 (3 worldwide citation)

A method of generating and controlling power for an alternating current (AC) motor by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of the PMM, comprises the steps of: r ...

Jacek F Gieras, Jae Hyuk Oh, Mihai Huzmezan, Harshad S Sane: Electromechanical energy harvesting system. Chubb International Holdings, MH2 Technology Law Group, July 17, 2012: US08222775 (2 worldwide citation)

A method of electromechanical energy harvesting includes sensing electrical current generated by relative movement of a coil and a magnetic flux source produced by movement of a cantilevered beam in response to ambient vibration energy, determining a vibration characteristic of the ambient vibration ...

Gregory I Rozman, Jacek F Gieras, Steven J Moss: Dual generator system. Hamilton Sundstrand Corporation, Kinney & Lange P A, July 21, 2015: US09088230 (2 worldwide citation)

A dual generator system includes a main generator and an auxiliary generator. The main generator generates at least a first phase main output and a second phase main output. The auxiliary generator generates at least a first phase auxiliary output and a second phase auxiliary output, wherein the fir ...

Jacek F Gieras, Gregory I Rozman: Electromagnetic landing gear brakes. Hamilton Sundstrand Corporation, Carlson Gaskey & Olds PC, June 19, 2012: US08201774 (2 worldwide citation)

An electromagnetic control for the landing gear of an aircraft includes a hub to be fixed to a frame of an aircraft landing gear. A rotor rotates with a tire on the aircraft landing gear. Permanent magnetic disks are associated with the rotor, and interspersed with disks on the hub. Some of the disk ...

Gregory I Rozman, Jacek F Gieras: Power semiconductor module for wide temperature applications. Hamilton Sundstrand Corporation, Kinney & Lange P A, August 27, 2013: US08520389 (2 worldwide citation)

A power semiconductor module includes an insulating substrate with a conductive circuit layer attached to one side and a baseplate attached to the other side. A power semiconductor device is attached to the conductive circuit layer. The conductive circuit layer and the baseplate are formed of a mate ...

Gregory I Rozman, Matthew L Wilhide, Jacek F Gieras: Current control for an electric actuator. Hamilton Sundstrand Corporation, Kinney & Lange P A, May 20, 2014: US08729838 (2 worldwide citation)

A controller for an electric actuator includes a reference model that generates position and speed reference signals in response to a position command signal and employs a feed forward model that accounts for dynamic loading of the electric actuator. The feed forward model receives the position and ...

Jacek F Gieras, Gregory I Rozman, Andreas C Koenig: Permanent magnet brushless machine with magnetic flux regulation. Hamilton Sundstrand Corporation, Stephen G Mican, April 3, 2012: US08148867 (2 worldwide citation)

A permanent magnet machine (PMM) has a generally cylindrical permanent magnet (PM) rotor that has multiple PM rotor poles arranged around a rotor axis of rotation; and a stator with two generally cylindrical and concentric yokes, an inner yoke proximate the PM rotor with associated multiple inner po ...

Jacek F Gieras, Pei Yuan Peng, Bryan Robert Siewert, Muhidin A Lelic, Gary Copsey: Electromagnetically operated elevator door lock. Otis Elevator Company, Carlson Gaskey & Olds PC, November 2, 2010: US07823699 (1 worldwide citation)

An electromagnetic door lock assembly (30) includes a first portion (32) supported relative to hoistway doors (22) and a second portion (34) supported for movement with an elevator car (24). The first and second portions cooperate so that electromagnetic interaction between them unlocks a set of hoi ...