Mustansir H Kheraluwala

6377461, Apr 23, 2002

Nov 10, 2000

09/710237

Burhan Ozmat - Voorheesville NY
Mustansir Hussainy Kheraluwala - Niskayuna NY
Eladio Clemente Delgado - Burnt Hills NY
Charles Steven Korman - Niskayuna NY
Paul Alan McConnelee - Schenectady NY

General Electric Company - Schenectady NY

H05K 720

361704, 361697, 361699, 361719, 16510433, 174 163, 257722

A method of power electronic packaging includes a practicable and reliable method of fabricating power circuit modules and associated connections that are compatible with the standard top layer metalization of commercially available power devices. A planar single- or multi-layer membrane structure is attached to a carrier frame, and a via pattern is formed in the membrane. Power devices are aligned and attached to the planar membrane structure; a top layer interconnect structure is formed by metalizing the vias and the film; and a circuit is formed by patterning a deposited metal layer. The carrier frame is removed, and upper and lower thermal base plate sub-assemblies are attached to the power device-on-membrane structure. The planar device-on-membrane structure accommodates different types of power devices having variations in thickness. The thermal base plate sub-assemblies may include integral, high-performance heat exchangers for providing a low thermal resistance path to the ambient.

6392365, May 21, 2002

Jun 20, 2001

09/681869

Rui Zhou - Clifton Park NY
Mustansir Hussainy Kheraluwala - Schenectady NY
Louis Robert Nerone - Brecksville OH
Weizhong Tang - Boxborough MA

General Electric Company - Schenectady NY

G05F 100

315291, 315244, 315226, 315209 R, 315DIG 7

A hot restrike protection circuit provides complete shut down protection for a self-oscillating high intensity discharge lamp ballast of the type comprising a pair of complementary switching devices in a bridge configuration with a gate drive inductor in series with a second inductor, i. e. , a control inductor, at the junction between the switching devices. The hot restrike protection circuit effectively comprises a three-terminal device for coupling across the control inductor. In particular, the HRP circuit comprises a sensing network for sensing voltage across the control inductor, a breakdown network for providing a breakdown path upon reaching a predetermined restrike voltage threshold across the control inductor, and a shutdown network for shutting down operation of the ballast until the lamp is sufficiently cool for restarting, thereby protecting ballast components during hot restrike, or re-ignition, of the lamp.

7432663, Oct 7, 2008

Sep 25, 2006

11/534926

Young G. Kang - Vernon Hills IL, US
Mustansir H. Kheraluwala - Lake Zurich IL, US
Sivakumar Thangavelu - Round Lake IL, US
Markus Ziegler - Schaumburg IL, US

Osram Sylvania Inc. - Danvers MA

H05B 37/02

315209R, 315209 T, 315246

A circuit () for igniting a high intensity discharge (HID) lamp comprises input terminals (), output terminal (), a charging circuit (R,C), a transformer () having a primary winding () and a secondary winding (), a MOSFET (), and a clamping diode (D). During operation, ignitor circuit () provides a high voltage (V) for igniting an HID lamp. Ignitor circuit () provides an ignition voltage (V) having a peak magnitude that is more predictable and less prone to degradation due to the influences of parasitic components. Additionally, ignitor circuit () may be realized in a manner that is significantly more cost-effective than comparable prior art circuits.

7944149, May 17, 2011

May 12, 2009

12/464427

Afroz M. Imam - Danvers MA, US
Sivakumar Thangavelu - Billerica MA, US
Mustansir Kheraluwala - Lake Zurich IL, US

Osram Sylvania Inc. - Danvers MA

H05B 37/02

315209R, 315224, 315291

A ballast including an H-bridge type inverter for driving a lamp and a filter circuit that includes a buck inductor is disclosed. The buck inductor is a primary winding of a transformer, and a secondary winding of the transformer provides power to a controller of the ballast. The controller operates the inverter in various pre-ignition modes of operation such that prior to ignition, the open circuit voltage (OCV) (i. e. , voltage across the lamp) and buck inductor current are controlled to transfer sufficient power from the primary of the transformer to the secondary winding of the transformer to power the controller. No switches of the inverter are turned on while there is a non-zero current through the filter circuit.

8120272, Feb 21, 2012

Sep 30, 2008

12/242854

Afroz M. Imam - Peabody MA, US
Sivakumar Thangavelu - Billerica MA, US
Mustansir Kheraluwala - Lake Zurich IL, US

Osram Sylvania Inc. - Danvers MA

H05B 41/16

315291, 315224, 315247, 315307

A control circuit for a lamp. The control circuit is used in conjunction with an alternating current (AC) variable voltage power source to energize the lamp. The control circuit includes a voltage sensing component for sensing the voltage of an voltage input signal from the power source for energizing the lamp. The control circuit includes a controller configured to estimate a delay angle as a linear function of the sensed voltage. The control circuit includes an AC converter for modifying the voltage input signal according to the estimated delay angle to generate an AC voltage output signal having a constant root mean square voltage for energizing the lamp.

8614870, Dec 24, 2013

Jan 14, 2011

13/006509

Mustansir Kheraluwala - Lake Zurich IL, US
Huazhen Chai - Caledonia IL, US
Jeffrey T. Wavering - Rockford IL, US

Hamilton Sundstrand Corporation - Windsor Locks CT

H02H 3/08

361 63

A system and method for operating a semi-conductor based circuit breaker as a transient current limiter includes a semi-conductor switch that operates in a linear mode during a transient event and thereby reduces the transient current passing through the switch.

20130083574, Apr 4, 2013

Sep 29, 2011

13/248237

Frank Z. Feng - Loves Park IL, US
Mustansir Kheraluwala - Lake Zurich IL, US
Waleed M. Said - Rockford IL, US
John Huss - Roscoe IL, US

HAMILTON SUNDSTRAND CORPORATION - Windsor Locks CT

H02M 7/06
H01F 30/12

363 64, 336 12

A dual-input nine-phase autotransformer converts first and second three-phase AC inputs to a nine-phase AC output. The autotransformer includes input terminals for connection to a first three-phase AC input and a second three-phase AC input smaller than the first three-phase AC input. The autotransformer includes a first plurality of coils, a second plurality, and a third plurality of coils wound on respective phase legs of the autotransformer. The autotransformer includes a plurality of output terminals for providing a plurality of AC output voltages, and a plurality of internal terminals for connecting the first, second, and third plurality of coils in a configuration that provides a 40 phase shift in the AC outputs provided by the dual-input nine-phase autotransformer.

20130272040, Oct 17, 2013

Apr 17, 2012

13/449116

Frank Z. Feng - Loves Park IL, US
Mustansir Kheraluwala - Lake Zurich IL, US
Waleed M. Said - Rockford IL, US
John Huss - Roscoe IL, US

H02M 7/00

363 64

A dual-input 18-pulse autotransformer rectifier unit for more electric aircraft AC-DC converter uses an autotransformer with a nine-phase output to condition AC power prior to DC rectifying the AC power.