Patents by Inventor Mustansir Kheraluwala
Mustansir Kheraluwala has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10186370Abstract: A transformer-inductor assembly includes a core, a primary winding, and a secondary winding. The primary winding is wrapped about the core. The secondary winding is wrapped about the primary winding. One or more ferromagnetic bars per phase are arranged between the secondary winding and the primary winding to control the inductance to the transformer-inductor assembly secondary winding. An electrical system including the transformer-inductor assembly and method of transforming voltage of alternating current using the transformer-inductor assembly are also described.Type: GrantFiled: July 3, 2017Date of Patent: January 22, 2019Assignee: Hamilton Sundstrand CorporationInventors: Jacek F. Gieras, Gregory I. Rozman, Mustansir Kheraluwala
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Publication number: 20190006096Abstract: A transformer-inductor assembly includes a core, a primary winding, and a secondary winding. The primary winding is wrapped about the core. The secondary winding is wrapped about the primary winding. One or more ferromagnetic bars per phase are arranged between the secondary winding and the primary winding to control the inductance to the transformer-inductor assembly secondary winding. An electrical system including the transformer-inductor assembly and method of transforming voltage of alternating current using the transformer-inductor assembly are also described.Type: ApplicationFiled: July 3, 2017Publication date: January 3, 2019Inventors: Jacek F. Gieras, Gregory I. Rozman, Mustansir Kheraluwala
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Publication number: 20180337529Abstract: A transient voltage protection circuit. The transient voltage protection circuit including a resistor with a source-side terminal and a device-side terminal, a first stage with a first protection element connected to the resistor device-side terminal, a second stage with a second protection element connected to the resistor source-side terminal, and a ground terminal connected to the resistor source-side terminal through the second stage and to the resistor device-side terminal of the resistor through the first stage.Type: ApplicationFiled: May 16, 2017Publication date: November 22, 2018Inventors: Sean P. O'Donnell, Adrian E. Vandergrift, David W. Lefavour, Brennan Fox, Mustansir Kheraluwala
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Publication number: 20180323608Abstract: A solid state power controller, SSPC, having an input to receive supply current and an output for providing output current to a load in response to connection to the power supply, the solid state power controller further comprising at least one solid state switch and a controller to limit the power dissipated in the solid state power switch based on a measured voltage across the solid state switch and a predetermined power dissipation threshold for the SSPC to adjust the output current or voltage control signal of the solid state switch such that the actual power dissipation of the SSPC does not exceed the threshold.Type: ApplicationFiled: March 8, 2018Publication date: November 8, 2018Inventors: Virgilio VALDIVIA GUERRERO, Fabien DUBOIS, Laura ALBIOL-TENDILLO, Mustansir KHERALUWALA
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Patent number: 10003186Abstract: A variable-speed constant-frequency (VSCF) power converter includes a generator control operable to regulate an output voltage of a variable frequency generator at a variable frequency. The VSCF power generator also includes an inverter control operable to regulate a VSCF output voltage at a point-of-regulation at a constant frequency, where the generator control and the inverter control independently control a main line contactor of the point-of-regulation to provide redundant fault protection for an aircraft use.Type: GrantFiled: June 15, 2016Date of Patent: June 19, 2018Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Carl A. Wagner, Mustansir Kheraluwala
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Publication number: 20170365993Abstract: A variable-speed constant-frequency (VSCF) power converter includes a generator control operable to regulate an output voltage of a variable frequency generator at a variable frequency. The VSCF power generator also includes an inverter control operable to regulate a VSCF output voltage at a point-of-regulation at a constant frequency, where the generator control and the inverter control independently control a main line contactor of the point-of-regulation to provide redundant fault protection for an aircraft use.Type: ApplicationFiled: June 15, 2016Publication date: December 21, 2017Inventors: Carl A. Wagner, Mustansir Kheraluwala
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Patent number: 9812243Abstract: A transformer assembly includes a housing with a sealed housing interior, a transformer disposed within the housing interior and having a core with windings wrapped about the core, and a condenser mounted to the housing. The condenser is in fluid communication with the housing interior. A surface of the windings bounds a coolant channel extending between the windings and the condenser to convey coolant of a first phase to the condenser and receive coolant of a second phase from the condenser.Type: GrantFiled: April 16, 2015Date of Patent: November 7, 2017Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Adam M. White, Mustansir Kheraluwala, Frank Z. Feng, Kris H. Campbell, Charles Shepard
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Patent number: 9590521Abstract: A method of converting power includes receiving alternating current (AC) at the first phase leg set of a power conversion system having first and second phase legs sets connected by direct current (DC) leads. The first phase leg set rectifies the received AC power into DC power by switching outer switches of the first phase leg set into an off state. The DC lead conveys the DC power from the first phase leg set to the second phase leg set. The second phase leg set inverts the DC power into AC power.Type: GrantFiled: July 28, 2014Date of Patent: March 7, 2017Assignee: Hamilton Sundstrand CorporationInventors: Adam M. White, Mustansir Kheraluwala
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Patent number: 9555711Abstract: A power converter includes a first set of transistors electrically connected in series, a second set of transistors electrically connected in series, and an AC link. The second set of transistors is electrically connected in parallel with the first set of transistors to form an H-bridge. The AC link is electrically connected between the first and second sets of transistors. A plurality of H-bridges are connected in parallel and a three-wire DC bus is electrically connected to the H-bridges.Type: GrantFiled: June 3, 2014Date of Patent: January 31, 2017Assignee: Hamilton Sundstrand CorporationInventors: Adam M. White, Mustansir Kheraluwala, Richard A. Himmelmann
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Publication number: 20160307685Abstract: A transformer assembly includes a housing with a sealed housing interior, a transformer disposed within the housing interior and having a core with windings wrapped about the core, and a condenser mounted to the housing. The condenser is in fluid communication with the housing interior. A surface of the windings bounds a coolant channel extending between the windings and the condenser to convey coolant of a first phase to the condenser and receive coolant of a second phase from the condenser.Type: ApplicationFiled: April 16, 2015Publication date: October 20, 2016Inventors: Adam M. White, Mustansir Kheraluwala, Frank Z. Feng, Kris H. Campbell, Charles Shepard
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Patent number: 9435263Abstract: A thermal stress reduction method includes ramping an electric power generator to start an aircraft engine, for a time period associated with the aircraft engine start sequence toggling a three-level inverter switch array to a three-level pulse width modulation mode, determining if a first time interval in the three-level pulse width modulation mode exceeded a predetermined three-level pulse width modulation mode interval, in response to the first time interval exceeding the three-level pulse width modulation mode interval, toggling the three-level inverter switch array to a two-level pulse width modulation mode, determining if a second time interval in the two-level pulse width modulation mode exceeded a predetermined two-level pulse width modulation mode interval and in response to the second time interval exceeding the two-level pulse width modulation mode interval, toggling the three-level inverter switch array to the three-level pulse width modulation mode.Type: GrantFiled: May 20, 2014Date of Patent: September 6, 2016Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Huazhen Chai, Adam M. White, Mustansir Kheraluwala
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Patent number: 9435264Abstract: A thermal stress reduction method includes ramping an electric power generator to start an aircraft engine, for a time period associated with the aircraft engine start sequence toggling a three-level inverter switch array to a three-level pulse width modulation mode, determining if a first time interval in the three-level pulse width modulation mode exceeded a predetermined three-level pulse width modulation mode interval, in response to the first time interval exceeding the three-level pulse width modulation mode interval, toggling the three-level inverter switch array to a two-level pulse width modulation mode, determining if a second time interval in the two-level pulse width modulation mode exceeded a predetermined two-level pulse width modulation mode interval and in response to the second time interval exceeding the two-level pulse width modulation mode interval, toggling the three-level inverter switch array to the three-level pulse width modulation mode.Type: GrantFiled: May 20, 2014Date of Patent: September 6, 2016Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Huazhen Chai, Adam M. White, Mustansir Kheraluwala
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Patent number: 9270168Abstract: A multi-level power converter system includes a multi-level power converter configured to synthesize at least three direct current (DC) voltages into an alternating current (AC) output voltage, and includes a plurality of transistors. A controller generates pulse-width modulation (PWM) signals used to control a state of the plurality of transistors of the multi-level converter by comparing first and second carrier signals to a reference signals, wherein a period of the first and second carrier signals is randomly varied from a nominal period.Type: GrantFiled: March 15, 2013Date of Patent: February 23, 2016Assignee: Hamilton Sundstrand CorporationInventors: Adam Michael White, Mustansir Kheraluwala, Steven A. Davidson
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Publication number: 20160028321Abstract: A method of converting power includes receiving alternating current (AC) at the first phase leg set of a power conversion system having first and second phase legs sets connected by direct current (DC) leads. The first phase leg set rectifies the received AC power into DC power by switching outer switches of the first phase leg set into an off state. The DC lead conveys the DC power from the first phase leg set to the second phase leg set. The second phase leg set inverts the DC power into AC power.Type: ApplicationFiled: July 28, 2014Publication date: January 28, 2016Inventors: Adam M. White, Mustansir Kheraluwala
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Patent number: 9236812Abstract: A universal AC to DC converter may be configured to convert alternating current (AC) to direct current (DC), such as for use in aerospace applications. The disclosure relates to a single universal power electronic converter capable of converting an AC input voltage, such as a line to neutral input voltage of either 115 Vrms or 230 Vrms nominal to 28 V DC.Type: GrantFiled: January 7, 2014Date of Patent: January 12, 2016Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Adam Michael White, Waleed M. Said, Mustansir Kheraluwala
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Publication number: 20150343911Abstract: A power converter includes a first set of transistors electrically connected in series, a second set of transistors electrically connected in series, and an AC link. The second set of transistors is electrically connected in parallel with the first set of transistors to form an H-bridge. The AC link is electrically connected between the first and second sets of transistors. A plurality of H-bridges are connected in parallel and a three-wire DC bus is electrically connected to the H-bridges.Type: ApplicationFiled: June 3, 2014Publication date: December 3, 2015Applicant: HAMILTON SUNDSTRAND CORPORATIONInventors: Adam M. White, Mustansir Kheraluwala, Richard A. Himmelmann
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Publication number: 20150349694Abstract: A motor controller has a direct current input, inverter, common mode filter, differential mode filter, and an output terminal. The direct current input is electrically connected to the common mode filter. The common mode filter is electrically connected to the inverter. The inverter is electrically connected in to the differential mode filter. The differential mode filter is electrically connected to the output terminal. The common mode filter is configured to attenuate common mode noise and is located on the input side of the inverter. The differential mode filter attenuates differential mode noise and is located on the output side of the inverter. A motor system having a motor controller, a direct current source, a feeder cable, and an electric motor.Type: ApplicationFiled: June 3, 2014Publication date: December 3, 2015Applicant: Hamilton Sundstrand CorporationInventors: Frank Z. Feng, Dwight D. Schmitt, Mustansir Kheraluwala
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Patent number: 9197138Abstract: A three phase step-up autotransformer construction is discussed herein. The passive 12-pulse AC-DC converter offers simplicity, high reliability and low cost solution to AC-DC power conversion. The autotransformer is a component of the passive 12-pulse AC-DC converter. The autotransformer converts three-phase AC power into six-phase AC power. With appropriate vector design, the autotransformer may be configured to draw a near sinusoidal 12-pulse current waveform from the three-phase voltage source. The six-phase output may be configured to drive a rectifier (non-linear) load.Type: GrantFiled: January 23, 2014Date of Patent: November 24, 2015Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Frank Z. Feng, Mustansir Kheraluwala, Waleed M. Said
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Publication number: 20150194905Abstract: A universal AC to DC converter may be configured to convert alternating current (AC) to direct current (DC), such as for use in aerospace applications. The disclosure relates to a single universal power electronic converter capable of converting an AC input voltage, such as a line to neutral input voltage of either 115 Vrms or 230 Vrms nominal to 28 V DC.Type: ApplicationFiled: January 7, 2014Publication date: July 9, 2015Applicant: Hamilton Sundstrand CorporationInventors: Adam Michael White, Waleed M. Said, Mustansir Kheraluwala
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Publication number: 20150097506Abstract: A three phase step-up autotransformer construction is discussed herein. The passive 12-pulse AC-DC converter offers simplicity, high reliability and low cost solution to AC-DC power conversion. The autotransformer is a component of the passive 12-pulse AC-DC converter. The autotransformer converts three-phase AC power into six-phase AC power. With appropriate vector design, the autotransformer may be configured to draw a near sinusoidal 12-pulse current waveform from the three-phase voltage source. The six-phase output may be configured to drive a rectifier (non-linear) load.Type: ApplicationFiled: January 23, 2014Publication date: April 9, 2015Applicant: HAMILTON SUNDSTRAND CORPORATIONInventors: FRANK Z. FENG, MUSTANSIR KHERALUWALA, WALEED M. SAID