Patents by Inventor Mehdi Abolhassani
Mehdi Abolhassani 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: 11919416Abstract: In one embodiment, an EV charging system includes: a plurality of first converters to receive and convert grid power at a distribution grid voltage to at least one second voltage; a high frequency transformer coupled to the first converters to receive the at least one second voltage and output at least one high frequency AC voltage; and a plurality of port rectifiers coupled to a plurality of secondary windings of the high frequency transformer, each of the port rectifiers comprising a unidirectional AC-DC converter to receive and convert the at least one high frequency AC voltage to a DC voltage. At least some of the port rectifiers may be coupled in series to provide at least one of a charging current or a charging voltage to at least one dispenser to which at least one EV is to couple.Type: GrantFiled: May 26, 2022Date of Patent: March 5, 2024Assignee: Resilient Power Systems, Inc.Inventors: Josh Keister, Lyle T. Keister, Mehdi Abolhassani
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Publication number: 20230256853Abstract: In one embodiment, an EV charging system includes: a plurality of first converters to receive and convert grid power at a distribution grid voltage to at least one second voltage; a high frequency transformer coupled to the first converters to receive the at least one second voltage and output at least one high frequency AC voltage; and a plurality of port rectifiers coupled to a plurality of secondary windings of the high frequency transformer, each of the port rectifiers comprising a unidirectional AC-DC converter to receive and convert the at least one high frequency AC voltage to a DC voltage. At least some of the port rectifiers may be coupled in series to provide at least one of a charging current or a charging voltage to at least one dispenser to which at least one EV is to couple.Type: ApplicationFiled: April 6, 2023Publication date: August 17, 2023Inventors: Josh Keister, Lyle T. Keister, Mehdi Abolhassani
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Patent number: 11648844Abstract: In one embodiment, an EV charging system includes: a plurality of first converters to receive and convert grid power at a distribution grid voltage to at least one second voltage; a high frequency transformer coupled to the first converters to receive the at least one second voltage and output at least one high frequency AC voltage; and a plurality of port rectifiers coupled to a plurality of secondary windings of the high frequency transformer, each of the port rectifiers comprising a unidirectional AC-DC converter to receive and convert the at least one high frequency AC voltage to a DC voltage. At least some of the port rectifiers may be coupled in series to provide at least one of a charging current or a charging voltage to at least one dispenser to which at least one EV is to couple.Type: GrantFiled: February 21, 2022Date of Patent: May 16, 2023Assignee: Resilient Power Systems, Inc.Inventors: Josh Keister, Lyle T. Keister, Mehdi Abolhassani
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Publication number: 20230121403Abstract: In an embodiment, a power module may include: a plurality of first stages, each having an H-bridge to receive an incoming AC voltage at a first frequency and rectify the incoming AC voltage to a DC voltage; a plurality of DC buses, each to receive the DC voltage from one of the plurality of first stages; a plurality of second stages, each coupled to one of the plurality of DC buses to receive the DC voltage and output a second AC voltage at a second frequency; and a hardware configuration system having fixed components and optional components to provide different configurations for the power module.Type: ApplicationFiled: December 16, 2022Publication date: April 20, 2023Inventors: Mehdi Abolhassani, Lyle T. Keister, Josh Keister
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Publication number: 20230045130Abstract: In an embodiment, a power module may include: a plurality of first stages, each having an H-bridge to receive an incoming AC voltage at a first frequency and rectify the incoming AC voltage to a DC voltage; a plurality of DC buses, each to receive the DC voltage from one of the plurality of first stages; a plurality of second stages, each coupled to one of the plurality of DC buses to receive the DC voltage and output a second AC voltage at a second frequency; and a hardware configuration system having fixed components and optional components to provide different configurations for the power module.Type: ApplicationFiled: August 4, 2021Publication date: February 9, 2023Inventors: Mehdi Abolhassani, Lyle T. Keister, Josh Keister
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Patent number: 11557957Abstract: In an embodiment, a power module may include: a plurality of first stages, each having an H-bridge to receive an incoming AC voltage at a first frequency and rectify the incoming AC voltage to a DC voltage; a plurality of DC buses, each to receive the DC voltage from one of the plurality of first stages; a plurality of second stages, each coupled to one of the plurality of DC buses to receive the DC voltage and output a second AC voltage at a second frequency; and a hardware configuration system having fixed components and optional components to provide different configurations for the power module.Type: GrantFiled: August 4, 2021Date of Patent: January 17, 2023Assignee: Resilient Power Systems, Inc.Inventors: Mehdi Abolhassani, Lyle T. Keister, Josh Keister
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Patent number: 11509233Abstract: In one embodiment, an apparatus includes a surge voltage blocker circuit to couple between a distribution grid network and a grid-side power converter of a power conversion system. The surge voltage blocker circuit may include a plurality of series-coupled AC switch circuits, each including: a bidirectional switch formed of a first power transistor and a second power transistor; and a transient voltage suppression device coupled in parallel with the bidirectional switch.Type: GrantFiled: April 25, 2022Date of Patent: November 22, 2022Assignee: Resilient Power Systems, Inc.Inventors: Josh Keister, Lyle T. Keister, Mehdi Abolhassani
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Publication number: 20220348101Abstract: In one embodiment, an EV charging system includes: a plurality of first converters to receive and convert grid power at a distribution grid voltage to at least one second voltage; a high frequency transformer coupled to the first converters to receive the at least one second voltage and output at least one high frequency AC voltage; and a plurality of port rectifiers coupled to a plurality of secondary windings of the high frequency transformer, each of the port rectifiers comprising a unidirectional AC-DC converter to receive and convert the at least one high frequency AC voltage to a DC voltage. At least some of the port rectifiers may be coupled in series to provide at least one of a charging current or a charging voltage to at least one dispenser to which at least one EV is to couple.Type: ApplicationFiled: May 26, 2022Publication date: November 3, 2022Inventors: Josh Keister, Lyle T. Keister, Mehdi Abolhassani
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Publication number: 20220348096Abstract: In one aspect, an electric vehicle (EV) charging system includes: a plurality of first converters to receive grid power at a distribution grid voltage and convert the distribution grid voltage to at least one second voltage; at least one high frequency transformer coupled to the plurality of first converters to receive the second voltage and electrically isolate a plurality of second converters. The EV charging system may further include the plurality of second converters coupled to the output of the at least one high frequency transformer to receive and convert the at least one second voltage to a third DC voltage. At least some of the plurality of second converters are to couple to one or more EV charging dispensers to provide the third DC voltage as a charging voltage or a charging current.Type: ApplicationFiled: February 23, 2022Publication date: November 3, 2022Inventors: Josh Keister, Lyle T. Keister, Mehdi Abolhassani
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Publication number: 20220348100Abstract: In one embodiment, an EV charging system includes: a plurality of first converters to receive and convert grid power at a distribution grid voltage to at least one second voltage; a high frequency transformer coupled to the first converters to receive the at least one second voltage and output at least one high frequency AC voltage; and a plurality of port rectifiers coupled to a plurality of secondary windings of the high frequency transformer, each of the port rectifiers comprising a unidirectional AC-DC converter to receive and convert the at least one high frequency AC voltage to a DC voltage. At least some of the port rectifiers may be coupled in series to provide at least one of a charging current or a charging voltage to at least one dispenser to which at least one EV is to couple.Type: ApplicationFiled: February 21, 2022Publication date: November 3, 2022Inventors: Josh Keister, Lyle T. Keister, Mehdi Abolhassani
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Patent number: 11370314Abstract: In one embodiment, a system includes: an enclosure; a plurality of first converters adapted within the enclosure to receive grid power at a distribution grid voltage and convert the distribution grid voltage to at least one second voltage; at least one high frequency transformer adapted within the enclosure and coupled to the plurality of first converters to receive the at least one second voltage; a plurality of second converters adapted within the enclosure and coupled to an output of the at least one high frequency transformer to receive the at least one second voltage and convert the at least one second voltage to a third voltage; and a dielectric fluid adapted within the enclosure to provide dielectric isolation.Type: GrantFiled: December 30, 2021Date of Patent: June 28, 2022Assignee: Resilient Power Systems, Inc.Inventors: Josh Keister, Mehdi Abolhassani, Lyle T. Keister
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Patent number: 11292352Abstract: In one aspect, an electric vehicle (EV) charging system includes: a plurality of first converters to receive grid power at a distribution grid voltage and convert the distribution grid voltage to at least one second voltage; at least one high frequency transformer coupled to the plurality of first converters to receive the second voltage and electrically isolate a plurality of second converters. The EV charging system may further include the plurality of second converters coupled to the output of the at least one high frequency transformer to receive and convert the at least one second voltage to a third DC voltage. At least some of the plurality of second converters are to couple to one or more EV charging dispensers to provide the third DC voltage as a charging voltage or a charging current.Type: GrantFiled: April 30, 2021Date of Patent: April 5, 2022Assignee: Resilient Power Systems, Inc.Inventors: Josh Keister, Lyle T. Keister, Mehdi Abolhassani
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Patent number: 10184534Abstract: A frictionless electromagnetic braking system utilizes linear alternators which are controlled by a power electronics converter interface to capture the car's kinetic energy and generate braking force on the wheel. The alternators are engaged by driver or operator input.Type: GrantFiled: August 2, 2016Date of Patent: January 22, 2019Inventor: Mehdi Abolhassani
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Patent number: 9609777Abstract: In one embodiment, a power cell chamber for a drive system includes moveable and fixed portions. The moveable portion includes a rectifier stage to rectify an input signal received from a secondary winding of a transformer to provide a rectified signal and an inverter stage having a plurality of switching devices to receive a DC signal and output an AC signal. This moveable portion can be slidably adapted within a cabinet of the drive system. In turn, the fixed portion includes a DC link having at least one capacitor to receive the rectified signal and provide the DC signal to the inverter stage.Type: GrantFiled: December 21, 2015Date of Patent: March 28, 2017Assignee: TECO-Westinghouse Motor CompanyInventors: Enrique Ledezma, Thomas Keister, Mehdi Abolhassani, Ryan Edwards, Alex Skorcz, Randall Pipho, Srinivas Satumahanti
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Publication number: 20170037915Abstract: A frictionless electromagnetic braking system utilizes linear alternators which are controlled by a power electronics converter interface to capture the car's kinetic energy and generate braking force on the wheel. The alternators are engaged by means of driver or operator input.Type: ApplicationFiled: August 2, 2016Publication date: February 9, 2017Inventor: Mehdi Abolhassani
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Publication number: 20160105986Abstract: In one embodiment, a power cell chamber for a drive system includes moveable and fixed portions. The moveable portion includes a rectifier stage to rectify an input signal received from a secondary winding of a transformer to provide a rectified signal and an inverter stage having a plurality of switching devices to receive a DC signal and output an AC signal. This moveable portion can be slidably adapted within a cabinet of the drive system. In turn, the fixed portion includes a DC link having at least one capacitor to receive the rectified signal and provide the DC signal to the inverter stage.Type: ApplicationFiled: December 21, 2015Publication date: April 14, 2016Inventors: Enrique Ledezma, Thomas Keister, Mehdi Abolhassani, Ryan Edwards, Alex Skorcz, Randall Pipho, Srinivas Satumahanti
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Patent number: 9220179Abstract: In one embodiment, a power cell chamber for a drive system includes moveable and fixed portions. The moveable portion includes a rectifier stage to rectify an input signal received from a secondary winding of a transformer to provide a rectified signal and an inverter stage having a plurality of switching devices to receive a DC signal and output an AC signal. This moveable portion can be slidably adapted within a cabinet of the drive system. In turn, the fixed portion includes a DC link having at least one capacitor to receive the rectified signal and provide the DC signal to the inverter stage.Type: GrantFiled: January 31, 2012Date of Patent: December 22, 2015Assignee: TECO-Westinghouse Motor CompanyInventors: Enrique Ledezma, Thomas Keister, Mehdi Abolhassani, Ryan Edwards, Alex Skorcz, Randall Pipho, Srinivas Satumahanti
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Patent number: 8711530Abstract: In one embodiment, a power cell chamber for a drive system includes moveable and fixed portions. The moveable portion includes a rectifier stage to rectify an input signal received from a secondary winding of a transformer to provide a rectified signal and an inverter stage having a plurality of switching devices to receive a DC signal and output an AC signal. This moveable portion can be slidably adapted within a cabinet of the drive system. In turn, the fixed portion includes a DC link having at least one capacitor to receive the rectified signal and provide the DC signal to the inverter stage.Type: GrantFiled: July 28, 2010Date of Patent: April 29, 2014Assignee: TECO-Westinghouse Motor CompanyInventors: Enrique Ledezma, Thomas Keister, Mehdi Abolhassani, Ryan Edwards, Alex Skorcz, Randall Pipho, Srinivas Satumahanti
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Patent number: 8601190Abstract: A control system may be provided for a controlled system such as a drive or inverter system. To provide for control in such system, a master controller may be present to receive, via a second communication protocol from a cabinet controller coupled to the master controller, status information of a controlled device, generate control information based at least in part on the status information, and transmit the control information to the cabinet controller via the second communication protocol. In turn, the cabinet controller can generate and communicate a control packet to the controlled device via a first communication protocol. This packet can be interleaved within another message communicated from the cabinet controller to the device.Type: GrantFiled: June 24, 2011Date of Patent: December 3, 2013Assignee: TECO-Westinghouse Motor CompanyInventors: Randall Pipho, Ryan Edwards, Mehdi Abolhassani, Enrique Ledezma, Alex Skorcz, Thomas Keister
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Patent number: RE46827Abstract: A power tool that includes a housing, a motor, a planetary transmission, a first bearing and a second bearing. The motor is disposed in the housing and includes an output shaft. The planetary transmission has a sun gear, a plurality of first planet gears, a first ring gear and a carrier. The sun gear is driven by the output shaft. The first planet gears are driven by the sun gear and have teeth that are meshingly engaged to teeth of the first ring gear. The carrier includes a rear carrier plate and a front carrier plate between which the first and second planet gears are received. The rear carrier plate includes a first bearing aperture. The first bearing is received in the first bearing aperture and is configured to support the output shaft. The second bearing is received onto the rear carrier plate to support the carrier relative to the housing.Type: GrantFiled: June 5, 2015Date of Patent: May 8, 2018Assignee: Black & Decker Inc.Inventors: Scott Rudolph, Sankarshan Murthy, Daniel Puzio, Qiang Zhang, Aris Cleanthous, Mehdi Abolhassani, Ren H. Wang, David Tomayko