Patents by Inventor Lateef A. Kajouke
Lateef A. Kajouke 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: 9365122Abstract: A power line quality conditioning system for a vehicle includes an onboard rechargeable direct current (DC) energy storage system and an onboard electrical system coupled to the energy storage system. The energy storage system provides DC energy to drive an electric traction motor of the vehicle. The electrical system operates in a charging mode such that alternating current (AC) energy from a power grid external to the vehicle is converted to DC energy to charge the DC energy storage system. The electrical system also operates in a vehicle-to-grid power conditioning mode such that DC energy from the DC energy storage system is converted to AC energy to condition an AC voltage of the power grid.Type: GrantFiled: September 20, 2011Date of Patent: June 14, 2016Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Lateef A. Kajouke, Milun Perisic
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Patent number: 8878495Abstract: Systems and methods are provided for an electrical system. The electrical system, for example, includes a first load, an interface configured to receive a voltage from a voltage source, and a controller configured to receive the voltage through the interface and to provide a voltage and current to the first load. The controller may be further configured to, receive information on a second load electrically connected to the voltage source, determine an amount of reactive current to return to the voltage source such that a current drawn by the electrical system and the second load from the voltage source is substantially real, and provide the determined reactive current to the voltage source.Type: GrantFiled: August 31, 2011Date of Patent: November 4, 2014Assignee: GM Global Technology Operations LLCInventors: Milun Perisic, Christopher P. Lawrence, Ray M. Ransom, Lateef A. Kajouke
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Patent number: 8860379Abstract: A system and method of discharging a bus capacitor of a bidirectional matrix converter of a vehicle are presented here. The method begins by electrically shorting the AC interface of the converter after an AC energy source is disconnected from the AC interface. The method continues by arranging a plurality of switching elements of a second energy conversion module into a discharge configuration to establish an electrical current path from a first terminal of an isolation module, through an inductive element, and to a second terminal of the isolation module. The method also modulates a plurality of switching elements of a first energy conversion module, while maintaining the discharge configuration of the second energy conversion module, to at least partially discharge a DC bus capacitor.Type: GrantFiled: April 20, 2011Date of Patent: October 14, 2014Assignee: GM Global Technology Operations LLCInventors: Lateef A. Kajouke, Milun Perisic, Ray M. Ransom
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Patent number: 8829858Abstract: Systems and methods are provided for initiating a charging system. The method, for example, may include, but is not limited to, providing, by the charging system, an incrementally increasing voltage to a battery up to a first predetermined threshold while the energy conversion module has a zero-percent duty cycle, providing, by the charging system, an incrementally increasing voltage to the battery from an initial voltage level of the battery up to a peak voltage of a voltage source while the energy conversion module has a zero-percent duty cycle, and providing, by the charging system, an incrementally increasing voltage to the battery by incrementally increasing the duty cycle of the energy conversion module.Type: GrantFiled: May 31, 2011Date of Patent: September 9, 2014Assignee: GM Global Technology Operations LLCInventors: Ray M. Ransom, Milun Perisic, Lateef A. Kajouke
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Patent number: 8760124Abstract: Systems and methods are provided for initiating a charging system. The method, for example, may include, but is not limited to, providing, by the charging system, an incrementally increasing voltage to a battery up to a first predetermined threshold while the energy conversion module has a zero-percent duty cycle, providing, by the charging system, an incrementally increasing voltage to the battery from an initial voltage level of the battery up to a peak voltage of a voltage source while the energy conversion module has a zero-percent duty cycle, and providing, by the charging system, an incrementally increasing voltage to the battery by incrementally increasing the duty cycle of the energy conversion module.Type: GrantFiled: May 31, 2011Date of Patent: June 24, 2014Assignee: GM Global Technology Operations LLCInventors: Ray M. Ransom, Milun Perisic, Lateef A. Kajouke
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Patent number: 8614564Abstract: Systems and methods are provided for an electrical system. The electrical system includes a load, an interface configured to receive a voltage from a voltage source, and a controller configured to receive the voltage from the voltage source through the interface and to provide a voltage and current to the load. Wherein, when the controller is in a constant voltage mode, the controller provides a constant voltage to the load, when the controller is in a constant current mode, the controller provides a constant current to the load, and when the controller is in a constant power mode, the controller provides a constant power to the load.Type: GrantFiled: November 18, 2010Date of Patent: December 24, 2013Assignee: GM Global Technology Operations LLSInventors: Milun Perisic, Lateef A. Kajouke, Ray M. Ransom
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Patent number: 8599577Abstract: Systems and methods are provided for delivering energy using an energy conversion module. An exemplary method for delivering energy from an input interface to an output interface using an energy conversion module coupled between the input interface and the output interface comprises the steps of determining an input voltage reference for the input interface based on a desired output voltage and a measured voltage at the output interface, determining a duty cycle control value based on a ratio of the input voltage reference and the measured voltage, operating one or more switching elements of the energy conversion module to deliver energy from the input interface to the output interface with a duty cycle influenced by the duty cycle control value.Type: GrantFiled: November 8, 2010Date of Patent: December 3, 2013Assignee: GM Global Technology Operations LLCInventors: Lateef A. Kajouke, Milun Perisic, Ray M. Ransom
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Patent number: 8587962Abstract: Systems and methods are provided for delivering energy from an input interface to an output interface. An electrical system includes an input interface, an output interface, an energy conversion module between the input interface and the output interface, an inductive element between the input interface and the energy conversion module, and a control module. The control module determines a compensated duty cycle control value for operating the energy conversion module to produce a desired voltage at the output interface and operates the energy conversion module to deliver energy to the output interface with a duty cycle that is influenced by the compensated duty cycle control value. The compensated duty cycle control value is influenced by the current through the inductive element and accounts for voltage across the switching elements of the energy conversion module.Type: GrantFiled: November 8, 2010Date of Patent: November 19, 2013Assignee: GM Global Technology Operations LLCInventors: Milun Perisic, Ray M. Ransom, Lateef A. Kajouke
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Patent number: 8467197Abstract: Systems and methods are provided for delivering energy from an input interface to an output interface. An electrical system includes an input interface, an output interface, an energy conversion module coupled between the input interface and the output interface, and a control module. The control module determines a duty cycle control value for operating the energy conversion module to produce a desired voltage at the output interface. The control module determines an input power error at the input interface and adjusts the duty cycle control value in a manner that is influenced by the input power error, resulting in a compensated duty cycle control value. The control module operates switching elements of the energy conversion module to deliver energy to the output interface with a duty cycle that is influenced by the compensated duty cycle control value.Type: GrantFiled: November 8, 2010Date of Patent: June 18, 2013Assignee: GM Global Technology Operations LLCInventors: Milun Perisic, Ray M. Ransom, Lateef A. Kajouke
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Patent number: 8466658Abstract: Systems and methods are provided for bi-directional energy delivery. A charging system comprises a first bi-directional conversion module, a second bi-directional conversion module, and an isolation module coupled between the first bi-directional conversion module and the second bi-directional conversion module. The isolation module provides galvanic isolation between the first bi-directional conversion module and the second bi-directional conversion module.Type: GrantFiled: August 5, 2009Date of Patent: June 18, 2013Assignee: GM Global Technology Operations LLCInventor: Lateef A. Kajouke
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Patent number: 8462528Abstract: Systems and methods are provided for delivering energy using an energy conversion module that includes one or more switching elements. An exemplary electrical system comprises a DC interface, an AC interface, an isolation module, a first conversion module between the DC interface and the isolation module, and a second conversion module between the AC interface and the isolation module. A control module is configured to operate the first conversion module to provide an injection current to the second conversion module to reduce a magnitude of a current through a switching element of the second conversion module before opening the switching element.Type: GrantFiled: July 19, 2010Date of Patent: June 11, 2013Assignee: GM Global Technology Operations LLCInventors: Lateef A. Kajouke, Milun Perisic, Ray M. Ransom
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Patent number: 8410758Abstract: Systems and methods are provided for bi-directional energy delivery. A charging system comprises a first bi-directional conversion module, a second bi-directional conversion module, and an isolation module coupled between the first bi-directional conversion module and the second bi-directional conversion module. The isolation module provides galvanic isolation between the first bi-directional conversion module and the second bi-directional conversion module.Type: GrantFiled: August 5, 2009Date of Patent: April 2, 2013Assignee: GM Global Technology Operations LLCInventor: Lateef A. Kajouke
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Publication number: 20130069424Abstract: A power line quality conditioning system for a vehicle includes an onboard rechargeable direct current (DC) energy storage system and an onboard electrical system coupled to the energy storage system. The energy storage system provides DC energy to drive an electric traction motor of the vehicle. The electrical system operates in a charging mode such that alternating current (AC) energy from a power grid external to the vehicle is converted to DC energy to charge the DC energy storage system. The electrical system also operates in a vehicle-to-grid power conditioning mode such that DC energy from the DC energy storage system is converted to AC energy to condition an AC voltage of the power grid.Type: ApplicationFiled: September 20, 2011Publication date: March 21, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: LATEEF A. KAJOUKE, MILUN PERISIC
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Publication number: 20130049703Abstract: Systems and methods are provided for an electrical system. The electrical system, for example, includes a first load, an interface configured to receive a voltage from a voltage source, and a controller configured to receive the voltage through the interface and to provide a voltage and current to the first load. The controller may be further configured to, receive information on a second load electrically connected to the voltage source, determine an amount of reactive current to return to the voltage source such that a current drawn by the electrical system and the second load from the voltage source is substantially real, and provide the determined reactive current to the voltage source.Type: ApplicationFiled: August 31, 2011Publication date: February 28, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: MILUN PERISIC, CHRISTOPHER P. LAWRENCE, RAY M. RANSOM, LATEEF A. KAJOUKE
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Patent number: 8350523Abstract: Systems and methods are provided for operating a charging system with galvanic isolation adapted for multiple operating modes. A vehicle charging system comprises a DC interface, an AC interface, a first conversion module coupled to the DC interface, and a second conversion module coupled to the AC interface. An isolation module is coupled between the first conversion module and the second conversion module. The isolation module comprises a transformer and a switching element coupled between the transformer and the second conversion module. The transformer and the switching element are cooperatively configured for a plurality of operating modes, wherein each operating mode of the plurality of operating modes corresponds to a respective turns ratio of the transformer.Type: GrantFiled: August 5, 2009Date of Patent: January 8, 2013Assignee: GM Global Technology Operations LLCInventors: Lateef A. Kajouke, Milun Perisic, Ray M. Ransom
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Publication number: 20120306454Abstract: Systems and methods are provided for initiating a charging system. The method, for example, may include, but is not limited to, providing, by the charging system, an incrementally increasing voltage to a battery up to a first predetermined threshold while the energy conversion module has a zero-percent duty cycle, providing, by the charging system, an incrementally increasing voltage to the battery from an initial voltage level of the battery up to a peak voltage of a voltage source while the energy conversion module has a zero-percent duty cycle, and providing, by the charging system, an incrementally increasing voltage to the battery by incrementally increasing the duty cycle of the energy conversion module.Type: ApplicationFiled: May 31, 2011Publication date: December 6, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Ray M. RANSOM, Milun PERISIC, Lateef A. KAJOUKE
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Publication number: 20120268078Abstract: A system and method of discharging a bus capacitor of a bidirectional matrix converter of a vehicle are presented here. The method begins by electrically shorting the AC interface of the converter after an AC energy source is disconnected from the AC interface. The method continues by arranging a plurality of switching elements of a second energy conversion module into a discharge configuration to establish an electrical current path from a first terminal of an isolation module, through an inductive element, and to a second terminal of the isolation module. The method also modulates a plurality of switching elements of a first energy conversion module, while maintaining the discharge configuration of the second energy conversion module, to at least partially discharge a DC bus capacitor.Type: ApplicationFiled: April 20, 2011Publication date: October 25, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Lateef A. KAJOUKE, Milun PERISIC, Ray M. RANSOM
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Patent number: 8288887Abstract: Systems and methods are provided for delivering current using a matrix converter in a vehicle. An electrical system comprises an AC interface, a first conversion module coupled to the AC interface, an inductive element coupled between the AC interface and the first conversion module, and a control module coupled to the first conversion module. The control module is configured to operate the first conversion module in a bidirectional operating mode to commutate current bidirectionally. When a magnitude of the current through the inductive element is greater than a first threshold value, the control module operates the conversion module in a unidirectional operating mode, wherein current is commutated unidirectionally.Type: GrantFiled: November 19, 2009Date of Patent: October 16, 2012Assignee: GM Global Technology Operations LLCInventors: Ray M. Ransom, Lateef A. Kajouke, Milun Perisic
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Patent number: 8289033Abstract: Systems and methods are provided for detecting a resonance on a bus coupled to an inverter module. A method involves generating a first signal on the bus with a first frequency and sweeping the first signal from the first frequency to a second frequency. A second signal, which may be influenced by a characteristic of a component coupled to the bus, is obtained from the bus during the sweep of the first signal from the first frequency to the second frequency. The method further involves determining a resonant frequency based on the first signal and the second signal and updating the inverter module such that the resonant frequency is not used as a switching frequency for the inverter module.Type: GrantFiled: January 23, 2009Date of Patent: October 16, 2012Assignee: GM Global Technology Operations LLCInventor: Lateef A. Kajouke
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Publication number: 20120126755Abstract: Systems and methods are provided for an electrical system. The electrical system includes a load, an interface configured to receive a voltage from a voltage source, and a controller configured to receive the voltage from the voltage source through the interface and to provide a voltage and current to the load.Type: ApplicationFiled: November 18, 2010Publication date: May 24, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: MILUN PERISIC, LATEEF A. KAJOUKE, RAY M. RANSOM