Patents by Inventor David P. Tasky
David P. Tasky 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).
-
Patent number: 10978755Abstract: A cooling system for a rechargeable energy system includes a plurality of bus bars, a cooling plate configured for cooling the plurality of bus bars and disposed in a thermally-conductive relationship with a portion of each of the plurality of bus bars, and an isolation component disposed between and in contact with the cooling plate and each of the plurality of bus bars. A rechargeable energy storage system and device are also described.Type: GrantFiled: March 25, 2019Date of Patent: April 13, 2021Assignee: GM Global Technology Operations LLCInventors: Bao Wang, Andrew K. Chandler, David P. Tasky, Karl C. Dorgan, Robert J. Heydel
-
Publication number: 20200313260Abstract: A cooling system for a rechargeable energy system includes a plurality of bus bars, a cooling plate configured for cooling the plurality of bus bars and disposed in a thermally-conductive relationship with a portion of each of the plurality of bus bars, and an isolation component disposed between and in contact with the cooling plate and each of the plurality of bus bars. A rechargeable energy storage system and device are also described.Type: ApplicationFiled: March 25, 2019Publication date: October 1, 2020Applicant: GM Global Technology Operations LLCInventors: Bao Wang, Andrew K. Chandler, David P. Tasky, Karl C. Dorgan, Robert J. Heydel
-
Patent number: 10337930Abstract: A number of variations may include a method which may include determining a temperature rise in an IGBT junction without the use of a temperature estimation or measurement device because determination may be made by first determining the power loss due to the conduction losses of the IGBT and power loss associated with switching the IGBT where these losses may be determined by utilizing the saturation voltage of the IGBT, IGBT PWM duty cycle, IGBT switching frequency, fundamental frequency along with a lookup table for the switching energies and the phase current going through the IGBT. The determined power loss may be multiplied by a measured, sensed or obtained thermal impedance from the IGBT junction. Finally, the determined temperature rise of the IGBT junction may be added to a measured, sensed or obtained temperature of the coolant in order to determine the absolute temperature of the IGBT junction.Type: GrantFiled: May 12, 2015Date of Patent: July 2, 2019Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: S. M. Nayeem Hasan, Bryan M. Ludwig, David P. Tasky
-
Publication number: 20160334280Abstract: A number of variations may include a method which may include determining a temperature rise in an IGBT junction without the use of a temperature estimation or measurement device because determination may be made by first determining the power loss due to the conduction losses of the IGBT and power loss associated with switching the IGBT where these losses may be determined by utilizing the saturation voltage of the IGBT, IGBT PWM duty cycle, IGBT switching frequency, fundamental frequency along with a lookup table for the switching energies and the phase current going through the IGBT. The determined power loss may be multiplied by a measured, sensed or obtained thermal impedance from the IGBT junction. Finally, the determined temperature rise of the IGBT junction may be added to a measured, sensed or obtained temperature of the coolant in order to determine the absolute temperature of the IGBT junction.Type: ApplicationFiled: May 12, 2015Publication date: November 17, 2016Inventors: S.M. Nayeem Hasan, Bryan M. Ludwig, David P. Tasky
-
Patent number: 9018865Abstract: A vehicle includes a rechargeable energy storage system (RESS), an electric traction motor, a traction power inverter module (TPIM), a high-voltage direct current (HVDC) bus that electrically connects the RESS to the TPIM, a passive discharge circuit connected across the positive and negative rails of the bus, and a microprocessor. The circuit includes a semiconductor switch. The microprocessor provides an output signal at a first voltage level that opens the switch and prevents discharge of the HVDC bus when the microprocessor is operating normally, and at a default second voltage level that closes the switch in the presence of a predetermined vehicle condition to thereby discharge the HVDC bus. An optocoupler may receive the output signal, and a zener diode may be in electrical parallel with an output side of the optocoupler. The switch may be an insulated gate bipolar transistor or a thyristor in different embodiments.Type: GrantFiled: April 30, 2012Date of Patent: April 28, 2015Assignee: GM Global Technology Operations LLCInventors: John W. Meyer, III, David P. Tasky, S. M. Nayeem Hasan, Bryan M. Ludwig
-
Patent number: 8867181Abstract: Methods and apparatus are provided for detecting a phase current sensor fault in a multi-phase electrical motor. The method comprises, receiving an input torque command T* and measuring a set of feedback signals of the motor including a phase current Ix for each of the phases of the motor, generating direct and quadrature command phase currents Id*, Iq* for the motor corresponding to a value of the input torque command T*, determining a total command current Is=[(Iq*)2+(Id*)2]½, generating a negative sequence current Ineg, where for three phases Ineg=(?)[Ia+(?2)Ib+(?)Ic], where ?=ej2?/3, combining Ineg and Is to provide a normalized negative sequence current Inn=Ineg/Is, comparing the normalized negative sequence current Inn to a predetermined threshold value INN* to determine the presence of a phase current sensor fault, and executing a control action when Inn>INN*.Type: GrantFiled: September 23, 2011Date of Patent: October 21, 2014Assignee: GM Global Technology Operations LLCInventors: S. M. Nayeem Hasan, Steven E. Schulz, David P. Tasky
-
Patent number: 8653841Abstract: A high-voltage discharge circuit diagnostic system includes a high voltage DC link with a positive DC link and a negative DC link, a first resistor selectably connectable between the positive DC link and the negative DC link, and a second resistor connected between the positive DC link and the negative DC link. A control module connects the first resistor between the positive DC link and the negative DC link until the high voltage DC link discharges to a first voltage after which the control module disconnects the first resistor from between the positive DC link and the negative DC link to permit continued discharge of the high voltage DC link through the second resistor to a second voltage through an elapsed time period. The control module diagnoses a fault in the second resistor based upon the first voltage, the second voltage, and the elapsed time period.Type: GrantFiled: May 4, 2012Date of Patent: February 18, 2014Assignee: GM Global Technology Operations LLCInventors: Li-Pen J. Ho, David P. Tasky
-
Patent number: 8635033Abstract: A method for monitoring electric isolation of a high voltage DC bus to detect ground isolation faults includes monitoring voltage differentials between a positive DC electric power bus and a negative DC electric power bus and a chassis ground. Electrical isolation between each of the positive and negative DC electric power buses and the chassis ground is monitored using a ratio of the voltage differentials.Type: GrantFiled: March 5, 2010Date of Patent: January 21, 2014Assignee: GM Global Technology Operations LLCInventors: S. M. Nayeem Hasan, David P. Tasky, Mohammad N. Anwar, Wei D. Wang
-
Patent number: 8600595Abstract: A vehicle includes a motor, an alternating current (AC) power bus, a power inverter module (PIM), and a controller. The PIM includes a semiconductor die assembly with semiconductor power switches arranged in electrical parallel for delivering AC power to the motor via the bus. The controller determines an operating mode of the vehicle, selects and activates a designated one of the switches during a threshold low-current state of the PIM, and selects and activates all of the switches during a high-current state of the PIM. A PIM assembly for the vehicle includes the die assembly and controller. A method for optimizing energy efficiency of the vehicle includes providing the die assembly noted above, automatically determining the operating mode, and selecting and activating one of the switches when the operating mode corresponds to the threshold low-current state, and all of the electrical switches during the threshold high-current state of the PIM.Type: GrantFiled: July 29, 2010Date of Patent: December 3, 2013Assignee: GM Global Technology Operations LLCInventors: Sean E. Gleason, Mohammad N. Anwar, David P. Tasky, Shawn Scott Hawkins, Peter J. Savagian
-
Publication number: 20130293248Abstract: A high-voltage discharge circuit diagnostic system includes a high voltage DC link with a positive DC link and a negative DC link, a first resistor selectably connectable between the positive DC link and the negative DC link, and a second resistor connected between the positive DC link and the negative DC link. A control module connects the first resistor between the positive DC link and the negative DC link until the high voltage DC link discharges to a first voltage after which the control module disconnects the first resistor from between the positive DC link and the negative DC link to permit continued discharge of the high voltage DC link through the second resistor to a second voltage through an elapsed time period. The control module diagnoses a fault in the second resistor based upon the first voltage, the second voltage, and the elapsed time period.Type: ApplicationFiled: May 4, 2012Publication date: November 7, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Li-Pen J. Ho, David P. Tasky
-
Publication number: 20130285581Abstract: A vehicle includes a rechargeable energy storage system (RESS), an electric traction motor, a traction power inverter module (TPIM), a high-voltage direct current (HVDC) bus that electrically connects the RESS to the TPIM, a passive discharge circuit connected across the positive and negative rails of the bus, and a microprocessor. The circuit includes a semiconductor switch. The microprocessor provides an output signal at a first voltage level that opens the switch and prevents discharge of the HVDC bus when the microprocessor is operating normally, and at a default second voltage level that closes the switch in the presence of a predetermined vehicle condition to thereby discharge the HVDC bus. An optocoupler may receive the output signal, and a zener diode may be in electrical parallel with an output side of the optocoupler. The switch may be an insulated gate bipolar transistor or a thyristor in different embodiments.Type: ApplicationFiled: April 30, 2012Publication date: October 31, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: John W. Meyer, III, David P. Tasky, S.M. Nayeem Hasan, Bryan M. Ludwig
-
Patent number: 8432126Abstract: A vehicle includes an energy storage system (ESS) rechargeable using electrical power from an off-board AC power supply, a traction power inverter module (TPIM), one or two motors, and a controller. The TPIM has two inverters. The controller energizes designated semiconductor switches of the TPIM and designated induction coils of the motor to boost electrical power from the AC power supply for charging the ESS when the vehicle is not running. With two motors, a contactor allows induction coils of a first motor to be connected to the switches of the first inverter as an input filter, and an additional semiconductor switch is positioned between the ESS and an output side of the switches of the second inverter. A controller charges the ESS by energizing designated semiconductor switches of the TPIM and induction coils of the motor to charge the ESS without using an onboard battery charger module.Type: GrantFiled: September 9, 2010Date of Patent: April 30, 2013Assignee: GM Global Technology Operations LLCInventors: S. M. Nayeem Hasan, David P. Tasky, Mohammad N. Anwar, Sean E. Gleason
-
Publication number: 20130077194Abstract: Methods and apparatus are provided for detecting a phase current sensor fault in a multi-phase electrical motor. The method comprises, receiving an input torque command T* and measuring a set of feedback signals of the motor including a phase current Ix for each of the phases of the motor, generating direct and quadrature command phase currents Id*, Iq* for the motor corresponding to a value of the input torque command T*, determining a total command current Is=[(Iq*)2+(Id*)2]½, generating a negative sequence current Ineg, where for three phases Ineg=(?)[Ia+(?2)Ib+(?)Ic], where ?=ej2?/3, combining Ineg and Is to provide a normalized negative sequence current Inn=Ineg/Is, comparing the normalized negative sequence current Inn to a predetermined threshold value INN* to determine the presence of a phase current sensor fault, and executing a control action when Inn>INN*.Type: ApplicationFiled: September 23, 2011Publication date: March 28, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: S.M. N. HASAN, STEVEN E. SCHULZ, DAVID P. TASKY
-
Patent number: 8378603Abstract: Methods and systems for controlling an electric motor are provided. The electric motor includes at least one winding. A winding current flowing through the at least one winding is monitored. The winding current has an oscillating component and an offset component. The offset component of the winding current is isolated from the oscillating component of the winding current. The electric motor is controlled based on the offset component of the winding current.Type: GrantFiled: January 14, 2010Date of Patent: February 19, 2013Assignee: GM Global Technology Operations LLCInventors: S. M. N. Hasan, Brian A. Welchko, David P. Tasky, Justin O. Nielsen, Silva Hiti
-
Patent number: 8188616Abstract: A vehicle includes a high-voltage (HV) energy storage system (ESS), an HV power bus, a DC-DC power converter electrically connected to the HV power bus, an HV bus connector, a low voltage (LV) battery power bus, and a pair of LV bus connectors. The vehicle includes a vehicle module electrically connected to the HV and LV bus connectors, an LV power bus electrically connected to the DC-DC power converter and to the module, and a controller. The controller has an algorithm that controls the converter to power the module via one of the LV bus connectors during a transient LV condition. The converter and a method of controlling the same are also provided, with the method including determining the LV condition, powering the vehicle module via one of the LV bus connectors during the transient LV condition, and powering the module via the other LV connector otherwise.Type: GrantFiled: March 26, 2010Date of Patent: May 29, 2012Assignee: GM Global Technology Operations LLCInventors: Erik Charles Nordstrom, Mohammad N. Anwar, David P. Tasky, Alan G. Holmes, Mehrdad Teimorzadeh
-
Publication number: 20120062176Abstract: A vehicle includes an energy storage system (ESS) rechargeable using electrical power from an off-board AC power supply, a traction power inverter module (TPIM), one or two motors, and a controller. The TPIM has two inverters. The controller energizes designated semiconductor switches of the TPIM and designated induction coils of the motor to boost electrical power from the AC power supply for charging the ESS when the vehicle is not running. With two motors, a contactor allows induction coils of a first motor to be connected to the switches of the first inverter as an input filter, and an additional semiconductor switch is positioned between the ESS and an output side of the switches of the second inverter. A controller charges the ESS by energizing designated semiconductor switches of the TPIM and induction coils of the motor to charge the ESS without using an onboard battery charger module.Type: ApplicationFiled: September 9, 2010Publication date: March 15, 2012Applicant: GM GLOBBAL TECHNOLOGY OPERATIONS, INC.Inventors: S.M. Nayeem Hasan, David P. Tasky, Mohammad N. Anwar, Sean E. Gleason
-
Publication number: 20120029741Abstract: A vehicle includes a motor, an alternating current (AC) power bus, a power inverter module (PIM), and a controller. The PIM includes a semiconductor die assembly with semiconductor power switches arranged in electrical parallel for delivering AC power to the motor via the bus. The controller determines an operating mode of the vehicle, selects and activates a designated one of the switches during a threshold low-current state of the PIM, and selects and activates all of the switches during a high-current state of the PIM. A PIM assembly for the vehicle includes the die assembly and controller. A method for optimizing energy efficiency of the vehicle includes providing the die assembly noted above, automatically determining the operating mode, and selecting and activating one of the switches when the operating mode corresponds to the threshold low-current state, and all of the electrical switches during the threshold high-current state of the PIM.Type: ApplicationFiled: July 29, 2010Publication date: February 2, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Sean E Gleason, Mohammad N Anwar, David P. Tasky, Shawn Scott Hawkins, Peter J. Savagian
-
Publication number: 20110233995Abstract: A vehicle includes a high-voltage (HV) energy storage system (ESS), an HV power bus, a DC-DC power converter electrically connected to the HV power bus, an HV bus connector, a low voltage (LV) battery power bus, and a pair of LV bus connectors. The vehicle includes a vehicle module electrically connected to the HV and LV bus connectors, an LV power bus electrically connected to the DC-DC power converter and to the module, and a controller. The controller has an algorithm that controls the converter to power the module via one of the LV bus connectors during a transient LV condition. The converter and a method of controlling the same are also provided, with the method including determining the LV condition, powering the vehicle module via one of the LV bus connectors during the transient LV condition, and powering the module via the other LV connector otherwise.Type: ApplicationFiled: March 26, 2010Publication date: September 29, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Erik Charles Nordstrom, Mohammad N. Anwar, David P. Tasky, Alan G. Holmes, Mehrdad Teimorzadeh
-
Publication number: 20110218745Abstract: A method for monitoring electric isolation of a high voltage DC bus to detect ground isolation faults includes monitoring voltage differentials between a positive DC electric power bus and a negative DC electric power bus and a chassis ground. Electrical isolation between each of the positive and negative DC electric power buses and the chassis ground is monitored using a ratio of the voltage differentials.Type: ApplicationFiled: March 5, 2010Publication date: September 8, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: S.M. Nayeem Hasan, David P. Tasky, Mohammad N. Anwar, Wei D. Wang
-
Publication number: 20110169438Abstract: Methods and systems for controlling an electric motor are provided. The electric motor includes at least one winding. A winding current flowing through the at least one winding is monitored. The winding current has an oscillating component and an offset component. The offset component of the winding current is isolated from the oscillating component of the winding current. The electric motor is controlled based on the offset component of the winding current.Type: ApplicationFiled: January 14, 2010Publication date: July 14, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: S.M. N. HASAN, BRIAN A. WELCHKO, DAVID P. TASKY, JUSTIN O. NIELSEN, SILVA HITI