Patents by Inventor Kerry E. Grand
Kerry E. Grand 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: 10725440Abstract: Embodiments include techniques for estimating unknown or missing values for parameters of a motor based on high-level motor information and using the estimated parametric values in generating an executable model for modeling the behavior of the motor. An aspect of the techniques involves assumptions used to establish the predetermined parametric values that are applied to the algorithm for deriving estimates of the unknown parametric values for the motor. The estimated parametric values may then be used in the executable model of the motor to enable development and simulation of a plant (e.g., a closed loop system) including a plant model having a dynamic controller model and a lumped parameter model of a modeling environment of a technical computing environment executing on a data processing system. The simulation of the plant loop can be sufficient to test the dynamic (e.g., feedback-based) controller within a closed loop system, e.g., test motion control of a motorized vehicle seat.Type: GrantFiled: February 27, 2017Date of Patent: July 28, 2020Assignee: The MathWorks, Inc.Inventors: Kerry E. Grand, Yang Xu, Ebrahim M. Mestchian
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Patent number: 8314595Abstract: In a hybrid electric motor vehicle , a power supply system for storing and supplying electrical power includes a motor-generator located onboard the vehicle, driveably connected to the vehicle wheels and producing AC electric power, an energy storage device for alternately storing and discharging electric power, an inverter coupled to the motor-generator and the energy storage device for converting alternating current produced by the motor-generator to direct current transmitted to the energy storage device, and for converting direct current stored in the energy storage device to alternating current transmitted to the motor-generator, an off board source of AC electric power located external to the vehicle, and a charger coupled to said electric power source and the energy storage device for supplying DC electric power to the energy storage device from said AC electric power source.Type: GrantFiled: June 9, 2009Date of Patent: November 20, 2012Assignee: Ford Global Technologies, LLCInventors: Kerry E. Grand, Venkatapathi R. Nallapa, Fazal U. Syed, Ming L. Kuang
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Publication number: 20090250277Abstract: In a hybrid electric motor vehicle , a power supply system for storing and supplying electrical power includes a motor-generator located onboard the vehicle, driveably connected to the vehicle wheels and producing AC electric power, an energy storage device for alternately storing and discharging electric power, an inverter coupled to the motor-generator and the energy storage device for converting alternating current produced by the motor-generator to direct current transmitted to the energy storage device, and for converting direct current stored in the energy storage device to alternating current transmitted to the motor-generator, an off board source of AC electric power located external to the vehicle, and a charger coupled to said electric power source and the energy storage device for supplying DC electric power to the energy storage device from said AC electric power source.Type: ApplicationFiled: June 9, 2009Publication date: October 8, 2009Inventors: Kerry E. Grand, Venkatapathi R. Nallapa, Fazal U. Syed, Ming L. Kuang
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Patent number: 7567061Abstract: In a hybrid electric motor vehicle, a power supply system for storing and supplying electrical power includes a motor-generator located onboard the vehicle, driveably connected to the vehicle wheels and producing AC electric power, an energy storage device for alternately storing and discharging electric power, an inverter coupled to the motor-generator and the energy storage device for converting alternating current produced by the motor-generator to direct current transmitted to the energy storage device, and for converting direct current stored in the energy storage device to alternating current transmitted to the motor-generator, a source of AC electric power located external to the vehicle, and a charger coupled to said electric power source and the energy storage device for supplying DC electric power to the energy storage device from said AC electric power source.Type: GrantFiled: January 12, 2007Date of Patent: July 28, 2009Assignee: Ford Global Technologies, LLCInventors: Kerry E. Grand, Venkatapathi Raju Nallapa, Fazal U. Syed, Ming L. Kuang
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Patent number: 7545659Abstract: Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system can comprise an electronic power inverter, such as one usable with an uninterruptible power supply. Cycles of signals indicative of the AC grid power and the AC load power are counted and compared to obtain a cycle error value. If the cycle error value exceeds a first value to indicate that AC load side frequency is too high or too low, then compensation is performed to change the AC load side frequency to be closer to the AC grid side frequency. If the cycle error value falls below a second value to indicate that the AC grid side frequency and AC load side frequency are sufficiently close to one another, then the compensation is deactivated.Type: GrantFiled: March 24, 2008Date of Patent: June 9, 2009Assignee: Continental Automotive Systems US, Inc.Inventors: Duo Deng, Kenneth J. Farkas, Anil Tuladhar, Kerry E. Grand
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Publication number: 20080169138Abstract: In a hybrid electric motor vehicle, a power supply system for storing and supplying electrical power includes a motor-generator located onboard the vehicle, driveably connected to the vehicle wheels and producing AC electric power, an energy storage device for alternately storing and discharging electric power, an inverter coupled to the motor-generator and the energy storage device for converting alternating current produced by the motor-generator to direct current transmitted to the energy storage device, and for converting direct current stored in the energy storage device to alternating current transmitted to the motor-generator, a source of AC electric power located external to the vehicle, and a charger coupled to said electric power source and the energy storage device for supplying DC electric power to the energy storage device from said AC electric power source.Type: ApplicationFiled: January 12, 2007Publication date: July 17, 2008Inventors: Kerry E. Grand, Venkatapathi Raju Nallapa, Fazal U. Syed, Ming L. Kuang
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Publication number: 20080165555Abstract: Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system can comprise an electronic power inverter, such as one usable with an uninterruptible power supply. Cycles of signals indicative of the AC grid power and the AC load power are counted and compared to obtain a cycle error value. If the cycle error value exceeds a first value to indicate that AC load side frequency is too high or too low, then compensation is performed to change the AC load side frequency to be closer to the AC grid side frequency. If the cycle error value falls below a second value to indicate that the AC grid side frequency and AC load side frequency are sufficiently close to one another, then the compensation is deactivated.Type: ApplicationFiled: March 24, 2008Publication date: July 10, 2008Applicant: CONTINENTAL AUTOMOTIVE SYSTEMS US, INC.Inventors: Duo Deng, Kenneth J. Farkas, Anil Tuladhar, Kerry E. Grand
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Patent number: 7362600Abstract: Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system includes an electronic power inverter, such as one usable with an uninterruptible power supply. Cycles of signals indicative of the AC grid power and the AC load power are counted and compared to obtain a cycle error value. If the cycle error value exceeds a first value to indicate that AC load side frequency is too high or too low, then compensation is performed to change the AC load side frequency to be closer to the AC grid side frequency. If the cycle error value falls below a second value to indicate that the AC grid side frequency and AC load side frequency are sufficiently close to one another, then the compensation is deactivated.Type: GrantFiled: October 1, 2004Date of Patent: April 22, 2008Assignee: Continental Automotive Systems US, Inc.Inventors: Duo Deng, Kenneth J. Farkas, Anil Tuladhar, Kerry E. Grand
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Patent number: 7256566Abstract: The maximum power point (MPP) of a photovoltaic array that can be coupled to power inverter is determined. A capacitor on a DC-bus side of the inverter is used as a load from which I-V characteristics of the photovoltaic array can be generated. The photovoltaic array is connected to the capacitor, which has been previously discharged by a bleed down resistor. Short circuit current, open circuit voltage, and values of current and voltage as the capacitor charges are determined and used to generate I-V characteristics of the photovoltaic array. From the I-V characteristics, the MPP can be calculated.Type: GrantFiled: April 30, 2004Date of Patent: August 14, 2007Assignee: Ballard Power Systems CorporationInventors: Vijay Bhavaraju, Kerry E. Grand, Anil Tuladhar
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Patent number: 7190145Abstract: A method and apparatus for improving speed measurement quality in systems having multi-pole machines is taught. The method compensates for pole misalignment by computing speed based upon moving average techniques. In one embodiment, a moving average speed averaged over a complete interval of rotation is determined, based upon measurements of one or more magnetic pole position sensors for magnetic pole location. In another embodiment, a time interval between two poles is averaged over one or more rotational periods, and the average time interval is used to determine the moving average speed. Computation of the moving average speed reduces errors in speed measurements due to pole misalignment and may provide for smaller control adjustment times for controlling motor speed variability. In one embodiment, the speed measurement system includes a multi-pole rotor, and a controller having a capture timer and a buffer.Type: GrantFiled: December 30, 2002Date of Patent: March 13, 2007Assignee: Ballard Power Systems CorporationInventors: Kerry E. Grand, Richard J. Hampo, Yifan Zhao
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Patent number: 7158395Abstract: A power system employs an outer voltage feedback loop and an inner current feedback loop to control a power converter, such as a DC to AC inverter for transferring electrical power between a power source, for example a photovoltaic array, and a load, for example a power grid. The outer loop accommodates variations in the output of the power source, for example accommodating anomalies in IV characteristics such as IV droop characteristic associated with photovoltaic cells. The outer loop may employ a first control regime or a second control regime, for example, dependent on whether a DC bus voltage or power is smaller than a value corresponding to measurement resolution or expected noise.Type: GrantFiled: April 30, 2004Date of Patent: January 2, 2007Assignee: Ballard Power Systems CorporationInventors: Duo Deng, Anil Tuladhar, Kenneth J. Farkas, Kerry E. Grand
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Patent number: 6900643Abstract: A system including a current sensor to sense a current provided by an electronic power converter, the current sensor includes an output; an overcurrent detection circuit with an input coupled to an output of the current sensor; and a logic control circuit configurable to maintain the current provided by the electronic power converter in response to the sensed current having a short circuit magnitude, the logic control circuit including an input coupled to an output of the overcurrent detection circuit and at least one output coupled to at least one switch of the electronic power converter.Type: GrantFiled: August 6, 2003Date of Patent: May 31, 2005Assignee: Ballard Power Systems CorporationInventors: Duo Deng, Kerry E. Grand, Steven J. Kowalec
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Publication number: 20040264225Abstract: The maximum power point (MPP) of a photovoltaic array that can be coupled to power inverter is determined. A capacitor on a DC-bus side of the inverter is used as a load from which I-V characteristics of the photovoltaic array can be generated. The photovoltaic array is connected to the capacitor, which has been previously discharged by a bleed down resistor. Short circuit current, open circuit voltage, and values of current and voltage as the capacitor charges are determined and used to generate I-V characteristics of the photovoltaic array. From the I-V characteristics, the MPP can be calculated.Type: ApplicationFiled: April 30, 2004Publication date: December 30, 2004Applicant: Ballard Power Systems CorporationInventors: Vijay Bhavaraju, Kerry E. Grand, Anil Tuladhar
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Patent number: 6815925Abstract: Systems and methods for controlling and/or calculating the torque for a field oriented induction motor operating at a given stator frequency. The systems and methods include calculating the torque using a first algorithm when the motor is at or below a first predetermined stator frequency, a second algorithm when the motor is at or above a second predetermined stator frequency, and a third algorithm when the motor is between the first predetermined stator frequency and the second predetermined stator frequency.Type: GrantFiled: November 12, 2002Date of Patent: November 9, 2004Assignee: Ballard Power Systems CorporationInventors: Li Chen, Xingyi Xu, Vinod Reddy, Richard J. Hampo, Kerry E. Grand
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Publication number: 20040090205Abstract: Systems and methods for controlling and/or calculating the torque for a field oriented induction motor operating at a given stator frequency. The systems and methods include calculating the torque using a first algorithm when the motor is at or below a first predetermined stator frequency, a second algorithm when the motor is at or above a second predetermined stator frequency, and a third algorithm when the motor is between the first predetermined stator frequency and the second predetermined stator frequency.Type: ApplicationFiled: November 12, 2002Publication date: May 13, 2004Inventors: Li Chen, Xingyi Xu, Vinod Reddy, Richard J. Hampo, Kerry E. Grand
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Publication number: 20030164692Abstract: A method and apparatus for improving the speed measurement quality in systems having multi-pole machines is taught. The method compensates for pole misalignment by moving average techniques.Type: ApplicationFiled: December 30, 2002Publication date: September 4, 2003Applicant: Ballard Power Systems CorporationInventors: Kerry E. Grand, Richard J. Hampo, Yifan Zhao