Patents by Inventor Daniel Luedtke
Daniel Luedtke 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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Publication number: 20190016935Abstract: Adhesive composition including an elastomeric silicone-based copolymer selected from the group consisting of urea-based silicone copolymers, oxamide-based silicone copolymers, amide-based silicone copolymers, urethane-based silicone copolymers and mixtures thereof; and greater than 0% by weight and no more than 20% by weight of MQ resin. In certain embodiments, the adhesive compositions includes less than 10% by weight of MQ resin. In some illustrative embodiments, the adhesive composition is a pressure-sensitive adhesive. In certain illustrative embodiments, the pressure sensitive adhesive is optically clear, self-wetting to the end-use substrate, and stretch releasable. In certain such embodiments, the adhesive article exhibits a 180° PEEL ADHESION to a glass substrate no greater than about 500 N/dm after aging for seven days at 85° C. The pressure sensitive adhesive compositions may be used to form adhesive articles and adhesive assemblies.Type: ApplicationFiled: December 22, 2016Publication date: January 17, 2019Inventors: DAVID S. HAYS, RICHARD G. HANSEN, JAMES P. DiZIO, DANIEL A. LUEDTKE, JOAN M. NOYOLA, SCOTT M. TAPIO
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Patent number: 10033326Abstract: A vehicle having at least two electric machines includes an oil circulation path that circulates oil through the electric machines. A controller commands the electric machines to fulfill torque demands. The controller utilizes the oil temperature in the oil circulation path to control the commanded torque output by the electric machines. In the event of a failure or fault in an oil temperature sensor, the controller estimates the oil temperature from the temperature of coils within at least one of the electric machines. The estimated oil temperature is utilized instead of the sensed oil temperature to control the torque outputs to satisfy torque demands.Type: GrantFiled: May 20, 2016Date of Patent: July 24, 2018Assignee: Ford Global Technologies, LLCInventors: Balakrishna Rao, Rimma Isayeva, Daniel Luedtke
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Patent number: 9929688Abstract: A vehicle comprises an electric machine configured with at least one controller issuing torque commands with the use of a voltage bus. The controller may be configured to respond to a torque requests based on multiple vehicle system inputs including vehicle speed, position of the accelerator pedal and brake pedal, and various other vehicle data. The controller may respond to a torque request that exceeds a threshold value by issuing torque commands for the electric machine based on a speed of the electric machine and a voltage on the bus. Based on the speed of the electric machine and voltage on the bus, the controller may issue a constant torque output by the electric machine as the speed and voltage vary. Calculating a ratio using speed of the electric machine to voltage on the bus to determine torque capability may result as a constant torque when the ratio is constant.Type: GrantFiled: September 7, 2012Date of Patent: March 27, 2018Assignee: Ford Global Technologies, LLCInventor: Daniel Luedtke
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Patent number: 9893657Abstract: A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. A controller operates an inverter in either six-step mode or PWM mode depending upon motor speed, motor torque, and the inverter input voltage. A method of selecting the operating mode may determine a transition threshold based on the ratio of rotor speed to inverter input voltage, reducing the approximation error associated with multi-dimensional lookup tables. When the speed and voltage vary while maintaining a constant ratio and constant torque, the transition threshold does not change. Consequently, the controller remains in the same mode.Type: GrantFiled: September 7, 2012Date of Patent: February 13, 2018Assignee: Ford Global Technologies, LLCInventor: Daniel Luedtke
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Patent number: 9735720Abstract: A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. In response to a torque request, a controller issues commands to an inverter calculated to cause the motor to produce the requested torque. A method of operating the inverter may determine the commands based on the ratio of rotor speed to inverter input voltage, reducing the approximation error associated with multi-dimensional lookup tables. When the speed and voltage vary while maintaining a constant ratio and constant torque request, the issued commands produce a winding current in the electrical machine with constant direct and quadrature components.Type: GrantFiled: September 7, 2012Date of Patent: August 15, 2017Assignee: Ford Global Technologies, LLCInventors: Daniel Luedtke, Michael W. Degner
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Patent number: 9724997Abstract: A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. In response to a torque request, a controller issues commands to an inverter calculated to cause the motor to produce the requested torque at the current temperature. A method adjusts the direct component of the winding current such that the requested torque is delivered efficiently. For a given rotor speed, bus voltage, and torque, the direct component increases as the temperature increases.Type: GrantFiled: September 7, 2012Date of Patent: August 8, 2017Assignee: Ford Global Technologies, LLCInventor: Daniel Luedtke
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Publication number: 20160268955Abstract: A vehicle having at least two electric machines includes an oil circulation path that circulates oil through the electric machines. A controller commands the electric machines to fulfill torque demands. The controller utilizes the oil temperature in the oil circulation path to control the commanded torque output by the electric machines. In the event of a failure or fault in an oil temperature sensor, the controller estimates the oil temperature from the temperature of coils within at least one of the electric machines. The estimated oil temperature is utilized instead of the sensed oil temperature to control the torque outputs to satisfy torque demands.Type: ApplicationFiled: May 20, 2016Publication date: September 15, 2016Inventors: Balakrishna RAO, Rimma ISAYEVA, Daniel LUEDTKE
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Patent number: 9352656Abstract: A vehicle having at least one electric machine capable of propelling the vehicle is provided. An oil circulation path is provided that circulates oil through the electric machines. A controller commands the electric machines to fulfill torque demands. The controller utilizes the oil temperature in the oil circulation path in order to control the commanded torque output by the electric machines. In the event of a failure or fault in the oil temperature sensors, the controller estimates the oil temperature from the temperature of coils within the electric machine. The estimated oil temperature is utilized instead of the sensed oil temperature to control the torque outputs to maintain torque demands.Type: GrantFiled: August 31, 2012Date of Patent: May 31, 2016Assignee: Ford Global Technologies, LLCInventors: Balakrishna Rao, Rimma Isayeva, Daniel Luedtke
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Publication number: 20140070738Abstract: A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. In response to a torque request, a controller issues commands to an inverter calculated to cause the motor to produce the requested torque. A method of operating the inverter may determine the commands based on the ratio of rotor speed to inverter input voltage, reducing the approximation error associated with multi-dimensional lookup tables. When the speed and voltage vary while maintaining a constant ratio and constant torque request, the issued commands produce a winding current in the electrical machine with constant direct and quadrature components.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Daniel Luedtke, Michael W. Degner
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Publication number: 20140070739Abstract: A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. In response to a torque request, a controller issues commands to an inverter calculated to cause the motor to produce the requested torque at the current temperature. A method adjusts the direct component of the winding current such that the requested torque is delivered efficiently. For a given rotor speed, bus voltage, and torque, the direct component increases as the temperature increases.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventor: Daniel Luedtke
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Publication number: 20140070735Abstract: A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. A controller operates an inverter in either six-step mode or PWM mode depending upon motor speed, motor torque, and the inverter input voltage. A method of selecting the operating mode may determine a transition threshold based on the ratio of rotor speed to inverter input voltage, reducing the approximation error associated with multi-dimensional lookup tables. When the speed and voltage vary while maintaining a constant ratio and constant torque, the transition threshold does not change. Consequently, the controller remains in the same mode.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventor: Daniel Luedtke
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Publication number: 20140070741Abstract: A vehicle comprises an electric machine configured with at least one controller issuing torque commands with the use of a voltage bus. The controller may be configured to respond to a torque requests based on multiple vehicle system inputs including vehicle speed, position of the accelerator pedal and brake pedal, and various other vehicle data. The controller may respond to a torque request that exceeds a threshold value by issuing torque commands for the electric machine based on a speed of the electric machine and a voltage on the bus. Based on the speed of the electric machine and voltage on the bus, the controller may issue a constant torque output by the electric machine as the speed and voltage vary. Calculating a ratio using speed of the electric machine to voltage on the bus to determine torque capability may result as a constant torque when the ratio is constant.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventor: Daniel Luedtke
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Publication number: 20140062184Abstract: A vehicle having at least one electric machine capable of propelling the vehicle is provided. An oil circulation path is provided that circulates oil through the electric machines. A controller commands the electric machines to fulfill torque demands. The controller utilizes the oil temperature in the oil circulation path in order to control the commanded torque output by the electric machines. In the event of a failure or fault in the oil temperature sensors, the controller estimates the oil temperature from the temperature of coils within the electric machine. The estimated oil temperature is utilized instead of the sensed oil temperature to control the torque outputs to maintain torque demands.Type: ApplicationFiled: August 31, 2012Publication date: March 6, 2014Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Balakrishna Rao, Rimma Isayeva, Daniel Luedtke
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Patent number: 7979171Abstract: A method of controlling a vehicle including a permanent magnet (PM) synchronous motor is provided. The motor is controlled based on direct-axis (d-axis) and quadrature-axis (q-axis) current commands. The method includes estimating permanent magnet flux linkage based on q-axis voltage and electrical angular speed, and estimating permanent magnet temperature based on permanent magnet flux linkage and the temperature coefficient of the permanent magnet. The vehicle is controlled based on the estimated permanent magnet temperature.Type: GrantFiled: September 21, 2010Date of Patent: July 12, 2011Assignee: Ford Global Technologies, LLCInventors: Ji Wu, Franco Leonardi, Feng Liang, Michael W. Degner, Daniel Luedtke
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Publication number: 20110144843Abstract: A method of controlling a vehicle including a permanent magnet (PM) synchronous motor is provided. The motor is controlled based on direct-axis (d-axis) and quadrature-axis (q-axis) current commands. The method includes estimating permanent magnet flux linkage based on q-axis voltage and electrical angular speed, and estimating permanent magnet temperature based on permanent magnet flux linkage and the temperature coefficient of the permanent magnet. The vehicle is controlled based on the estimated permanent magnet temperature.Type: ApplicationFiled: September 21, 2010Publication date: June 16, 2011Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Ji Wu, Franco Leonardi, Feng Liang, Michael W. Degner, Daniel Luedtke