Patents by Inventor Michael C. Muir
Michael C. Muir 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: 11594921Abstract: A rotor assembly for an electric machine, e.g., of an electrified powertrain, includes a rotor having inner and outer diameter surfaces, and a rotor shaft connected to and surrounded by the rotor. The rotor has equally-spaced rotor magnetic poles each having a quadrature-axis (“q-axis”) and a pair of direct-axes (“d-axes”). At each of magnetic pole of the rotor, the rotor defines at least three arcuate notches, including a center notch bisected by the q-axis and a pair of additional arcuate notches symmetrically flanking the center notch. The rotor may include embedded permanent magnets, which may be arranged in a dual V-shaped configuration. Each additional notch may be positioned within a sweep of a top-layer opening angle of the magnets. The center notch and/or the pair of additional notches may define tangentially-continuous fillets which smoothly transition the notch into the outer diameter surface.Type: GrantFiled: December 11, 2019Date of Patent: February 28, 2023Assignee: GM Global Technology Operations LLCInventors: Peng Zhang, Song He, Michael C. Muir
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Publication number: 20220368184Abstract: An electric machine may include a rotor having a notch at each pole wherein each notch is skewed by some mechanical angle. Notches may fluidly couple one end of the rotor to the other end of the rotor and provide pumping functionality for fluid therein.Type: ApplicationFiled: May 11, 2021Publication date: November 17, 2022Inventors: Song He, Peng Zhang, Michael C. Muir, Yew Sum Leong
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Publication number: 20210184520Abstract: A rotor assembly for an electric machine, e.g., of an electrified powertrain, includes a rotor having inner and outer diameter surfaces, and a rotor shaft connected to and surrounded by the rotor. The rotor has equally-spaced rotor magnetic poles each having a quadrature-axis (“q-axis”) and a pair of direct-axes (“d-axes”). At each of magnetic pole of the rotor, the rotor defines at least three arcuate notches, including a center notch bisected by the q-axis and a pair of additional arcuate notches symmetrically flanking the center notch. The rotor may include embedded permanent magnets, which may be arranged in a dual V-shaped configuration. Each additional notch may be positioned within a sweep of a top-layer opening angle of the magnets. The center notch and/or the pair of additional notches may define tangentially-continuous fillets which smoothly transition the notch into the outer diameter surface.Type: ApplicationFiled: December 11, 2019Publication date: June 17, 2021Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Peng Zhang, Song He, Michael C. Muir
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Patent number: 10886802Abstract: A rotor for an electric machine comprises a rotor core that defines a rotor slot having a central portion and an end portion. The end portion has a maximum width that is greater than a maximum width of the central portion immediately adjacent the end portion. A perimeter of the rotor slot at the end portion includes a plurality of segments extending between a first extremity at the maximum width of the end portion and a second extremity at the maximum width of the end portion. The plurality of segments include segments with different radii that decrease in magnitude from the center axis to the first extremity, and from the center axis to the second extremity.Type: GrantFiled: February 13, 2018Date of Patent: January 5, 2021Assignee: GM Global Technology Operations LLCInventors: Jihyun Kim, Michael C. Muir, Yew Sum Leong
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Publication number: 20190252935Abstract: A rotor for an electric machine comprises a rotor core that defines a rotor slot having a central portion and an end portion. The end portion has a maximum width that is greater than a maximum width of the central portion immediately adjacent the end portion. A perimeter of the rotor slot at the end portion includes a plurality of segments extending between a first extremity at the maximum width of the end portion and a second extremity at the maximum width of the end portion. The plurality of segments include segments with different radii that decrease in magnitude from the center axis to the first extremity, and from the center axis to the second extremity.Type: ApplicationFiled: February 13, 2018Publication date: August 15, 2019Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Jihyun Kim, Michael C. Muir, Yew Sum Leong
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Patent number: 9669820Abstract: A method of prioritizing power output of first and second power-sources in a vehicle includes identifying, via a controller communicating with a satellite, the vehicle's position on a specific road course. The method also includes receiving a request for total amount of power from both power-sources and determining first power-source power and available second power-source target maximum power based on the vehicle position. The method also includes determining, based on the vehicle position, a minimum energy reserve of a source configured to energize the second power-source and available second power-source power based on the determined reserve. The method also includes subtracting the first power-source power from the requested total amount of power to determine a requested second power-source power. Furthermore, the method includes comparing the available and the requested second power-source power and generating the smaller power value to minimize the time for the vehicle to traverse the road course.Type: GrantFiled: April 13, 2016Date of Patent: June 6, 2017Assignee: GM Global Technology Operations LLCInventors: Brendan M. Conlon, Shawn H. Swales, Michael C. Muir, Aniket P. Kothari, Michael V. Woon
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Patent number: 8541924Abstract: An insulator assembly for a stator assembly of an electric machine includes an annular ring attached to a stator core, and a plurality of coil separators supported by the annular ring and extending from the annular ring axially along a longitudinal axis. One of the coil separators is disposed between each adjacent pair of the coils to prevent contact between adjacent coils having a different electrical phase. The coil separators are slideably inserted between the adjacent pairs of coils, with the annular ring positioning and supporting the coil separators.Type: GrantFiled: January 26, 2011Date of Patent: September 24, 2013Assignee: GM Global Technology Operations LLCInventors: Ryan Van Tiem, Edward L. Kaiser, John C. Morgante, Paul F. Turnbull, Michael C. Muir
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Publication number: 20120288380Abstract: A pump-motor assembly includes a motor housing, a motor disposed substantially within the motor housing, and a pumping element driven by the motor. A pressurized region is filled with a fluid pressurized by the pumping element, and a fluid passage is in fluid communication with the pressurized region and the motor housing. Fluid flows from the pressurized region to the motor housing and at least partially submerges the motor.Type: ApplicationFiled: May 10, 2011Publication date: November 15, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Edward L. Kaiser, Michael P. Fannin, Anthony P. Tata, Michael C. Muir, Ryan Van Tiem, Peter Bostwick
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Publication number: 20120187797Abstract: An insulator assembly for a stator assembly of an electric machine includes an annular ring attached to a stator core, and a plurality of coil separators supported by the annular ring and extending from the annular ring axially along a longitudinal axis. One of the coil separators is disposed between each adjacent pair of the coils to prevent contact between adjacent coils having a different electrical phase. The coil separators are slideably inserted between the adjacent pairs of coils, with the annular ring positioning and supporting the coil separators.Type: ApplicationFiled: January 26, 2011Publication date: July 26, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Ryan Van Tiem, Edward L. Kaiser, John C. Morgante, Paul F. Turnbull, Michael C. Muir