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公开(公告)号：US20190252935A1
公开(公告)日：2019-08-15
申请号：US15895400
申请日：2018-02-13
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Jihyun Kim , Michael C. Muir , Yew Sum Leong
CPC classification number: H02K1/2766 , H02K3/345 , H02K7/14
Abstract: 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.
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公开(公告)号：US11594921B2
公开(公告)日：2023-02-28
申请号：US16710787
申请日：2019-12-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Peng Zhang , Song He , Michael C. Muir
Abstract: 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.
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公开(公告)号：US20220368184A1
公开(公告)日：2022-11-17
申请号：US17317088
申请日：2021-05-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Song He , Peng Zhang , Michael C. Muir , Yew Sum Leong
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20250055403A1
公开(公告)日：2025-02-13
申请号：US18448464
申请日：2023-08-11
Applicant: GM Global Technology Operations LLC
Inventor： Mohammad F. Momen , Mazharul Chowdhury , Michael C. Muir , Jared Lee
Abstract: Rotor flux control in a permanent magnet (PM) electric machine involves controlling fluid flow through the rotor based on the torque versus speed operating point of the PM machine. When the torque at a given speed falls below a predetermined threshold, the rotor receives a reduced fluid flow compared to when the torque is above the threshold. Fluid flow through the stator is controlled in an inverse manner relative to the rotor's fluid flow such that when the rotor experiences reduced fluid flow, the stator receives an increased fluid flow. This approach enables efficient control of the rotor's magnetic flux, enhancing the performance and efficiency of the PM electric machine during various operating conditions.
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公开(公告)号：US10886802B2
公开(公告)日：2021-01-05
申请号：US15895400
申请日：2018-02-13
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Jihyun Kim , Michael C. Muir , Yew Sum Leong
Abstract: 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.
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公开(公告)号：US09669820B1
公开(公告)日：2017-06-06
申请号：US15097412
申请日：2016-04-13
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Brendan M. Conlon , Shawn H. Swales , Michael C. Muir , Aniket P. Kothari , Michael V. Woon
CPC classification number: G01S19/42 , B60K6/448 , B60K6/485 , B60K6/52 , B60W10/06 , B60W10/08 , B60W20/12 , B60W2510/244 , B60W2550/14 , B60W2550/402 , B60W2710/0677 , B60W2710/086 , G01C21/3469 , Y02T10/6226 , Y02T10/6243 , Y02T10/6265 , Y02T10/6286 , Y10S903/93
Abstract: 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.
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公开(公告)号：US20250119009A1
公开(公告)日：2025-04-10
申请号：US18483237
申请日：2023-10-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Mazharul Chowdhury , Cheongun Han , Michael C. Muir , Mohammad F. Momen , Edward L. Kaiser
Abstract: A rotor for an electric machine including a rotor core having a plurality of circumferentially spaced rotor poles. Each rotor pole may include a plurality of rotor slots arranged into one or more magnetic layers and one or more non-magnetic layers. The magnetic layers may include a magnet within one or more of the rotor slots thereof and the non-magnetic layers including no magnets within the rotor slots thereof.
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公开(公告)号：US20210184520A1
公开(公告)日：2021-06-17
申请号：US16710787
申请日：2019-12-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Peng Zhang , Song He , Michael C. Muir
Abstract: 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.
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