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公开(公告)号：US11575341B1
公开(公告)日：2023-02-07
申请号：US17514239
申请日：2021-10-29
Applicant: GM Global Technology Operations LLC
Inventor： Wei Zeng , Scott E. Parrish , Jeffrey Wentz Yambor , Young J. Kim
Abstract: A method for predicting a rotor temperature of an electric motor for an electric vehicle. The method includes measuring at least one of an operating parameter of the electric motor; inputting the at least one of the operating parameter of the electric motor into a predetermined regression model to predict a rotor temperature of the electric motor; and communicating the rotor temperature of the electric motor to a vehicle control module for managing the electric motor. The operating parameters includes a measured stator temperature, a torque level output, a rotor speed, and a coolant flowrate of the fixture electric motor. The electric motor may be that of an induction motor.
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Patent Agency Ranking
公开(公告)号：US20220360144A1
公开(公告)日：2022-11-10
申请号：US17315730
申请日：2021-05-10
Applicant: GM Global Technology Operations LLC
Inventor： SeungHwan Keum , Insu Chang , Jun-mo Kang , Young J. Kim
Abstract: An interior permanent magnet motor having controllable coolant distribution is provided. The motor comprises a motor housing and a rotary shaft connected to a rotor rotatably disposed in the housing. The motor further comprises a stator unit disposed in the housing and comprising conductive windings arranged about the rotor. The windings have a straight portion radially extending to an end-turn portion. The motor further comprises an oil sump disposed on the housing above the stator unit. The oil sump comprises a reservoir having an inner side and an outer side. The reservoir has at least one aperture formed therethrough over the end-turn portion. The motor further comprises a movable nozzle having a first open end extending to a second open end. The first open end is connected to the at least one aperture such that the movable nozzle and reservoir are in fluid communication. The second open end extends from the at least one aperture and positioned adjacently above the end turn portion for coolant distribution. The motor further comprises a connector movably disposed in the housing proximate to the movable nozzle. The motor further comprises a cam connected to the connector and in contact with the nozzle. Upon movement of the connector, the cam is arranged with the connector to move the second open end of the nozzle over the end turn portion for distribution of coolant oil from the oil sump to the end turn portion.
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13.发明公开公开(公告)号：US20240243682A1
公开(公告)日：2024-07-18
申请号：US18153386
申请日：2023-01-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Dylan M. Day , Matthew From , Young J. Kim , Daniel J. Berry
Abstract: An electric drive system includes a direct current (DC) power supply, a rotary electric machine connectable to a load, a power inverter module (PIM), and a controller. The PIM includes a bulk capacitor connected to the DC power supply, along with a plurality of power switches. Each power switch has an output side connected to the electric machine and an input side connected to the bulk capacitor. The controller executes a method to estimate an internal temperature of the bulk capacitor as an estimated internal temperature. This occurs in response to an enabling condition. The controller then selectively derates the electric machine in response to the estimated internal temperature.
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公开(公告)号：US20240162835A1
公开(公告)日：2024-05-16
申请号：US17984605
申请日：2022-11-10
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Daniel J. Berry , Young J. Kim , Dylan M. Day
Abstract: A system includes a battery configured for providing electrical energy in direct current and a drive unit configured for utilizing electrical energy in alternating current to provide an output torque. The system includes a power inverter configured for receiving the electrical energy in direct current, transforming the electrical energy to alternating current, and providing the electrical energy in alternating current to the drive unit. The power inverter includes a direct current bus bar. The system includes a computerized controller. The controller monitors an environmental temperature of the inverter and monitors a current flow of the electrical energy received by the inverter. The controller determines an estimated temperature of the bus bar based upon the environmental temperature and the current flow and determining an inverter percent available capability based upon the estimated temperature. The controller compares the capability to a threshold value and controls the drive unit based upon the comparing.
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公开(公告)号：US11722037B2
公开(公告)日：2023-08-08
申请号：US17315730
申请日：2021-05-10
Applicant: GM Global Technology Operations LLC
Inventor： SeungHwan Keum , Insu Chang , Jun-mo Kang , Young J. Kim
Abstract: An interior permanent magnet motor having controllable coolant distribution is provided. The motor comprises a motor housing and a rotary shaft connected to a rotor rotatably disposed in the housing. The motor further comprises a stator unit disposed in the housing and comprising conductive windings arranged about the rotor. The windings have a straight portion radially extending to an end-turn portion. The motor further comprises an oil sump disposed on the housing above the stator unit. The oil sump comprises a reservoir having an inner side and an outer side. The reservoir has at least one aperture formed therethrough over the end-turn portion. The motor further comprises a movable nozzle having a first open end extending to a second open end. The first open end is connected to the at least one aperture such that the movable nozzle and reservoir are in fluid communication. The second open end extends from the at least one aperture and positioned adjacently above the end turn portion for coolant distribution. The motor further comprises a connector movably disposed in the housing proximate to the movable nozzle. The motor further comprises a cam connected to the connector and in contact with the nozzle. Upon movement of the connector, the cam is arranged with the connector to move the second open end of the nozzle over the end turn portion for distribution of coolant oil from the oil sump to the end turn portion.
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16.发明申请公开(公告)号：US20230010156A1
公开(公告)日：2023-01-12
申请号：US17305639
申请日：2021-07-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： SeungHwan Keum , Jun-mo Kang , Insu Chang , Young J. Kim
Abstract: In various embodiments, methods, systems, and vehicle apparatuses are provided. A system provides a gravity drive to distribute coolant oil flow including a nozzle for directing a flow of coolant oil over a surface of an electric motor wherein the flow of the coolant oil is caused by a gravity drive; a connector that is coupled to the nozzle that enables the nozzle to sway in response to external forces encountered by a vehicle operation and to distribute coolant oil over the exterior surface of the electric motor; and a counterweight that is coupled to the nozzle that provides a countermeasure to the external forces encountered by the vehicle operation to cause the nozzle to sway in a manner that enables the coolant oil distributed evenly across the exterior surface of the electric motor.
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