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    Vehicle engine starter control systems and methods
    31.
    发明授权
    Vehicle engine starter control systems and methods 有权

    公开(公告)号：US10605217B2

    公开(公告)日：2020-03-31

    申请号：US15452312

    申请日：2017-03-07

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Chandra S. Namuduri ,  Lei Hao ,  Thomas W. Nehl

    IPC: F02N11/08 ,  F02N15/06 ,  F02N15/02

    Abstract: A vehicle propulsion system includes an engine configured to be selectively activated to provide torque to propel the vehicle and a starter module coupled to the engine and configured to start the engine from an inactive state. The starter module includes a brushless electric machine to generate an output torque to crank start the engine. The starter motor also includes a pinion gear coupled to the electric machine, where the pinion gear is actuatable to selectively engage a cranking input of the engine. A controller assembly is programmed to cause actuation of the pinion gear to engage the cranking input of the engine and transfer a cranking torque to activate the engine.

    STARTER INCLUDING A SWITCHED RELUCTANCE ELECTRIC MOTOR
    32.
    发明申请
    STARTER INCLUDING A SWITCHED RELUCTANCE ELECTRIC MOTOR 审中-公开

    公开(公告)号：US20190326842A1

    公开(公告)日：2019-10-24

    申请号：US15961119

    申请日：2018-04-24

    Applicant: GM Global Technology Operations LLC

    Inventor： Avoki M. Omekanda ,  Lei Hao ,  Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Thomas W. Nehl

    IPC: H02P25/092 ,  F02N11/08

    Abstract: A starter includes a three-phase switched reluctance electric motor including a rotor and a stator, a pinion gear, a power inverter that is connected to the stator, and a rotational position sensor. The rotor includes a quantity of rotor poles that is between 6 and 16, and the stator includes a quantity of stator poles that is between 8 and 24. An outer diameter of the electric motor is less than 85 mm. An active length of the motor is less than 50 mm. An airgap distance between the rotor and the stator is between 0.1 mm and 0.5 mm. A ratio between a rotor pole arc and a stator pole arc is at least 1.0:1. A ratio between a stator diameter and a rotor diameter is at least 2.0:1, and a ratio between a stator pole height and a rotor pole height is at least 2.5:1.

    ON-AXIS BRUSHLESS STARTER ASSEMBLY
    33.
    发明申请
    ON-AXIS BRUSHLESS STARTER ASSEMBLY 审中-公开

    公开(公告)号：US20190323475A1

    公开(公告)日：2019-10-24

    申请号：US15961216

    申请日：2018-04-24

    Applicant: GM Global Technology Operations LLC

    Inventor： Chandra S. Namuduri ,  Lei Hao ,  Alexandru Rajala ,  Thomas W. Nehl

    IPC: F02N15/04 ,  F02N11/08 ,  F16H1/28 ,  H02K5/15 ,  H02K5/22 ,  H02K7/08 ,  H02K7/116 ,  H02K11/21 ,  H02K11/33

    Abstract: A starter assembly includes a partial planetary gear set connected to a pinion gear slidable along a first axis. The starter also includes a motor casing housing a brushless electric motor and having a first bearing. The motor includes multi-phase stator and rotor assemblies arranged inside the casing concentrically relative to the first axis. The rotor assembly has a rotor with a shaft supported by the first bearing and connected to a sun gear engaging the gear set, and a rotor position and speed sensor target. The starter additionally includes a motor end-cap for mating with and enclosing the motor casing and having a second bearing supporting the shaft. The starter also includes an electronics cover with a power connector for mating with the end-cap and housing an electronic commutator assembly. The commutator assembly includes power electronics, and control processor electronics arranged between the end-cap and the power electronics.

    Hybrid vehicle engine starter control systems and methods
    35.
    发明授权
    Hybrid vehicle engine starter control systems and methods 有权

    公开(公告)号：US10190559B2

    公开(公告)日：2019-01-29

    申请号：US15985836

    申请日：2018-05-22

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Lei Hao ,  Chandra S. Namuduri ,  Thomas W. Nehl

    IPC: F02N11/08 ,  B60K6/48 ,  B60L11/18 ,  F02N11/04 ,  B60K6/387

    Abstract: A system includes an electric machine coupled to an engine and configured to start the engine from an inactive state. A controller executes a first control algorithm while output speed of the electric machine is less than a first speed threshold, and also executes a second control algorithm while the output speed is greater than the first speed threshold and less than a second speed threshold. Additionally, the controller is programmed to execute a third control algorithm while the output speed is greater than the second speed threshold. The first control algorithm includes operating the electric machine using trapezoidal current control with pulse width modulation. The second control algorithm includes operating the electric machine using six-step voltage control with a variable phase advance angle. The third control algorithm includes operating the electric machine using six-step voltage control with a predetermined fixed phase advance angle.

    INTERIOR PERMANENT MAGNET ELECTRIC MACHINE
    36.
    发明申请
    INTERIOR PERMANENT MAGNET ELECTRIC MACHINE 审中-公开

    公开(公告)号：US20180358876A1

    公开(公告)日：2018-12-13

    申请号：US15616511

    申请日：2017-06-07

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Alireza Fatemi ,  Lei Hao ,  Thomas W. Nehl ,  Chandra S. Namuduri ,  Norman K. Bucknor

    IPC: H02K21/14 ,  H02K1/27 ,  H02K1/02 ,  H02K1/16

    CPC classification number: H02K21/145 ,  H02K1/02 ,  H02K1/16 ,  H02K1/276

    Abstract: An IPM electric machine includes a rotor, rotor shaft stator, and permanent magnets. The rotor includes rare earth permanent magnets disposed within pockets. The rotor, the pockets and the permanent magnets conform to a first set of geometric design parameters. The stator includes radially-inwardly projecting teeth that form slots between pairs of the teeth. Electrical windings are disposed within slots of the laminate stack. The teeth and slots conform to a second set of geometric design parameters. The quantity of slots is between 60 and 96, the quantity of electrical poles is between 6 and 12, the quantity of electrical phases is between 3 and 6 and the electrical windings include a quantity of turns per phase that is between 8 and 20. A ratio of an outer diameter of the stator to an active length of the rotor is between 2 and 3.5.

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