公开(公告)号：US20170158437A1

公开(公告)日：2017-06-08

申请号：US15364547

申请日：2016-11-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Thomas W. Nehl ,  James J. Abramczyk ,  Kenneth J. Shoemaker

IPC: B65G54/02

CPC classification number: B65H3/16 ,  B65G54/02 ,  B65G59/04 ,  B65H2515/71 ,  B65H2555/31 ,  B65H2701/1714 ,  B65H2701/173 ,  H02K15/02 ,  H02K41/025

Abstract: A magnetodynamic apparatus for separating conductive non-ferrous blanks includes at least one magnet positioned adjacent to a stack of the blanks and configured to generate a magnetic field in a first direction with respect to a major surface of an uppermost blank within the stack. The apparatus includes an actuator device for positioning the magnet with respect to the stack during production of an electric current in a second direction along the major surface. The second direction is normal to the first direction such that a magnetic separation force is generated in a third direction normal to the first and second directions. The separation force is sufficient for magnetically separating the uppermost blank from remaining blanks in the stack. The magnets may be rotated on a rotor or held stationary. The electric current may be induced or directly injected into the uppermost blank.

公开(公告)号：US20250119031A1

公开(公告)日：2025-04-10

申请号：US18483553

申请日：2023-10-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC.

Inventor： Yilun Luo ,  Khorshed Mohammed Alam ,  Muhammad A. Zahid ,  Mazharul Chowdhury ,  Peng Peng ,  Thomas W. Nehl ,  Junghoon Kim

IPC: H02K11/30 ,  H02K1/12 ,  H02K1/22

Abstract: An electric machine with reconfigurable rotor poles. The machine may include a stator including a plurality of stator windings configured for generating a rotating magnetic field (RMF) and a rotor configured for rotating within the stator according to a torque induced by the RMF. The rotor may include a plurality of rotor windings wrapped around a plurality of circumferentially spaced rotor protrusions. The electric machine may include a rotor power transfer circuit operable for reconfiguring electrical excitation of the rotor windings according to a plurality of excitation modes.

公开(公告)号：US20250015742A1

公开(公告)日：2025-01-09

申请号：US18347883

申请日：2023-07-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri ,  Muhammad Hussain Alvi ,  Junghoon Kim ,  Khorshed Mohammed Alam ,  Thomas W. Nehl ,  Yilun Luo

IPC: H02P27/06 ,  B60L50/60 ,  H02M7/537

Abstract: Multi-switch module packaging for a multilevel inverter is provided. A multilevel inverter is connected to the battery. The multilevel inverter includes three levels, each of the three levels having a first module and a second module. The first module is formed on a first insulating substrate material, and the second module is formed on a second insulating substrate material separate from the first insulating substrate material. The first module includes a first switch coupled to the battery via a positive power rail, a second switch coupled to the battery via a negative power rail, and a third switch coupled to the second module. The second module includes another first switch coupled to the battery, another second switch coupled to the battery, and another third switch coupled to the first module. The first module includes four terminals and the second module includes another four terminals.

公开(公告)号：US20240405307A1

公开(公告)日：2024-12-05

申请号：US18327231

申请日：2023-06-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Renato Amorim Torres ,  Suresh Gopalakrishnan ,  Lei Hao ,  Chandra S. Namuduri ,  Thomas W. Nehl

IPC: H01M10/615 ,  B60L50/51 ,  H02M7/5387

Abstract: A modulation strategy for maximization of battery heating efficiency is provided. A system includes an inverter coupled to a high voltage battery and a motor. A control system is coupled to the inverter. The control system is configured to control the inverter to output a first electrical current having a first triangular waveform to the motor, a second electrical current having a second triangular waveform to the motor, and a third electrical current to the motor. The first and second triangular waveforms are out of phase.

公开(公告)号：US20240388156A1

公开(公告)日：2024-11-21

申请号：US18320449

申请日：2023-05-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Peng Peng ,  Lei Hao ,  Suresh Gopalakrishnan ,  Renato Amorim Torres ,  Thomas W. Nehl

IPC: H02K3/28 ,  B60L53/16 ,  B60L53/22 ,  H02P25/22 ,  H02P27/06

Abstract: Embodiments include an electric motor having asymmetric-turn windings and a vehicle including the same. The electric motor includes a rotor and a stator having a first set of windings having a first number of turns and a second set of windings having a second number of turns that is different than the first number of turns. The first set of windings are galvanically isolated from the second set of windings.

公开(公告)号：US20240094267A1

公开(公告)日：2024-03-21

申请号：US17946332

申请日：2022-09-16

Applicant: GM Global Technology Operations LLC

Inventor： Alireza Fatemi ,  Muhammad Hussain Alvi ,  Thomas W. Nehl

IPC: G01R19/18 ,  B60L3/12

CPC classification number: G01R19/18 ,  B60L3/12 ,  B60L2210/44

Abstract: A current sensing apparatus may include a common mode core surrounding two or more current conductors and a current sensing element proximate the common mode core.

公开(公告)号：US11872906B2

公开(公告)日：2024-01-16

申请号：US17313257

申请日：2021-05-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: B60L58/19 ,  B60K1/00 ,  B60L3/04 ,  B60K35/00 ,  H02J7/14 ,  H02P29/032 ,  H02P29/024 ,  H02P29/60 ,  B60L15/20 ,  H02P29/028

CPC classification number: B60L58/19 ,  B60K1/00 ,  B60K35/00 ,  B60L3/04 ,  B60L15/20 ,  H02J7/1423 ,  H02P29/024 ,  H02P29/032 ,  H02P29/60 ,  B60K2001/006 ,  B60K2370/169 ,  B60L2240/425 ,  B60L2250/00 ,  H02P29/028

Abstract: An electric propulsion system includes a rotary electric machine having an output member, a rechargeable energy storage system (“RESS”) connected to the electric machine, a user interface device, and a controller. The RESS includes multiple battery modules and a switching circuit, the latter being configured, in response to electronic switching control signals, to connect the battery modules in a parallel-connected configuration or a series-connected configuration, as a selected battery configuration. The user interface device receives an operator-requested drive mode request as an electrical signal indicative of a desired drive mode of the electric propulsion system. The controller, which is programmed with mode-specific electrical loss information associated with the desired drive mode, establishes the selected battery configuration in response to the drive mode request, and presents a drive mode recommendation via the user interface device when the loss information associated with the desired drive mode exceeds a calibrated loss threshold.

公开(公告)号：US11830668B2

公开(公告)日：2023-11-28

申请号：US17724618

申请日：2022-04-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jian Yao ,  Denghao Fan ,  Alan G. Holmes ,  Yusheng Zou ,  Thomas W. Nehl

IPC: H02K15/03 ,  H01F41/02

CPC classification number: H01F41/0286 ,  H02K15/03 ,  Y10T29/49075

Abstract: A method of manufacturing a permanent magnet for a rotor of an axial flux electric machine is described herein. The method includes forming multiple permanent magnet (PM) pieces to have the same shape. Each of the PM pieces has an inner radial surface, an outer radial surface, and a pair of side surfaces extending between the inner and outer radial surfaces. The method further includes attaching at least one of the side surfaces of each of the PM pieces to one of the side surfaces of another one of the PM pieces to form partitions configured to extend in a radial direction of the rotor.

公开(公告)号：US11817748B2

公开(公告)日：2023-11-14

申请号：US16944578

申请日：2020-07-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza Fatemi ,  Anil K. Sachdev ,  Thomas W. Nehl

IPC: H02K1/30 ,  H02K1/02 ,  H02K1/27 ,  H02K15/03 ,  H02K7/00 ,  H02K1/276

CPC classification number: H02K1/30 ,  H02K1/02 ,  H02K1/276 ,  H02K7/006 ,  H02K15/03

Abstract: A method for constructing a lamination for a rotary electric machine includes forming an annular lamination from a ferrous core material having a first relative magnetic permeability. The lamination defines through-openings, e.g., for permanent magnets or conductors. Peripheral bridges of the core material extend between the through-openings and an outer or inner diameter surface of the lamination. The method includes diffusing an alloy material having a second relative magnetic permeability into the bridges to form austenitic bridges, with the second relative magnetic permeability being less than the first relative magnetic permeability. A rotary electric machine includes a stator and rotor. A vehicle includes a rotary electric machine connected to the battery pack and to road wheels, and having a rotor and/or a stator constructed in accordance with the method.

公开(公告)号：US11552519B2

公开(公告)日：2023-01-10

申请号：US17702848

申请日：2022-03-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Thomas W. Nehl ,  Alireza Fatemi

IPC: H01B5/08 ,  H02K3/14 ,  H02K1/16 ,  H02K1/276 ,  H02K3/02 ,  H02K1/00 ,  H02K3/34 ,  H02K15/03 ,  H02K15/06 ,  H02K15/10 ,  B60K1/00 ,  H02K7/00

Abstract: Presented are segmented hairpin bar conductors for electric machines, methods for making/using such segmented bar conductors, electromagnetic motors using such segmented bar conductors, and vehicles equipped with an induction motor generator unit using segmented hairpin bar conductors. An electric machine includes a stator that defines multiple circumferentially spaced, radially elongated stator slots. A rotor is located adjacent and movable with respect to the stator. One or more permanent magnets are mounted to the rotor, and one or more U-shaped hairpin windings are mounted to the stator in juxtaposed spaced relation to the magnet(s). Each hairpin winding is formed from an array of collimated, electrically conductive wires that are bundled together into a unitary bar conductor. The segmented hairpin winding has a pair of hairpin legs, each of which adjoins and projects from a respective end of a hairpin crown. Each hairpin leg inserts into a respective one the stator slots.