公开(公告)号：US20220140713A1

公开(公告)日：2022-05-05

申请号：US17083747

申请日：2020-10-29

Applicant: GM Global Technology Operations LLC

Inventor： Alireza Fatemi ,  Thomas W. Nehl ,  Derek F. Lahr

IPC: H02K21/02

Abstract: An electric machine includes a stator and a rotor positioned in operational engagement with one another and defining a radial gap extending circumferentially between the stator and the rotor, the rotor including a plurality of rotor segments defining a plurality of segment gaps between adjacent pairs of the plurality of rotor segments, the rotor segments radially moveable relative to the stator, wherein movement of the plurality of rotor segments radially outward increases the radial gap between the stator and the rotor and the segment gaps between adjacent pairs of the plurality of rotor segments.

公开(公告)号：US11043875B2

公开(公告)日：2021-06-22

申请号：US16196379

申请日：2018-11-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza Fatemi ,  Xiaofeng Yang ,  Thomas W. Nehl ,  Farzad Samie ,  Srihari K. Gangaraj

IPC: H02K9/197 ,  H02K5/20 ,  H02K1/20 ,  H02K9/19

Abstract: An apparatus for cooling an electric machine includes a plurality of fluid channels disposed in a first surface that surrounds at least part of the electric machine. Each of the plurality of fluid channels defines a circumferential path in the first surface, including a first channel section extending at least substantially parallel to first and second circumferences defined by ends of the electric machine, and including a second channel section configured to direct a cooling fluid between a central region of the first surface and an end region of the first surface. The apparatus also includes an outer shell configured to surround the first surface and define a fluid tight chamber between the first surface and the outer shell, the outer shell having at least one inlet through which the cooling fluid is introduced into the chamber and at least one outlet from which the cooling fluid exits the volume.

公开(公告)号：US10940771B1

公开(公告)日：2021-03-09

申请号：US16656048

申请日：2019-10-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H02P1/00 ,  B60L58/19 ,  B60L50/60 ,  B60L15/20 ,  B60K1/00 ,  B60K1/04

Abstract: An electric propulsion system includes a polyphase rotary electric machine that imparts motor torque to a load, a traction power inverter module (“TPIM”) connected to the electric machine, a reconfigurable energy storage system (“RESS”) connected to the TPIM, and a controller. The RESS has multiple battery modules and a switching circuit. The battery modules are connectable in a series-connected (“P-connected”) configuration at a first/low battery voltage level, and a series-connected (“S-connected”) configuration at a second/high battery voltage level that exceeds the first voltage. The controller determines power losses of the electric propulsion system at the first and second battery voltage levels, receives a commanded output torque and output speed of the electric machine, and selects the S-connected or P-connected configuration based on the predetermined power loss and commanded output torque and speed.

公开(公告)号：US10654370B2

公开(公告)日：2020-05-19

申请号：US16531648

申请日：2019-08-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Thomas W. Nehl ,  Lei Hao ,  Michael Harpster ,  Andrew K. Chandler

IPC: B60L53/10 ,  B60L53/16 ,  B60L53/65 ,  B60L50/60

Abstract: An apparatus for flexible DC fast charging of an electrified vehicle includes a charge receptacle and a vehicle charging controller programmed to establish a wireless communication with a charging station. The apparatus further includes a reconfigurable energy storage system selectively and electrically connected to the charge receptacle. The reconfigurable energy storage system includes a first rechargeable energy storage device selectively and electrically connected to the charge receptacle, a second rechargeable energy storage device selectively connected to the charge receptacle, and a plurality of low-loss switching devices selectively connected to the first rechargeable energy storage device and the second rechargeable energy storage device. The vehicle charging controller is programmed to selectively actuate the plurality of low-loss switching devices based on the charging voltage of the charging station such that a nominal voltage of the reconfigurable energy storage system matches the charging voltage of the charging station.

公开(公告)号：US10480476B2

公开(公告)日：2019-11-19

申请号：US15961204

申请日：2018-04-24

Applicant: GM Global Technology Operations LLC

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

IPC: F02N11/08

Abstract: A starter system includes a brushless electric starter motor and a battery power pack, the motor operatively connectable to an internal combustion engine of a powertrain. A power inverter converts direct current provided from the battery power pack to multi-phase alternating current to drive the motor. A pinion gear with one-way clutch is rotatably driven by the motor and movable between a disengaged position and an engaged position in which the pinion gear is meshingly engaged with a ring gear operatively connected to a crankshaft of the engine. A solenoid is operatively connected to the pinion gear. An electronic control system controls the motor to crank the engine using power provided from the battery power pack, and to separately command the solenoid to a disabled or an enabled state. A method of controlling the starter system controls the motor to crank the engine in a restart following an autostop.

公开(公告)号：US10369896B2

公开(公告)日：2019-08-06

申请号：US15824525

申请日：2017-11-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Thomas W. Nehl ,  Lei Hao ,  Michael Harpster ,  Andrew K. Chandler

IPC: H02J7/00 ,  B60L11/18

Abstract: An apparatus for flexible DC fast charging of an electrified vehicle includes a charge receptacle and a vehicle charging controller programmed to establish a wireless communication with a charging station. The apparatus further includes a reconfigurable energy storage system selectively and electrically connected to the charge receptacle. The reconfigurable energy storage system includes a first rechargeable energy storage device selectively and electrically connected to the charge receptacle, a second rechargeable energy storage device selectively connected to the charge receptacle, and a plurality of low-loss switching devices selectively connected to the first rechargeable energy storage device and the second rechargeable energy storage device. The vehicle charging controller is programmed to selectively actuate the plurality of low-loss switching devices based on the charging voltage of the charging station such that a nominal voltage of the reconfigurable energy storage system matches the charging voltage of the charging station.

公开(公告)号：US10190526B2

公开(公告)日：2019-01-29

申请号：US15127014

申请日：2015-03-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: F02D41/40 ,  F02D41/20 ,  H03K17/64 ,  F02M51/06 ,  F02M57/00 ,  F16K31/06 ,  H02P25/06 ,  H01F7/16 ,  H01F7/18

Abstract: A method for providing consistent actuator events for each of a plurality of consecutive actuator events of an electromagnetic actuator, includes applying a first bi-directional current waveform for a first actuator event and applying a second bi-directional current waveform for a second actuator event immediately subsequent to the first actuator event. The first bi-directional current waveform includes applying current in a first direction when the actuator is commanded to an actuated position and applying current in a reversed second direction when the actuator is commanded to a rest position. The second bi-directional current waveform includes applying current in the reversed second direction when the actuator is commanded to an actuated position and applying current in the first direction when the actuator is commanded to a rest position.

公开(公告)号：US09926146B2

公开(公告)日：2018-03-27

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: B25J15/06 ,  B65H3/16 ,  B66C1/04 ,  B65G59/04 ,  B25J9/16 ,  H02K15/02 ,  H02K41/025 ,  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：US20170163132A1

公开(公告)日：2017-06-08

申请号：US15364563

申请日：2016-11-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H02K15/02 ,  H02K41/025

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

Abstract: An electrodynamic apparatus for separating electrically conductive, non-ferrous, blanks includes a linear induction machine (LIM) stator, a polyphase power source, and a controller. Stator slots are wound with polyphase AC windings. The power source outputs a polyphase voltage or current. The controller supplies the windings with the voltage or current via the power source to induce an electric current in an uppermost blank and produce a traveling wave magnetic field. The electric current and magnetic field generate a force on the uppermost blank sufficient for separating the uppermost blank from an adjacent blank in the stack. A method for separating the blanks includes positioning the stack with respect to the apparatus and supplying the windings with AC voltage or current via the power source to generate the traveling wave magnetic field and induce the electric current, and ultimately generate the force on the uppermost blank.

公开(公告)号：US20250132651A1

公开(公告)日：2025-04-24

申请号：US18490057

申请日：2023-10-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Peng Peng ,  Thomas W. Nehl ,  Derek F. Lahr ,  Alireza Fatemi ,  Lei Hao ,  Suresh Gopalakrishnan ,  Avoki M. Omekanda ,  Renato Amorim Torres ,  Mazharul Chowdhury

IPC: H02K19/12 ,  H02K3/28

Abstract: A magnet-free electric machine. The electric machine may include a stator including a first stator winding set and a second stator winding set and a rotor including a first rotor winding set and a second rotor winding set. The electric machine may include a power transfer circuit configured for controlling a polarity and/or a phase sequence of excitation currents used in exciting the first and second stator and rotor windings, and thereby, respectively generated stator and rotor poles.