公开(公告)号：US09692266B2

公开(公告)日：2017-06-27

申请号：US14337833

申请日：2014-07-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Thomas W. Nehl ,  Lei Hao ,  Rajeev Vyas ,  Chandra S. Namuduri ,  Michael G. Reynolds

IPC: H02K1/27 ,  H02K1/24

CPC classification number: H02K1/2773 ,  H02K1/246 ,  H02K1/276 ,  H02K1/2766

Abstract: A rotor of a permanent magnet synchronous machine includes a rotor core structure. A first set of apertures are formed in a first radial layer of the rotor core structure having a first set of permanent magnets disposed therein forming respective poles. A second set of apertures formed in a second radial layer of the rotor core structure of each pole. A third set of apertures is formed in a third radial layer of the rotor core structure. A second set of permanent magnets is inserted within the third set of apertures. A plurality of bridges each extends across a respective side of each of the third set of apertures in the third radial layer. The plurality of bridges provides structural support of the rotor core structure when operating. The plurality of bridges are integrally formed as single-piece laminations.

公开(公告)号：US20250030300A1

公开(公告)日：2025-01-23

申请号：US18355743

申请日：2023-07-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： William T. Ivan ,  Alireza Fatemi ,  Rajeev Vyas ,  Alan Del Rio ,  Rebecca K. Risko Cattell

IPC: H02K5/08 ,  H02K15/14

Abstract: A multi-phase, multi-pole permanent magnet motor/generator (electric machine) is described, and includes a rotor disposed on a rotor shaft within an annular stator, which may be arranged in a housing with an interposed insulator system. The insulator system is arranged to mitigate and isolate common mode currents in a shaft bearing system by insulating the stator core from an electrical ground return path of an electrical driving source. The electric machine includes a rotor rotatably disposed within a stator, and the stator is secured to the housing with the insulator system interposed therebetween.

公开(公告)号：US20210072316A1

公开(公告)日：2021-03-11

申请号：US16566128

申请日：2019-09-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： William A. Powers, JR. ,  Rajeev Vyas ,  Stephen G. Poulos ,  Ashish V. Gadre

IPC: G01R31/34 ,  H01M8/0432

Abstract: A method for identifying and mapping a maximum instantaneous stall torque capability of a fuel cell cathode valve includes: maintaining a temperature of an electric motor at a predetermined temperature, wherein the predetermined temperature is equal to or less than a freezing point of water (0° C.), and the electric motor includes motor brushes, commutator poles, a stator, a rotor rotatable with respect to the stator, and a shaft coupled to the rotor; locking the shaft of the electric motor such that the shaft is incapable of rotating, thereby fixing the shaft at a locked position; mounting the shaft of the electric motor to a dynamometer; supplying electrical energy to the electric motor; monitoring an instantaneous stall torque of the electric motor; and monitoring a rotor electrical resistance.

公开(公告)号：US09973134B1

公开(公告)日：2018-05-15

申请号：US15451898

申请日：2017-03-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Rajeev Vyas ,  Suresh Gopalakrishnan ,  Mark J. Rychlinski ,  Markus Demmerle ,  Varsha K. Sadekar

IPC: G05B5/00 ,  H02H7/08 ,  H02P1/04 ,  H02P3/00 ,  H02P7/00 ,  H02P29/024 ,  H02P27/06 ,  H02P6/08 ,  B60L11/18 ,  B60L3/00

CPC classification number: H02P29/027 ,  B60L3/0046 ,  B60L3/0076 ,  B60L7/18 ,  B60L7/22 ,  B60L11/1861 ,  B60L2240/547 ,  B60L2240/549 ,  H02P6/08 ,  H02P27/06

Abstract: An electrical system includes a direct current (DC) voltage bus, a power supply providing a supply voltage to the DC voltage bus, an electric machine connected to the power supply, a reverse current protection (RCP) circuit positioned between the power supply and the electric machine, the RCP circuit including an energy dissipating element, and a controller. As part of an associated method, the controller detects a reverse current condition in which a current flows from the electric machine toward the power supply when an induced voltage of the electric machine exceeds a voltage level of the voltage bus. The controller transmits a control signal to the RCP circuit to direct the electrical current through the energy dissipating element for a duration of the reverse current condition or for a predetermined duration equal to or greater than that of the reverse current condition.

公开(公告)号：US20170163181A1

公开(公告)日：2017-06-08

申请号：US15358179

申请日：2016-11-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Rajeev Vyas ,  Fausto Eleazar Vazquez Flores ,  Mark J. Rychlinski ,  Varsha Sadekar

IPC: H02P6/06 ,  F01P7/10 ,  H02P6/14 ,  H02P27/08 ,  H02P29/20

CPC classification number: H02P6/06 ,  B60K11/06 ,  B60L1/003 ,  B60L2240/12 ,  B60L2240/445 ,  F01P7/048 ,  H02P6/14 ,  H02P27/08 ,  H02P29/20 ,  Y02T10/642 ,  Y02T90/16

Abstract: A vehicle including a cooling fan that is rotatably coupled to an electric motor that is electrically powered by a DC power source via an inverter is described. A method for controlling the cooling fan includes monitoring, via a first controller, a vehicle speed, and selecting a preferred operating state for the electric motor based upon the vehicle speed. The preferred operating state includes one of a first command associated with controlling the cooling fan to force air through the cooling system, a second command associated with a fan brake request, and a third command associated with an energy recovery mode. A discrete message from the first controller is communicated to an inverter controller, wherein the discrete message is based upon the preferred operating state for the electric motor. The inverter controller controls the inverter to control the electric motor in response to the discrete message.

公开(公告)号：US20240396381A1

公开(公告)日：2024-11-28

申请号：US18323678

申请日：2023-05-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： William T. Ivan ,  Mehrdad Teimorzadeh ,  Rajeev Vyas ,  Alireza Fatemi

IPC: H02K1/14 ,  H02K5/02 ,  H02M7/00

Abstract: An alternating current (AC) choke having a housing extending along a longitudinal axis and at least partially defining a three-phase conductor opening extending along the longitudinal axis. A plurality of core segments is at least partially enclosed in the housing along the longitudinal axis and surround the longitudinal axis.

公开(公告)号：US11372046B2

公开(公告)日：2022-06-28

申请号：US16566128

申请日：2019-09-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： William A. Powers, Jr. ,  Rajeev Vyas ,  Stephen G. Poulos ,  Ashish V. Gadre

IPC: G01R31/34 ,  H01M8/0432

Abstract: A method for identifying and mapping a maximum instantaneous stall torque capability of a fuel cell cathode valve includes: maintaining a temperature of an electric motor at a predetermined temperature, wherein the predetermined temperature is equal to or less than a freezing point of water (0° C.), and the electric motor includes motor brushes, commutator poles, a stator, a rotor rotatable with respect to the stator, and a shaft coupled to the rotor; locking the shaft of the electric motor such that the shaft is incapable of rotating, thereby fixing the shaft at a locked position; mounting the shaft of the electric motor to a dynamometer; supplying electrical energy to the electric motor; monitoring an instantaneous stall torque of the electric motor; and monitoring a rotor electrical resistance.

公开(公告)号：US10044297B2

公开(公告)日：2018-08-07

申请号：US15358179

申请日：2016-11-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Rajeev Vyas ,  Fausto Eleazar Vazquez Flores ,  Mark J. Rychlinski ,  Varsha Sadekar

IPC: G06F7/00 ,  H02P6/06 ,  H02P27/08 ,  H02P29/20 ,  H02P6/14 ,  F01P7/10 ,  B60L1/00 ,  B60K11/02

Abstract: A vehicle including a cooling fan that is rotatably coupled to an electric motor that is electrically powered by a DC power source via an inverter is described. A method for controlling the cooling fan includes monitoring, via a first controller, a vehicle speed, and selecting a preferred operating state for the electric motor based upon the vehicle speed. The preferred operating state includes one of a first command associated with controlling the cooling fan to force air through the cooling system, a second command associated with a fan brake request, and a third command associated with an energy recovery mode. A discrete message from the first controller is communicated to an inverter controller, wherein the discrete message is based upon the preferred operating state for the electric motor. The inverter controller controls the inverter to control the electric motor in response to the discrete message.

公开(公告)号：US20160229386A1

公开(公告)日：2016-08-11

申请号：US14615809

申请日：2015-02-06

Applicant: GM Global Technology Operations LLC

Inventor： William T. Ivan ,  Rajeev Vyas ,  Dustin Willim ,  Roger B. Hackney

IPC: H02K11/02 ,  C25D13/12 ,  B60K1/00

CPC classification number: B60K1/00 ,  B60K17/356 ,  B60K2001/001 ,  B60Y2200/92 ,  C25D13/12

Abstract: A number of variations may include a transmission assembly comprising a housing and a plurality of components within the housing comprising a drive motor that emits electromagnetic interference, a differential assembly, a first shaft connecting the drive motor to the differential assembly, and an output stub shaft connected to the differential assembly and thread through a hole in the housing to connect to a driveshaft wherein the output stub shaft comprises a noise reduction component constructed and arranged to reduce electromagnetic interference from the transmission assembly to the driveshaft.

Abstract translation: 许多变型可以包括传动组件，其包括壳体和壳体内的多个部件，包括发射电磁干扰的驱动马达，差速器组件，将驱动马达连接到差速器组件的第一轴和输出短轴 连接到差速器组件并穿过壳体中的孔连接到驱动轴，其中输出短轴包括构造和布置成降低从变速器组件到驱动轴的电磁干扰的降噪部件。