公开(公告)号：US12244211B2

公开(公告)日：2025-03-04

申请号：US17931012

申请日：2022-09-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jared Lee ,  Robert Seungmo Lee ,  Jeffrey R Kelly ,  Addison T Solak

IPC: H02K9/19 ,  H02K1/32 ,  H02K9/193 ,  B60K1/00 ,  B60K11/02

Abstract: Systems and methods provide active control of rotor cooling. In a number of embodiments, a system includes a controller coupled with an electric machine having a rotor. The controller evaluates parameters related to the electric machine for flow rate requirements of the rotor, where the flow rate requirements relate to cooling of the rotor. A flow rate of a fluid for cooling the rotor is computed, where the flow rate is based on a composite of the flow rate requirements. A control valve signal is delivered to set a control valve to supply the flow rate to the rotor based on the parameters.

公开(公告)号：US20250055403A1

公开(公告)日：2025-02-13

申请号：US18448464

申请日：2023-08-11

Applicant: GM Global Technology Operations LLC

Inventor： Mohammad F. Momen ,  Mazharul Chowdhury ,  Michael C. Muir ,  Jared Lee

IPC: H02P29/66 ,  B60L15/20

Abstract: Rotor flux control in a permanent magnet (PM) electric machine involves controlling fluid flow through the rotor based on the torque versus speed operating point of the PM machine. When the torque at a given speed falls below a predetermined threshold, the rotor receives a reduced fluid flow compared to when the torque is above the threshold. Fluid flow through the stator is controlled in an inverse manner relative to the rotor's fluid flow such that when the rotor experiences reduced fluid flow, the stator receives an increased fluid flow. This approach enables efficient control of the rotor's magnetic flux, enhancing the performance and efficiency of the PM electric machine during various operating conditions.

公开(公告)号：US20240083230A1

公开(公告)日：2024-03-14

申请号：US17931012

申请日：2022-09-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jared Lee ,  Robert Seungmo Lee ,  Jeffrey R. Kelly ,  Addison T. Solak

IPC: B60K1/00 ,  B60K11/02 ,  H02K9/19

CPC classification number: B60K1/00 ,  B60K11/02 ,  H02K9/19 ,  B60K2001/006

Abstract: Systems and methods provide active control of rotor cooling. In a number of embodiments, a system includes a controller coupled with an electric machine having a rotor. The controller evaluates parameters related to the electric machine for flow rate requirements of the rotor, where the flow rate requirements relate to cooling of the rotor. A flow rate of a fluid for cooling the rotor is computed, where the flow rate is based on a composite of the flow rate requirements. A control valve signal is delivered to set a control valve to supply the flow rate to the rotor based on the parameters.