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：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.