Patent ID: 11958364
Assignee: RIVIAN IP HOLDINGS, LLC
Field: Transport (Mechanical engineering)
Classification: CPC B  G  H | IPC B  G  H

Claim 19:
20. A vehicle comprising:
an electric motor comprising a motor shaft and an input gear coupled to the motor shaft;
power electronics configured to output power to the electric motor;
a gearbox, wherein the input gear couples the electric motor to the gearbox;
a sensor coupled to the motor shaft and configured to output a signal indicating an amount of rotation of the motor shaft;
input circuitry configured to receive the signal from the sensor; and
control circuitry configured to:
determine an acceleration of the electric motor, based on the signal from the sensor;
determine an internal torque between the motor shaft and the input gear, based on the acceleration of the electric motor and an inertia of the electric motor and the gearbox;
determine whether the internal torque exceeds a conditional shutdown threshold torque;
in response to determining that the internal torque exceeds the conditional shutdown threshold torque, incrementing a counter; and
in response to determining that the counter exceeds a counter threshold, control the power electronics to reduce the power output to the electric motor.