Why Servomotor Temperature Sensors Can Give Misleading Readings

Consult the data sheet for a typical brushless-dc servomotor and one normally finds torque-speed curves for both a continuous or safe-operating area (SOAC) and for times of intermittent peak power. The correct interpretation for the SOAC is this: It defines a torque-speed boundary within which the motor can operate safely and indefinitely without exceeding its maximum continuous operating temperature when powered by a specified drive and subjected to a specific ambient condition.