Patent ID: 8084980
Filing Date: 2011-12-27
Classification: F24F,G05B,H02P

Abstract:
1. An HVAC actuator for driving an HVAC component, comprising: a drive train configured to drive the HVAC component along a range of motion from a first HVAC component position to a second HVAC component position; a motor coupled to the drive train for driving the drive train and thus the HVAC component; and a controller for controlling the motor to move the HVAC component from the first HVAC component position to the second HVAC component position, the controller configured to detect a selected condition, and in response to detecting the selected condition, applying a supplemental current component to the motor, wherein the supplemental current component does not substantially move the HVAC component but warms the motor; and wherein the supplemental current component causes the motor to move in a first direction and then in a second direction, without substantially moving the HVAC component.