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HVAC actuator with internal heating

  • US 8,084,980 B2
  • Filed: 03/04/2009
  • Issued: 12/27/2011
  • Est. Priority Date: 01/30/2009
  • Status: Active Grant
First Claim
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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.

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