HVAC ACTUATOR WITH AUTOMATIC END STOP RECALIBRATION
First Claim
1. An actuator in a HVAC system, the actuator comprising:
- a motor;
a drive device driven by the motor and coupled to a movable HVAC component for driving the movable HVAC component between multiple positions bounded by one or more end stops; and
a main actuator controller comprising;
end stop location memory that stores one or more end stop locations indicating expected locations of the one or more end stops; and
an end stop location recalibrator that runs an automatic recalibration process to determine and set recalibrated end stop locations in response to detecting that the drive device has unexpectedly stalled at a location other than a stored end stop location.
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Accused Products
Abstract
An actuator in a HVAC system includes a motor and a drive device driven by the motor. The drive device is coupled to a movable HVAC component for driving the movable HVAC component between multiple positions. The actuator further includes a main actuator controller. The main actuator controller includes end stop location memory that stores one or more end stop locations indicating expected locations of the one or more end stops. The main actuator controller further includes an end stop location recalibrator that runs an automatic recalibration process to determine and set recalibrated end stop locations. The end stop location recalibrator runs the automatic calibration process in response to detecting that the drive device has unexpectedly stalled at a location other than a stored end stop location.
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Citations
20 Claims
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1. An actuator in a HVAC system, the actuator comprising:
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a motor; a drive device driven by the motor and coupled to a movable HVAC component for driving the movable HVAC component between multiple positions bounded by one or more end stops; and a main actuator controller comprising; end stop location memory that stores one or more end stop locations indicating expected locations of the one or more end stops; and an end stop location recalibrator that runs an automatic recalibration process to determine and set recalibrated end stop locations in response to detecting that the drive device has unexpectedly stalled at a location other than a stored end stop location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a HVAC actuator that includes a motor and a drive device driven by the motor and coupled to a movable HVAC component, the method comprising:
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operating the motor to drive the movable HVAC component between multiple positions bounded by one or more end stops; retrieving stored end stop locations from end stop location memory; and automatically initiating an automatic calibration procedure to determine and set recalibrated end stop locations in response to detecting that the drive device has unexpectedly stalled at a location other than a stored end stop location. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification