Patent 9200847 was granted and assigned to Carrier Corporation on December, 2015 by the United States Patent and Trademark Office.
A method of controlling a blower motor in a furnace includes applying control signals to the blower motor; determining that a reference airflow through a portion of the furnace is present; determining a reference control signal at which the reference air flow is present; receiving a requested airflow; computing a requested control signal in response to the reference air flow, the reference control signal and the requested airflow; and using the requested control signal to control the blower motor.