Patent ID: 9732976
Date: 2017-08-15
CPC Classifications: F04D,F24F,Y02B

Claim:
1. A method for providing constant airflow with a variable speed motor in a Heating, Ventilation, and Air Conditioning (HVAC) system, comprising: (a) determining a power and speed of a motor; (b) obtaining a target airflow rate for the HVAC system; (c) determining a target motor power that yields the target airflow rate in the HVAC system, wherein determining the target motor power comprises calculating the target motor power based on an equation, wherein the equation comprises the target motor power being set to equal a natural exponential function, and wherein an exponent of the natural exponential function is a non-linear higher-order polynomial function of at least the determined speed, the obtained target airflow rate for the HVAC system, and motor operation parameters, and wherein the non-linear higher-order polynomial function includes a product of at least one of: (d) determining whether the determined motor power is approximately equal to the target motor power; and (e) adjusting the power of the motor when the motor power is not approximately equal to the target motor power, wherein the motor power is adjusted until the motor power is approximately equal to the target motor power.