#Variable speed fan control full
By increasing (and decreasing) its airflow gradually, Chore-Time's Variable Speed Fan helps smooth out both airflow and temperature during the period before and after full tunnel operation.This process can be repeated until all tunnel fans are on. It then drops back to the minimum speed setting again and begins ramping up as the house temperature increases. The fan gradually accelerates to 100% (based on house temperature) until the first tunnel fan comes on.Using your CHORE-TRONICS® 3 Control and a Variable Frequency Drive, the fan equipped with variable speed capability comes on briefly at 100% to open the shutter, then drops back to the minimum speed setting.
How Does Use of a Variable Speed Fan Work?
The fan’s ability to gradually ramp up to full capacity (or down from full capacity) as the temperature goes up (or down) allows for a more gradual change in air speed, saves energy and provides a more consistent environment for birds. Inexpensively add variable speed capability to existing houses by converting existing tunnel fans to variable speed. Reduce framing costs for new construction or retrofitting by adding a variable speed kit to a tunnel fan instead of installing a small fan. With damper control, the input power reduces as the flow rate decreases, however under variable frequency drive control the power reduction is far more dramatic. Gain efficiency with impressive CFM/watt during ramp up and ramp down periods. Although dampers are commonly used to control the output of fans, reducing the speed of the fan by variable frequency drive (VFD) is a much more energy efficient method of achieving the same effect. Improve the environment for your birds by using Chore-Time’s variable speed fan to smooth the house’s airflow and temperature curves. Are you concerned about energy efficiency on your small minimum ventilation fans?Ĭhore-Time’s variable speed fan option offers a solution to these problems and an improved environment for your birds. Have your young birds experienced chilling or increased mortality from excess airflow?. Have you ever noticed excessive fan cycling?. They use phase angle control - TRIAC technology - to adjust the motor voltage and to control the fan speed. 
Typically they are used to control AC fans or pumps in HVAC applications. » Collapse all photos Chore-Time® 57-, 54-, 52- and 48-Inch Fans (145-, 137.2-, 132.1- and 121.9-cm)* with HYFLO® Shutters Select models available with a variable speed option to improve your birds' environment! The Energy-Efficient Way to Smooth House Temperature and Airflow Changes Electronic fan speed controllers provide infinitely variable speed control for single-phase or three-phase voltage controllable motors.
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