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Electronic fan speed controllers

Variable speed control for AC fans with voltage controllable motor. The main advantages of an electronic speed controller are its quiet operation and the fact that no complex configuration is required. Once everything is connected, motor speed can be regulated infinitely variable – for most applications with the default settings.
Electronic fan speed controllers

Microprocessor controlled to minimise motor noises
Electronic or variable speed controllers offer infinitely variable speed control for AC fans with voltage controllable motor. Typically, these controllers are used to optimise the speed of AC fans or pumps in HVAC applications. They use phase angle control - TRIAC technology - to reduce the motor voltage and to regulate fan speed. TRIAC fan speed controllers are typically available for motor currents up to 10 A. Electronic fan speed controllers operate completely silently. They reduce the mains voltage by eliminating parts of it. This means that the generated motor voltage doesn’t have a perfect sinusoidal shape. This might cause some additional motor noise, depending on the motor. Microprocessor control makes it possible to optimise the zero-cross detection and to increase the accuracy of the TRIACs. This technology reduces the extra motor noises.

Local or remote fan speed control
Some electronic fan speed controllers have a built-in potentiometer to manually adjust the motor speed. Other variants can be controlled remotely via Modbus RTU communication or via an analogue (0-10 Volt) control signal. This control signal can be generated via an external potentiometer or via an intelligent HVAC sensor. For more information, take a look at our HVAC control solutions.

Controllers for greenhouse industry
For the greenhouse industry, we offer fan speed controllers with integrated temperature probes. GTEE series control supply fan, exhaust fan and an electric heater to optimise the grow conditions in greenhouses. Via the product overview of variable speed controllers, you can discover our complete product range.

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