Analogue input motor control
These electronic fan speed controllers are designed for continuous variable speed control of single- or three phase voltage controllable motors with a maximum current of 10 A. An analogue control signal is required as fan speed reference. The motor voltage is regulated in function of this analogue control signal. There are many possibilities to generate an analogue control signal. Following examples are commonly used in the HVAC industry: a control switch, a potentiometer, a transmitter, an intelligent sensor, etc.