What is a variable frequency drive? Heating, ventilation, and air conditioning systems' air supply used to be constant volume into a space. Now a variable air volume control is being used to provide ...

What is a variable frequency drive, and how does it work? A variable frequency drive controls the speed of an AC motor by varying the frequency and voltage supplied to the motor. They work by taking ...

The most important variable when matching sensors to transmitters is basic compatibility: the sensor's output must be acceptable as an input to the transmitter. Transmitters most commonly accept ...