IDA

Invertek Drives unveils new variable frequency drive for hybrid and high-efficiency motor control

A variable frequency drive (VFD) is an electronic device that controls the speed of AC induction motors. Before we look at how this works and how it can be used, we should look at the history of motor controllers, and also how the induction motor itself works.

Let’s look at how to choose and install a drive. You can choose a drive based on the power and voltage of the motor you are using. Make sure the motor is correctly configured (star or delta) to match the supply. Check the full load current of the motor and the variable frequency drive; sometimes you can choose a lower power drive; it’s the current that matters.

When Cranes lift a load, they are doing work; when they lower a load, the energy is coming from the load to the drive, that is, the load is regenerating. An elevator usually has a counterweight, so it is not always clear if the system is motoring or generating. These applications nearly always work with a drive fitted with a braking resistor to absorb the regenerative energy.