From the industrial world news

Motor Control with Variable Frequency Drives (VFD Inverters)

Starting industrial electric motors directly from the power grid can cause sudden voltage drops in the electrical network and significantly increase mechanical wear on drive systems.To eliminate these problems and control motor speed and torque, motor inverters, also known as frequency converters, are widely used.If you want to fully optimize industrial control processes in your factory, these devices should be among the first solutions included in your list of industrial automation equipment.