Overview
A large inrush
current is usually required when an AC motor is accelerated to full
speed while using a full voltage connection. In addition, the torque
of the AC motor is pretty much uncontrolled and may shock the
equipment that is connected, hence causing damage. Viable frequency
drives and soft starters are equipment designed to reduce limit
torque and inrush currents, protecting expensive equipment and
extending the life of the motor as well as coupling devices.
Whether you need to
buy a soft starter or a variable frequency driver will mostly
depend on the type of your application. Also on your mechanical
system requirements and cost.
