That is, too small in terms of their power rating, which for most applications is a perfectly acceptable way of selecting the right size motor. But not all.
For example, small, precision pumping applications, such as dosing ingredients in the food industry, would typically use an induction motor and inverter. More often than not, the pumps would be operating at a fixed speed and the motor-inverter combination would be selected on that basis.
Read the full article in the January issue of DPA