How to dimension a variable speed drive

Correctly dimensioning a variable speed drive (VSD) helps improve an application’s reliability. But getting it right depends on many factors relating to the machine or process in which the VSD is going to operate. It is important that the VSD is correctly selected, taking into account the actual application, the load and the environmental conditions. If the ratings are above a maximum ambient temperature of 40°C, you may need to derate the VSD. How to…