Sunday, November 2, 2014
Inverters can be adapted from stall right up to CHP ranges, only design limits are feedback device and proper cooling aspects to the machine load profile. Some applications require extended low speed performance. Normally the variable frequency drive (VFD) supplier indicates speed range capability based on type of VFD and feedback device required.
There may be some confusion between frequency and motor speed.
Open loop, typical speed regulation is plus or min ...