- Joined
- Aug 26, 2013
- Messages
- 1,061
The thing i see about vfds is that they are portrayed as a silver bullet by a large segment of the general population.
Take this graph for a 60 htz (base motor speed) set up. If you slow the motor way down, you loose all your HP, and if over speed it up you lose all your tongue. This ignores the issue of if the motor can thermally handle really low hertz (low cooling), or physical handle high hertz (high rotational intertia).
Take this graph for a 60 htz (base motor speed) set up. If you slow the motor way down, you loose all your HP, and if over speed it up you lose all your tongue. This ignores the issue of if the motor can thermally handle really low hertz (low cooling), or physical handle high hertz (high rotational intertia).