Thread: Idiots Guide To VFD/VSD

Hi SS
Your right, remove the old motor and all electrics and replace with a single phase motor and switchgear.(keep same speed and shaft size)
I'm inclined to think 3hp should be ok as my SCM jointer is 2.5hp single phase and does the job easily.(make sure you get a real 3hp motor, some places in China have very small horses)
You would be wise to have overload and under voltage protection in your switchgear, you may also need an emergency stop button located remotely on the machine somewhere.
Your motor supplier should be able to advise you on this.
In general 3 phase motors have higher starting torque, not much of an issue here as the jointer does not start under load.