Motor type for grain mill?
I am planning ahead for when I motorise a Diamant grain mill and I would appreciate some clarification on the two main Capacitor categories that are offered for the sort of motors we would commonly use.
I have narrowed my search down to (probably) 0.5HP single phase, 4 pole for the Diamant (they advise 0.5HP as a minimum) but have the choice of permanent capacitor or cap start/cap run and I don't know which is advised for grain mills.
I do know that the cap start/cap run motors can draw a high current at startup and I wondered how you deal with that current draw. Some 0.5HP motors were drawing more than a household 13A fuse at startup.
If it helps, I am in the UK so 240V 50Hz.
The next question will be reduction... the Diamant flywheel is 16" so I think the common 1500rpm motors would turn at 187rpm given a 2" on the motor and the 16" flywheel. Is that correct? I would prefer something in the range of 75-90rpm. How would you handle it? A gearbox or a second pair of pulleys?