5.5Kw 3ph motor off a single ph supply

[spudulike]

Look at invertors, they are a box of tricks that let you ramp up a motor over a predetermined time to give you the motor speed you desire and the same on shutdown. I got involved with them on manufacturing machinery some 20 years ago and they were somewhat interesting once you understood what they did and how they worked.

The start up of the motor takes the juice so you need it to be slow and controlled.

[difflock]

3 hours ago, Conor Wright said:

They already do that with large motors being run on generators. Not sure how though, seen a big old sawmill coming to life on a phased start-up, impressive stuff.. It came up to speed over about a minute, but it put the gennie into full Volkswagen mode, black smoke a fiat 11090 would be unable to achieve! Once up and running there was no sign of pressure on it.

That is another "project" for me to sort out, some day, getting the 30HP DOL motor (+ another 10HP motor on the hyd power pack) on the Baker bandsawmill to run off a reasonable sized genny, without prematurely knackering the genny's engine due to spending a lot of its time little more than ticking over.

Fingers crossed(while I still got them to cross)

Just need to find an electrician first!

Edited March 10, 2019 by difflock

[gensetsteve]

Go for a soft start on an inverter or star delta starting panel use a smaller generator so that it has more load when up to speed. 

Houses have 8 kw showers why not bigger motors ?