Three phase motors (project)

[zeevalentino]

Hi guys. I m in a bit of bother reguarding a project i have to do on three phase motors reguarding refrigeration and speed control. It can only be 2000 words but with such a massive topic i dont even know where to begin. Any help or suggestions would be greatly appreciated (maybe and previously composed project);).

[fridge doctor]

Hi,

Keep it simple :

1/ If 3 phase is available on site - always use it because it is generally speaking more reliable, and certainly more energy efficient.
2/ Control of motor speed on 1 phase motors is notoriously complicated and expensive, and can be much more easily achieved with 3 phase motors - reasons for this can be found on internet.

[lowcool]

vsd's,pulleys,unloaders happy googling

[hannesvr]

go to danfoss speed drives

[salamander]

The best use of VFD's for refrigeration control that I have seen is on the Frick Vyper controllers. Saves mega kWh when condensers and controlled as well.