single phase power savings

[jjbeamish]

For Rving a single phase, not just for power saving but actual RV mode, you need to use ? the rated voltage. Easy to do. I have had single phase 1/3hp 1725rpm 120v motors running on 4watts. (dc to inverter, no power factor). HP rating is less but rpm is slightly faster then rated.

Jason

[Nali2001]

Hello Jason,
Can you please explain to me a bit more how you rv-ed a single phase motor?

Thanks in advance
Steven

[jjbeamish]

Hi Steven,
It?s pretty simple. Use a 4 to 1 trafo, 120vac in and 30vac out. Use a cap bank of 370v oil RUN caps. Put caps after trafo parallel to line and adjust to lowest current draw.

-------------                        --------       ---       ----------
Line in            [transformer]                Cap      cap              Motor
-------------                        --------       ---       ----------

Most small motors I have found have a start winding or capacitor that turns itself off after it is up to speed (centrifugal switch).

You know for sure you have RV effect when you have a higher circulating voltage Amperage between the cap bank and motor then you have watts from a battery to inverter. Also, a magnet vibrates violently 4? away from motor housing.

A single phase can work as alternator as well.

Jason

[ashtweth_nihilisti]

Thanks Jason have added that to the compilation.
here is a sch form the latest update.

[jjbeamish]

Just use the 1/4 voltage rule per Hector. I would guess you could also re wire it for 120v.