80 2x7 delta rewire

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glennc
Newbie

Joined: 20/02/2023
Location: New Zealand
Posts: 2
Posted: 03:12am 20 Feb 2023      

hi there
does anyone have a diagram to rewire a smartdrive 42 pole 80 series to
80 2x7 delta
i have been reading up on powerspout ect and by the look at 1532rpm on a hydro unit this should produce 1160w is that correct?

open to any thoughts or suggestions on this,
seems the link on here to the rewire page is not currently working for me.

i have a couple of options wired up at the moment 42 pole 7x2c delta and 42 pole 7x2c star
the install location is remote so wanted to be covered .

thanks
Glenn
Willis Inc.
Newbie

Joined: 20/03/2023
Location: United States
Posts: 1
Posted: 07:50pm 20 Mar 2023      

Glenn
Search this site for (F&P stator rewiring). That has the info your looking for.
Good luck.
Willis
Edited 2023-03-21 06:32 by Willis Inc.
Ajarvis8
Newbie

Joined: 04/05/2024
Location: United States
Posts: 3
Posted: 11:02am 04 May 2024      

Glennc, what did you decide and how did it work out?

I built a hydro unit for a friend, it's wired 7X2C Star.  When running I'm getting 90V, it's to high to use as is, I'm wonder what my options are?

Would wiring to Delta give me lower voltage given the same RPM??

https://photos.app.goo.gl/7qSmnqjy54RDsan1A

https://photos.app.goo.gl/9DXViamoAyyG9xabA
Ajarvis8
Newbie

Joined: 04/05/2024
Location: United States
Posts: 3
Posted: 01:54pm 06 May 2024      

Looking up some videos on wiring generators Delta will have a √3 increase current and therefore a √3 decreased voltage.   Giving me roughly 52v assuming everything else is constant.  

Do I have that correct?
glennc
Newbie

Joined: 20/02/2023
Location: New Zealand
Posts: 2
Posted: 05:52pm 08 May 2024      

Ajarvis8
What voltage are you running in battery's? 24?

I have mine as delta 7x2c with a water pressure of 150psi
The voltage freespooling is up around 120v
But under load on a 24v system it works perfectly.
The out put is approx 1000w and has been working flawlessly.
You will need a controller to dump excess power.
But it has been running a house now for approx a year with no issues
Ajarvis8
Newbie

Joined: 04/05/2024
Location: United States
Posts: 3
Posted: 10:55am 09 May 2024      

No batteries planned yet. This will be a load sensing grid tied setup. The 90v was with a 600w load.  We are going to increase the load to over 1000w and remeasure the voltage, but the plan is to require to Delta reddit Electrical engineering has confirmed it should give me 58% of the current voltage.

The inverter we are planning will have a dump resistor.