Doctorbass
100 GW
From the project of this original thread: ZERO XU 2013 to 50hp ZERO FX conversion
https://endless-sphere.com/forums/viewtopic.php?f=10&t=115877
I have made some calculations about the motor rewind.
This 75-X plateform ( 75-7 and 75-5) seem to have 6 turns per tooth. I know that the 66V hybrid version of the 75-7 is having 4 turns per tooth and not 6. ( This hybrid have been offered to old 2012 Zero owners for replacing the me0913 in the past)
DATA:
Also i have the info that the 4 turns saturate at 1200A and the 6 turns saturate at 800A
The 6 turns have 24 strands of 18 gauge. I guess that the 4 turns should have 32 parallel strands to keep the same copper fill.
The 4 turn is for 66V and the 6 turn is for 102V
That's 17 Volt per turns
If i want to run 74V then in theory i would need 4.35 turns, and it's not possible as turns must be integer number usually (i think)
So i would need to keep 4 turns and the motor would be 68V nominal ( 17 x 4 = 68)
I would probably need a bit less field weakening then to run it 6500rpm using 74V nominal battery
So.. for 4 turns i would need 32 strands of 18 gauge.. But i dont have 18 gauge in stock..
I only have 14 gauge.
So.. I would need 12 or 13 strands of 14 gauge to be equivalent to the calculated 32 stands of 18 gauge..
( Equivalent to one gauge 3)
My question: is there any disadvantage to rewind a motor with larger diameter strands?
Doc
https://endless-sphere.com/forums/viewtopic.php?f=10&t=115877
I have made some calculations about the motor rewind.
This 75-X plateform ( 75-7 and 75-5) seem to have 6 turns per tooth. I know that the 66V hybrid version of the 75-7 is having 4 turns per tooth and not 6. ( This hybrid have been offered to old 2012 Zero owners for replacing the me0913 in the past)
DATA:
Also i have the info that the 4 turns saturate at 1200A and the 6 turns saturate at 800A
The 6 turns have 24 strands of 18 gauge. I guess that the 4 turns should have 32 parallel strands to keep the same copper fill.
The 4 turn is for 66V and the 6 turn is for 102V
That's 17 Volt per turns
If i want to run 74V then in theory i would need 4.35 turns, and it's not possible as turns must be integer number usually (i think)
So i would need to keep 4 turns and the motor would be 68V nominal ( 17 x 4 = 68)
I would probably need a bit less field weakening then to run it 6500rpm using 74V nominal battery
So.. for 4 turns i would need 32 strands of 18 gauge.. But i dont have 18 gauge in stock..
I only have 14 gauge.
So.. I would need 12 or 13 strands of 14 gauge to be equivalent to the calculated 32 stands of 18 gauge..
( Equivalent to one gauge 3)
My question: is there any disadvantage to rewind a motor with larger diameter strands?
Doc