G3 All Electric HP 129.6, Theoretical Max 103 MPH Math

Dec 2019


129.6 HP all Electric in a Prius G3 Conversion
REMOVING ICE or cutting drive to ICE
using EXISTING electric motor(s) and EXISTING inverter(s)
(Better) Batteries not included

Theoretical Maximum
MPH of G3 P410 all Electric Conversion is 103 MPH

103 MPH

1)
M2 to shaft ratio in G3 P410 is 8.6 to 1
according to professor Kelly of Weber State.
reff

2)
195r15 is approx 1.81 meters or so circumference


3)
13500 rpm / 1.014 ratio MG1 to MG2 = 13130 max rpm not to over-spin MG1
The rpm of MG2 must be governed to max 13130 rpm
so maxing out MG2 at 13130 revs instead of 13500
because we cant over rev MG1 limit of 13500
It will cost us a little HP that we cannot tap in M2
If we use M1 as well
13500 rpm / 1.014 ratio MG1 to MG2 = 13130 max rpm not to over-spin MG1


therefore:

13130 rpm / 8.6 ratio to wheel shaft = 1,527 wheel turns per minute
1,527 wheel turns per minute * 1.81 meters approx wheel circumference = 2,763 meters / minute
2763 meters / minute * 60 minutes = 165,780 meters / hour
165,780 meters / hour / 1000 meters = 165.8 Kilometers / hour
165.8 Kilometers / hour / 1.609344= 103 MPH
103 MPH Maximum

accessible HP is not 80
13500 rpm / 13313 max rpm = 97.2 Percent of Capacity
.972 * 80hp = 77.6 hp from MG2
After governing M2's 80 hp
we can have available 77.6 hp from M2 AND 57 hp from M1
for a total 129.6 HP ALL ELECTRIC
if MG1 spinning at max 13500 and MG2 spinning at max 13130 rpm

(Assuming my updated battery pack has the power)
that is
129.6 HP all electric from a G3 folks!

129.6 HP

Interestingly this mod if applied to G4 could
ONLY yield 103 hp from MG1 and MG2
(72hp mg2 and 31hp mg1)


Dec 2019
Ive got a thread here for my conversion for a DIY enthusiast
if anyone is interested

Converting Prius G3 to all Electric removing ICE | PriusChat


I'm wondering if I missed anything above
or what is wrong
I might have the ratio direction backward
and I think "pushing" torque
may add a few hundred more RPM delta
for another few 1 or 2 of HP loss

There was a comment by Kelly that they would lock
if spun at exactly the same speed
otherwise its variable.
(I don't understand how it would lock)

Surely i will know from the real world
playing soon enough

Thank you

 

i learned the gear calculation above is needed for g2
but NOT for g3 as no motor gets to its rpm limit