Hi Guys,
After review of several videos and electronic vehicles, I have some questions and may be you can help me with them.
For a long time I was thinking that Tesla produce the best electric motors for e-vehicles (AC Induction). Recently I found YASA motors (http://www.yasamotors.com/) with incredible axial-flux motors. Below is a table that I created to compare Tesla motor vs. YASA motor:
These numbers have raised important questions to me:
So I will be glad if someone can validate my findings and comment factor is the most important to consider on electric motors for EV.
Thank you
After review of several videos and electronic vehicles, I have some questions and may be you can help me with them.
For a long time I was thinking that Tesla produce the best electric motors for e-vehicles (AC Induction). Recently I found YASA motors (http://www.yasamotors.com/) with incredible axial-flux motors. Below is a table that I created to compare Tesla motor vs. YASA motor:
Company / Motor | Motor Weight (kg) | Peak Power (kW) | Continuous Power (kW) | Peak Torque (Nm) | Continuous Torque (Nm) | Voltage (V) | Max. speed (rpm) | Nominal speed (rpm) | Efficiency (%) | Peak power density (kW/kg) |
Tesla | ||||||||||
2015 Tesla Model SP | 68 | 375 | n/a | 600 | n/a | 320 | 15 300 | 0-5100 | 5.5 | |
2015 Tesla Model S85 | 68 | 285 | n/a | 440 | n/a | 320 | 14 800 | 0-5800 | 4.2 | |
2012 Tesla Model S60 | 50 | 225 | n/a | 430 | n/a | 320 | 14 200 | 0-5000 | 4.5 | |
2007 Tesla Roadster | 32 | 225 | n/a | 370 | n/a | 240 | 14 000 | 0-5400 | 7.0 | |
2007 Tesla Roadster Sport | 32 | 223 | n/a | 400 | n/a | 240 | 14 000 | 0-5100 | 7.0 | |
YASA Motors | ||||||||||
Custom Motor | n/a | 800 | 400 | 4 000 | 1 000 | |||||
YASA-750 | 33 | 100/200 | 90 | 790 | 400 | 350/700 | 3 250 | 0-2500 | >95% | 6.0 |
YASA-P400 Series | 24 | 160 | 100 | 390 | 300 | 700 | 7 500 | 0-4800 | 96% | 7.4 |
YASA-400 | 24 | 90/165 | 50/70 | 360 | 250 | 350/700 | 7 500 | 0-4500 | >95% | 7.5 |
- Is peak power density is the most important factor for EV electric motor?
- I think that we should look at Peak Torque and Peak Power combination of factors. I mean the best electric motor is a motor with low Peak Power, which means low energy consumption, and high Peak Torque, which means strong driving characteristics.
- As I understand, Voltage is also important because if we apply high voltage we will get higher Peak Power and as a result higher Peak Torque. The main problem is that high voltage controllers/invertors cost much more then low voltage (for example 350 VCD vs. 700 VCD).
So I will be glad if someone can validate my findings and comment factor is the most important to consider on electric motors for EV.
Thank you