User’s Manual for Advanced Axial Flux Synchronous Motors and Generators
www.emrax.com Version 4.5 / January 2017 53
Customer has battery voltage 365 Vdc at load.
228 MV motor can deliver 11 to 14 RPM per 1 Vdc at no load. At full load it can deliver 11 RPM/1Vdc.
This means that you can get
only.
Therefore at 180 Arms peak from controller from Bamocar D3, the motor power is:
This is the maximum which you can expect with this controller.
If you
want more power you need higher dc voltage to get higher RPM and also higher motor current. You need
app 280 Arms peak (which gives app 230 to 240 Nm of torque). So if you can increase the current you will be
closer to 100 kW. But we recommended that you increase the battery voltage to get higher RPM and
consequently higher power.
21. Usage of EMRAX motors for electric vehicles (EV)
How to calculate power and torque for EV?
1. First you have to calculate the torque that will be needed for the vehicle (torque on the wheels):
Example:
Acceleration:
Force for acceleration:
Torque on the wheels (wheel diameter 0,64 m):
3000 Nm is a torque on the wheels, which is needed to accelerate the vehicle (EV weight is 1700 kg) from 0
km/h to 100km/h.
2. Now you need to consider the transmission gear (TG) ratio and calculate the torque:
Example:
Differential ratio is approximately 3:1, TG ratio is approximately 4:1. Therefore total ratio in the first
gear is:
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