Is there a guideline to define the maximum permitted value of cogging torque produced by permanent magnet machines, as a function of their specifications (such as reted torque, power, etc) or their application?
I want to design a 12 kW (32 N.m rated torque) interior PMSM for automotive application. please mention the reference if possible.
Dear Amin,
This is rather hard to say, since it varies from application to application. You are talking about automotive, with such power and torque, I am not sure you are talking about the main propulsion engine, are you?
I tried to find similar case. I come up with one from a recent reference book:
ELECTRIC VEHICLE MACHINES AND DRIVES
DESIGN, ANALYSIS AND APPLICATION
K. T. Chau
International Research Centre for Electric Vehicles
The University of Hong Kong
© 2015 John Wiley & Sons Singapore Pte. Ltd.
He talks about a machine rated at 2.3 kW, 110 Nm, 200 rpm
Furthermore, the developed torque waveform of the motor drive at the rated condition is simulated as depicted in Figure 8.21. It can be found that the average torque of this machine can achieve 113Nm, which is sufficiently high for in-wheel EV direct drive. Meanwhile, the corresponding torque ripple is about 11.8%, which is very acceptable for EV propulsion. Such torque ripple is mainly due to the cogging torque of this machine.
If you want to give a bit more details about your application, I can try to find more relevant data.
Cheers,
Guillaume
check this links maybe help you
http://www.eejournal.ktu.lt/index.php/elt/article/viewFile/3248/2257
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