Performance

Calculations:

L = N² x A_L = 36²turns x 37nH/turn = 48µH

Testing:

50A step response:

L = 118V / (23.4A / 10 µS) = 50µH

100A step response:

Start of step (10A) L = 118V / (45.3A / 19.2µS) = 50µH

End of step (115A) L = 118V / (35.9A / 12.4µS) = 40µH

120A Step response:

Start of step (10A) L = 118V / (54.7A / 23.8µS) = 50µH

End of step (150A) L = 118V / (54.7A / 13.8µS) = 30µH

The decay of inductance with increasing current is gradual and continuous, unlike the ferrite cored CSIRO inductors. This gradual decay presents no major problems for the WaveSculptor current control loop maintaining control of the motor phase current.