The induction motor is operated at 60 Hz (natural torque-speed characteristic) [46].
a)
(E6.8-1)
b)Due to constant flux control, the (ωm–T) or the (s–T) characteristic consists of a family of parallel lines as indicated in Fig. E6.8.2.The maximum torque Tmax and the slip sm where the maximum torque occurs are [46]
Figure E6.8.2 (ωm–T) or (s–T) characteristics for frat = 60 Hz (natural characteristic) ...
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(E6.8-1)