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A 440-V, 60-Hz, six-pole, wye-connected, wound-rotor induction motor with a full-load speed of 1170 r/min has the following per-phase parameters referred to the stator:R1 = R'2 = 0.5, Xl1 = Xl2 = 2 , Xm = 40 , and a stator-to-rotor turns ratio of 2.5.
The scheme of Figure is employed for speed control with Rd = 0.02 and R = 1. For a speed of 1000 r/min at 1.5 times the rated torque, find the duty ratio δ, neglecting friction and windage, and using the equivalent circuit with jXm moved adjacent to the stator terminals.
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following on from the first tma in this module, produce a design report for one design of the product based on one of the scenarios covered on the following pages.
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