Suppose that a shunt-connected machine operates at 800 rpm
Chapter 16, Problem P16.68(choose chapter or problem)
Suppose that a shunt-connected machine operates at 800 rpm on the linear portion of its magnetization characteristic. The motor drives a load that requires constant torque. Assume that RA = 0. The resistances in the field circuit are RF = 50 and Radj = 25 . Find a new value for Radj so that the speed becomes 1200 rpm. What is the slowest speed that can be achieved by varying Radj?
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