A permanent-magnet automotive fan motor draws 20 A from a
Chapter 16, Problem P16.44(choose chapter or problem)
A permanent-magnet automotive fan motor draws 20 A from a 12-V source when the rotor is locked (i.e., held motionless). The motor has a speed of 800 rpm and draws 3.5 A when operating the fan with a terminal voltage of VT = 12 V. Assume that the load (including the rotational losses) requires a developed torque that is proportional to the square of the speed. Find the speed for operation at 10 V. Repeat for 14 V
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