Solved: A permanent-magnet automotive fan motor draws 20 A
Chapter 16, Problem P16.47(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). a. Find the armature resistance. b. Find the maximum developed power that this motor can produce when operated from a 12-V source. c. Repeat part (b) for operation at 10 V (this represents a nearly dead battery) and at 14 V (this is the terminal voltage during charging of the battery after the engine is started).
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