Frequency Spectrum of the Generated Voltage of Claw Pole Automotive Alternators on No Load

The harmonic spectrum of generated voltage in claw pole automotive alternators has to be examined since the load components in future automobiles have to be rated for over-voltages and transients. The present work gives a new 3D finite element modeling and simulation along with a conventional analysis supplemented by experimental work on a 12 pole claw pole alternator. Further work is indicated for a shape search to optimize the claw pole profile.