• (p. pr. & vb. n.) of Cog
variation in speed of a generator due to variations in magnetic flux as rotor poles pass stator poles. Cogging in permanent magnet generators can hinder the start-up of small wind turbines at low wind speeds.
The reducing operation in working the ingot into a billet by the use of forging hammer or a forging press.
The cyclic physical resistance felt in some alternator designs from magnets passing the coils and gaps in the laminates. Detrimental to Start-up.