There are several types of brushless alternators. The best
choice depends on the required output power, nature of the
driving force, and weight/space limitations.
All Sullivan alternators use rare earth magnets for high power
density. They have no brushes or slip rings to wear, and they
have few or no moving parts, so they have very low noise and
excellent reliability.
All of these alternators produce single or multiphase AC voltage.
Mated to a voltage regulator, they can deliver a variety of
DC voltages.
Alternator Type
Description
Face type Alternators
Power: 5W to 15W
Cost per watt: highest
Grams per watt: highest
Moving parts: none
Engine range: 4cc to 50cc
Ideal for small engines and low power
Coreless
Alternators
Power: 20W and up
Cost per watt: medium
Grams per watt: high
Moving parts: sealed ball bearings if required
RPM range: 200 to 2000
Cogless design is ideal for wind or water power
Reverse
Pancake Alternators
Power: 30W to 150W
Cost per watt: low
Grams per watt: low
Moving parts: a sealed ball bearing (or none)
Engine range: 25cc and up
A good choice for moderate power from larger engines,
or power from non-engine shafts
Pancake Alternators
Power: 50W and up
Cost per watt: lowest
Grams per watt: lowest
Moving parts: a sealed ball bearing (or none)
Engine range: 25cc and up
The best choice for maximum power density or large
output
