Brushless Type Generators

Brushless Type

Brushless Type generators are liquid cooled (coolant) and consist of the following main components:
- Generator Housing
- Stator Assembly
- Rotor Assembly

Generator Housing Water Cooled







The Water Cooled Generator is housed in an encapsulated metal shell enclosure. The enclosure is insulated an aluminum shell.
The space between the inner surface of the shell and the outer surface of the generator creates a water jacket that engine coolant flows through. Coolant flows from the engine into the shell through internal ports and exits via hose connections.

Liquid cooling minimize noise generator through elimination of generator cooling fan

Stator Assembly
Although different in appearance the Stator Assembly in a brushless generator performs the same functions as the brush type.

Rotor Assembly




The brushless generator Rotor does not contain the field coil. The pole-finger crowns rotate around a fixed field coil and are magnetized by the flux field of the field coil.

The two crowns form claw-pole half sections and are retained by a non-magnetic ring positioned below the pole fingers.

Rectifier Assembly

The Rectifier Assembly consists of six diodes, a pair of diodes for each stator winding. Each pair contain one positive biased diode and one negative biased diode, By using a pair of diodes that are reversed biased to each other, rectification of both sides of the AC sine wave is achieved. The negative biased diodes allow for conducting current from the negative side of the AC sine wave and puffing this current into the circuit as positive current. The use of positive and negative biased diodes provide for full wave rectification because both halves of the sine wave are used.

Drive Belt

It is the function of the Drive Belt to transfer rotating energy from the engine to the generator. The drive belt rotates the rotor, spinning the magnetic field. A loose belt can inhibit charging system efficiency and a belt that too tight causes early bearing failure.