Description & Operation
The charging system includes a battery, generator with a internal regulator, charge warning indicator and wiring. The generator has eight built in diodes (4 positive and 4 negative), each rectifying AC current to DC current. Therefore, DC current appears at generator "B" terminal. In addition, the charging voltage of this generator is regulated by the battery voltage detection system. The main components of the generator are the rotor, stator, rectifier, capacitor brushes, bearings and "V" ribbed belt pulley. The brush holder contains a built in electronic voltage regulator.
The generator produces AC voltage in its windings as it is belt driven by the engine. The rectifier converts this AC voltage to DC voltage. The voltage regulator, a component which is built in to the generator frame, has a primary function of controlling the generator's output to meet electrical system requirements. The regulator also controls the charge warning indicator. Fuse No. 2 supplies battery voltage to the charge warning indicator. With ignition ON and engine OFF, terminal "L" of the regulator is grounded internally and the charge warning indicator lights up. See Fig 1. A small amount of current provided by both the charge warning indicator and the pre-excitation resistor is used to excite the magnetic field windings to start the charging process. With the engine running and the generator charging, terminal "L" voltage rises and the charge warning indicator goes out. If the generator fails to charge, terminal "L" remains below battery voltage and the charge warning indicator remains lit.