The excitation current is fed into the excitation winding through carbon brushes and slip rings. This creates a magnetic field.
The position of the magnetic field relative to the stator winding is constantly changing in accordance with the rotation of the rotor. In this case, a three-phase current appears in the stator winding.
But since the battery can only be charged with direct current, the three-phase current is converted by the rectifier located on the diode board into direct current. The voltage regulator changes the charge current according to the degree of discharge of the battery by turning the excitation current on and off. At the same time, the voltage regulator maintains a constant operating voltage (about 14V), regardless of the speed.
When working on the generator, certain precautions must be followed to prevent damage to the electrical system. Complete disassembly and reassembly of the generator must be carried out in a workshop.
- Observe the procedure for connecting an additional battery, for example, to force the engine to start.
- Do not disconnect the battery while the engine is running.
- Do not short the generator and voltage regulator terminals.
- Do not connect the generator wire to the regulator terminal and vice versa. In order not to confuse these wires, mark them with tape when disconnecting.
- Be sure to disconnect the wires from the battery and voltage regulator when performing electric welding.