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