The alternator is mainly composed of multiple permanent magnets (called rotors) with alternating north and south poles made of magnetic materials and armature coils (called stators) made of silicon cast iron and wound with multiple series coils. Working principle of power generation: the rotor is driven by the diesel engine to cut the magnetic field lines axially, the alternately arranged magnetic poles in the stator form an alternating magnetic field in the coil iron core, the rotor rotates once, the direction and size of the magnetic flux change many times, due to the transformation of the magnetic field, Induced currents of varying magnitude and direction are generated in the coils and delivered by the stator coils.

The rotation of the crankshaft of the diesel engine drives the generator to rotate and generate electricity. The generator includes a DC generator and an AC generator.

The DC generator is mainly composed of a generator shell, a magnetic pole core, a magnetic field coil, an armature and a carbon brush. Working principle of power generation: When the diesel engine drives the generator armature to rotate, due to the residual magnetism of the magnetic pole core of the generator, the armature coil cuts the magnetic field lines in the magnetic field. According to the principle of electromagnetic induction, the magnetic induction generates current and outputs the current through the carbon brush. .

In order to protect the electrical equipment and maintain its normal operation, the current sent by the generator also needs to be adjusted and controlled by a regulator.