A
generator, which is an indispensable part of every car, consists of a
rotor, a stator, a rectifier and an end cap. It is not only an
application. In the car, in the national defense science and technology, industrial
and agricultural production and other fields also has a very wide range
of applications.
Automotive
generators according to their current characteristics can be divided
into different DC generators and alternators, with the development of
the times, alternator generators more obvious advantages of the
generators, making the DC generator is gradually being eliminated, and
now in the market It is difficult to see the figure of the DC generator. The
alternator has evolved and has evolved into a variety of types, which
can be divided into ordinary alternators, integral alternators, pumped
alternators, brushless alternators, and generators based on the overall
structure Magnetic
alternator, etc .; according to the different structure of the
rectifier can be divided into six tubes, eight tubes, nine tubes, eleven
tubes of alternating current generator; according to the different form
of magnetic field winding sub- Ground alternator.
We then take the overall alternator as an example to explain the principles of automotive generators.
At
first, when the switch is closed, the battery is powered by the battery
to run, follow the battery cathode → charging indicator → regulator
contact → excitation → grounding → battery → battery negative circuit
makes the battery discharge, and the indicator light. But
with the engine start, the generator speed gradually increased, when
increased to its output voltage is equal to the battery voltage, the car
power supply state conversion, converted to the generator for the car
to provide energy, and indicator light off. The
external circuit through the brush makes the excitation winding power,
generate magnetic field, the claw pole magnetization to the N pole and S
pole, so the rotor rotation process, the magnetic flux alternately in
the stator winding, resulting in alternating induced electromotive force
(based on electromagnetic induction Principle), which can be normal power generation.