Starters and alternators.pdf

(1325 KB) Pobierz
Getting to know
Starters
and
Alternators...
Copyright © 2010 Autocosmosbiz (Pty) Ltd
Version 1.0
Starters and Alternators
Definitions...
What is a Starter?
“A
starter
(also
starting motor,
or
starter motor)
is an electric motor that rotates an internal combustion
engine to cause the engine to begin powering itself”
OR
“A starter is an electric motor needed to turn over the engine to start it”.
When current from the vehicles battery is applied to the solenoid of the starter, usually through the
ignition switch, it pushes out the bendix-drive on the starter driveshaft and meshes the bendix-drive with
the ring gear on the flywheel of the engine. At this point the circuit is closed between the main contacts
of the solenoid and the electric starter motor starts running and turns the engine to start...
What is an Alternator?
“An Alternator charges the battery, to power a car's electric system, when the engine is running”
OR
“An alternator is part of the charging system of your car that produces electricity for many devices”.
When the engine is running, the alternator belt spins the pulley of the alternator. The rotor inside the
alternator then spins inside a stationary 3-phase stator creating Alternating Current (AC). The rectifier,
through a series of diodes, converts the Alternating Current (AC) to Direct Current (DC). The voltage
needed is regulated by the regulator. The Alternator constantly charges the battery which stores current
for the vehicles electrical components to run from.
Copyright © 2010 Autocosmosbiz (Pty) Ltd
Types of Starters
There are different types
of Starters,
Mainly:
DD
PLGR
PMGR
PMDD
OSGR
Direct Drive
Planetary Gear
Permanent Magnet
-
Gear Reduction
Permanent Magnet
-
Direct Drive
Off-Set Gear Reduction
The Components differ between the different types...
Copyright © 2010 Autocosmosbiz (Pty) Ltd
Direct Drive (DD)
A Direct Drive Starter implies the Drive, Armature,
Field Coils, Brush Holder, etc are in-line and the
Drive runs Directly on the Armature...
Drive End
Bracket
Bendix-Drive
Solenoid
Fork
DE Bush
Yoke
Dust Cover
Typical Kit
Armature
Brush Holder
Field Coils
(Fits in Yoke)
Comm End
Bracket
CE Bush
Copyright © 2010 Autocosmosbiz (Pty) Ltd
Planetary Gear (PLGR)
A Planetary Gear Starter’s Bendix-Drive runs on
a Shaft that is Driven by the Armature with Planetary Gears.
The use of Planetary Gears enhances torque dramatically.
This starter still has normal Field Coils in the Yoke.
Plunger
Drive End
Bracket
DE Bush
or
Solenoid
Fork
Planetary Gear and
Shaft (Complete)
Armature
Needle
Bearing
Bendix-Drive
Planetary Gears 3x
Dust Cover
Yoke
CE Bush
Field Coils
(Fits in Yoke)
Brush Holder
Comm End
Bracket
Typical Kit
Copyright © 2010 Autocosmosbiz (Pty) Ltd

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin