Alternator is bolted to the engine
Crankshaft
Crankshaft
2020-05-09
Starter
Starter
2020-05-07

Alternator

Shock Absorber Introduction

An alternator is a generator of electric power in a car and is a major component of the vehicle's charging system. All cars with an internal combustion engine except for some hybrids have an alternator. When an engine is running, the alternator charges the battery and supplies additional electric power for the vehicle electrical systems.
An alternator is bolted to the engine and is driven by a serpentine belt (drive belt).

What do Alternator do?

An alternator works with your battery to supply power to a vehicle’s electrical system by converting mechanical energy to electrical energy while the engine is running. Alternators may wear down over time and a failing alternator can impact your car in many ways.
You may think that the battery powers the electrics in your car, but that’s not the case. The battery provides electricity needed for the starter motor to start the car. When the car is running, the alternator generates energy to feed the electrical system and charge the battery. The alternator used to be called a generator, and it works in a similar way. In this case, a car’s internal combustion engine spins pulleys under the bonnet, which turns the pulley on the alternator and creates energy.

Alternator Picture

Alternator components & their functions

Regulator
The voltage regulator controls the amount of power distributed from the alternator to the battery in order to control the charging process. Regulators are designed with different functions and work depending on their specification.
Rectifier
The rectifier is used to convert current from alternating current (AC) to direct current (DC) during the charging process.
Rotor
The rotor is the spinning mass inside the alternator that rotates via the pulley and drive belt system. The rotor acts as a spinning electromagnet.
Slip Rings
The Slip rings are used as a means of providing direct current and power to the rotor.
Slip Ring End Bearing
The bearings are designed to support the rotation of the rotor shaft.
Stator
The stator consists of several coils of wire wound through an iron ring. The stator sits outside the rotor, when a magnetic field is created the electrical current is made.
Drive End Bearing
The bearings are designed to support the rotation of the rotor shaft.
Pulley
The pulley is connected to the rotor shaft and the drive belt system. Rotation created by the engine the drive belt system turns the pulley beginning the charging process.

Problems encountered by alternators

The most common symptom of a problem with your vehicle's charging system is a battery-shaped warning light or the "CHARGE" icon that comes on while driving. Normally this warning light should come on when you turn the ignition, but should disappears as soon as the engine is started. If it stays on, there is a problem with your charging system.
indicates a problem with a charging system The charging system warning light doesn't point directly to a failed alternator, although alternator problems are very common. Your mechanic will need to do further testing to pinpoint the defective part.
Another symptom of a weak charging system is when the dash lights and headlights dim at idle, but become brighter when the engine is revved. This problem could be caused not only by a weak alternator, but also by a failing battery, poor connection at the battery terminals or a loose serpentine belt. A whining/buzzing noise coming from the alternator is another symptom of alternator troubles. In some cars, it could be caused by a noisy alternator bearing.vehicles a bad alternator decoupler pulleycould cause the same noise.
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