9 Alternator Components and Their Functions

The alternator is a part of a car that makes electrical currents for all the electrical components, including charging the battery.

The alternator is also one of the parts that make up the charging system.

 Components and Their Functions

The alternator’s job is to turn the mechanical energy from the engine into electricity. Later, the engine’s motion energy is connected to the alternator through the V-belt, and then the alternator pulley is connected to the alternator again.

The alternator can make alternating current (AC), which will then be changed into direct current (DC).

Several parts make up an alternator. But the size of the alternator must be changed to fit the parts that make it up.

The alternator has the following parts, and you need to know what each of them does:

1. Rotor Coil

 Components and Their Functions

The alternator’s magnetic field is created by the rotor coil, a moving part that spins. In the end, the magnetic field will become an electric current.

Because of this, an alternator must make a magnetic field from where the magnetic forces meet. Permanent magnets are used in the rotor coil of motorcycle alternators, so there is no need to make a magnetic field first.

Unlike the alternator in a car, the rotor coil is made up of coils that can produce a magnetic field when an electric current is passed through them.

The battery, an essential part of a car, is where the electric current comes from. The rotor is connected to the shaft of the alternator. When the shaft turns, so does the rotor, which moves the magnetic field.

The rotor coil is set up to turn in the same direction as the rotor. Slip rings connect the ends of the coil. The slip ring is usually made of white steel or stainless steel and has a smooth surface, so it doesn’t wear out quickly.

2. Stator Coil

 Components and Their Functions

The stator coil is a part of the motor that looks like a static coil. Its job is to catch the magnetic fields when they meet.

For an electric current with a specific voltage and direction to flow, the magnetic field made by the rotor coil must cross the coil.

Most of the time, the stator is outside of the rotor coil. There are only a few millimeters between the two.

So, the stator coil’s magnetic field can touch the stator coil. So that when the rotor is turned, the magnetic field will cross the stator coil.

The frame, made of copper wire with an insulator on the outside, protects the stator coil from the front and back. There are three free coils in the slots inside.

The core of the stator coil helps the magnetic lines of force that come from the pole core (magnetic core) to work better in the stator coil.

3. Brush

 Components and Their Functions

A brush or brush is a part of an alternator that looks like a small box and connects the rotor coil to the electric current. As everyone knows, the rotor needs electric current to create magnetism and turn.

But you can’t just use a cable to connect an electric current to an alternator. We need two brushes that press the slip ring to do this.

The two ends of the rotor coil are connected to the slip ring at the end of the alternator shaft. When the brush is connected to the slip ring, an electric current will flow to the rotor.

4. Alternator Shaft

 Components and Their Functions

The alternator or alternator shaft connects the pulley (pull) and the rotor component. So that the alternator pulley can be attached to the rotor and the rotor can turn, this is done.

5. Pulley

 Components and Their Functions

A pulley or pulli is part of an alternator used to get the engine’s rotation. The pulli are where the driving fan belt or belt goes. The v-belt gives the fan belt or belt rotary motion from the engine.

In technical terms, a drive belt wrapped around the crankshaft pulley turns the pulley. So, when the pulley on the crankshaft turns, the pulley on the alternator also turns.

6. Fan Alternator

 Components and Their Functions

When the alternator works, the fan inside it acts as a cooling coil inside the stator coil, the rotor coil, or the diode.

The fan is an essential safety feature that helps keep the alternator from getting too hot. If an alternator gets too hot, it will mess up the process of charging the electric current.

7. Rectifier

 Components and Their Functions

A positive diode and a negative diode make up the rectifier or diode, which is a part of the alternator. Each of the three diodes is held in place by a diode holder.

Later, the electric current made by the alternator will be sent to the diode, starting with the positive diode and going to all the ends of the isolated frame.

This diode changes the direction of alternating current (AC) to direct current (DC) (direct current). This is because the current from the stator coil is still alternating current (AC), but the alternator needs direct current (DC).

During rectification, these diodes can get hot and need to be cooled. A part called “diode holders” is required for this cooling to work. These holders radiate heat from the diode, so it doesn’t get too hot.

8. Alternator Housing

 Components and Their Functions

An alternator house is a place or frame that protects all of the parts of the alternator. An alternator has two frames, the front frame, and the end frame. Both of them do the same thing: to protect the alternator’s parts.

9. Bearing

 Components and Their Functions

The bearing is a part of the alternator that helps connect the shaft of the alternator to the frame of the alternator. Not only are bearings essential for the alternator, but they are also essential for all moving parts in any system.

Without the bearing, the way a shaft turns will be rougher and heavier, which will cause the shaft to wear out. There are two bearings on the front and back frames of the alternator.

These are some of the most important parts that an alternator has. Each part does something different and can’t be replaced by another part. The information above should be helpful and give you more information about alternators.