Table of Contents
- 1 What produces the magnetic field in an alternator?
- 2 What is the purpose of the rotor in an alternator?
- 3 What effect does the rotating magnetic field have on the rotor?
- 4 What is the field in an alternator?
- 5 Which component inside the alternator uses magnetic induction?
- 6 What are types of rotors used in alternators?
- 7 Why do magnetic fields rotate?
- 8 What component in the alternator collects the magnetic field and turns it into voltage?
What produces the magnetic field in an alternator?
The rotor’s magnetic field may be produced by permanent magnets, or by a field coil electromagnet. Automotive alternators use a rotor winding which allows control of the alternator’s generated voltage by varying the current in the rotor field winding.
What is the purpose of the rotor in an alternator?
Rotors are the moving part in an Alternator that have permanent magnets that move around the Stator’s iron plates to generate an Alternating Current (AC). Rotors require existing motion to function, so only once the engine or turbine is already running will a Rotor work with a Stator to provide a charge.
Does the rotor create a magnetic field?
Salient pole rotor Direct current (DC), from an external exciter or from a diode bridge mounted on the rotor shaft, produces a magnetic field and energizes the rotating field windings and alternating current energizes the armature windings simultaneously.
What effect does the rotating magnetic field have on the rotor?
The rotating magnetic field is produced radially around the rotor by the varying currents in the stator windings. The rotating magnetic field induces eddy currents in the squirrel cage’s vertical bars causing it to rotate. The rotation of the rotor and magnetic field are asynchronous.
What is the field in an alternator?
The field current is D/C, or direct current. In other words, the current flows in one direction only, and is supplied to the wire coil by a set of brushes and slip rings. The magnetic field produced has, as any magnet, a north and a south pole. The rotor is driven by the alternator pulley.
How does an alternator field work?
An alternator works together with the battery to supply power for the electrical components of the vehicle. The output of an alternator is direct current (DC). When the alternator pulley is rotated, alternating current (AC) passes through a magnetic field and an electrical current is generated.
Which component inside the alternator uses magnetic induction?
The rotor and stator of an alternator are a belt-driven group of magnets inside copper wiring that creates a magnetic field. The belt is driven by a pulley connecting to the engine, allowing the rotor to spin at a high speed, creating a magnetic field.
What are types of rotors used in alternators?
There are mainly two types of rotors used in construction of alternator:
- Salient pole type.
- Cylindrical rotor type.
How is rotating magnetic field produced in alternator?
A rotating magnetic field is generated when the magnet rotates, and the coil cuts the magnetic lines of force to generate an induced electromotive force, seeing figure 1. Mount the stator and coil on the periphery of the rotor, and a single-phase alternator model is formed, as shown in figure 3.
Why do magnetic fields rotate?
“Dynamics of an active magnetic particle in a rotating magnetic field”. Phys. Rev. E.
What component in the alternator collects the magnetic field and turns it into voltage?
A simple alternator has two magnetic poles that establish a magnetic field. The conductor (armature) rotates through this field to establish a voltage.