Dynamos and alternators produce different currents, namely direct and alternating electricity. In other words D for direct, and A for alternating respectively. That part of electric generators should be easy to remember. We delve further into the topic in this article, in case you would like to know which generator type is best for charging batteries.
The Main Differences Between Alternators and Dynamos
Dynamos and alternators are both electricity generators, converting mechanical force into electrical energy using electro-magnetic induction. They do however differ in terms of design principles, and the type of current they produce.
How a Dynamo Is Different From an Alternator
A dynamo generates direct current using an electromagnetic induction process. Most dynamos comprise three assemblies, namely:
- Stator containing a magnetic field produced by electromagnets.
- Rotating part called a rotor which contains the coil or armature.
- Commutator and brush coil electrical connections, flipping AC to DC.
Magnetic field lines cut through the coil, as the rotor spins inside the stator magnetic field. This induces an electric current, which the commutator and brushes change into a direct current, flowing in one direction.
How a Alternator Is Different From an Dynamo
An alternator is the same thing as an alternating current generator. It delivers alternating electricity by turning a coil inside a magnetic field. Most alternators comprise three assemblies, including:
- Stator containing a magnetic field produced by electromagnets.
- Rotating part called a rotor which contains the coil or armature.
- Slip rings and brushes sending electric current to the rotating coil.
Magnetic field lines cut through the coil, as the rotor spins inside the stator magnetic field. An alternating current flows through the coil, changing direction relative to the magnetic field. The slip rings and brushes maintain a continuous electrical connection, releasing alternating current to an external load.
Which Generators Are Best for Charging Batteries?
Batteries store, and deliver direct current, although their actual energy depends on their chemistry and state of charge. Therefore, you should not attempt to connect batteries directly to either type of generator. Always use a correctly-rated battery charger able to accept the input from the particular source.
More Information
Alternating Between Types of Electric Current
