Types of alternators based on application
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Single-Bearing Alternators
In a single-bearing alternator, a single bearing supports the
alternator at the non-drive end. It has a single bearing on the main,
non-drive shaft, which holds the exciter rotor and main rotor. The drive
end is supported by the engine flywheel.
Single- bearing alternators
cannot use flexible coupling, and they are also smaller in size. They
can, however, be used in applications where there is low vibration or
higher-quality foundations.
Some manufacturers will specify the use of a single-bearing alternator, based on a torsional vibration analysis. They can be used for a variety of typical generator applications, including backup.
Double-Bearing Alternators
Double-bearing alternators, because of their size, have two bearings, one at either end of the shaft. Since single-bearing alternators have been introduced (and because they are easier and faster to assemble), double-bearing alternators are typically used for machines that specify the need for them.
Double-bearing alternators can be helpful for applications where there is higher vibration or lower-quality foundations. Some manufacturers will specify the use of a double bearing alternator, based on a torsional vibration analysis.
These alternators can also be used in mobile and marine applications.
Marine and Mining Alternators
Marine alternators have higher power demands to run AC/DC inverters, lights, navigating equipment, radio transceivers, water makers, pumps, winches, and other high-amperage devices.
Additionally, marine engines are often installed in enclosed
compartments to shelter them from moisture and salt spray. This means
that marine alternators must be self-cooling at high loads or have an
additional cooling subsystem.
Mining alternators require reliability
for efficient and powerful, continuous use. Mining alternators require
portability and superior air filtration whether deep underground or at
surface level.
If your alternator is not well maintained in these difficult environments, its lifespan will be shortened. However, with our expertise, you can select an alternator can produce at a high level for the duration of your projects.
Other Considerations for Types of Alternator Applications
In any application, there are certain features you’ll want to consider when choosing an AC alternator. Among these are:
- Phases: Single-phase alternators produce a single, continuously alternating voltage. Single-phase alternators are found in many applications, most often when the loads being driven are relatively light. The three-phase alternator is by far the most common of all alternators in use today, both in military and civilian applications.
- Frequency:strong> The output frequency of alternator voltage depends upon the speed of rotation of the rotor and the number of poles. The faster the speed, the higher the frequency. The lower the speed, the lower the frequency.
You want to keep everyone who is always working with the alternator machinery safe. That starts with choosing the right alternator based on your application needs.