Why do commercial businesses prefer brushless diesel generators over brushed generators?

Diesel generators are an essential part of business operations as they provide reliable and stable power during power outages caused by any reason. Therefore, it is important to choose a diesel generator that can meet your power needs and provide proper support to your business operations. In order to make the right decision and choose the right diesel generator, it is important to understand the difference between brushed and brushless diesel generators.

Diesel generators have an alternator that converts mechanical energy into electrical energy. It does this by using a rotor rotating magnetic field to produce energy.

For brushed diesel generators, carbon brushes are used to conduct electricity. On the other hand, brushless alternators use two sets of rotors that rotate together to produce and transmit current. This type of diesel generator has an exciter alternator where the exciter armature is the rotating armature while the exciter field winding acts as a fixed armature. Here, the exciter field creates a magnetic field with the help of an automatic voltage rule or residual magnetic field. When it starts rotating, a voltage is generated in the exciter armature, which in turn supplies current to the main field, thereby creating a magnetic field in the main armature.

Brushless diesel generators are considered to be more efficient compared to brushed diesel generators as they operate in a self-controlled mode. Apart from this, there are several other benefits of brushless diesel generators that make it a better choice than brushed diesel generators.

Brushless diesel generators are also known as permanent magnet generators. In a permanent magnet synchronous generator, the excitation field is provided by permanent magnets instead of fixed coil wires!

Reasons why brushless diesel generators are preferred

Brushless diesel generators prove to be ideal primary generators, especially for long-term use and where high power is required. Since brushless AC generators have no brushes and fewer moving parts, they require less maintenance and repairs. This not only makes them hassle-free but also more economical. Some of the main advantages of using brushless diesel generators are:

Lower noise levels

Brushless diesel generators are less noisy compared to brushed diesel generators, and therefore run more smoothly.

Since there are no brushes, there is little friction inside the machine during the operation of the generator.

Reduces the incidence of failures.

No brushes also means less chances of overheating and failures.

With fewer moving parts, there is less wear and tear, and very little maintenance and expense after purchase.

Longer Shelf Life

Brushless diesel generators may be slightly more expensive than brushed diesel generators, but they have a much longer shelf life. Coupled with less maintenance and fewer operational hassles, your generator will cause you very little trouble in the long run.

Convenient Design

Brushless diesel generators are designed to be more compact and lighter than brushed diesel generators, making them more portable and easier to move.

Reasons why brushed diesel generators are unpopular

Brushed diesel generators have a range of disadvantages that make them a second choice for businesses in many industries

Extensive Maintenance

Brushed diesel generators require a lot of maintenance and cleaning in a timely manner. This happens even when the generator is in use. The brushes need to be cleaned frequently to keep them running smoothly. Even then, they don't provide the same output as brushless generators.

Overheating Issues

The contact resistance between the brushes and the commutator is very high. This leads to greater friction and a high probability of overheating. Magnets help brushed diesel generators operate, and high temperatures caused by overheating can damage the magnets, resulting in expensive repairs.

Low efficiency

A large amount of mechanical energy generated by brushes is converted into heat due to friction, which reduces the efficiency of brushed generators. A lot of energy is wasted in this process.

Diesel generators are important machines, and they are used in a wide range of industries as well as for personal purposes. From real estate, construction, hospitals, schools, emergency services, industrial and manufacturing institutions, to factories, cold storage, mining, civil air defense projects, etc., diesel generators can be found everywhere. Whether you choose a brushed diesel generator or a brushless diesel generator mainly depends on its purpose.

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