How Does An Electric Generator Work

An electricity generator is one of the most popular appliances that you have in homes and businesses. It is a very useful appliance that aids in the production of electricity and allows us to continue our daily routines and business operations during power outages.

Generators are available in a variety of sizes and shapes. When I’m talk about the size of a generator, we’re not talking about the actual dimensions of the machine; rather, we’re talking about the generator’s power generating capability.

A generator is a popular unit, and it is beneficial to understand and comprehend the fundamentals of its operation. The basic working mechanism behind the creation of electricity, as well as the parts involved in the process, will be discussed in this article. We’ll also go through several pointers about how to make sure your generator lasts as long as possible.

How Does An Electric Generator Work:

Main Working Parts of a generator:

To fully comprehend the operation of the generator, I must first comprehend the operation of each component and the role each played in providing you with electrical energy.


The generator’s key and most critical component is the engine. It is the section of the generator that receives mechanical energy.

The output of the generator is directly proportional to the size of the engine. Consider the example of a car engine and its horsepower to better understand the relationship between generator and engine.

Different types of fuels, such as diesel, propane, and gasoline, are used in engines. OHV and non-OHV engines are the two most common types of engines. Because of the differences in composition, OHV engines are preferred over non-OHV engines.


The alternator is one of the most critical parts of the generator because it converts the mechanical energy supplied by the engine into electrical energy. The alternator is housed in a steel housing, and its components work together to cause the relative motions that are caused by electric and magnetic fields.

Fuel System:

The fuel tank is the section of the generator that stores the fuel. The size of the fuel tank is determined by the generator’s size. The fuel tank will have a fuel backup of 6-8 hours for larger generators and 2-3 hours for smaller generators, depending on the size of the generator.

A tiny generator’s fuel tank can be found on the top or bottom of the generator. Fuel tanks for commercial and large generators are often built separately from the generator unit.

The following are typical components of a fuel tank: Pipe Connection The pipe links the generator’s fuel tank and turbine.

A ventilator is installed in a fuel tank to ensure that there is no pressure build-up inside the tank. Overflow Pipe An overflow pipe prevents the fuel tank from being overfilled during the filling process.

The fuel pump is an electrically powered device that transports fuel from storage to the used container.Small generators do not contain it.

Filter – The filter prevents dust and water from accessing the engine and other critical components.

Injector – The injector’s job is to inject a substance into the body.

Voltage switch:

It controls the voltage at the output. It’s the section of the generator that converts the AC current to DC current or vice versa.The output voltage flickers a little when you place a load on the generator. The flickering indicates that the generator has taken over the load.

Battery Charger:

Batteries are used to start modern generators. All of the generators come with a regular battery charger that charges the batteries automatically as soon as the generator is switched on.

Control panel:

This function makes it easier for users to communicate with the generator. It has controls such as a frequency switch, phase selector, and engine controls, as well as displays the output voltage and gauge levels. It also controls the electric shut down and starting. In older versions, control panels are normally missing.


The frame encloses all of the above-mentioned generator components. It is made of high-quality steel, and the reliability of all the generator’s parts is also dependent on the frame’s durability and sturdiness.

Lubricating system:

A lubrication system is also included in the engine, which keeps the moving parts lubricated and friction-free. Your generator may stop working and its output may be reduced if the moving parts are not properly lubricated.

The oil contained in an oil pump lubricates the generator’s engine. It is important to change the oil and check the oil level to ensure proper operation.

Most medium-sized generators need an oil change after 500 hours of operation.The generator manual, on the other hand, specifies the best time to adjust the gasoline.


After reading our article on the operating principles of an electric generator, I’m confident that you have a better understanding of how your generator works. I’m certain that your generator mechanic can no longer take advantage of you because you will have ample experience. If something goes wrong with your generator; I suggest that you call a professional instead of trying to fix it yourself.

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