خرید محصولات و مشاوره فنی رایگان


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    what is generator?

    what is generator?


    The device by which mechanical or chemical energy can be converted into electricity is called a generator of electricity, which is popularly called in Iran an electric motor.

    The propulsion system and mechanical power supply for generators are often motors, turbines, crankshafts and other sources. Generators may also use chemicals or other materials as engine fuel for combustion to produce electricity.

    Generators do not generate electricity themselves, but use an external source to drive electrons and generate electricity and electricity through an electrical circuit.

    Electric motors are used for different purposes and are available in different shapes and models. This article will discuss the types of electric motors, the price of electric motors as well as the electric motor that fits your job.

    The generator’s function

    Different models of electric motors can be found all over the world. Generators and electric motors, for example, are used in hospitals, office and commercial buildings, and stores to power the entire building at the time of power outages.

    It is essential to use a power generator in places such as hospitals that have critical devices that must always be connected to electricity.

    Power generators are also used in power plants to convert atomic, chemical, or mechanical energy to electricity, eventually distributing electricity throughout the city or country.

    Low-power motors can also be used for home appliances, lighting systems, refrigerators and freezers when we have power shortages.

    Note: Alternators in cars can also be considered a form of electric generator.

    Advantages of using generator

    Power generators have several important advantages. Generators, for example, can be used for short-term and long-term power generation, or for long-term, permanent use.

    The power generator is also available in a variety of shapes and sizes. Electric generators can be used to generate different capacities and make the electric motor adaptable to different devices.

    Another advantage of electric motors is their relatively long service life, which can be used for many years without the need for repair or replacement.

    Disadvantages of using generator

    Although the use of a power generator (electric motor) is beneficial and has many benefits, it also has its disadvantages. Diesel-powered high-power generators are more expensive, although they are valuable when needed.

    Other disadvantages of a power generator include the generator being heavy and heavy at high power.

    Generator classification

    In addition to power factor classifications, power motors are also divided into fuel consumption and use, which we will discuss in the following types of fuel motors.

    Petrol generator

    The most common generator is petrol one. In a petrol-powered engine, the power source of a petrol engine is lower than gas and diesel models. In contrast, the gas engine can be used for a longer period of time but requires more maintenance.

    In a petrol engine, gasoline damages the rubber components of the engine and speeds up the wear process.

    The disadvantages of this lifting model include the difficulty of storing petrol, which can be a potential hazard of fire and explosion.

    Also keep in mind that do not store gasoline for long periods of time to observe safety tips.

    The use of generators is common in home and small industrial environments and may be the best choice but never the best choice for larger industrial environments and projects.


    Safety Tip: A petrol engine produces carbon dioxide gas, which is a toxic and suffocating gas. Therefore, do not use this device indoors as it may cause choking and damage to the operator.

    Petrol generators are suitable for powering villas, gardens, poultry, refrigerators, air conditioners.


    Gas generator

    The fuel for this type of engine is electricity, propane or liquefied natural gas (LPG). The benefits of this type of electric motor are easy storage of gas on the ground or in the basement.

    Also, due to the clean fuel consumption, no problems such as contaminants enter the air. Gas powered engines are more durable but more expensive than gasoline.

    These types of electric motors are less powerful than gasoline and are less common in the Iranian market.

    Diesel generator

    Durable diesel engines have a longer service life and also require less maintenance. The diesel engine typically operates at 1800rpm and requires service every 12,000 to 30,000 hours. In this regard, the engine of a gas powered engine needs 6000 to 10,000 hours service.

    The heat generated by the combustion of diesel fuel is lower than gasoline and the so-called cooler engine, which reduces engine heat and wear of engine components.

    Diesel generators can generate power at a lower cost by increasing engine efficiency and fuel quality. While diesel fuel is a dirty fuel, but with advances in engine technology, emissions have been reduced.

    It is also possible to justify the use of diesel engines from an environmentally friendly mix of 20% biodiesel fuel. Diesel generators have higher power and longer life than gasoline and gasoline engines.

    Diesel fuel prices are also about three times lower than gasoline, but they are about 40 to 60 percent more expensive than gasoline.

    About the power of generators

    First, you need to know some of the units of measurement and their meaning used in the power motor formula.








    Kilovolt ampere




    Power factor




    Calculate the power required by the generator

    1- To calculate the power consumption of your device, you must first know the power calculation formula.

    P= V×I

    2- Now, finding out the power consumption of the device can be selected according to the following two models of power motor.

    For devices such as lamps, the power of the electric motor is equal to the lamp power consumption. For example, a 200 watt lamp needs 200 watts to turn on.
    For devices with rotary motors and driven by generators, such as water pumps and generators, the power of the motor is 1.5 to 2 times higher.

    The following table shows the number of electrical devices with the power of the device itself and the maximum power that the device needs to start.

    Name of the device

    Power (W)

    Power required for starter (optional power motor)

    Portable fan



    Display fridge



    46 inch TV






    Computer (desktop)



    Fridge and freezer






    Coffee maker



    Electric kettle



    Circular saw



    Milling stone (8 in)



    1 horse air compressor



    Water pump








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