top of page

What is a generator and how does a generator work?

A generator is a mechanical device that converts other energy sources into electrical energy to generate current and voltage. For example, water turbines, steam turbines, diesel engines, etc., they can convert water flow, airflow, fuel combustion, or nuclear fission into mechanical energy and transfer it to a generator, which is then converted into electrical energy.

Generators are very valuable mechanical equipment, mainly used in industrial and agricultural production, national defense, science and technology, and daily life, to provide electricity during the current interruption. There are many types of generators, but its working principle is to generate electricity through the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is to use appropriate magnetic and conductive materials to form a magnetic circuit, and at the same time they will conduct electromagnetic induction, which will generate electromagnetic power, and the circuit can achieve the purpose of energy conversion.


Types of generators

There are two main types of generators, namely Alternating Current Generators (AC generators) and Direct Current Generators (DC generators). These two types of generators are the same, and their difference lies in the different application methods, that is, the different ways the load obtains electrical energy.

1. Alternating Current Generator

The alternator is mainly composed of wire coils that rotate in a magnetic field. When the current moves upward through the magnetic field on one side of the coil, it will induce a potential difference in the same direction. Currents from the south and north poles of the magnet usually flow in opposite directions and generate alternating current. Alternators are often used in small electrical appliances at businesses or homes.

2. Direct Current Generator

The function of a DC generator is a mechanical device that converts mechanical energy into DC electrical energy. It can be mainly used as the excitation of electrolysis, electroplating, DC motor, electric smelting, and AC generator. The electric potential waveform of the DC generator is better, and the electromagnetic interference is small. A DC generator uses a motor to drive the armature so that it can rotate in a counterclockwise direction at a constant speed. The main working principle of the DC generator is that when the motor rotates, the action of the external mechanical force drives the conductor coil to continuously rotate in the magnetic field, which will continuously cut off the induction line so that the induced electromotive force can be generated. According to Faraday's law, when the magnetic flux of a conductor is greatly reduced, an electromotive force is generated. The induced electromotive force in this coil is an alternating electromotive force. By using a commutator to match the commutation action of the brushes, the current is DC electromotive force.

Working Principle

1. Diesel Generator

The diesel generator is a small mechanical equipment that uses diesel as fuel to drive generators to generate electricity. Diesel generators are mainly composed of generators and diesel engines. The diesel engine drives the generator to run to convert the energy of the diesel into electrical energy. The structure of a diesel engine is composed of cylinders, cylinder heads, pistons, piston pins, intake valves, exhaust valves, connecting rods, crankshafts, and bearings.

Its working principle is that in the diesel cylinder, the air will be filtered by the air filter to become purified air, and then it will be mixed with the high-pressure atomized diesel sprayed from the fuel injector. After mixing, under the squeeze of the piston, its temperature rises and reaches the ignition point of diesel. As a result, the ignited diesel will mix with the gas to produce violent combustion, causing its volume to expand rapidly, pushing the piston down. Each cylinder performs the above procedures in sequence, so the driving force acting on the piston will become the force that pushes the crankshaft to rotate through the connecting rod, thereby driving the rotation of the crankshaft. It is possible to use the rotation of the diesel generator to drive the rotor of the generator. Using the principle of electromagnetic induction, the generator will output induced electromotive force through a closed load circuit which can produce an electric current. This type of diesel generator is suitable for daily power generation in various large and small businesses and homes.

2. Gasoline Generator

Gasoline generators mainly use gasoline as fuel to convert chemical fuels such as gasoline into electrical energy. Its transformation process is the process of the working cycle. To generate kinetic energy, it burns the fuel in the cylinder to drive the piston in the engine cylinder to move repeatedly, thereby driving the crank of the connecting rod and the connecting rod of the piston. They will revolve around the center of the crankshaft in a repeated circular motion and output power. The gasoline generator is mainly composed of the stator, bearing, rotor, end cover, and other components. This type of gasoline generator is mainly used in daily life, national defense, industrial and agricultural production, etc.

The working principle of a gasoline generator has four-piston strokes, which are intake stroke, compression stroke, expansion stroke, and exhaust stroke. Piston stroke refers to the process of the distance between the upper point and the lower point of the piston.

Generators play a backup role in our daily life and industrial engineering operations. Allows us to work as usual where there is no power supply. Different generators can be used for different tasks, so buying a generator is also a knowledge. To find a suitable generator, please contact our customer service at 011-7000 7687 or

bottom of page