How Diesel Generator Works

[Yangzhou Shengfeng Power Plant] The working principle of the diesel generator is to use the principle of electromagnetic induction. The rotation of the crankshaft of the diesel engine will drive the generator to rotate and generate electricity. The generator has a DC generator and an alternator. The DC generator is mainly composed of a generator shell, a pole core, a magnetic field coil, an armature and a carbon brush. The alternator is mainly composed of a magnetic material made up of a plurality of north and south poles alternately arranged permanent magnets (called a rotor) and an armature coil (called a stator) made of silicon cast iron and wound with a plurality of sets of series coils. DC generators and alternators differ in the principle of operation, but eventually reached the goal of power generation.
Diesel generator set is a kind of small-scale power generation equipment, which refers to the power machinery that uses diesel fuel as fuel and uses the diesel engine as the prime mover to drive the generator to generate electricity. The whole set of units is generally composed of diesel engines, generators, control boxes, fuel tanks, storage batteries for start-up and control, protective devices, and emergency cabinets. The whole can be fixed on the basis of positioning and can also be mounted on a trailer for mobile use.
Diesel generators are non-continuous power generation equipment. If they are continuously operated for more than 12 hours, their output power will be less than about 90% of the rated power. If users need to use it for a long time, they need to configure common generator sets. That is, the generator set should take into account the fact that the power of the working set has dropped for a long time.
The relationship between the common power and standby power is: For example, the user needs a 100KW diesel generator set, and the standby power of a commonly used 100KW diesel generator set is 100KW*110%=110KW. That is, the standby power of the 100KW diesel generator set is 90KW. Although the diesel generator set has low power, it is widely used in mines, railways, field construction sites, road traffic maintenance, factories, enterprises, hospitals and other departments due to its small size, flexibility, light weight, and complete facilities for ease of operation and maintenance. , as backup power or temporary power. A diesel generator is a type of AC power supply equipment for a self-contained power station. It is a small, independent power generation device that uses an internal combustion engine as a power source to drive a synchronous alternator to generate electricity.
By installing the brushless synchronous alternator coaxially with the crankshaft of the diesel engine, the rotation of the diesel engine can be used to drive the rotor of the generator. Using the principle of 'electromagnetic induction', the generator will output the induced electromotive force, and the closed load circuit can generate current. . The diesel generator set is a combination of an internal combustion engine and a synchronous generator. The rated power of the internal combustion engine is limited by the mechanical load and thermal load of the components. It is called the rated power. The rated power of the AC synchronous generator is the rated speed. In long-term continuous operation, the rated output power is usually referred to as the matching ratio between the rated output power of the diesel engine and the rated output power of the synchronous alternator.

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