Electrical energy is one of the most important energy sources in modern society. An alternator is a mechanical device that converts other forms of energy into electrical energy. It is driven by a turbine, steam turbine, diesel engine or other power machinery to convert the energy generated by water flow, gas flow, fuel combustion or nuclear fission into mechanical energy to the alternator. And then converted to electrical energy by an alternator. Alternator has a wide range of uses in industrial and agricultural production, national defense, technology and daily life.
First of all, the concept of an alternator: an alternator is a power plant that converts mechanical energy or other renewable energy into electrical energy.
Generally, our common alternator sets are usually driven by steam turbines, hydro turbines or internal combustion engines (alcohol engines such as gasoline engines and diesel engines), wind energy, solar energy, biomass energy, and ocean energy. At present, the market of diesel alternators is the largest, mainly due to the large capacity of diesel alternators, which can be operated in parallel and with long power supply. It can also operate independently and does not run in parallel with regional power grids, and is not affected by grid faults. , high reliability. Especially in the case that the common commercial power in some areas is not very reliable, the diesel alternator is used as the backup power source, which can not only play the role of emergency power supply, but also optimize the low-voltage system to make some of the more important loads. Used when power is off. Therefore, it is widely used in engineering.
There are many forms of alternators, but their working principles are based on the laws of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is to construct magnetic circuits and circuits that mutually electromagnetically sense with appropriate magnetically conductive and conductive materials to generate electromagnetic power for energy conversion purposes.
The classification of alternators can be summarized as follows:
Alternator DC alternator, AC alternator Synchronous alternator, asynchronous alternator (rarely used)
AC alternators can also be divided into single-phase alternators and three-phase alternators.