It is the fast battery charging system to speed up the charging time. In this case, the designer must be an expert in the use of high technology in the control of a charging system so that the battery is not damaged.

The number of cycles completed in one second. are defined as Hertz (Hz) In Europe, Asia, Oceania, Africa and much of South America the frequency of alternating current for domestic use is 50Hz. Instead in North America it is 60Hz.

It is said of the sinusoidal figure that gives us the phase and that can be observed by means of an oscilloscope, it corresponds to a complete turn of the generator that provides it, the purer the sinusoid it can be said that we have better quality of electrical energy.