The DC-DC buck circuit of the electric vehicle converts the high voltage direct current of the battery pack into low voltage direct current for the auxiliary circuit and electronic equipment in the car.
The buck circuit generally adopts a DC-DC converter composed of an inductor and a switching tube, which controls the on-off and cutoff of the switching tube through periodic switching, and controls the process of energy storage and release of the inductor to realize the buck process.
At the same time, in order to improve the efficiency of the circuit and reduce the electromagnetic interference and power consumption, some technical means are usually used, such as capacitor filtering, independent power supply and so on.