The current flowing through the inductance coil in the circuit board cannot change abruptly. If the current of the inductance coil is cut off suddenly, the inductance itself will generate a strong electromotive force to try to maintain the current constant, and this electromotive force is often very strong, and it will break down Attempts to block current switches, whether air switches or semiconductor switches
If it is an air switch, it will break down the air, causing the power cannot be cut off. If it is a semiconductor switch, it will burn the switch. The function of the diode is to prevent the back electromotive force generated when the DC relay is disconnected from affecting the circuit or damaging the components. element.
Therefore, the diode plays a very important role in it and is an indispensable component.
