Definition of Power Diodes, Introduction to Waveforms of Dynamic Processes in Power Diodes 3

Deadline process:

When the input voltage enters the negative half cycle, the diode begins to turn off. The current drops rapidly, but due to the presence of parasitic capacitance and inductance in the circuit, the actual current drop curve will have a certain lag and will not immediately drop to zero. The cutoff speed of a diode is affected by the reverse recovery time, which is the time required for the diode to recover from a conducting state to a cutoff state.diode

Deadline maintenance:

In the cut-off state, the diode is subjected to reverse voltage, which can be very high, requiring the diode to have sufficient reverse withstand voltage capability. In an ideal state, the current should be zero; However, in reality, there may be a weak reverse leakage current in the initial stage.diode

The dynamic characteristics of power diodes are crucial for their performance in power systems. For example, the design of devices such as inverters, rectifiers, and frequency converters must consider the characteristics of diode switching speed, forward and reverse voltage drop, and withstand voltage. When designing these devices, engineers need to choose appropriate power diodes based on the specific requirements of the application to ensure efficient and reliable operation of the system.diode