Can high frequency switching power supplies be connected in series? Is there a risk in concatenation?
In some types of high frequency switching power supply designs, components and assemblies are carefully arranged in series and parallel configurations. It is impossible to connect the relays in parallel to provide a large current. The use of two capacitors or two switching transistors (IGBT, triode, MOSFET, etc.) in series is not used for the series structure to solve the problem of insufficient withstand voltage.
The reason for this is that if you want the switches to be on in sync, in real life the two switches can't be perfectly in sync. These tiny differences imply the potential for one to be turned on and the other to be turned on. At this point, all the dielectric strength is applied to the tube, which can easily damage the components of the high frequency switch mode power supply. This is actually a production model prone to problems. reliability model. This is not our functional design. Learn about two parallel models obtained by dividing tension.
Two relays are connected in parallel to provide higher current. It is also difficult to keep the relay contacts in sync. So, at the beginning, the relay just turned on and the other didn't. Relay contacts can be glued together.
Due to the large capacitance error of capacitors, the voltage divider is relatively high when connected in series. Therefore, it is better to connect a resistor on both ends of the capacitor, the size of each resistor value corresponds to the capacitance value of the capacitor, and the resistor value should not be too small to avoid high quiescent current due to high electrostatic power consumption.
