When the main switch S turns on again, the auxiliary switch [S.
U] and the on-state resistance of the auxiliary switch [S.
A little bit more efficient way to control the recuperation network is to turn off the auxiliary switch [S.
The auxiliary switch has to be turned off when the voltage across the snubber capacitor is half of the output voltage.
11 shows the control signal of the main switch, the control signal of the auxiliary switch, the voltage across the snubber capacitor [C.
With the help of a resonant circuit, two diodes and an auxiliary switch the energy stored in the snubber capacity is transferred to the output.