Hi my all friends,
In the circuit bellow I have two similar resistor (Wirewound resistors) one for charging and other in discharge path. when the switch U1 is ON (at the time of 0.5s) the capacitor starts charging through R1. In this time a huge instantaneous power is dissipated in R1 and after about 1sec when the capacitor is fully charged the dissipation power exponentially goes to zero.
Now my capacitor is charged to 380VDC.
At the time of 4sec U1 turns OFF and U3 switches ON. At this time the capacitor discharges to R2. I expect that two resistor (R1 and R2) dissipate the same power but why R1 can withstand and R2 fails?
In the circuit bellow I have two similar resistor (Wirewound resistors) one for charging and other in discharge path. when the switch U1 is ON (at the time of 0.5s) the capacitor starts charging through R1. In this time a huge instantaneous power is dissipated in R1 and after about 1sec when the capacitor is fully charged the dissipation power exponentially goes to zero.
Now my capacitor is charged to 380VDC.
At the time of 4sec U1 turns OFF and U3 switches ON. At this time the capacitor discharges to R2. I expect that two resistor (R1 and R2) dissipate the same power but why R1 can withstand and R2 fails?