I am doing project on electrical vehicles. I need 400v from 120 v of batteries. I am testing my bidirectional converter in boost. I suddenly disconnect the load when the output volthage 350v. So the output voltage increase as witout load of boost converter. But it should to operate in buck mode when the voltage is 420v. When i disconnected the load at 350V suddenly. The boost converter configuration swithces burnt out. The voltage increases so rapidly that controller didnt take any decision to operate in buck mode. Can you tell me this is happened. Controller shoud take deciaion to operate it in buck. Should i not to remove the load suddenly on boost mode.
I need to operate the boost even the vehivles is stop. But its voltage will contanlty increase. What i have to do. Whar should i have to do for the unloaded condition in my vehicles.