Hi there,

I am having a problem with understanding the boost convertor theory. Simply my question is whether the inductor is acting as a source at off condition.

According to image attachment the boost convertor said to have a negative voltage of Vs - Vo. I am meshed up with that part please help me.

Thank you in advance

 

Yes, the inductor stores energy from the supply when the switch is on, and it returns energy to the load when the switch is off.

The coil voltage will have value Vs-Vo when the switch is off, and as Vo>Vs for a boost converter, the voltage will be in the reverse direction to when the switch is on, as shown in the diagram.

 

First of all thak you for the reply.

I had done somereading regarding this ,but there what mentioned is that the VL @ off condition is -(Vs - Vo) .

I think the earlier plot shows only the value. that is why it is mentioned as Vs - Vo

The book I refered is: Power Electronic Systems: Theory And Design By Agrawal

Thank you in advance