Reverse current without reversing voltage?

[roTTer]

I was studying First and Fourth quadrant choppers and that got me thinking.

Can the chopper run in the first and second quadrants meaning always Positive voltage across the load and Positive and negative load current.

My reasoning makes me think that it is not possible.

Any help?

 

[Xarren]

You can't reverse current as such, but you can make it pi radians out of phase with the voltage.

It is caused by the imaginary part of impendance, in reactive circuits.

No clue what the context is - But chances are this is your answer.

 

[roTTer]

I am aware of the phase shift using reactances.

Choppers are part of the Power electronics subject that we have in our courses.

The question that I have is there a chopper designed that can perform in the I and II quadrant?

I'll post the image of the I and IV quadrant chopper to clear things out more.

 

[Xarren]

Ahh, my appologies in that case, power electronics is black magic to me, but if you post a diagram I'll definitelly try to work it out.