dc chopper

hi,
i had a 400v 3 amp dc power supply,i want to make it as a pulsed dc(PDC) with variable frequency and duty cycle...i am planning to use a IGBT for this;
can any one suggest me a circuit for this..please help


thank u

 

Welcome to AAC.

Quite a challenge for ur first post.
U will get better response if you would tell us what u know and ur field experience in power electronics.
And you should fill in all the details in user cp settings.

By the way. U need atleast 100 posts to befriend me.