Big Coil (DRSSTC v2)

Big Coil has been an ongoing long term project, with a bit of recent research into the optimal ways to get phase lead compensated feedback working within a half cycle at the start of each pulse. It is trivial to get a phase leading signal a cycle or two from start, but it has proven relatively difficult to get it immediately.

The project has also gone through a number of gate drive revisions. I’m currently using optically signaled drivers on each brick with a 60hz iron isolation transformer powering the board. It pulls the gate +20V/-5V, capable of about 30nS switch time with minimal gate resistance, although I put an ohm or two in to help limit any ringing that could occur both on the gate, and more importantly voltage spikes that could form from emitter to collector.


Machining bus-plates


Bridge assembly


Resonant tank capacitor (CDE942 array)


Logic controller


Realtime tuning inductor with stepper motor


Primary current waveform with secondary in place at tuned resonance.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Follow

Get every new post delivered to your Inbox.

%d bloggers like this: