Would someone mind yelling down to the little people and explaining what exactly FET's, SCR's, IGBT's ARE? And perhaps a nod in the direction of where one can pick up the basics of what is being talked about? My LT told me I had to help with the MRE's because the cook was AWOL, and if I don't figure this out I'll be SOL and my sub will be DOA.
Thanks,
Nuge
Subscuba@aol.com wrote:
At least, and a bridge is what I would go with. You would probably have to parallel several in each leg of the bridge to avoid dissipation problems.
There are a number of ICs on the market to do the drive functions. I think ONSEMI has one. You would have to do the power stages. Layout of the power stages are the bear.
I would suggest IXYS as a starting vendor for the FETs. I think their site is "WWW.IXYS.com" they are not the only vendor.
Ken Martindale
One other note on the price issue you brought up, though. A
reversible speed controller requires a FET H bridge, which means
twice the FETs. A forward only could be made for $5.00. A good
reversible would easily hit $10.00.