On 07/05/2011 02:59 PM, Spehro Pefhany wrote:
On Tue, 05 Jul 2011 16:55:30 -0500, Jon
wrote:

On 07/05/2011 01:45 PM, Spehro Pefhany wrote:
On Tue, 05 Jul 2011 10:52:22 -0700, Jim
wrote:

Spehro Pefhany wrote:

Will any commonly available 240V VFDs go up to 400Hz? Need around
7.5HP.

Powering up your surplus Minuteman missile?

Close. Testing a mass of sophisticated equipment that gets crammed
into a small cargo aircraft.


A VFD does NOT produce 240 V sine waves. It produces 400 V square waves
that are the equivalent to a MOTOR, ONLY! it will definitely fry
any electronics you connect to it!

I want to run an MG set off of it to get (a lot of) DC . ;-)

It is theoretically possible to filter the VFD output, but that would be
a significant job to build.

Jon

Then why not just get a big DC power supply?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html