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Silicon Controlled Rectifiers are not as good as Metal Oxide Semiconductor
Field Effect Transistors for our applications.
Light dimmers are alternating current only, and low power. First build with switches and solenoids, you will be able to maneuver anywhere. It's not like driving a car where you need an exact velocity. Question for all about holding a depth - I have dive planes and don't like
them, as I want to hover stationary.
How does a variable ballast tank compare with a vertical thruster? VBT is harder to control? Electric motor with speed control is best? Will 30 vertical pounds of Minn Kota thrust on the side roll a sub, or just push it up and down? In other words, are 2 vertical thrusters needed for balance? -Peter Korwin
On Wed, 08 Dec 2004 10:47:36 +1100 Dave Everett <deverett@idx.com.au> writes:
> At 10:18 AM 12/7/2004, you wrote: > > >Dave, > >SCRs are used throughout the sub industry for motor controllers on > DC 120V (mostly) propulsion systems. It ain't news. > > Strange they would use SCRs. I guess it's because motor control was > being used in subs before the FET. > > I found this in the electric car club too. Most people had chopper > circuits using SCRs, I couldn't understand why as the resistance and voltage > drop is greater than a FET. > > Dave Everett > |