[GreenKeys] Loop driver question

[Jeffrey D Angus]

On 4/23/2013 10:34 AM, Ken Schwieker wrote:
> I believe 100 volts is high enough voltage for a reasonably fast
> current rise time
Yes.

It is basic AC theory. To achieve a fast rise time with an inductor
you require a stiff current source. "Stiff" being defined as having
sufficient voltage to maintain the current despite the initial
impedance of the inductor.

Hence the nominal 120 vdc loop supplies rather than the 6-12
volts it take just to pull 60 mA through the coils.

Jeff-1.0
wa6fwi