[GreenKeys] LTSpice

[Jeffrey D Angus]

On 7/19/2013 3:03 PM, Jeffrey D Angus wrote:
> You can see the difference in the amount of overshoot and ringing.
>
> Jeff-1.0
> wa6fwi
The 0.1 uF and 470 ohm snubber.
The over shoot goes up to 245 volts peak and rings.
The 0.47 uF and 470 ohm snubber.
Over shoots to only 140 volts peak and rings once.

This is, of course, with 2 H for the coil inductance. Dropping
the inductance down to a lot less solves the over shoot and
ringing problems in itself.

Like I said, based on the paper by Rudy Severns, you can
calculate all this stuff in advance, but running LTSpice sure
makes a lot less painful to see what it's going to do by just
arbitrarily changing values.

Jeff-1.0
wa6fwi