where is pin 1?...

[legg]

On Wed, 30 Aug 2023 17:41:54 -0700, John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote:

<snip>

I\'m not using this on a conventional AC power line. My box is a power
source, a 3-phase permanent-magnet alternator simulator, and it drives
a FADEC shorting/shunt regulator. Simulation shows a 6-amp RMS ground
loop, and the 3-leg CM choke reduces that to 100 mA.

The choke is a horrible beast to put on a PC board.

The alternator, regulator and loads will be a hell of a lot more
difficult to simulate accurately than the interconnecting
filter circuitry.

RL

 

[John Larkin]

On Thu, 31 Aug 2023 09:20:14 -0400, legg <legg@nospam.magma.ca> wrote:

On Wed, 30 Aug 2023 17:41:54 -0700, John Larkin
jlarkin@highlandSNIPMEtechnology.com> wrote:

snip

I\'m not using this on a conventional AC power line. My box is a power
source, a 3-phase permanent-magnet alternator simulator, and it drives
a FADEC shorting/shunt regulator. Simulation shows a 6-amp RMS ground
loop, and the 3-leg CM choke reduces that to 100 mA.

The choke is a horrible beast to put on a PC board.

The alternator, regulator and loads will be a hell of a lot more
difficult to simulate accurately than the interconnecting
filter circuitry.

RL

I have a gigantic Spice model. A 25 millisecond sim takes about a half
hour to run.

This is the equivalent FADEC regulator that I drive, a small part of
my overall simulation. It\'s a terrible load. Motorcycles often have a
similar reg, and some cars have permanent-magnet alternators and do
this too.

https://www.dropbox.com/scl/fi/lk0p4dj4a9dtlw1b2kh6r/Fadec_Box.jpg?rlkey=1hsxoak5xc32ul3ymdb06oh12&raw=1

We spun up some jet-engine-type alternators to see how they behave.
They are poorly specified; even the basics are considered to be
top-secret by the makers.

https://www.dropbox.com/scl/fi/yf1vl8jyrg76wu6cvzepo/DSC04245.JPG?rlkey=8awdpqdxg1eu1adlga911df61&raw=1

https://www.dropbox.com/scl/fi/p06hci6l9ir0upjuukqib/PB180166.JPG?rlkey=5r3wyk5yy01jr89hoeicx5b1j&raw=1