Since I am not going to run the 3 rotor TC in a vehicle
    I was thinking of using a cheap 110 volt to 220 volt AC transformer
    and use a voltage doubler circuit to jack it up
    440 volts DC.

    What do you guys think?

    Will save a whole bunch of money.

    Paul Lamar


    The voltage doubler will work fine, as far as the capacitor C1 and C2
    are large enough.

    As the low voltage equipment insulation grade is 1000 Volts, there is no
    problem to use two identical cheap 110 Volts to 220 Volts transformers
    to make a 110 to 440 volts transformer :
    The primaries are connected in parallel to the mains, and the
    secondaries are connected together in series as shown.

    Philippe DEJEAN
    Ingénieur Sénior transformateur

    Thanks Philippe. Great idea. You are just the guy I am looking for.


    Got any inductance recommendations on the choke inductance for 8000 RPM?
    Fires once per RPM. This simple CD system shorts the main power supply
    when it fires. I would like to avoid that.

    Paul Lamar

    Here is the first step. This is a very powerful high voltage power supply.
    We are talking electric chair. Be EXTREMELY!!!! careful if you try to
    duplicate this system.
    One mistake and you are DEAD!!!!!.DEAD!!!!!DEAD!!!!!

    The NSA will have a field day with this message :)

    Paul Lamar


    The stock 2nd gen CAS is used on the stock turbo 3 rotor engine.

    I got the 2nd gen CAS set up on the bench with a DC motor driving it.
    That way I can test a range of RPMs. This is a 10 ms period which is about
    5 to 6000  e-shaft RPM. This is the upper CAS sensor. The second gen has two sensors.
    Upper and lower.

    Now I have to figure how to fire all three rotor Capacitor Discharge Ignition systems  at the
    proper e-shaft angle with  this info and the lower CAS signal.
    The lower CAS puts out 12 pulses for every one on the top CAS.

    I am going to try counting lower pulses.


    Paul Lamar

Paul,

I ran my 3-rotor on a test stand using a modified 20b CAS.  I positioned three pickups 120* apart and each pickup fed the respective coil through a late 70's era GM ignition module.  This worked since the CAS turns 1/2 the eccentric rpm, each set of plugs fired at the proper time.  Possibly, you can do something similar?

Mark


No need to do that. I think all I need is a $1 CMOS binary counter chip. Count lower pulses to four and fire
rotor 2. Count to 8 and fire rotor 3. Rotor one can fire on the top CAS and reset the binary counter.

BTW the lower CAS makes a pretty good alternator. I'll wire it up as one and measure
the voltage and current it will generate. Here are both top and bottom CAS wave forms.

Both are over 12 volts peak to peak even at 25 ms.


Paul Lamar

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