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Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
Just a newbie question about drsstc interrupter, can someone explain what is BPS, PRF, PW, and Pulse rate? all of these terms are very confusing for me.
If possible also distinguish these terms to oscillating feedback freq and the interrupter pulses,. I mean what terms are for f.b. freq and int.?
is PRF is same as BPS? cause in frequency, seconds(time) are concerned, and this seconds are in the B.P.S as in second isn't?!grr please, help answer these,. it so confusing they all circling in my head..
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
Shhhh don't cross-post either... I'm not sure what the "official" terms are, but an interrupter simply outputs square pulses that turn in entire coil on and off. For a DRSSTC, the important parameters are pulse width and BPS. Pulse width determines how high the primary current rings to, and BPS determines the power throughput of the coil.
Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
Im sorry sir but I didnt actually get it ,. sorry can you elaborate it more? and what is the acronym B.P.S. means?? is it beat per second? or bang per second??? and what does this means?
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Breaks or beats per second, pulse repetition frequency, and pulse width respectively.
The feed back frequency is usually just called resonant frequency or operating frequency, or at least that is how i usually see it used. PRF is used for interrupt rate.
BPS seems to be mostly reserved for SGTCs, and it refers to how many times the spark gap fires in a second. Some of these words are interchangeable, so i can see how one may be confused.
Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
ah I see,. but how to compute these,. specially the duty cycle or the "bang" time or "ON" time per interrupter cycles,. for example, i do have a coil which has Fres of 350khz,. what particular computation can I use to determine the right value in micro seconds? and how to implement this into circuits? Also, what will be a good frequency? thank you for your responses ,. but i hope you guys can clear these questions i have for me sorry for being a noob X-(
Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Location:
Posts: 635
Duty cycle depends on how quickly your tank circuit rings up. A high Fres will require a short on time. It depends on how many cycles your system can handle. Your limiting factor is usually device current handling, or in my case, tank capacitor voltage...
Your current builds with every half cycle. 350khz means you have 2.86 us per full cycle, 1.43 us per half cycle.
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
No. A simulation will tell you how quickly your primary current rings up...say you're using CM600's and you're trying to be gentle, so you set a current limit of 2000A. Then you see how many cycles it takes to go over its, and compute ON time accordingly.
Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
what particular simulator can I use? Is it a software that can be downloaded? lets say I have a 400Apk type of IGBT (irg4pc50ud), what "On" time that is safe to use? please point me the simulator that you're using. thank you
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DRSSTC interrupter concepts
can you elaborate it more? and what is the acronym B.P.S. means?? 
is it beat per second? or bang per second??? and what does this means?
