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Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Good day all,
I've been thinking of trying some ideas on mix-matching some SStc ideas together like this one where it takes Wards E-class coil and combines it with skoris dual primary design , however when simulating this TP T1 acts just like Steve said his simulation did where it was JUSt under damped so that arcs drawn fro mthe topload would make the circuit become critically damped, however when I add the second fet the damped effect on T1 stays the same but T2 has a resonant effect where it rings up to about 30v then rings back down to 0, and repeats, is there something I'm missing that would allow me to have this idea work? Also I realize steves circuit calls for IRFP460's but all I have ATM is some HRFZ4N's so could this work with the HRfz's even thought they are rated for 55v since I'm only putting 24vin and getting a D-s charge of ~80v?
Registered Member #1232
Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
You can't do push-pull Class E like that because each half trashes the "magic" Class-E voltage profile of the other half. Have a look at the Class DE paper by Iain de Vries for a system that works with more than one switch.
Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Thanks Richie that solves the problem , but kinda brings a new problem into the equation with Steves original D-s Scoping He set it to be just ever so slightly under damped resulting in a 20v charge when the fet kicks in, with this set up I can get it to be criticaly damped or either of the extremes and its almost 2x as sensitive to adjustments. Also If iget this to actually work wouldn't that mean that it'd be the 1st Class E/F SSTC?
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
GeordieBoy wrote ...
You can't do push-pull Class E like that because each half trashes the "magic" Class-E voltage profile of the other half. Have a look at the Class DE paper by Iain de Vries for a system that works with more than one switch.
...or some of the Caltech papers like...
-Richie,
How you mean this richie? I thought it would not matter if I used a single or separate capacitors for interleaved class-E amps, as long as they are identical?
This is confusing me, are the amplifiers heterodyning with each other (at difference freq. caused by tolerance of the capacitors?) in first schematic?
BTW, when you parallel class E amps you would use separate tank circuits (matching networks as you call them) for each amplifier, also implying separate caps, or no?
I remember asking you whether paralleled amplifiers would interfere, you said they wouldn't?
What ken drew in second schematic is an equivalent to royer oscillator except it's not feedback driven.
Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
The u1 acts like as the feedback, its set for 335k with a 50% duty cycle I just used it to make the schematic look cleaner and also Its kinda hard to get an antenna or CT feedback design to work the same way as a TC or at least I think.
Shaun about the tabs and you life, to bad it doesn't show all the sites I have up when I took the SS, Cuz Its actually like 10 sites, ups, Wards Site, skori's site, forums, and satalite radio, and I think one or two other sites that were irrelavant.
I guess I should ask this before I get too caught up in this idea and then make a dissapointing discovery, But might there be any difference in arc length with the various topologys?
Like would I get longer arcs from Class E like wards, Class E/F, Half bridge DC, Full bridge DC, half or full bridge half wave rectified?
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SSTC Merger Idea
