This resonant DC to AC converter is supposed to have a sine wave out..
See screen capture of LT sim + Vout + original patent schematic.
That's not good sine..
Patent on:
Maybe this patent is bogus. Maybe I botched the component values.. I'm stumped.. Why isn't this making clean sine? It's like Ton makes distortion.
LTSpice file
Version 4 SHEET 1 1156 680 WIRE 272 -112 -80 -112 WIRE 656 -112 352 -112 WIRE 272 0 272 -32 WIRE 272 0 160 0 WIRE 352 16 352 -32 WIRE 464 16 352 16 WIRE 576 16 576 0 WIRE 576 16 464 16 WIRE 160 32 160 0 WIRE 272 32 272 0 WIRE 352 32 352 16 WIRE 464 32 464 16 WIRE -80 48 -80 -112 WIRE 112 48 64 48 WIRE 352 48 352 32 WIRE 352 112 352 96 WIRE 464 112 352 112 WIRE 64 144 64 128 WIRE 112 144 112 96 WIRE 112 144 64 144 WIRE 272 160 272 96 WIRE 352 160 352 112 WIRE 464 160 464 112 WIRE -80 304 -80 128 WIRE 64 304 64 144 WIRE 160 304 160 112 WIRE 272 304 272 240 WIRE 304 304 304 -112 WIRE 320 304 320 -112 WIRE 352 304 352 240 WIRE 656 304 656 -112 WIRE 656 304 352 304 FLAG 64 304 0 FLAG 272 304 0 FLAG 160 304 0 FLAG -80 304 0 FLAG 576 0 ACout FLAG 464 160 0 SYMBOL ind2 256 -128 R0 WINDOW 0 -35 54 Left 0 WINDOW 3 -78 97 Left 0 SYMATTR InstName L1 SYMATTR Value 200µH SYMATTR Type ind SYMATTR SpiceLine Rser=0.1 Rpar=10k SYMBOL ind2 288 256 R180 WINDOW 0 36 80 Left 0 WINDOW 3 36 40 Left 0 SYMATTR InstName L2 SYMATTR Value 200µH SYMATTR Type ind SYMATTR SpiceLine Rser=0.1 Rpar=10k SYMBOL cap 256 32 R0 WINDOW 0 -20 8 Left 0 WINDOW 3 -38 61 Left 0 SYMATTR InstName C1 SYMATTR Value 1µF SYMATTR SpiceLine Rpar=100k SYMBOL voltage -80 32 R0 WINDOW 123 0 0 Left 0 WINDOW 39 -144 72 Left 0 WINDOW 3 -105 29 Left 0 SYMATTR SpiceLine Rser=0.1 SYMATTR InstName V1 SYMATTR Value 170V SYMBOL voltage 64 32 R0 WINDOW 3 237 345 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 -22 -2 Left 0 SYMATTR Value PULSE(0 10 0 1nS 1nS 1uS 2uS) SYMATTR InstName V2 SYMBOL sw 160 128 M180 WINDOW 0 -37 -42 Left 0 WINDOW 3 -41 -16 Left 0 SYMATTR InstName S1 SYMBOL ind2 368 -16 R180 WINDOW 0 -37 65 Left 0 WINDOW 3 -71 8 Left 0 SYMATTR InstName L7 SYMATTR Value 500nH SYMATTR Type ind SYMATTR SpiceLine Rser=1 Rpar=10k SYMBOL ind2 368 256 R180 WINDOW 0 -31 67 Left 0 WINDOW 3 -76 19 Left 0 SYMATTR InstName L8 SYMATTR Value 500nH SYMATTR Type ind SYMATTR SpiceLine Rser=1 Rpar=10k SYMBOL cap 336 32 R0 WINDOW 3 39 30 Left 0 SYMATTR Value 40nF SYMATTR InstName C3 SYMBOL res 448 16 R0 SYMATTR InstName R2 SYMATTR Value 60 TEXT 480 336 Left 0 !k L1 L2 L7 L8 1 TEXT 432 424 Left 0 !.tran 0 400uS 0 1nS TEXT -96 344 Left 0 !.model SW SW(Ron=0.1 Roff=1Meg Vt=5V)
D from BC myrealaddress(at)comic(dot)com British Columbia Canada