73 lines
2.0 KiB
Plaintext
73 lines
2.0 KiB
Plaintext
ngspice transformers
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* single primary, single secondary, no core saturation
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* sources
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V1 1 0 dc 0 ac 1 sin (0 1 1k)
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Xtr1 1 0 2 0 tr1
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Xtr1a 1 0 32 0 tr1a psr=1m ssr=1m lp=1m ls=4m kt=0.98
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Xtr2 1 0 12 0 tr2
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Xtr3 1 0 22 0 tr3
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.tran 1u 10m
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* transformer 1
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* ngspice manual 3.3.10
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.subckt tr1 p1 p2 s1 s2
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Rp1 p1 pint1 1m ; primary series resistance
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Rs1 s1 sint1 1m ; secondary series resistance
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L1 pint1 p2 1m ; primary inductance
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L2 sint1 s2 4m ; secondary inductance
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K1 L1 L2 0.98 ; coupling constant
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.ends
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* transformer 1a
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* ngspice manual 3.3.10, with parameters replacing fixed values
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.subckt tr1a p1 p2 s1 s2 psr=1m ssr=1m lp=100u ls=100u kt=1
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Rp1 p1 pint1 {psr} ; primary series resistance
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Rs1 s1 sint1 {ssr} ; secondary series resistance
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L1 pint1 p2 {lp} ; primary inductance
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L2 sint1 s2 {ls} ; secondary inductance
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K1 L1 L2 {kt} ; coupling constant
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.ends
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* transformer 2
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* ngspice manual 12.2.20 and 12.2.21
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* px primary nodes, sx secondary nodes of electric circuit
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* mcx nodes of magnetic circuit
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.subckt tr2 p1 p2 s1 s2
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Rp1 p1 pint1 1m ; primary series resistance
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Rs1 s1 sint1 1m ; secondary series resistance
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a1 (pint1 pint2) (mc1 0) primary1
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.model primary1 lcouple(num_turns=120)
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a2 (sint1 s2) (0 mc2) secondary1
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.model secondary1 lcouple(num_turns=240)
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Rreluctance mc1 mc2 1000
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Lleak pint2 p2 1u ; (primary) leakage inductance
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.ends
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* transformer 3
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* C.P. Basso, Switched Mode Power Supplies, 2nd Ed., p. 406
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.subckt tr3 p1 p2 s1 s2 params: RATIO=2
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Rp1 p1 pint1 1m ; primary series resistance
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Rs1 sint1 s1 1m ; secondary series resistance
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Lp pint1 pint2 1m ; primary inductance
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Rp pint1 pint2 1Meg ; primary parallel resistance
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E 5 s2 pint1 pint2 {RATIO}
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F pint1 pint2 VM {RATIO}
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VM 5 sint1 0
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Lleak pint2 p2 1u ; (primary) leakage inductance
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.ends
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.control
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run
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set xbrushwidth=2
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plot V(1) v(2) V(1)+5 V(12)+5 V(1)+10 V(22)+10 V(1)+15 V(32)+15
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.endc
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.end
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