Исследование какого-то трансформатора.

V1 P2 P1  SIN(0 50 50)
R1 P1 P3 0.001

XMYNLTRN_T1 P3 P2  P4 P5 nl_transformer_1_0
R2 P4 P7 0.001
R3 P7 P5 res2


* transformer
.SUBCKT nl_transformer_1_0 2 1 4 3
    R0 2 5 66
    L0 5 6 146m
    A0 (6 1) (7 0) nlt_pq_4_10_lcpl_0
    A1 (7 8) nlt_pq_4_10_mcore
    A2 (8 0) (9 3) nlt_pq_4_10_lcpl_1
    L1 9 10 1.11m
    R1 10 4 500m
.ENDS
.MODEL nlt_pq_4_10_lcpl_0 lcouple(num_turns=1.622K)
.MODEL nlt_pq_4_10_mcore core(
+   H_array=[0 13.89 51.58 222.22]
+   B_array=[0 1 1.5 1.7]
+   area=130u length=76.15m
+   input_domain=10m fraction=TRUE mode=1)
.MODEL nlt_pq_4_10_lcpl_1 lcouple(num_turns=141)


.control

tran 0.1ms 2000ms

let v1 = v(P2,P3)
let cur1 = v(P3,P1)*1e3
* let pw1 = cur1*v1

let v2 = v(P5,P4)
let cur2 = v(P7,P4)*1e3
* let pw2 = cur2*v2

run

meas tran V1 RMS v1
meas tran I1 RMS cur1
* meas tran P1 RMS pw1

meas tran V2 RMS v2
meas tran I2 RMS cur2
* meas tran P2 RMS pw2

.endc

.end

$ echo -e "\n.param res2 = 30\n"| cat - spice/experiment-vac.cir|ngspice 

Circuit: 

Reducing trtol to 1 for xspice 'A' devices
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000

Warning: v1: no DC value, transient time 0 value used

Initial Transient Solution
--------------------------

Node                                   Voltage
----                                   -------
p2                                           0
p1                                           0
p3                                           0
xmynltrn_t1.5                                0
xmynltrn_t1.6                                0
xmynltrn_t1.7                                0
xmynltrn_t1.8                                0
xmynltrn_t1.9                                0
p5                                           0
xmynltrn_t1.10                               0
p4                                           0
p7                                           0
l.xmynltrn_t1.l1#branch                      0
l.xmynltrn_t1.l0#branch                      0
v1#branch                                    0
a.xmynltrn_t1.a2#branch_0_0                  0
a.xmynltrn_t1.a2#branch_1_0                  0
a.xmynltrn_t1.a0#branch_0_0                  0
a.xmynltrn_t1.a0#branch_1_0                  0

doAnalyses: TRAN:  Timestep too small; time = 0.0400057, timestep = 8.43038e-16: trouble with node "p2"


tran simulation(s) aborted
Reducing trtol to 1 for xspice 'A' devices
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000

Warning: v1: no DC value, transient time 0 value used
v1                  =  3.53529e+01 from=  0.00000e+00 to=  4.00057e-02
left-hand expression is too small (need 1320201)
i1                  =  8.64156e-03 from=  0.00000e+00 to=  4.00057e-02
v2                  =  1.63149e-02 from=  0.00000e+00 to=  4.00057e-02
left-hand expression is too small (need 1320201)
i2                  =  5.43811e-04 from=  0.00000e+00 to=  4.00057e-02
Note: No ".plot", ".print", or ".fourier" lines; no simulations run