Module: Tuscan::Iec60584::TypeK

Extended by:
TypeK
Includes:
Math
Included in:
TypeK
Defined in:
lib/tuscan/iec60584/type_k.rb

Constant Summary collapse

T90_RANGE = 
-270.0..1372.0
EMF_RANGE = 
-5.892..54.887

Instance Method Summary collapse

Instance Method Details

#emfr_unbound(t90) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/tuscan/iec60584/type_k.rb', line 11

def emfr_unbound t90
  if t90 < 0.0
    Polynomial.new(
       0.000000000000e+00,  0.394501280250e-01,  0.236223735980e-04, -0.328589067840e-06,
      -0.499048287770e-08, -0.675090591730e-10, -0.574103274280e-12, -0.310888728940e-14,
      -0.104516093650e-16, -0.198892668780e-19, -0.163226974860e-22
    ).solve_for t90
  else
    Polynomial.new(
      -0.176004136860e-01,  0.389212049750e-01,  0.185587700320e-04, -0.994575928740e-07,
       0.318409457190e-09, -0.560728448890e-12,  0.560750590590e-15, -0.320207200030e-18, 
       0.971511471520e-22, -0.121047212750e-25 
    ).solve_for(t90) +
    0.1185976e+00 * exp(-0.1183432e-03 * (t90 - 0.1269686e+03)**2)
  end
end

#t90r_guess(emf) ⇒ Object 



28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/tuscan/iec60584/type_k.rb', line 28

def t90r_guess emf
  if emf < 0.0
    Polynomial.new(
       0.0000000e+00,  2.5173462e+01, -1.1662878e+00, -1.0833638e+00, -8.9773540e-01, 
      -3.7342377e-01, -8.6632643e-02, -1.0450598e-02, -5.1920577e-04
    ).solve_for emf
  elsif emf < 20.644
    Polynomial.new(
       0.000000e+00,   2.508355e+01,   7.860106e-02,  -2.503131e-01,   8.315270e-02,
      -1.228034e-02,   9.804036e-04,  -4.413030e-05,
       1.057734e-06,  -1.052755e-08
    ).solve_for emf
  else
    Polynomial.new(
      -1.318058e+02,   4.830222e+01,  -1.646031e+00,   5.464731e-02,  -9.650715e-04,
       8.802193e-06,  -3.110810e-08
    ).solve_for emf
  end
end