SIMPLORER User Manual V6.0 - FER-a

Irr[A]
Irrmax
i2 (sin)
i1 (exp)
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ts
i3 (cos)
SF1•ts
SF2•ts
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i4 (2=exp)
i4 (3=lin)
Temperature, Voltage, and Current Dependencies
SIMPLORER 6.0 — Manual 125
Component Parameters (+ Parameters of TYPE DYN=0 and TYPE DYN=1)
Description [Unit] Parameter Name Data Type
Reverse Recovery Form Factor 1, 2, and 3 R1/R2/R3 real
Exponential Temperature Coefficient of R2 ALPHA_TAU real
Linear Current Coefficient of R2 KAPPA_TAU real
Linear Voltage Coefficient of R2 SIGMA_TAU real
Reverse Recovery Soft Factor 1 and 2 SF1/SF2 real
The model parameters may depend on junction temperature, terminal voltage and current.
For the representation of these dependencies three groups of parameters were introduced:
• Coefficients for temperature dependencies
The names of these parameters start with ALPHA
• Coefficients for voltage dependencies
The names of these parameters start with SIGMA
• Coefficients for current dependencies
The names of these parameters start with KAPPA
Two different functions are used to model the dependencies. The original function is y=f(x)
The dependency on an additional value z (temperature, voltage, current) is expressed by the
coefficient in the following way (m stand for ALPHA, SIGMA, or KAPPA):
Linear Dependency:
ym 1 m z z – 0
= ⎛ + ⋅ ------------- ⎞fx ( )
⎝ ⎠
z 0
Exponential Dependency:
y ⎛---- z ⎞
m ⎝ ⎠
m
=
fx ( )
z 0
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R1•Irrmax
R2•Irrmax
R3•Irrmax
i5 (quad)
t
Temperature dependency can be linear or exponential while voltage and current dependencies
are always linear. Some parameters have more than one coefficient. In this case the individual
terms are multiplied. The reference values are always TEMP0, VNOM and INOM
respectively.