PSIM User Manual phần 2 potx

Resistor-Inductor-Capacitor Branches

PSIM User Manual 2-3

The nonlinear B-H curve is represented by piecewise linear approximation. Since the flux

density B is proportional to the flux linkage λ and the magnetizing force H is proportional

to the current i, the B-H curve can be represented by the λ-i curve instead, as shown

below.

The inductance is defined as: L = λ / i, which is the slope of the λ-i curve at different

points. The saturation characteristics can then be expressed by pairs of data points as: (i1,

L1), (i2, L2), (i3, L3), etc.

2.1.4 Nonlinear Elements

Four elements with nonlinear voltage-current relationship are provided:

- Resistance-type (NONV) [v = f(i)]

- Resistance-type with additional input x (NONV_1) [v = f(i,x)]

- Conductance-type (NONI) [i = f(v)]

- Conductance-type with additional input x (NONI_1) [i = f(v,i)]

The additional input x must be a voltage signal.

Image:

Attributes:

For resistance-type elements:

Parameters Description

Expression f(i) or f(i,x) Expression v = f(i) for NONV and v = f(i,x) for NONV_1

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