Model inductor

In maldug electrochemical impedance measurements, one vec tor is examined, using the others as the frame of reference. The voltage vector is divided by the current vec tor, as in Ohm s law. Electrochemical impedance measures the impedance of an electrochemical system and then mathematically models the response using simple circuit elements such as resistors, capacitors, and inductors. In some cases, the circuit elements are used to yield information about the kinetics of the corrosion process. 

EIS data is generally interpreted based on defining an appropriate equivalent circuit model that best fits the acquired data. The elements of the circuit model involve a specific arrangement of resistors, capacitors, and inductors that tacitly represent the physicochemical reality of the device under test. Under these circumstances the numerical value for chemical properties of the system can be extracted by fitting the data to the equivalent circuit model. Impedance measurements are typically described by one of two models ... 

Most of the devices used by PSpice can include temperature effects in the model. Most of the semiconductor models provided by Oread include temperature dependence. By default, the passive devices such as resistors, capacitors, and inductors do not include temperature dependence. To make these items include temperature effects, you will need to create models that include temperature effects. The temperature dependence of resistors is discussed in Section 4.G.I. In this section, we will show only how the I-V characteristic of a 1N5401 diode is affected by temperature. The D1N5401 diode model already includes temperature effects so we will not need to modify the model. We will use the standard resistor, which does not include temperature effects. We will continue with the circuit of Section 4.B ... 

The inductor model is used to specify inductor voltage dependence. The value of the inductance used in the simulation is ... 

Tnom - the nominal temperature, 27°C Note that if an inductor model is not specified, all model parameters are set at their default values and the value in the simulation is the value specified in the schematic. 

Model LJin IND (IL1=5 ) - inductor with current dependence... 

The inrush current of an EMI filter is usually examined to ensure that no parts are overstressed during power-up. If the inductor does not saturate, the inrush current is described by Faraday s law and can easily be modeled by mathematics or a simple SPICE model. It is also not too difficult to determine if a core is saturated during turn-on. A slightly more difficult calculation is to determine what the maximum current will be under a given turn-on condition. The hardware used for measurements used a transformer made of two stacked 55025 cores... 

The transient domain model shown in Fig. 4.33 was used to measure output ripple voltage, transient response, gate voltage, and inductor current. This model properly predicts the cycle-by-cycle switching effects of the regulator. 

A comparison between the step load response using the transient domain model and the state space average model is shown in Fig. 4.49, while a similar comparison of the output inductor current during the transient step load is shown in Fig. 4.50. 

Figure 4.50 Average versus transient model step load response of inductor current.

Figure 4.53 SIMetrix results transient model, step load response, inductor current...

To model the transformer, an ideal center-tapped transformer is combined with a nonlinear core model for the F material. As this circuit counts on the saturation of the core, a SPICE primitive inductor will not work. By adding this nonlinear core model across the input of the center-tapped transformer, the magnetizing inductance and saturation characteristics of the core are realized. 

In this model, it is assumed that the energy of the oscillator is stored in a capacitor C, its losses are represented by resistor R and the mass loading by inductor L. The static capacitance of the crystal with the electrodes is shown as capacitor C0. The transfer function of this oscillator is governed by two equations.The first is... 

Figure 4.6. a Resistor and inductor in series (Model D5) b Nyquist plot of resistor and inductor in series connection over the frequency range 1 MHz to 1 mHz (Model D5 R = 10 a, L = 0.0001 H)... 

Figure 1 An adsorption (top)-desorption (bottom) model for chiral induction on a zeolite surface, incorporating a reactant (tropolone alkyl ether, shown at the left), a chiral inductor (with four different substituents, at the right), and a cation (small ball on the surface). Tropolone s carbonyl and ether oxygens hydrogen-bond to chiral inductor, while its tt system interacts with zeolite s cation ion. ...

Figure 14 A cartoon representation of tropolone methyl ether and norephedrine included within a supercage under wet and dry conditions. The model helps to rationalize the difference in ee obtained under the two conditions. Dark circles represent the cations. Hydrogen bonding between the chiral inductor and interaction between the cation and TME are disturbed by water molecules.

The use of inductors to model low-frequency inductive loops in an impedance response is somewhat controversial. Demonstrate that the circuit presented as Figure 4.6(b) with negative R and C in the nested element can be mathematically equivalent to a circuit containing an inductor... 

Fig. 3.9. Numerical modelling of molten zone (a) and inductor and calculated shape of the cross section (b) [12]...

A. Muiznieks, A. Rudevics, K. Lacis, H. Riemann, A. Liidge, F.W. Schulze, B. Nacke, Square-like silicon crystal rod growth by FZ method with especially 3D shaped HF inductors. International Scientific Colloquium Modelling for Material Processing, Riga, 2006... 

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