Questions tagged [modelling]

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128 views

LED lighting for use in miniature tanks

Novice, built a model for a popular wargame. I built a modular tank using magnets for multiple variants from 1 kit. I hope to add some LEDs (max of 20 3V) & fibre optic lights on the vehicle and ...
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1answer
51 views

3 phase cable equivalent circuit

I am trying to build an equivalent circuit for a 3-ph+N cable. Could you help me to identify the parameters. In the picture, you can find the primitive impedance matric for the cable and the proposed ...
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0answers
46 views

Help with SPICE parameter (in)dependence and real transistors

I am simulating an IC off a manufactures datasheet schematic using suggested integrated BJT Spice parameter values from a textbook. The simulation works well BUT i need to increase storage time and ...
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60 views

Pressure to current conversion

I was trying to convert the pressure values (in psi) into 4-20mA current. The range of pressure values I have chosen is between 0-10Psi. But according to the link given below the pressure from 3-15Psi ...
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0answers
29 views

Maglev Modelling and Control System Design

Im trying to model a Maglev system (schematic seen below) the system paramentres are below aswell. Im aiming to try and get a state space represetation for the system. This is what i have done by ...
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1answer
114 views

Linearization of Non Linear State Space Model

Im designing a PI controller for a Maglev experiement but im a little stuck on how to linearize the non linear state space model. I have developed the state equations (seen below) and i know the ...
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2answers
69 views

What interesting application areas utilise electrical engineering simulation tools, e.g modelling mechanical analogues? [closed]

Electrical simulation methods have been developed extensively to simulate electrical and electronic circuits. It is commonly recognised that there are electrical analogs to mechanical components ...
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0answers
23 views

How do I determine the parameters for a battery equivalent model?

I have these pieces of information of a battery from which I want to estimate the battery equivalent RC parameters. Let it be first order or second order. I have a performance curve detailing battery ...
4
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1answer
1k views

Lookup tables in LTspice

I'm trying to implement at fuel cell in LTspice, using the lookup table function and a Arbitrary Behavioural Voltage Source (ABVS). I specify the I-V relationsship from the datasheet as: V = table(I,...
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1answer
127 views

Modified Gummel-Poon BJT Modelling Issue

First of all, sorry for my bad english. Output for Vb: From the schematic above, I redrew the 2N3904 BJT into the modified Gummel-Poon model. Output for Vb: The equation for B1, B2 and B3 were ...
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2answers
148 views

Overlay plots from PSpice - SIMetrix or SIMetrix to PSpice

I wanted to verify the accuracy of a identical model which I modelled, between PSpice and SIMetrix simulator I ran model in Pspice and SIMetrix separately and probed required nets (net names are ...
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1answer
37 views

Harmonics modelling in electrical machines

I am currently working with a permanent magnet synchronous machine and I am trying to model the harmonics caused by magnetic saturation, dead time, and non linearities of the frequency inverter. It ...
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2answers
203 views

What is wrong with my inverted pendulum?

I have been making an inverted pendulum using LQR. Here's a list of my hardware: Microcontroller: Microchip WiFIRE (PIC 32) Motor Control: L298N Encoders (2x): US Digital shaft encoders (4095 ...
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3answers
103 views

Modelling the equivalent series resistance's voltage in a circuit

Say a 2H inductor has an equivalent series resistance of 2000 ohm at a particular frequency. Logically to me, that inductor would be modeled as an inductor in series with a resistor. However, that ...
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1answer
102 views

How determinate parameters for thermal-model battery (Advanced question about battery modelling)

I'm trying to simulate an electrical model based on Ceraolo battery model for lead-acid battery. The challenge in this model is to determine the parameters that describe it. I can understand and ...
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2answers
90 views

Calibrating DAQs

I'm using some of National Instruments' DAQs for some measurements, but their calibration is slightly off. To work around this I am hoping to factor in any imperfections into the measurements such ...