Examples consider the voltage controlled switch in the above image, with the following characteristics. The linked sites, articles and presented information are provided as a useful insight to help you decide on the type of engineering expert you might need. Included in this manual are detailed command descriptions, startup option definitions, and a pspice your microsoft windows users guide. After struggling with getting this to work in another sim, i was wondering if hesomeone could provide some tips into using this technique.
Orcad pspice ad how to use this online manual how to print this online manual welcome to orcad overview commands analog devices digital devices customizing device equations glossary index reference manual. Time varying voltage controlled capacitor ltspice or. If its name contains version xxplus, it describes the actual code status, found at the date of issue in the git source code management scm tool. Switch off the gate voltage switch s1 permanently now the device is in on state. This switch symbol uses the pspice model of a voltage controlled switch designated by vswitch which has a very low resistance. Voltage and current controlled switches voltage controlled. Pspice schematics is a schematic capture frontend program with a direct interface to pspice.
G voltagecontrolled s voltagecontrolled switch current source t transmission line. Simplifying the process for both, spice for power electronics and electric power, third edition illustrates methods of integrating industry standard spice software for design verification and as a theoretical laboratory bench. Input is a sinusoidal voltage with the peak value of 10v and the frequency of 1khz, i. Reference first i want to tell you a little bit about the history of pspice. Compare the pspice result with the mathcad results 4. Pspice ad reference guide montana state university. The third and fourth examples specify a 5 ma dc current source between node. Helpful pspice software and program files available. A switch does does only the former would be fine too. Ltspice iv getting started guideltspice iv getting started.
The lm317 device is an adjustable threeterminal positivevoltage regulator capable of supplying more than 1. For instance, suppose we wanted to make the voltage source above model. Figure 3 pspice plots of the instantaneous and rms load currents figure 4 thyristor test circuit as a test device as shown in fig. Pspice reference guide october 2012 3 product version 16.
Nc1 and nc2 are the positive and negative terminals of. The four types of dependent sources are listed below in table 1 along with their abbreviation, pspice name and library. Instruction set for simulating power electronics using. Pdf, located in the directory where pspice ad is installed. Crutschow posted an ltspice simulation in another thread that used a voltage controlled switch. As far i know with ltspice it is just possible to vary the charge. How to use this manual the manual is a work in progress. Orcadpspice manual izmir university of economics 3 b schematic editor a simple voltage divider fig. Orcad pspice ad how to use this online manual how to print this online manual. Modeling voltagecontrolled resistors and capacitors in pspice. Current dependent current voltage controlled switch voltage dependent current current dependent voltage independent current source lossless transmission line uniform rcline independent current source independentvoltagesource jfet transistor mutual inductance independent voltage source current controlled switch subcircuit.
Compare the pspice result with the mathcad results. Pspice tutorial create a new project and select analog or mixed ad. Included in this manual are detailed command descriptions, startup option. Voltagecontrolled switch 218 capture parts 219 ideal switches 219 voltagecontrolled switch model parameters 219.
V1 1 0 dc5v v1 1 0 5v i1 1 0 dc5ma i1 1 0 5ma the first two examples specify a dc voltage source of 5 v connected between node 1 and ground. The model parameters are derived from the manufacturers data and the thyristor is modeled as voltagecurrent controlled switch 1. Orcad pspice with probe is a circuit analysis program that lets. Vsw voltage controlled switch model online documentation. This document is for information and instruction purposes. Dependent sources dependent source abbreviation pspice name library voltage controlled. You can use the s, which is a voltage controlled switch if you want to control the switch state from a voltage source. Frequency response analysis of buckboost converter using averaged model. This can be modelled using a voltagecontrolled current source with voltage controlled by tablebased voltagecontrolled current source. The simetrix voltage controlled switch is compatible with pspice but note that in hysteresis.
As discussed in class there are four types of dependent sources, two are voltage sources and two are current sources. The simulationready voltage controlled switch component vsw can be found in the simulation special function integrated library \library\simulation\simulation special function. Current mode control of buckboost converter with slope compensation 14. Cadence pspice technology offers more than 33,000 models covering various types of devices that are included in the pspice software. May 17, 2011 failing to find a model for a momentarycontact pushbutton switch, i tried to see if i could use ltspices voltage controlled switch. Voltagecontrolled switch equations for switch resistance. But i have to change the capacitnace and keep the charge constant to simulate an electrostatic energy harvester.
Pspice schematic with current controlled voltage source note that the right side of the. Defines initial state of switch if control voltage is between upper and lower thresholds. Hi, i want to make a spice simulation with a time varying capacitor. Vsw voltage controlled switch model online documentation for. Designing the feedback control for a buck converter using the voltagemode control 12. Multisim component reference guide national instruments. Voltage controlled switch 218 capture parts 219 ideal switches 219. If vh is zero, the switch is always completely on or off depending upon whether the input voltage is above the threshold. Take small steps to get accurate holding current value. Other sources such as polynominal controlled source, exponential source, fmmodulated source, etc. Download pspice for free and get all the cadence pspice models. Pspice has many excellent models of transistors, thyristors and other devices that react to changes in a base circuit or a gate input.
Open a new pspice project and enter this schematic. Simulating mosfets in spice college of engineering. To insert and configure a switch in ltspice insert the symbol for the voltagecontrolled switch in your schematic press f2 and type sw in the search field of. It remains the customers responsibility to verify proper and reliable operation in the actual application. If vh is positive, the switch shows hysteresis, as if it was controlled by a schmitt trigger with trip points at. An annoying problem in pspice is the inability to change some properties of the part. Power electronics can be a difficult course for students to understand and for professors to teach. The blue line can be seen on right picture 0vbottomside. Ltspice includes a large number of excellent fet models, but sometimes you need to simulate a simple switch that opens and closes at specific times or under certain conditions. Use of voltage controlled switch in ltspice all about. Ltspice iv getting started guideltspice iv getting started guide. If you have a power outage or system failure, you can retrieve your work from these files. Microsim pspice ad how to use this online manual welcome to microsim overview commands analog devices digital devices. Pspice schematics is just one element in our total solution design flow.
You need to have a switch where open close is simulated. Spice for power electronics and electric power, 3rd. Cadence pspice technology offers more than 33,000 models covering various types of devices that are included. Voltage controlled switch equations for switch resistance. Page 79 configuring pspice schematics when autosave is enabled, pspice schematics creates a temporary file with the same name as the active working file, and a file name extension ending in for example. This can be modelled using a voltage controlled current source with voltage controlled by tablebased voltage controlled current source. In one environment, you can do all of the following using pspice schematics. Spice quick reference sheet the general anatomy of a. To insert and configure a switch in ltspice insert the symbol for the voltage controlled switch in your schematic press f2 and type sw in the search field of. Figure 1 above shows an example of a circuit with a current controlled voltage source. It requires only two external resistors to set the output voltage.
I mean the blue line which is the voltage output for the circiut. Comparison of frequency response of a buckboost converter in ccm and dcm 15. The device features a typical line regulation of 0. With over 500,000 copies distributed so far, many users have reported. Observe that i h dec 14, 2014 crutschow posted an ltspice simulation in another thread that used a voltage controlled switch. The spice model for the switch is very simple, so we simply include describe the model in the spice. The switch has three distinct modes of voltage control, depending on the value of the hysteresis voltage, vh. The material in this sheet is a basic start, but please feel free to. The vcs seems to be undefined when plopped down in my circuit. Failing to find a model for a momentarycontact pushbutton switch, i tried to see if i could use ltspices voltagecontrolled switch. Power electronics and simulation laboratory manual subject code.
Jan 27, 2011 prof saied moslehpour university of hartford by balvinder singh pabla download files. Simulating mosfets in spice oregon state university. This manual has comprehensive reference material for all of the pspice circuit analysis applications, which include. Id like to find a switch in the library that can let me tell it when it switch on and what the ron and roff will be. For information on these components, check the spice manual. In many cases, we need to use switches that open and close at certain times or under certain conditions of voltage or current. Now increase load resistancer2, so that anode current reducing, at some anode current the device goes to turn off. It is likely that the old url for this pspice tutorial will disappear on august 31, 2015.
Eldo users manual university of kentucky college of. Analyse its behaviour with probe, which can produce a range of plots. Historically this was a separate application but it is now integrated with pspice. To insert and configure a switch in ltspice insert the symbol for the voltagecontrolled switch in your schematic press f2 and type sw in the search field of the symbo. Orcad pspice optimizer, which is an analog performance. Mentor graphics reserves the right to make changes in specifications and other information contained in this publication without prior notice, and the. Multisim component reference guide january 2007 374485a01 componentref. Pspice includes pspice ad, pspice ad basics, and pspice. Microsim corporation 20 fairbanks 714 7703022 irvine, california 92618 microsim pspice ad circuit analysis software reference manual.
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