All attendees of this 4 day class will receive a hard copy of the book switchmode power supplies by christophe basso, a demo copy of the simulation software, example files from the book and developed by the instructor, hard copy and electronic copy of the overhead presentation, and a certificate of completion. Pspice schematic with current controlled voltage source note that the right side of the device goes where the voltage source appears in the circuit. In the component selection window press f2 button in the main screen to get there this switch is located in the root directory place this component in the circuit, click on. Pspice student is sometimes distributed under different names, such as pspice student thinstalled. The simetrix voltage controlled switch is compatible with pspice but note that in hysteresis mode, the simetrix switches in a controlled time whereas the pspice. Aug, 2012 in this video we will be looking at the voltage controlled witch componant in ltspice as well as a way to create a voltage controlled resistor using a resistor, voltage source, and some simple.
If vh is zero, the switch is always completely on or off depending upon whether the input voltage is above the threshold. Try replacing i1 with a 5v source and making r6 1k. The switch model allows an almost ideal switch to be described in spice. The four types of dependent sources are listed below in table 1 along with their abbreviation, pspice name and library. Cadence pspice technology offers more than 33,000 models covering various types of devices that are included in the pspice software. This download was checked by our antivirus and was rated as virus free. This popular version of spice, available from orcad now cadence runs under the pc platforms. As a result, any changes to the if, vcc or rl will lead to a change in ctr, tr and capacitance cint. Jan 24, 2014 overview of entering circuits with controlled sources in orcad. Unauthorized duplication of the software or documentation is prohibited by law. A switch does does only the former would be fine too. One of fun parts of spice is you can make up parts that do not exist. An3005 modeling phototransistor optocouplers using pspice.
I have the intusoft model but pspice doesnt like it and it is too late tonight to get my brain around why. Using pspise, how do you utilize switches and dip switches. In the component selection window press f2 button in the main screen to get there this switch. The current drawing and all subsequent new drawings use the style you select.
Heres why it appears not to be working at the start of the sim, c1 is already charged up to approximately 1v because the switch has a finite but large off resistance and the simulator assumes that the switch has been open circui and that 1v has been applied for an infinite time prior to the start of the sim at t0. I want to place an operational amplifier ad8221, op1177 and a modulatordemodulatorad630ar in. Instructions for ee 42 pspice assignment you can install. In the transient analysis use a final value of 6 second. Files and libraries compatible with microsim pspice evaluation version 8. As described in the license agreement, you are permitted to run one copy of the microsim software on one computer at a time. Hence if anyone knows a pspice fuse model it would save my brain some strain. There has to be a better way and dont bother with advising me to seek better software. Sens sensitivity analysis a9 w current controlled switch a23. 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. Instructions for ee 42 pspice assignment you can install them.
The original circuit includes an ideal switch, which is not modeled in pspice. An evaluation student version, which can handle small circuits with up to 10 transistors, is freely available. The first is a 0v voltage source, which acts as an ammeter, to measure the current input and then the actual current controlled current source that references it. Power electronics can be a difficult course for students to understand and for professors to teach. You can use the s, which is a voltage controlled switch if you want to.
Pspice simulates the circuit, and calculates its electrical characteristics. For a full fledged version or for more information, please contact orcad. The software is used mainly by electronic design engineers and electronic technicians to create electronic schematics, perform mixedsignal simulation and electronic prints for manufacturing printed circuit boards. Currentcontrolled switch equations for switch resistance 234 currentcontrolled switch equation for noise 234 subcircuit instantiation 235 igbt 236 capture parts 237. It is likely that the old url for this pspice tutorial will disappear on august 31, 2015. Voltage controlled switch not working circuitlab support. In many cases, we need to use switches that open and close at certain times or under certain conditions of voltage or current. The first is a 0v voltage source, which acts as an ammeter, to measure the current input and then the actual currentcontrolled current source that references it. Power electronics laboratory using pspice muhanunad h. A voltage controlled switch must have a model defined. Controlled sources circuitlab support forum circuitlab. This switch symbol uses the pspice model of a voltagecontrolled switch designated by vswitch which has a very low resistance ron in its onstate, when the control voltage is. Orcad systems corporation was a software company that made orcad, a proprietary software tool suite used primarily for electronic design automation eda.
Aa for a current controlled current source cccs and av siemens for a voltage controlled current source. Typically done as a spice directive placed directly on the schematic. As discussed in class there are four types of dependent sources, two are voltage sources and two are current sources. 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. Va ohms for a current controlled voltage source ccvs.
The command file is read by the program and all of the commands contained. The symbolic name of this switch is csw, and its file name is csw. I mean the blue line which is the voltage output for the circiut. Orcad pspice ad how to use this online manual how to print this online manual welcome to orcad overview. An3005 modeling phototransistor optocouplers using pspice simulation. From the options menu, select editor configuration options menu to display the editor configuration dialog box. Pspice thyristor dc switch electrical engineering stack. And pspice is a product of the orcad corporation and the student version we are using is. Again try to satisfy the on,off criteria of the switch as indicated with the switch schematic. Pspice doesnt have a method to probe the derivative of current. The only way i can simulate a circuit to determine the voltage across the load is without a switch and just putting in wires to represent the digital increment.
Currentcontrolled switch equations for switch resistance. Unlike spice, it does not need to be a voltage source. To round the corners on the outside border line, select the rounded corners. The current controlled current source actually implements two individual devices, as can be seen from the netlist template. Instead of using a switch, you will run simulations of two versions of the circuit. The program ltspice allows to use a switch controlled by current of independent source.
The currentcontrolled current source actually implements two individual devices, as can be seen from the netlist template. Pspice ad digital simulation condition messages 61. For the current controlled switch, the controlling current is that through the. The currentcontrolled voltage source is also in the analog library. Pspice model library includes parameterized models such as bjts, jfets, mosfets, igbts, scrs, discretes, operational amplifiers, optocouplers, regulators, and pwm controllers from various ic vendors. Also for performance evaluation in terms of parameters such as power factor, and total harmonic factor. Isw current controlled switch model online documentation for.
Pspice reads them in but does not execute the line. The tutorial starts under the assumption that the demo version of pspice is installed on your computer. Whenever we want to plot a voltage or current as a function. It will produce very high voltages to make the 100a flow through the gate even if the switch is open. I want a opamp, voltage comparitor, amp with gain, buffer, inverter, withwithout hysteresis, current limit, delay, etc. Figure 1 above shows an example of a circuit with a current controlled voltage source. This allows current to flow or not in other parts of a circuit. Dependent sources dependent source abbreviation pspice name library voltage controlled. Fsrc currentcontrolled current source model online. Temp temperature a10 sources transient source descriptions a24 line comment lines that start with a are comment lines. Consider the current controlled switch in the above image, with the following characteristics. I have to learn and use the pspice jungle for this and many more assignments to come. Spice for power electronics and electric power, 3rd edition.
The blue line can be seen on right picture 0vbottomside. Pspice has many excellent models of transistors, thyristors and other devices that react to changes in a base circuit or a gate input. How to model a voltage controlled switch in hspice. Use pspice and probe to obtain the transient response of the capacitor voltage and capacitor current separately on one page. 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. The swich is connected with vpulse source whis values are. If vh is positive, the switch shows hysteresis, as if it was controlled by a schmitt trigger with trip points at. Powermanagement ics cut active and sleep current by up to 50% may 05 2020, 3. 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.
Because a transistors collector current is proportionally limited by its base current, it can be used as a sort of currentcontrolled switch. Apr 11, 2010 pspice doesnt have a method to probe the derivative of current. Pspice can be used for design verifications of power electronics circuits. In this video we will be looking at the voltage controlled witch componant in ltspice as well as a way to create a voltage controlled resistor using a resistor, voltage source, and some simple. Currentcontrolled switch equations for switch resistance 234.
Instruction set for simulating power electronics using. Spice for power electronics and electric power, 3rd. Its vv for a voltage controlled voltage source vcvs. The bipolar junction transistor bjt as a switch bipolar. Download pspice for free and get all the cadence pspice models. Current controlled switch model parameters 233 special considerations 233 current controlled switch equations 233 current controlled switch equations for switch resistance 234 current controlled switch equation for noise 234 subcircuit instantiation 235 igbt 236 capture parts 237 setting operating temperature 237 igbt device parameters 238. Isw current controlled switch model online documentation. Use of pspice model in ltspice mosfets from infineon.
Also pspice is a simulation program that models the behavior of a circuit. I have the intusoft model but pspice doesnt like it and it is too late tonight to get my brain. Eightchannel input module handles bridge, current, voltage, and iepe measurements may 05 2020, 2. The method used to plot any voltage or current versus time in a second order circuit is the same as that used for a first order circuit. Trying to calculate switching losses in excel has many downsides many parameters to enter, not given by vendor in flat file. 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.
The best method you can do is use the save data method, take it to a different software which can take the derivative of discrete data, and plot its results. I read the pspice user giude and saw about this swich, but didn figure out how to controll it. Browse cadence pspice model library cadence pspice technology offers more than 33,000 models covering various types of devices that are included in the pspice software. Pin2 negative controlling node is connected to net gnd. Notice that the transfer equation for the g1 is a complex equation involving power, ln and e.
The transistor can be used as a switch if biased in the saturation and cutoff regions. Set so resistance rises slowly with current, then snap email me the intusoft model. Subckt subcircuit definition a9 x subcircuit call a24. In pspice, you may use a current controlled switch, such as w device,or a voltage controlled switch, such as s device above. Excellent free software versions available, or export netlist to any spice e. Pin1 positive controlling node is connected to net in. Overview of entering circuits with controlled sources in orcad.
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