Introduction to orcad capture and pspice notes for demonstrators. Since we want to plot the voltage and current versus time, the transient analysis is used. Some simulation waveforms are given to verify the analysis. Ac analysis is used to calculate the smallsignal response of a circuit. The simulation program with integrated circuit emphasis spice became an industry standard for circuit simulation. Transient analysis for circuits with spice simulations advanced. Note that group delay is always computed based on unwrapped phase results, even if the unwrap option is not set. Analysis frequency domain analysis s determination of steadystate response of the circuit when sinusoidal excitation is applied mine the frequency response of the circuit. Configuring an ac analysis in multisim national instruments.
Although pspice can be used to solve for a lot of different problems, we will use it mainly for. Keown, orcad pspice and circuit analysis, 4th edition. The relevant software orcad pspice designer lite 17. Transient analysis is extremely useful for analyzing a circuits response due to an ac or dc driving voltage.
Remove the asterisks in front of the statements that refer to the inductor l1. Simulation settings for steady state analysis the results of the simulation are shown in figure 3. The result of the simulation for vout and vin are given in the figure below. Print ac command examples of ac circuit analysis summary of phasor analysis 6th tutorial. The circuit should reach steady state very quickly, in much less than one second. Helpful pspice software and program files available. It can perform dc analysis, steadystate sinusoidal ac analysis, transient analysis, and fourier series analysis. Since the frequency of v1 is 100hz, the period is 0. Pspice was a modified version of the academically developed spice, and was commercialized by microsim in 1984. Orcad pspice the handling procedure of circuit designing. In this mode the program calculates the time response of a. Coverage begins with dc circuit analysis, proceeds with ac circuit analysis, then goes into.
To gain an appreciation for an orderly and logical analysis of engineering problems. Orcad capture and pspice designer together provide a complete circuit simulation and verification solution with schematic entry, native analog, mixed signal, and analysis engines. Hi everyone, im working with orcad capture and pspice 16. An ac circuit is the one in which the source of the circuit is of alternating current rather than dc direct current.
The models are based only on steady state ac measurements and analysis. Using a stepbystep approach, it explains everything needed to understand pspice and apply it in a creative way to the analysis of electric and electronic circuits and devices. Transient analysis of boost converter based on pspice software. Course goals to gain a mathematical and physical understanding of circuit elements and circuits, in preparation for. Ac sweep andor other ac analysis features in pspice, and. A dialogue box shows the numerical values at the intersection of the crosswires. A simplied introduction to circuit simulation using spice opus. Sinusoidal steadystate analysis technical articles. After constructing the circuit, create a new simulation profile. Record the experimental inductor voltage in table 1. It was the first time i heard and work with the pspice software. Ac steadystate network analysis with multisim youtube.
The approach to steady state and transient response. Davies 2010 april 06 objectives this handout explains how to get started with cadence orcad version 16. Circuits containing only a single storage element are defined as firstorder networks and result in a firstorder differential equation i. In this mode the program calculates the currents through the branches and the electric potentials of the nodes of your electronic circuit. It can perform all the usual dc, ac steady state, and transient analyses. It can perform all the usual dc, ac steadystate, and transient analyses. Bias point the bias point analysis is the starting point for all analysis. Transient analysis for circuits with spice simulations.
The ac sweep analysis is a linear analysis and calculates what is known as the small signal response of a circuit over a range of frequencies by replacing any nonlinear circuit device models with linear models. Avoid production failures or latestage design changes with the ability to simulate and evaluate automotive ecu design blocks at. Recently active pspice questions page 4 electrical. The steady state usually means that temperatures are. Selection from analog design and simulation using orcad capture and pspice, 2nd edition book.
All the stages of store energy element of boost converter are also introduced. Davies september 18, 2008 abstract this handout explains how to get started with cadence orcad to draw a circuit schematic capture and simulate it using pspice. Microsim was purchased by orcad a decade later in 1998. Power electronics can be a difficult course for students to understand and for professors to teach. When the circuit contains nonlinear element such as. The orcad capture program was originally called schematic in the microsim. Chapter 4 ac analysis abstract the ac analysis is used to calculate the frequency and phase response of a circuit by frequency sweeping an ac source connected to the circuit. Coverage begins with dc circuit analysis, proceeds with ac circuit analysis, then goes into the various topics involving semiconductors. Introduction spice simulation program with integrated circuit emphasis is a computer program.
Introduction to orcad capture and pspice notes for. Analog design and simulation using orcad capture and pspice. The dc bias point analysis is run prior to the ac analysis, and is used to effectively linearize the circuit around the dc bias point. A slightly longer introduction to pspice imperial college london. In this case, we can analyze the circuit over any desired range of frequencies. Construction, analysis, and characterization of circuits with studentowned labinabox system.
To obtain current and voltage in a dc circuit, the analysis is performed with the simple load bias point. Pspice ad with a plot of the voltage in the potential divider. The orcad pspice software allows the user to input their circuits using a schematic capture program called capture or capture cis. Bias point, dc sweep, ac sweepnoise, and time domain transient. You wont even need coding skills if you use the right software.
It calculates all nodal voltages and branch currents over a range of values. Finding out more about ac sweep and noise analysis. The software is already installed in the computer of every station. Ac sweep and signal analysis understanding ac small signal analysis starhspice manual, release 1998. In this tutorial, i will help you do the analysis of an ac circuit. I wanted my plot to be more smooth so i have changed max step. Print ac command examples of ac circuit analysis summary of phasor analysis. Note that the period of the input waveform is approximately 3 seconds.
Time domain transient with max step size 100u and i get such plot. Orcad pspice and circuit analysis, 4th edition pearson. Problems with pspice simulation results all about circuits. Introduction to orcad capture and pspice notes for demonstrators professor john h. The models are based only on steadystate ac measurements and analysis. Spice simulation program with integrated circuit emphasis is a wellknown circuit simulator computer program which. Introduction to orcad capture and pspice professor john h. Types of analysis performed by pspice pspice is a generalpurpose circuit simulator capable of performing four main types of analysis. Orcad pspice the handling procedure of circuit designing software. This examp le creates a 10 k sine wave wit h the amplitude parameterized so that it can be swept during a simulation.
If any ac sources are present in the circuit, those sources are set to zero. Bias point or dc analysis find the steady state condition of a circuit. Pspice is a simulation program that models the behavior of a circuit. And unlike every others student in my circuit theory, i didnt take ee100, which offer for freshman student. There are examples of all four types of standard simulation and a selection of different plots. In ac analysis, the dc operating point is first calculated to obtain linear, smallsignal models for all nonlinear components. Another approach is to use ac analysis under pspise. Pspice is a general purpose program designed for a wide range of circuit simulation including the simulation of nonlinear circuits, transmission lines, noise and distortion, digital circuits, mixed digital and analog circuits. Analog design and simulation using orcad capture and pspice provides stepbystep instructions on how to use the cadenceorcad family of electronic design automation software for analog design and simulation. In addition to dc circuit analysis and transient analysis, pspice can be used to work steady state phasor problems. The steadystate usually means that temperatures are. A commercial version of the spice, pspice, developed by microsim bought by orcad, now bought by cadence, has many additional features. Spice for power electronics and electric power, 3rd.
It is used for circuits with timeinvariant sources e. The type of simulation performed by pspice depends on the source specifications and control statements. Before starting, you should make sure that you have the prerequisite pspice skills introduced. Only the components in the pspice library will simulate correctly. Avoid production failures or latestage design changes with the ability to simulate and evaluate automotive ecu design blocks at any level of abstraction. Since the differences appear to be in the software, they cannot be explained by coilcraft at this time.
The vac is only for ac analysis whereas the vsin has sine source parameters and an ac parameter for the ac magnitude, usually set to 1, so that you can use the same source for ac, or transient analysis. Ece 201 lab 6 introduction to spicepspice before you begin prerequisite labs resistive circuits. Transient analysis linear inductors linear capacitors transient analysis use of the. Implementing models in pspice coilcraft critical products. Also, compute and record the percent deviation between experimental and theory in table. The following example illustrates a pspice ac analysis of the same above simple circuit. It includes examples of all four types of standard simulation and a selection of different. As expected, the voltage and current produced have the same frequency as the input.
May 30, 2019 instead, you can conduct transient analysis for circuits in the time domain using a simulator. In addition to dc circuit analysis and transient analysis, pspice can be used to work steadystate phasor problems. Nov 15, 2015 technical article sinusoidal steady state analysis november 15, 2015 by donald krambeck delve into phasor concepts and transforming a circuit with circuit analysis techniques to solve a given circuit in the frequency domain. Introduction to pspice objectives a primary purpose of this lab is for you to become familiar with the use of pspice and to learn to use it to assist you in the analysis of circuits. Ltspice iv steady state ac analysis university of evansville july 27, 2009 in addition to ltspice iv, this tutorial assumes that you have installed the university of evansville simulation library for ltspice iv. See setting up analyses on page 282 for a description of the analysis setup dialog box. The glaplace element is used in pspice to describe a frequencydependent impedance.
Ac statement ac sweep and signal analysis 98 starhspice manual, release 1998. Then, the equivalent circuit is analyzed from a start to a stop frequency. In the ac sweep you also have the option of noise enable in which pspice will simulate. Pspice simulation software can help users verify performance issues, complete risk assessments, and identify integration problems before hardware freeze. A commercial version of the spice, pspice, developed by microsim. Probe command example of transient analysis 5th tutorial.
For example, if we ask pspice its calculations for vmn and i and it said, 4. Course goals to gain a mathematical and physical understanding of circuit elements and circuits, in preparation for more advanced courses and applications. Network theory response of dc circuits if the output of an electric circuit for an input varies with respect to time, then it is called as time response. To introduce the student to a popular computeraided circuit analysis software program called pspice. However, the true impact on the results will depend on which parameter it is and the nature of the circuitsimulation. 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.
Spice for power electronics and electric power, 3rd edition. It can perform dc analysis, steady state sinusoidal ac analysis, transient analysis, and fourier series analysis. This library extends ltspice iv by adding symbols and models that make it easier for students with no. Pspice schematic probes are placed in the circuit to measure the voltage across the resistor and the current through the inductor. You will be introduced to each of these as the semester progresses. A simplied introduction to circuit simulation using spice opus 5 a. The analyses usually executed in pspice are listed below. Pspice is positive, then pspice will return a positive number. We can also easily measure the magnitude and phase of any desired signal in steadystate at any desired frequency. For sinusoidal steady state analysis, pspice can display the waveform at a fixed frequency.
Robinson never explained in detail how to create and run a circuit in pspice. If the current value returned by pspice is positive, then current flows in at node m and out of node n. Network theory response of dc circuits tutorialspoint. The overall working stages of boost converter, especially the transient process from start to steadystate, are simulated and analyzed by pspice in this paper.
The ac analysis will apply a sinusoidal voltage whose frequency is swept over a specified range. Organized into 22 chapters, each with exercises at the end, it explains how to start capture and set up the project type and libraries. It is likely that the old url for this pspice tutorial will disappear on august 31, 2015. The software creates a spice input file from this diagram and performs the analysis. The overall working stages of boost converter, especially the transient process from start to steady state, are simulated and analyzed by pspice in this paper. The type of parameter describes the type of analysis to perform ac, dc or trans transient. Create a simulation profiler for the transient analysis and run pspice. Rc and rl transient examples in this tutorial, we will look at simulating rc and rl transients. Ece 3074 ac circuit analysis laboratory ece virginia tech. We can also easily measure the magnitude and phase of any desired signal in steady state at any desired frequency.
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