labmanual ORCAD

7/30/2019 labmanual ORCAD

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Analysis and Design of PowerElectronic Circuits using Orcad

Professor Babak Fahimi, PhD

Director, Power Electronics and Controlled Motion Laboratory

University of Texas at Arlington


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Getting started with PSpiceTo start with a PSpice project:

1) Go to capture CIS Lite Edition2) Go to File menu. Select New Project option.

3) Choose analog or mixed A/D option and specify the project name andits location and click Ok


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4) Once the step 3) is completed the following window appears. Choose

Create a blank project option


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5) Create the circuit by placing all its parts using Part option from

Part menu. In this way a complete electrical circuit can be formed.


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Points to remember

When creating a new project , use Analog or Mixed A/D set-up option.

Watch the file location / directory structure.


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Design and simulation of power electronic circuits

Power Electronic Circuits can be classified as:

DC-DC Converters

AC-DC Converters (Rectifiers)

DC-AC Converters (Inverters)

AC-AC Converters

Now design and simulation of each of these circuits will be discussed.


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AC-DC Converters (Rectifiers)

AC-DC converters ( Rectifiers) can be classified as:

Half wave rectifier

Full wave rectifier

These can further be classified depending upon the rectifying element beingused . If using diode, are called uncontrolled rectifiers. Whereas if using

thyristor, are called controlled rectifiers.


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Half Wave Uncontrolled Rectifier

a)For Resistive Load1) Make the circuit in PSpice using steps mentioned earlier.

Components used are:

VSin (voltage source)

DIN4002 (diode)

R (Resistance)

GND_SIGNAL/CAPSYM.


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2) Make the simulation profile using New Simulation Profile command

from PSpice menu.


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3) Go to Edit Simulation Profile in PSpice menu, simulation settings

window will open. Go to Analysis and set the simulation parameters

as shown below.


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4) Run the simulation by using command RUN from PSpice menu.


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5) Get plots for IR1(resistance current), RMS value of IR1 and V1(input

voltage) using Add Trace command from Trace menu


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6) Plot the resistance current and then use Fourier command from

Trace menu to get the frequency response of the resistance current.


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b)For RL Load1) Create another page under same schematic and make the circuit usingsame steps.



DIN4002 (diode)

R (Resistance)

L ( Inductor)

GND_SIGNAL/CAPSYM


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2) Now simulate the circuit using same steps and get plots for resistance

current and input voltage.


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c) For RC Load

1) Create another page under same schematic and make the circuit usingsame steps.



DIN4002 (diode)

R (Resistance)

C ( Capacitor)

GND_SIGNAL/CAPSYM


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current and capacitor voltage.


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d) For RL load with freewheeling diode

1) Create another page under same schematic and make the circuit using

same steps.



DIN4002 (diode)

R (Resistance)

L ( Inductor)

GND_SIGNAL/CAPSYM


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current , RMS value of resistance current and input voltage.


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Half Wave Controlled Rectifier

For type (1) connections

1) Make the circuit using same steps.



VPULSE (voltage source)

2N1595 (Thyristor) R (Resistance)

GND_SIGNAL/CAPSYM


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2) Now simulate the circuit and get plots for resistance current.


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For type (2) connections (a) with zero time delay in gate pulse





2N1595 (Thyristor)

R (Resistance)

GND_SIGNAL/CAPSYM


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2) Now simulate the circuit and get plots for resistance current and input

voltage.


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For type (2) connections (b) with 4.1667ms time delay in gate pulse





2N1595 (Thyristor)

R (Resistance)

GND_SIGNAL/CAPSYM


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2) Now simulate the circuit and get plots for resistance current and input

voltage.


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Full Wave Uncontrolled Rectifier

Full wave uncontrolled rectifier can be :

Single phase

Three phase


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Single Phase Full Wave Rectifier

1) Make the circuit as shown:


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2) Simulate the circuit and get plots for all diode currents.


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Three Phase Full Wave Rectifier

1) Make the circuit as shown:


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2) Simulate the circuit and get plots for all diode currents.


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Points to remember

In order to simulate the circuit signal reference must be named 0 ( the

number zero)

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