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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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Half Wave Uncontrolled Rectifier
b)For RL Load1) Create another page under same schematic and make the circuit usingsame steps.
Components used are:
VSin (voltage source)
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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Half Wave Uncontrolled Rectifier
c) For RC Load
1) Create another page under same schematic and make the circuit usingsame steps.
Components used are:
VSin (voltage source)
DIN4002 (diode)
R (Resistance)
C ( Capacitor)
GND_SIGNAL/CAPSYM
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2) Now simulate the circuit using same steps and get plots for resistance
current and capacitor voltage.
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Half Wave Uncontrolled Rectifier
d) For RL load with freewheeling diode
1) Create another page under same schematic and make the circuit using
same steps.
Components used are:
VSin (voltage source)
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 , 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.
Components used are:
VSin (voltage source)
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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Half Wave Controlled Rectifier
For type (2) connections (a) with zero time delay in gate pulse
1) Make the circuit using same steps.
Components used are:
VSin (voltage source)
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 and input
voltage.
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Half Wave Controlled Rectifier
For type (2) connections (b) with 4.1667ms time delay in gate pulse
1) Make the circuit using same steps.
Components used are:
VSin (voltage source)
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 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)