Analysis and Design of Power Electronic Circuits using Orcad

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Analysis and Design of Power Electronic Circuits
using Orcad

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Getting started with PSpice

• To start with a PSpice project
• Go to capture CIS Lite Edition
• Go to File menu. Select New Project option.
• Choose analog or mixed A/D option and specify
  the project name and its location and click Ok

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Once the step 3) is completed the following
window appears. Choose Create a blank project
option

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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 being used . 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 Load
• 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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• Make the simulation profile using New Simulation
  Profile command from PSpice menu.

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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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Run the simulation by using command RUN from
PSpice menu.

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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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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 Load
• 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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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
• Create another page under same schematic and make
  the circuit using same steps.
• Components used are
• VSin (voltage source)
• DIN4002 (diode)
• R (Resistance)
• C ( Capacitor)
• GND_SIGNAL/CAPSYM

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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
• 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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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
• 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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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
• 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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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
• 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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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

• Make the circuit as shown

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Simulate the circuit and get plots for all diode
currents.

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Three Phase Full Wave Rectifier

• Make the circuit as shown

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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)