Transformer Training Board Power Supply

1
Transformer Training BoardPower Supply

• Advisor Dr. Michael Mazzola
• Team Members Gary Hutson, James Roberts, James
  Jackson, and Kenny Beverin

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Team Members
Gary Hutson
James Roberts
James Jackson
Kenny Beverin
3
Team Responsibilities
James Roberts Research DC-AC Inverter PSpice
Gary Hutson Web Designer Rectifier Circuit DC-AC
Inverter
Kenny Beverin Stock Market Manager Executive
Summary PWM Controller
James Jackson Documentation References Design
Requirements
4
Purpose

• To build a Power Supply that produces the desired
  output and is
• Light weight
• Small
• Durable
• Quiet

5
Design Requirements

• The 3-phase output voltage THD should
• be limited to 5.
• The phase to phase voltage should be limited
  to 43 volts /- .5 volts
• The weight limit is 20 pounds.
• The size should be 12 cubed.

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Basic Topology
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Rectifier (Simulated Unfiltered)
Amplitude 170V Average 108V
8
Rectifier (Actual Unfiltered)
9
DC Link Filter
10 Ripple Voltage Filter values C 91.7uF L
109.6mH
10
Rectifier Output (Simulated Filtered)
Ripple Voltage 7.35
11
Rectifier Output (Actual Filtered)
Ripple Voltage 12.6 V Peak Voltage 165 V
Ripple Voltage 7.64
12
DC to DC Converter

• Input from Filter
• 170V DC unregulated
• Regulated Outputs
• - (24VDC) Control Power
• PWM Power
• Phase Shifter
• Function Generator
• DC Bias Circuit
• - (90VDC) Inverter Power

13
Inverter

• 90VDC to 43VAC
• 3-Phase Half Bridge Topology
• Power MOSFETs
• PWM Controlled

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Half Bridge Inverter
15
Controller Selection

• Square Wave
• Pulse-Width Modulation

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Square Wave (Control Pulse)
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Inverter Output (Square-Wave)
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Harmonics
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PWM Controller topology
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Function Generator

• Supplies a Sinusoidal Reference signal
• 3 Volts peak to peak

Symmetry adjuster
Amplitude adjuster
Sine shape adjuster
Resistor and capacitor for frequency adjust
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Reference Signal Offset

• Signal from Function Generator

PWM Expected Signal
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DC Bias Circuit
DC Bias Control
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Phase Shifter (Simulated)
Shifts signal -120º
Shifts signal 120º
Base signal - 0º
24
Phase Shifter (Actual)
25
Pulse Width Modulation
26
PWM Block Diagram
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PWM Circuit
Dead-time control resistors
PWM pulses
Timing capacitor and resistor to determine
switching frequency
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Switching Frequency
and PWM Pulses
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PWM Isolation
An Isolation Relay will be used to isolate the
PWM circuit from the Inverter Bridge
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Low Pass Filter and Load
C 1.5uF
Low Pass Filter
Artificial Load
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Final Output
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The Load
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Future Plans

• Improve THD
• Obtain desired Voltage
• Package the product
• Provide protection from over current
• Provide thermal protection

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Acknowledgements

• Dr. Mazzola for his continued support
• Robert Cheney from Alabama Power
• Roger D. Marcus from Alabama Power

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Demo

• The Unfiltered DC Voltage
• Filtered DC Voltage
• Function Generator
• Phase Shifter
• PWM Pulses and Control signal
• Output

36
References
1   I. M.Gottlieb, Electronic Power Control,
TAB Books, Blue Ridge Summit, PA, USA,
1991.  2   B. Jayant Baliga, Modern Power
Devices, John Wiley Sons, New York, New York,
USA, 1987.  3   N. Mohan, Tore M. Undeland, and
William P. Robbins, Power Electronics
Converters, Applications, and
Design, John Wiley Sons, New York, New York,
USA, 1989.  4   I. M. Gottlieb, Power Control
with Solid State Devices, Reston Publishing
Company, Inc., Reston, Virginia, USA,
1985.  5   B. Norris, Microprocessors and
Microcomputers and Switching Mode Power Supplies,
McGraw-Hill Book Company, New York, New York,
USA, 1978.  6   B.W. Williams, Power
Electronics Devices, Drivers, and Applications,
John Wiley Sons, New York, New York, USA,
1987.  7   B. K. Bose, Microcomputer Control of
Power Electronics and Drives, IEEE Press, New
York, New York, USA, 1987.  8   K. Shenai,
Made-To-Order Power Electronics, IEEE Spectrum,
pp. 50-55, July 2000.  9 R. Neale, Tiny
Switch Offers The Main Plug Integrated Power
Supply, Electronic Engineering, pp. 51-52,
October 1998.  
 
37
References (cont.)
10 B. Lin and H. Lu, Single-Phase Three-Level
Rectifier and Random PWM





Inverter Drives, IEEE Transactions on
Aerospace and Electronic Systems, vol.
35, no. 4, pp. 1334-1343, October 1999. 11 H.
Park, S. Park, J. Park, and C. Kim, A Novel
High-Performance Voltage Regulator for
Single-Phase AC Sources, IEEE Transactions on
Industrial Electronics, vol. 48, no. 3,
pp. 554-562, June 2001. 12 C. Lin and C. Chen,
Single-Wire Current-Share Paralleling of
Current-Mode- Controlled DC Power
Supplies, IEEE Transactions on Industrial
Electronics, vol. 47, no. 4, pp.
780-786, August 2000.  13 B. Lin, Analysis and
Implementation of a Three-Level PWM
Rectifier/Inverter, IEEE Transactions on
Aerospace and Electronic Systems,
vol. 36, no. 3, pp. 948-956, July 2000. 14 J.
Ghijselen, A. Vanden Bossche, and J. Melkebeek,
Dynamic Control of a Fixed Pattern
Rectifier, IEEE Transactions on Power
Electronics, vol. 16, no. 1, pp. 118-124,
January 2001.
38
References (cont.)
15 I. Schmidt, Secure Power Supply System With
Static Power Converters, IEEE 1977
Intl Semiconductor Power Conversion, pp.
222-223, Lake Buena Vista, Florida,
USA, March 1977.  16 K. Ishimatsu, A DC-AC
converter, using A Voltage Educational Type
Switched-Capacitor Transformer, IEEE 13th
Applied Power Electronics Conference,
pp. 603-606, Anaheim, California, USA, February
1998. 17 R. W. Stokes, High Voltage Transistor
Inverters For A.C. Traction Drives, IEEE
1977 IntL Semiconductor Power Conversion, pp.
270-294, Lake Buena Vista, Florida, USA,
March 1977. 18 N. Mohan, T. Undeland, and W.
Robbins, Power Electronics, Hemilton Printing
Company, New York, New York, USA.
1995.  19 K. Ross, V68HC912B32 PWM
Module,http//www.seattlerobotics.org/
encoder/apr98/68hc12pwm.html, Encoder, The
Newsletter of the Seattle Robotics
Society, Seattle, Washington, USA, April 1998.
20 Frequency Converter Overview,
http//www.majorpower.com/frequency/
overview.html, Majorpower.com, Champlain, New
York, USA.