AMPS: ANTENNA MOTOR POWER SYSTEM B

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AMPS ANTENNA MOTOR POWER SYSTEM - B

• Group 45
• Babatunde Costa
• ECE 445 Senior Design
• April 25, 2007

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INTRODUCTION

• AMPS provides 2 distinct voltages and currents to
  the motor system of an antenna
• Combines 3 fundamental circuit types to form a
  circuitry designed to meet specifications

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FEATURES

• AC DC voltage conversion
• DC DC voltage conversion
• Constant power supply to both azimuth and
  elevation motor

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SYSTEM OVERVIEW

• Complete Circuitry System
• Full Wave Bridge Rectifier
• Smoother / Filterer
• Buck DC DC converter
• Radar System Motor Azimuth
• Radar System Motor Elevation

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SYSTEM OVERVIEW
Azimuth Motor
Smoother
DC - DC
Power Supply
Rectifier
Elevation Motor
DC - DC
Smoother
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OVERVIEW OF BASIC CIRCUIT TYPES

• Rectifier
• Rectifies the AC voltage from a typical wall
  outlet (120 V, 60 Hz)
• Smoother
• Filters the output waves of the rectifier to a
  DC voltage
• Buck DC DC Converter
• Converts the DC voltage after filtration to a
  lower DC voltage

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COMPLETE CIRCUITRY (SCHEMATIC)
0.7V
0.7V
70 uH
0.3 A
Freq 10MHz
120 V, 60 Hz (rms)

333O
0.7V
100 V
100uF
375pF
-
0.7 V
0.7 V
115 uH
0.15 A
Freq 10MHz

333O
375pF
50 V
-
50uF
0.7V
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TESTING PROCEDURES

• PSPICE SIMULATION
• Simulated the circuitry so that output voltages
  after the following processes can be viewed
  graphically
• Rectification
• Filtration
• DC DC conversion
• Simulated the circuitry within distinct time
  domains

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INPUT AC VOLTAGE169.7 V (Peak) , 120 V (rms),
60 Hz
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AC VOLTAGE FITRATIONTime Range 0 0.1 sec
(Low scale)
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FINAL OUTPUT VOLTAGETime Range 0 1 sec (low
scale)
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SIMULATION RESULTS

• Able to rectify AC voltage (120 Vrms, 60Hz) with
  very low voltage loss
• Converted high AC voltage ( 167 V peak ) to
  high DC voltage (145 V 167 V) with low ripple
  effect (13.17 )
• Converted high DC voltage to a lower DC voltage
  ( 92 104 V )
• Results are within tolerance level (8 max lt 15 )

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SYSTEM ADVANTAGES

• Enables both motors to receive full power from a
  typical wall outlet
• Keeps power supply within an comfortable and
  stable range due its good tolerance level
• Constant high voltage supply

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SYSTEM DISADVANTAGES

• Output DC voltage cannot vary and cannot exceed
  167 V
• Output voltage can only be in DC form (no AC)
• Incompatible with any other device since its
  specially designed for the antenna motors

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SUCCESS AND CHALLENGES

• Derivation of the capacitance needed for
  filtration
• Construction of the switch needed in the buck DC
  DC converter
• Change in frequencies for both filtration and DC
  DC conversion
• Derivation of the component values needed in the
  DC DC converter
• Necessity of a DC DC converter due to the
  invalidity of the voltage divider rule

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CONCLUSION

• Overall, this was a nice, interesting, and
  challenging project for me for its mostly
  related to power electronics which I have no
  experience on
• Anyway, I was able to achieve the desirable
  results and I have enhanced my understanding,
  experience, and practical skills in the
  electrical engineering field of power and energy

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CREDITS

• UIUC ECE Department
• Professor Philip T Krein
• TA Bob Schoonover

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THANK YOU
A M P S