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Dual Burner, Single Valve
Safety Ignition Controller with
Improved Inverter CircuitAnthony Evangelista, Karan Katyal,
John Sarrouh, Trent Schroeder
Faculty Advisor: Dr. Abdul Razaque
Channel ProductsDan J. Szubra
PROBLEM DESCRIPTION
• Ignition controller for
residential and industrial
applications
•Ignites fuel
•Detects/monitors flame
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PROBLEM DESCRIPTION
•Need for more
universal/improved power
supply
•More versatile
•Adaptable to other designs
PROBLEM DESCRIPTION
Goals:
•Design new inverter circuit
• Implement into existing dual
burner circuit
•Detect and monitor flame
presence
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PROBLEM DESCRIPTION
Significance:
•Universalize the inverter
circuit for Channel Products
• Inverter circuit can supply
power to other sub-circuits
DESIGN OBJECTIVES
•Provide AC power for flame
detection/monitoring
•Provide AC power to spark
ignition circuit
• Integrate inverter block with
existing ignition controller
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DESIGN SPECIFICATIONS
•Convert 24 V AC to 9 V DC
•Design new inverter circuit
• Input: 9 V DC
•Output: 350-450 V p-p
•Frequency range: 1kHz-25kHz
•Charge 1.5 µF capacitor in 8 ms
PROPOSED SOLUTION
•Rectifier circuit
•Diode, full-wave bridge
rectifier
•Convert 24 V AC to 9 V DC to
feed inverter
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PROPOSED SOLUTION
• Inverter circuit with
transformer
•Generate sinusoidal waveform
•Amplify before transformer
•Transformer to get to target
voltage
PROPOSED SOLUTION
• Integration of inverter into
existing circuits
•Spark ignition circuit
•Flame detection/rectification
circuit
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RECTIFIER CIRCUIT
•Full-wave diode rectifier
•24 V AC to 9 V DC
•Thyristors impractical
•Output feeds inverter
•Will be omitted in DC-source
applications
RECTIFIER CIRCUIT
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RECTIFIER CIRCUIT
INVERTER CIRCUIT DESIGN
Waveform Generation
Pre-transformer Amplification
Transformer
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INVERTER CIRCUIT DESIGN
• IC 555 used to generate
square wave
•Square wave modified by
passive filtering
INVERTER CIRCUIT DESIGN
•Amplified by push-pull
transistor amplifier
•Fed into transformer to
increase to desired voltage
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PROPOSED INVERTER 1
PROPOSED INVERTER 1
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PROPOSED INVERTER 2
PROPOSED INVERTER 2
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DESIGN CHALLENGES
•Balance:
•Frequency
•Voltage
•Current
DESIGN CHALLENGES
•Creation of good sinusoid
waveform
•May need to explore a
alternate method of
waveform generation
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FINAL DELIVERABLE
•Four Objectives:
1. Provide required voltage
2. Charge capacitor
3. Include AC-to-DC converter
4. Integrate into modified
circuits
FINAL DELIVERABLE
•Provide working prototype of
the controller
•New inverter circuit
•Modified flame rectification
circuit
•Modified spark ignition circuit
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BUDGET
Item Value Quantity Unit Price Total PriceResistor 1k 2 $6.09 $12.18
Capacitor 47uF 1 $3.24 $3.24
Diodes 4 $11.23 $44.92
Capacitor 0.047uF 1 $0.35 $0.35
Capacitor 0.01uF 1 $2.10 $2.10
Resistor 47k 1 $0.18 $0.18
Resistor 8.2k 1 $0.95 $0.95
Capacitor 10nF 4 $0.72 $2.88
Resistor 8k 3 $2.21 $6.63
Resistor 100 1 $0.39 $0.39
MOSFETs 2 $1.67 $3.34
Capacitor 2.2uF 1 $2.78 $2.78
555 IC Chip 1 $0.69 $0.69
Transformer 1:22 1 $127.65 $127.65
TOTAL: $208.28
TIMELINENOV DEC JAN FEB MAR APR
Design AC-DC
Converter
Design Inverter
Order Parts
Build Prototype
Inverter
Test Prototype
Inverter
Modify Circuits -
Design
Modify Circuits -
Prototype
Integrate
Components