1/14/2016

1

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

1/14/2016

2

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

1/14/2016

3

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

1/14/2016

4

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

1/14/2016

5

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

1/14/2016

6

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

1/14/2016

7

RECTIFIER CIRCUIT

INVERTER CIRCUIT DESIGN

Waveform Generation

Pre-transformer Amplification

Transformer

1/14/2016

8

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

1/14/2016

9

PROPOSED INVERTER 1

PROPOSED INVERTER 1

1/14/2016

10

PROPOSED INVERTER 2

PROPOSED INVERTER 2

1/14/2016

11

DESIGN CHALLENGES

•Balance:

•Frequency

•Voltage

•Current

DESIGN CHALLENGES

•Creation of good sinusoid

waveform

•May need to explore a

alternate method of

waveform generation

1/14/2016

12

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

1/14/2016

13

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