Smart Stove CooktopPhoebe Liu, Andrew Lin, Claire Wu, Hao Su

April 17, 2009

Team Members

Content• Background and Innovation• System Overview and High Level System Design• Business Analysis• Timeline• What was learnt• Future Work• Conclusion• References• Questions

Background

• An induction cooktop holds a series of burners called induction coils (based on magnetic principles)

• These coils generate magnetic fields that induct a warming reaction in steel and iron-based pots and pans

How does induction induction work?

cooktop

induction coils

saucepan

MotivationBenefits Benefits of induction stove

safer: there are no open flames and the surface remains cool

to the touch

quicker: heating and adjustments are immediate, saving you up to 50% of the cooking time when compared to more traditional methods

even heating: hot spots and rings are avoided because the bottom of your cookware heats uniformly

easy cleaning: the surface is flat and smooth; spills and overflows do not stick to the cooktop, so they can easily be wiped away

MotivationA ScenarioScenario

Innovation

• Completely automate your cooking experience

• Can fit any size of shape and pan

• Even more energy efficient

Content

• Background and Innovation• System Overview and High Level System DesignSystem Overview and High Level System Design• Business Analysis• Timeline• What was learnt• Future Work• Conclusion• References• Questions

System Overview

Power Generation Module

• Consists of IGBT and diodes in parallel• Executes high frequency switching with the voltage and

current remaining at zero• Composed of resonant inductance and resonant capacitance• Quasi-resonant converter

Control Processing Module

• Uses PIC18F4520 – PWM, ADC features• Modules Include:

• Temperature sensing – two 8-to-1 analog mux• Pan detection – digital mux• Power On and Off – analog mux• LED output – shift registers

Control Processing Modulegeneral processing algorithmalgorithm

Output Conversion Module/UI

• Arrays of LED depending on the number of coils in use• Temperature Adjustment Module

• 4 different temperature levels: 0, 250F, 300F, 350F

Casing & Physical Design

Proposed Material Actual Material• Heat resistance painted

wood• Pros:

– Does not scratch easily– Cheap - $5

• Cons:– Not as heat resistant– Harder to clean

• Ceremic Glass• Pros:

– High thermal shock rating– Easy to clean

• Cons:– If broken glass shatters into

large fragments– Scratches easily– Expensive - $419. 54

Cooktop Cooktop of induction stove

Casing & Physical DesignCasing Casing induction stove

• Needs to provide enough ventaliation for heat• Coils mounted and isolated from power board• Power board are mounted vertically

Content

• Background and Innovation• System Overview and High Level System Design• Business AnalysisBusiness Analysis• Timeline• What was learned• Future Work• Conclusion• References• Questions

Business Analysis

• Targeting European and Asian Market

• 1170 thousands units in production in Europe for 2008 [1]

• Energy Saving• Environment-friendly cooking• Clean cooking

Market Market Potential

Business AnalysisCostCost Comparison

Part Description R&D Cost Prototype CostInduction heating Elements x 10

$215$62.31

Variable Cap and MOSFET$9.79

$0

Copper Wie 16GA $16.19 $0Microcontroller with EEPROM and Flash $60

$10

IC Chips $476.25 $24.97RJ11 J jack $2 $2Duty and Tax $14.97 $12.63Shipping $277 $250Scew Cap $2.47 $0Paint $7.94 $0.00Wood $35.98 $0.00ICD2 $254.63 $0Ceremic Glass $0.00 $169.97Plastic Casing $0.00 $42.68　 　Total $1,372 $574.56

Business AnalysisCostCost Comparison

• Actual prototype cost is cheaper than our estimated prototype cost

• R&D Financing from ESSEF - $700• Other possible funding include:

– Angel investors– SR&ED credits– IRAP

Business AnalysisCurrent CompetitionCompetition

Maker Model Total Power

Required Ampacity

Cost Dollar/KW

GE PHP900 7.4kW 40A $1395 $189

Kenmore Elite 30 7.4kW 40A $1757.49 $237

LG LCE30845 7.4kW 32A $1679.00 $233

Kitchenaid KICU5088 7.4kW 40A $1749.00 $236

Fagor IFA-80 7.2kW 30A $1799.00 $250

Electrolux E30IC75FSS 7.4kW 40A $1999.00 $270

Viking VICU105 9.0kW 40A $3139.00 $349

Wolf CT30I/S 7.2 kW 40A $2952.00 $410

Thermopix Smart Stove 5.9 kW 27A $574.68 (+ marketing cost)

$97.40

Content

• Background and Innovation• System Overview and High Level System Design• Business Analysis• TimelineTimeline• What was learned• Future Work• Conclusion• References• Questions

TimelineSchedule Schedule of First Phase Development

Teamwork Dynamic

Content

• Background and Innovation• System Overview and High Level System Design• Business Analysis• Timeline• What was learnedWhat was learned• Future Work• Conclusion• References• Questions

What was learned

• Technical Skills– C– PIC features and components implementation– Power distribution and transformer

configuration– Induction heating circuit design

• How to be safe– One of the most dangerous project in ENSC 440

history

Content

• Background and Innovation• System Overview and High Level System Design• Business Analysis• Timeline• What was learned• Future WorkFuture Work• Conclusion• References• Questions

Future Work

Future Work

Content

• Background and Innovation• System Overview and High Level System Design• Business Analysis• Timeline• What was learned• Future Work• ConclusionConclusion• References• Questions

Conclusion

• Be careful and have fun!

Conclusion

• Movie time!

Question?

Acknowledgement

• Patrick Leung• Steve Whitmore• Ash Parameswaran• Fred Heep• Marius Haiducu• Gary Houghton• Gary Schum• Jason Lee• ESSS

References [1] Witcheck appliance. 1971. http://www.witbeckappliance.com/index.asp?

PageAction=VIEWPROD&ProdID=4640[2] H Okatsuka, K Taniguchi, T Kakizawa, Electromagnetic Induction heating apparatus

capable of heating nonmagnetic cooking vessels, US Patent 4,549,056, 1985[3] Lee, Min Ki, Method and circuit for controlling power level in the electromagnetic

induction cooker, US Patent 5,004,881, 1991[4] Induction Cooktops, Heat from the friction produced by magnetized molecules: A

cool way to cook, NAHB Research Center, 2008. http://www.toolbase.org/Technology-Inventory/Appliances/induction-cooktops

[5] Federal Communication Commission, 2009, <http://www.fcc.gov/>[6] IEC – International electrotechnical Commission, 2009, <http://www.iec.ch/>[7] RoHS, 2009, <http://www.rohs.gov.uk/>[8] Standards – CSA – Making Standards Work for People and Business

<http://www.csa.ca>

References Overall system system implemtation