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