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Thermopix Inc. Smart Stove Cooktop. Phoebe 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.
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Thermopix Inc. Smart Stove Cooktop Phoebe Liu, Andrew Lin, Claire Wu, Hao Su April 17, 2009
Content • Background and Innovation • System Overview and High Level System Design • Business Analysis • Timeline • What was learnt • Future Work • Conclusion • References • Questions
saucepan cooktop induction coils 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 doesinduction work?
Motivation Benefitsof 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
Motivation A Scenario
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 Design • Business Analysis • Timeline • What was learnt • Future Work • Conclusion • References • Questions
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: • Temperaturesensing – two 8-to-1 analogmux • Pan detection – digital mux • Power On and Off – analogmux • LED output – shift registers
Control Processing Module general processing algorithm
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 Cooktopof induction stove 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
Casing & Physical Design 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 Analysis • Timeline • What was learned • Future Work • Conclusion • References • Questions
Business Analysis MarketPotential • Targeting European and Asian Market • 1170 thousands units in production in Europe for 2008 [1] • Energy Saving • Environment-friendly cooking • Clean cooking
Business Analysis CostComparison
Business Analysis CostComparison • 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 Analysis CurrentCompetition
Content • Background and Innovation • System Overview and High Level System Design • Business Analysis • Timeline • What was learned • Future Work • Conclusion • References • Questions
Timeline Schedule of First Phase Development
Content • Background and Innovation • System Overview and High Level System Design • Business Analysis • Timeline • What 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 Work • Conclusion • References • Questions
Content • Background and Innovation • System Overview and High Level System Design • Business Analysis • Timeline • What was learned • Future Work • Conclusion • References • Questions
Conclusion • Be careful and have fun!
Conclusion • Movie time!
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 Overallsystem implemtation