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