UI_design_for_321- lecture 2

UI_design_for_321- lecture 2 - Spring 2008 ECE321 12...

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Crude Design of UI Core Inductor S.D. Sudhoff Spring 2008
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Spring 2008 ECE321 2 Let’s Design a UI Core Inductor Node 1 Node 3 Node 5 Node 4 Node 8 Node 7 Node 2 Node 6 Depth into page = d g s d s w w w w w N Turns
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Spring 2008 ECE321 3 Design Requirements • Current Level: 40 A • Inductance: 5 mH • Packing Factor: 0.7 • Slot Shape η dw : 1 • Maximum Resistance: 0.1 Ω
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Spring 2008 ECE321 4 Information • Cost of Ferrite: 230 k$/m 3 • Density of Ferrite: 4740 Kg/m 3 • Saturation Flux Density: 0.5 T • Cost of Copper: 556 $/m 3 • Density of Copper: 8960 Kg/m 3 • Resistivity of Copper: 1.7e-8 Ω m
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Spring 2008 ECE321 5 Step 1: Design Variables
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Spring 2008 ECE321 6 Step 2: Design Constraints
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Spring 2008 ECE321 7 Step 2: Design Constraints • Constraint 1: Flux Density
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Spring 2008 ECE321 8 Step 2: Design Constraints • Constraint 2: Inductance
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Spring 2008 ECE321 9 Step 2: Design Constraints • Constraint 3: Slot Shape
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Spring 2008 ECE321 10 Step 2: Design Constraints • Constraint 4: Packing Factor
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Spring 2008 ECE321 11 Step 2: Design Constraints • Constraint 5: Resitance
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Unformatted text preview: Spring 2008 ECE321 12 Approach (1/4) Spring 2008 ECE321 13 Approach (2/4) Spring 2008 ECE321 14 Approach (3/4) Spring 2008 ECE321 15 Approach (4/4) Spring 2008 ECE321 16 Design Metrics Magnetic Material Volume Spring 2008 ECE321 17 Design Metrics Wire Volume Spring 2008 ECE321 18 Design Metrics Circumscribing Box Spring 2008 ECE321 19 Design Metrics Material Cost M a s s Spring 2008 ECE321 20 Magnetic Material Volume Spring 2008 ECE321 21 Copper Volume Spring 2008 ECE321 22 Circumscribing Box Volume Spring 2008 ECE321 23 Material Cost Spring 2008 ECE321 24 Mass Spring 2008 ECE321 25 Least Cost Design N = 313 Turns d = 6.8143 cm g = 15.7331 mm w = 1.8754 cm aw = 20.589 (mm)^2 ds = 6.7846 cm ws = 13.5693 cm Vmm = 0.00061609 m^3 Vcu = 0.0024936 m^3 Vbx = 0.0066702 m^3 Cost = 143.0882 $ Mass = 25.2628 Kg Spring 2008 ECE321 26 Design Criticisms...
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UI_design_for_321- lecture 2 - Spring 2008 ECE321 12...

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