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BASCO: Hybid Lawn Mower. Erfan Ahmad Andrew Bauer Derek Forehand. Design Discussion. Design Goals Design Possibilities Pros/Cons. Gantt. Design Goals. Long Battery Life Speed Control Cut Quality. Design Goals (cont’d). Battery Life Improves Marketability Improves Buyer Range
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BASCO: Hybid Lawn Mower Erfan Ahmad Andrew Bauer Derek Forehand
Design Discussion • Design Goals • Design Possibilities • Pros/Cons
Design Goals • Long Battery Life • Speed Control • Cut Quality
Design Goals (cont’d) • Battery Life • Improves Marketability • Improves Buyer Range • Speed Control • Improves Mowing Times • Measure of Power Transmission • Cut Quality • Ultimate Selling Point • Measure of Power Transmission
Design Possibilities Gas vs Electric Engines • Gas Driven/Electric Blades • Electric Driven/Gas Blades • Gas Generator/Electric Engine/Electric Blade
Design 1: Gas Driven/ Electric Blades • Gas motor drives the wheels. • Electric blade spindle motors. Pros • Eliminate Deck Belt • Drivable after Battery Life • Larger Decks Cons • Can’t use blades to recharge • Load on blades is variable
Design 2: Electric Driven/Gas Blades • Electric motor drives the wheels. • Typical deck design off gas engine. Pros • High efficiency gas engine • Power generation • Better run-time Cons • Deck belt • Dead battery = Dead in the water • Cost
Design 3: Gas Generator/Electric Motors • Gas motor drives a generator. • Electric blade spindle motors and drive motor. Pros • Less Maintenance • Efficient gas engine • Smaller gas engine than typical mower Cons • More expensive • Battery Weight • Initial Battery Life
Factors/Conclusions • Other Factors • Total System Weight • Component Costs • Run Time • Final Thoughts • Gas Driven • Electric Driven • Generator