Sponsored by NASA AMES Mentors John Porter Armen

Sponsored by: NASA AMES Mentors: John Porter Armen Dibble Team Induct-Us: Anna Camery Kyle Ryan Brady Coyle Brett Russell Dan Mathewson Advisors: Herb Hess David Atkinson Greg Donohoe 2

K-10 Lunar Rover Remote, extraterrestrial, surveillance robot under development at NASA Ames Instruments: • 360°, panoramic, 3 D scanning laser • Ground penetrating radar • Color panoramic camera • High resolution terrain imager 3

Current Power System Ocean Server Battery Management System Smart Li-ion battery packs • 14. 4 V, 6. 6 AHr (24) • Battery management module • Integrates battery stacks • Ocean Server software • Monitors battery status • 4

Current Issues Batteries must be physically removed or plugged in through 3 ports to be charged Physical interaction is not an option ‘off-planet’ Need to find a way to remotely plug in K-10 and charge the batteries 5

Proposed Solution Induction Based Charger: Create a two-part separable transformer, split between the rover and base station • No direct human interaction required to charge rover batteries • 6

How It Works When the electric current alternates in a wire loop a magnetic field is created. • A second wire near the magnetic field will experience and induced electrical charge. • The induced charge will charge the battery without physical contact. • 7

How It Was Done Isolated Power Regulation Power Input AC-DC Converter DC-AC Inverter 60 Hz Transformer Coils AC-DC Converter Ocean Server Boards 100 k. Hz Primary Side Station Secondary Side Rover 8

Modified Board Meanwell SP-320 -15 Specs: • 320 W Power Output • 120 V 60 Hz Input • Fixed switching frequency at 100 KHz • Isolated Power Transfer/ Optocoupler • Protections: Short circuit / Overload / Over voltage 9

Power Regulation An optocoupler is used to send • Using components with similar isolated voltage regulation electrical characteristics the system can information back to primary side of be split in two. transformer. • Existing optocoupler is a single component package. • Secondary Primary 10

Finalized Circuit 11

How It Was Done Mechanical Design 12

Static Arm Base Station Components: • Primary Circuitry • Adjustable Core Heat Sink 13

Inductor Mountings 14

Spring Rover 15

Ramps 16

Final Product 17

Production Cost Sheet Stock Raw Materials $104. 00 Hardware Machining Labor $160. 00 Fabrication Power Supply Electrical Components $180. 00 Cores Wire Total Cost $444. 00 18

Questions? 19