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Team Induct-Us:

Anna CameryKyle Ryan

Brady CoyleBrett Russell

Dan Mathewson

Advisors:Herb Hess

David Atkinson

Greg Donohoe

Mentors:John Porter

Armen Dibble

Sponsored by: NASA AMES

K-10 Lunar Rover

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Remote, extraterrestrial, surveillance robot under development at NASA Ames

Instruments:•360°, panoramic, 3D scanning laser•Ground penetrating radar•Color panoramic camera•High resolution terrain imager

Current Power System

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Ocean Server Battery Management System

•Smart Li-ion battery packs•14.4V, 6.6AHr (24)•Battery management module•Integrates battery stacks•Ocean Server software•Monitors battery status

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

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Proposed Solution

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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

How It Works

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• 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.

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Ocean Server Boards

PowerInput

AC-DCConverte

r

DC-ACInverter

AC-DCConverte

r

Isolated Power

Regulation

Primary Side Station

Secondary Side Rover

How It Was Done

60 Hz 100 kHz

Modified Board

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Meanwell SP-320-15Specs:

•320W Power Output •120 V 60Hz Input•Fixed switching frequency at 100KHz•Isolated Power Transfer/ Optocoupler•Protections: Short circuit / Overload / Over voltage

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Power Regulation

• An optocoupler is used to send isolated voltage regulation information back to primary side of transformer.

Secondary Primary

• Using components with similar electrical characteristics the system can be split in two.

•Existing optocoupler is a single component package.

Finalized Circuit

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How It Was Done

Mechanical Design

Static Arm Base Station

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Components:•Primary Circuitry

•Adjustable Core Heat Sink

Inductor Mountings

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Spring

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Rover

Ramps

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Final Product

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Production Cost

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Raw Materials $104.00 Sheet Stock

Hardware

Labor $160.00 MachiningFabrication

Electrical Components $180.00 Power Supply

CoresWire

Total Cost $444.00

Questions?

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