P19463: Water Powered USB Charger
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Detailed Design

Table of Contents

Detailed Design Documents

Team Vision for Detailed Design Phase

Our team planned to create a working first prototype of the selected detailed design. This includes selecting a motor that provides sufficient current and voltage, while also at an appropriate weight. A first blade design is tested to better understand how to make efficient blades to turn the desired motor. A set of coupling magnets are purchased and tested. Waterproofing components and designs are tested.

A motor has been selected, DC Servo Motor, to start system integration testing. A set of couplings magnets have been made, because purchasing pre-made magnets was more expensive. This involved a 3D printed disk to house the magnets, and securing the magnets with glue and resign. A component has been purchased that will allow for a waterproof connection at the point where the wires from the motor will exit the housing. Wire with two conductors has also been ordered to connect the motor to the out-of-water USB connection. Housing design for both housings has been started. Blade design 3D modeling has been started.

Progress Report

Accomplished so far: Motor selected Magnets created Underwater housing prototype Overall system design (offshore, and underwater) First prototype of blade printed Electrical schematic

Housing/Waterproofing

Test Plan

Equipment:
Table of the equipment required

Table of the equipment required

Test Setup:The housing will have tissue paper or some type of indicator inside of it. The connection junction box and connecting wires will be assembled to the housing. The assembly will then be placed into a large bucket full of water.

Procedure"

1. Acquire all materials and the assembly described above

2. Fill the bucket with water.

3. Place product into the bucket for roughly 10 minutes

4. Dry the outside of the housing and review the indicating paper in

5. Put assembled test specimen into the water and let it stay there for ~ 1 hours.

Results:

Results are visualized and needs to be recorded with pictures.

Coupling Magnets

3D Models

Other stuff

Blade Design

3D Models

3D Model of Blade Design

3D Model of Blade Design

Printing

Picture of Blade 3D printing

Picture of Blade 3D printing

Motor Selection

USB output specification

USB output specification

DC Motor Selections document
DC Motor Schematic

DC Motor Schematic

DC Motor Testbench(1)

DC Motor Testbench(1)

Motor Options

Motor

Motor

Results

Table

Table

Test Result document
DC Servo Motor RPM VS Power Curve

DC Servo Motor RPM VS Power Curve

Servo vs B&B RPM VS Power Curve

Servo vs B&B RPM VS Power Curve

Electrical System

Applications Specifications

Buck-Boost Data Sheet

Buck-Boost Data Sheet

Buck-Boost Max Current Curve

Buck-Boost Max Current Curve

Schematics

Buck-Boost converter ordered from Adafruit
Buck Boost Converter Schematic(1)

Buck Boost Converter Schematic(1)

Components

Buck Boost Converter(1)

Buck Boost Converter(1)

Bill of Material (BOM)

Current Bill of Materials(1)

Current Bill of Materials(1)

Link to live document of bill of materials.

Risk Assessment

Risk Assessment live document

Design Review Materials

Presentation

Plans for next phase

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