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Electrical Systems Overview

Electrical Systems Overview. Presented by Jasper Nance. Outline. 1. System Overview. 2. Power Transmission. 3. Power Storage. 4. Power Utilization. 5. Some extra details. Design Challenges and Risks. Challenges. Weight Transmission of very large amounts of power

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Electrical Systems Overview

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  1. Electrical Systems Overview Presented by Jasper Nance

  2. Outline 1. System Overview 2. Power Transmission 3. Power Storage 4. Power Utilization 5. Some extra details

  3. Design Challenges and Risks Challenges • Weight • Transmission of very large amounts of power • Expensive of the laser system Risks • Reflected laser radiation poses a hazard • High energy densities pose a fire risk for onboard systems and sensors

  4. System Overview Transmission Power Supply Power Source Beam Source Receptionand Storage 1rst Power Converter Beam Receiver Ultra-capacitor bank Use Control System 2nd Power Converter Motor(s)

  5. Transmission Power Source • Unlimited power from 110V mains provided • ~10KW power supply • Laser supplies more complex Power Supply • 8KW Laser • Guidance system • Safety Cutoff Beam Source

  6. Reception and Storage Beam Receiver • Laser: Solar Cells • Wifi feedback to guidance system • Buck-boost topology • Several KW • Outputs safe voltage level for caps (2.5V, 5V) 1rst Power Converter Ultra-cap bank • Store excess energy while at maximum power transfer • Each cap is 2500 Farads • 7800 joules of energy • Capable of extremely high power

  7. Utilization 2nd Power Converter • Optimized converter for ultra-cap levels • Provides power to the motor at a stable and controllable level • Monitors system for • Speed • Power • End of climb • Descent • Emergency stop signal Control System Motor(s) • DC Motor 12 / 24 / 36V • Powers climb

  8. Research • Since large amounts of energy are required at the receiving end, high efficiency cells must be utilized. • Focusing and Alignment • Wavelength of the photovoltaic cells should match to achieve maximum power transfer. • Designing a photocell array that is both rigid and lightweight. • Converting the electricity into a useable voltage/current. Texas Scribbler

  9. Laser Power Transmission Components • Beam Emitter: • Produces high-intensity, beam of light • Beam must be focused over entire vertical ascension • Ideally spectrum optimized to transducer element 4500W “Sky Tracker” lamp • Laser radiation • considerably more expensive • less focusing hardware needed • Better for longer distances 2000W Diode Laser Array

  10. Ultracapacitors • 2500F 2.5V • 7800 Joules Step5: Charge the ultracapacitors

  11. EE Teams • EE Team 1: Guidance system and wifi feedback • Controlling a tri-axis gimbal mount • Use wifi link to maintain aim • Design around laser pointers • EE Team 2: Power converter design • ~1KW design • Begin with dummy source and provide power to caps, motor • Must be extremely lightweight!

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