1. 1 Electrical Systems Overview Presented by Jasper Nance

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

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

4. 4 System Overview Transmission Reception and Storage Use

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

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

7. 7 Utilization 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 DC Motor 12 / 24 / 36V Powers climb

8. 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. 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 Laser radiation considerably more expensive less focusing hardware needed Better for longer distances 4500W “Sky Tracker” lamp 2000W Diode Laser Array

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

11. 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!