Smart Ocean Wave Energy Converter ECE 1616A Nana Ahiabli, Andrew - - PowerPoint PPT Presentation
Smart Ocean Wave Energy Converter ECE 1616A Nana Ahiabli, Andrew Budd, John Jacquinet Faculty Advisor: Peng Zhang Graduate Advisor: Taofeek Orekan Overview Recap Generator Improvements 3-Coil system Mechanical changes Circuit Improvements
Nana Ahiabli, Andrew Budd, John Jacquinet Faculty Advisor: Peng Zhang Graduate Advisor: Taofeek Orekan
Recap Generator Improvements
3-Coil system Mechanical changes
Circuit Improvements
Buck-boost hardware Software & Simulations PCB Design Microcontroller
underwater vehicles (AUVs)
Wave Energy Converter System
3-Coil System
Higher power capability
Three 24 AWG copper magnet coils
24 AWG wire rated for 3.5 amps Total of 10.5 amps @ 50V input Maximum power rating of 500 watts
3090 turns per coil
Similar number of turns as previous model Provides similar input voltage of 50V max
Wave Energy Converter System
Buck-boost duty cycle is adjusted by micro to output 13.8V for battery charging Optocoupler necessary for electrical isolation from micro to buck-boost Schottky diodes used in circuit to reduce voltage drop All components are rated for at least 20 amps for high power system
Pseudo Code
error_prior = 0 integral = 0 KP = Proportional gain KI = Integral gain while(1) { error = desired_value – actual_value integral = integral + (error*iteration_time)
bias error_prior = error sleep(iteration_time) }
Power and control circuit
Buck-Boost PI Response to Instantaneous Input Voltage Drop
The input voltage will have an AC component unlike this simulation, and an immediate voltage change is not expected under typical operation.
Green is the input voltage Red is the output Voltage Purple is the error in
2 oz. copperclad board
Higher oz. board allows for narrower traces
CNC milling for traces/holes Contains all components that involve high power applications
Buck-boost converter
PCB Design (Control board) 1 oz. copperclad board CNC milling for traces/vias All low power components
Microcontroller Bluetooth Optocoupler
Wave Energy Converter System
ATMEGA168P Powered via 5V linear regulator ADC
ADC necessary for voltage/current sense
PWM output for buck-boost Serial communication with bluetooth module
HC-05 Bluetooth module for data analysis
Wave Energy Converter System
Sealed Lead-Acid Charge voltage 13.5V- 14.9V 3.5 AH each Total of 14 AH All four batteries fit in 2
compartments available on the
Soldering components onto PCB Power output testing Utilizing test rig for more reliable data Software: Adjust PI controls Android app to view bluetooth data
Estimated Cost per Unit (Control Board)
Part # of Parts Price per Part Total Price ATMEGA168 1 $2.38 $2.38 4N35 Optocoupler 1 $0.33 $0.33 Disconnects 2 $0.06 $0.12 5V Regulator 1 $0.40 $0.40 ISP Headers 2 $0.35 $0.70 HC-05 Bluetooth 1 $9.99 $9.99 6 Pin DIP Socket 1 $0.16 $0.16 28 Pin DIP Socket 1 $0.22 $0.22 Production Cost $27.00 Total Cost per Board: $41.30
Estimated Cost per Unit (Power Board)
Part # of Parts Price per Part Total Price Input Cap 1 $32.12 $32.12 Output Cap 1 $0.20 $0.20 Inductor 1 $11.80 $11.80 Schottky Diode 4 $0.40 $1.60 MOSFET 2 $1.60 $3.20 Pull Down Resistor 1 $0.02 $0.02 Disconnects 4 $0.05 $0.20 Production Cost $27.00 Total Cost per Board: $76.14
Estimated Cost for All Electronics
Component # of Parts Price per Part Total Price Control Board 1 $41.30 $41.30 Power Board 1 $76.14 $76.14 Generator 1 $301.99 $301.99 Batteries 4 $12.35 $49.40 Total Cost for Electronics: $468.83