ethos immersion to auroville india 2015 - ieee presentation
TRANSCRIPT
ETHOS Immersion to Auroville, India 2015GEORGE KEMPER
What is ETHOS?•Engineers in Technical Humanitarian Opportunities for Service learning
•You learn to use your engineering skills for humanitarian purposes, serving others with practical engineering knowledge.
•You learn about the world, different cultures and yourself.
Minvayu•Minvayu is an NGO based out of Auroville, India that builds small scale wind turbines to meet the needs of rural villages in India.
Senior Design Project• Redesign the stator so it
produces at least 2.7kW at 440V.
• The old design produced upto 1.5kW systems operating at 24V or 48V.
Theoretical Results
The Results
Buck Converter•The Problem: An inexpensive Voltage Controller was needed to stepdown the output voltage of the wind turbine down to 13V.
How a Buck Converter Works •The input and output voltage is monitored using a micro controller.
•The micro controller adjust the duty cycle based on the output voltage to get an output voltage close to the desired output.
•The voltage and current stay pretty constant because the capacitor and inductor minimize the switching losses.
•An appropriately sized filter inductor and capacitor keep the voltage and current ripple to a minimum.
Specifications for Buck Converter
Minimum Maximum
Power (W) - 500 W
Input Voltage (V) 10 500 V
Output Voltage (V) - 13
Output Current (A) - 38.46
Vin_DC
500 V
VCC
20V
R1
1kΩ
C1
330µF
U2
auirgp50b60pd1
U4
AUIRS2123
1Vcc
2IN
3Com
4RST- 5NC
6Vs
7HO
8Vs
ST
TH
20
0L
06T
V1
v2K1
K2
A1
A2
U5
TI_launchpad_c2000
12345678910
11121314151617181920
21222324252627282930
31323334353637383940
ACS750
1 2 3
45
U8
ACS750
1 2 3
45
R2
1kΩ
R3
150kΩ
D1
D21N
4372
A
C2
.1µF
C3
.1µF
R4
1kΩ
C4
.1µF
L1
25.5µH
C5
680µF
R5
1kΩR6
1kΩ
R7
100kΩ
D31N
4372
A
C6
.1µFVSS
5V
GND
VSS
5V
GND
The Design
Tilting up a wind turbine tower
My Travels
My Current Job•PV Quality Engineer
•I got the Job because my experience with power electronics and renewable energy.
