HydroFly: Fuel Cell Group Group Members: -Adam Lint -Chris Cockrell -Dan Hubbard Sponsors:
HydroFly Flywheel
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Transcript of HydroFly Flywheel
Gavin Abo
Nate Stout
Nathan Thomas
HydroFly
Flywheel
Hydrofly
• Two Teams– Flywheel– Fuel Cell
• Adam Lint
• Chris Cockrell
• Daniel Hubbard
Sponsors & Mentors
• Brian Johnson
• Herb Hess
• Satish Samineni
Design Review II:Final Design Review Outline
I. Introduction
II. Objectives
III. Design Functionality
IV. Schedule
V. Budget
VI. Questions
I. Introduction
Why is the project being done?
-To correct short voltage sags (a few seconds) to maintain a stable voltage to critical loads.
Why is this important?
-The shutdown of critical loads due to short voltage sags can be costly.
II. Primary Objective
• Interface a flywheel to the AMPS with the ability to correct for voltage sags occurring on the AMPS. – Implement the design by Satish Samineni
Secondary Objectives
• Spin a flywheel
• Communicate between converters
• Operate each converter with its own PWM
• Provide power to AMPS
• Operation Manual
III. Design Functionality
• Organizational Chart• Block Diagram• Overall Circuit Schematic• Sub Circuit Schematics• Programming• Assembled• Documentation• Specifications
Organizational Chart
Operate a sine–triangle PWM
scheme
Operate a space vector
PWM scheme
Provide power to AMPS
Communicate between
converters
Program the triangle wave
Program the sine wave
look up table
Spin a flywheel
Program the switching
times calculation
Program a Phase locked
loop
Program matrix math
functions
Sag Status
Interface a flywheel to AMPS to correct for voltage sags on the
system
Block Diagram
Circuit Schematic
Series Transformer Diagram
A Phase
B Phase
C Phase
Flywheel Energy Storage System
+ Vinjected -
+ Vinjected -
+ Vinjected -
So
urc
e
Lo
ad
DC link startup power supply
Generates positiveDC voltage
Generates negative DC voltage
D3D1
1 2D2
-
1 2
+
VdcD4
120Vac
-
D3
D2
1 2
Vdc
120VacD1 +
D4
1 2
The Programming
• What we have programmed– Matrix math
capabilities
– Space Vector PWM scheme
– Sag detector and corrector
• What we still have to program– Phase Locked Loop
– Modify already programmed code to work with the measured inputs
Assembled• What has been
assembled– Capacitor shorting bars
– Utility Cart
• What needs assembled– DC link charging
supply
– LEMS
– Safety Cover
– Transformer
Documentation
• Test plan– Functional test plan– Specification test plan
• Operators Manual
• Poster
SpecificationsThe AMPS 3 Phase, 208 V, 60 Hz, 5 kVASeries Transformers 110V/220VDC Bus Voltage 450 V maxDC Bus Capacitance 2 x 250V 1000 μF (grounded between the 2)Flywheel Inertia 0.911 kg-m2
Induction Machine Ratings 208 V, 32.6 A, 60 Hz, 10 hp, 4 poleSVPWM Switching Frequency 1 kHzSPWM Switching Frequency 10.8 kHzMaximum Sag Correction Duration 1.5 sMaximum Magnitude of Sag Correction 37% (or 63% of rated) @ 0.95 per unitSag Correction Response Time Within 2 cycleMagnitude Sag Correction Tolerance Within 0.95pu 0.05pu of rated2 Tier Converters 6 IGBTs 75A, JTAG (software not
included), etc.DSP Program Language C with inline ASM from TISample Rate for Voltage Correction 20k samples per cycleFlywheel Speed Sensor Position EncoderDC power supply max. ripple 50V DC
IV. Schedule
V. Budget
Quantity Item Company Unit Price SubTotal withFreight
2 DC/AC Converter Tier Electronics $1,700 $3,428.041 DSP Software Texas Instruments $495 Donated1 XDS510PP-Plus Parallel Port
EmulatorSpectrum Digital $974.25 Donated
2 1000 F Capacitors 250 V Futurlec $2.5 $81 Craftsman Utility Cart (Mfr.
model #59345)Sears (Lewiston, ID) $62.99 $62.99
1 3-Phase Transformer UI G10 Lab $240 Salvaged10 120V 20A Diodes Digi-Key $1.138 $18.59
Subtotal to Date $3517.62
1 Design Poster/Report Binding UI Commons CopyCenter
$30 $30
6 Voltage Transducer Digi-Key Corporation $37 $2226 Current Sensor Digi-Key Corporation $21 $126
Other $929.381 48 V DC 20 W Power Supply Jameco $10.95
Total Expenditures $4,825
Proposed Budget $4,825
Remaining Budget $0
http://www.ece.uidaho.edu/hydrofly/website
VI. Questions