Download DC-DC Converter for Fuel Cell Applications

Team QuEST
Quiet Energy Systems Technologies

Located in Bayview, Idaho

A division of Naval Surface
Warfare Center Carderock
Division (NSWCCD)
•Diesel Generator
•Battery
•Diesel Generator
•Battery
•Diesel Generator
•Battery

Diesel generator
▪ Noisy
▪ Limited power production

Battery
▪ Limited run time
▪ Long recharge time
Fuel Cell
Electrolyte Fuel Cell
Fuel Cell
Type
Quiet energy production
Temp
Contaminant
[⁰F]
 =====
Electrical
Efficiency
[%]
Proton
Exchange
Membrane
(PEM)
Polymer
Membrane
(Solid)
180
Sulfur,
Carbon Dioxide
35% - 40%
Phosphoric Acid
(PAFC)
Phosphoric Acid
(Liquid)
450
Sulfur,
Carbon Dioxide
35% - 40%
Molten
Carbonate
(MCFC)
Potassium
Lithium
Carbonate
(Liquid)
1200
Sulfur
45% - 55%
Solid Oxide
(SOFC)
Zirconium
Dioxide Ceramic
(Solid)
1800
Sulfur
45% - 60%
Parameter
Specification
Output Voltage
714V ±5%
Current
> 75 A per string
Power
50kW per string
Energy
Conduct 6 high speed runs
Dimensions
Must fit in to existing battery racks (570 cu. ft.)
Fuel Storage
Meet NAVSEA and Idaho State requirements for
fuel and waste streams.
User Interface
Remote means of control, monitoring, and
safety shutdown.

Design power electronics for a fuel cell
integration on board AESD
Research
Research
Computer
Simulated Model
Research
Computer Simulated
Model
Design
Research
Computer Simulated Model
Design
Integrate
Research
Computer Simulated Model
Design
Integrate
Hardware Model
•Diesel Generator
•Battery
Fuel Cell Type
Electrolyte
Cell
Temp
[⁰F]
Cell Contaminant
Electrical Efficiency
[%]
Proton Exchange
Membrane
(PEM)
Polymer Membrane
(Solid)
180
Sulfur,
Carbon Dioxide
35% - 40%
Phosphoric Acid
(PAFC)
Phosphoric Acid
(Liquid)
450
Sulfur,
Carbon Dioxide
35% - 40%
Molten Carbonate
(MCFC)
Potassium Lithium
Carbonate
(Liquid)
1200
Sulfur
45% - 55%
Solid Oxide
(SOFC)
Zirconium Dioxide
Ceramic (Solid)
1800
Sulfur
45% - 60%
GROSS POWER
Performance
NEED 600kW
130 kW
DC Voltage
440 – 800 V
Maximum Current
325 A
•Currently used in transportation
•19.6 cu. ft per module
•770lbs per module
•149ºF nominal operating temp
Variable DC
Source
Bridge
Rectifier
26kHz H-bridge
LC Filter
Rim Jet
Proprietary
H-bridge –
(Motor Drive)
H-bridge Output
1000
[V]
750
500
250
0
-250
-500
-750
-1000
10.0
10.2
(file AESDFINAL4.pl4; x-var t) v:TX0001-NLVS
10.4
10.6
10.8
[ms]
11.0
PWM Gate Signal
DC Output
DC Output
PWM
Mosfet Driver
Lo Side Mosfet
Hi Side Mosfet
26kHz
Transformer 1:2
Bridge Rectifier
Voltage Dividing
Feedback
Simulated PWM Output
Simulated H-bridge Output
Actual PWM Output
Actual H-bridge Output
More oscope graphs here once we get them this afternoon
- Established specifications
-Created several computer simulated models
-Pspice
-MATLAB
-ATP/EMTP
-Designed a power electronic converter
-Built a 10:1 DC-DC converter scale model
-71.4VDC nominal
-2kW Maximum
-26.7kHz switching frequency
-Physical model testing/designed feedback
-Detailed report/analysis
-Transient Analysis
-Power supply for DC electronics
-Hydrogen storage/reforming
-Interface/control circuitry
-Physical fuel cell testing
-714VDC power electronic testing
-Detailed cost analysis
SUPPORT
Dr. Herb Hess – University of Idaho
Dr. Brian Johnson – University of Idaho
Dr. Fred Barlow – University of Idaho
James Klein – University of Idaho
John Finley – University of Idaho
Leo Luckose – University of Idaho
Greg Klemesrud – University of Idaho
SPONSORS
Alan Griffitts – NSWCCD-ARD
Karl Sette – NSWCCD-ARD
Frank Jurenka - NSWCCD-ARD