Transcript applications

Aerospower
Laboratory
Managed by:
Luigi Schirone
professor of Electronics
PROJECTS IN THE FIELDS:
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SPACE
MILITARY
TEST EQUIPMENT
AUTOMOTIVE
APPLICATIONS:
SPACE
Electrical Power Supplies for space vehicles
- PCDU design
- design of photovoltaic generator
- design of battey system
- assembling and testing of flight units
Micro-nano satellite:
• ALMASat
• TIGRISat
AMALIA Lunar Mission:
• AROV
APPLICATIONS: SPACE
EPS for space
Power Conversion Distribution Unit board :
- R=99.9% according to MIL-STD-217F
- patented MPPT in I/F with solar array
APPLICATIONS: SPACE
The AROV
Power Conversion and Distribution Unit
Battery and bus management: approach #1
TRADITIONAL
APPROACH
A classical sun regulated bus.
Each battery is an 8S array
of Li-Ion 18650 cells.
Manufacturer: ABSL
Each APR indipendently supply
both the Main Bus
and an auxiliary bus for BCR's
(Picture from the ABSL WEB site)
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Battery and bus management: approach #2
SINGLE-CELL BATTERY
A regulated bus.
Each battery consists of
a single High-Capacity Li-Ion cell
(1S1P)
The idea after observing that the
required capacity  VES cells by SAFT
(Picture from SAFT WEB site)
The challenge:
• high voltage ratio
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APPLICATIONS:
MILITARY
Tri-phase inverter 400Hz, 27Vdc/36Vac with digital controller on CPLD
(Flight unit for Rotary-Wing produced in Eastern Europe)
Activities
- design
- prototypes for acceptation & flight tests
- pre-series
APPLICATIONS:
TEST EQUIPMENT
Automatic test-bench for solar cell characterisation
client: European Space Agency – ESTEC – Solar Generator Section
APPLICATIONS:
AUTOMOTIVE
 Wireless charging
 Hybrid power sources
APPLICATIONS: AUTOMOTIVE
Wireless charging
Coils for 1kW wireless transmission
Work recently started
APPLICATION: AUTOMOTIVE
HYBRID POWER SOURCES
Configuration of the investigated system:
Preliminary tests for dc-link < 150V
The available source: Maxwell, 48V, 130 Arms, 168F, 6.3mOhm
STUDENT PROJECTS
AUTOMATIC SUN TRACKING
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Photovoltaic system for polar mission
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Minimize surface of solar panel
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Selection of the best angle of inclination
Tether propulsion
Attitude
control via
modulation
of electric
power
R&D
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High-efficiency switching converters
Wireless power transfer
Low-THD sinewave generators
Photovoltaic power conditioning
High efficiency dc-dc converters
• Best efficiency > 98%
• Accurate loss model
• Max voltage gain > 20x
Dynamic control of Dead-time
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a
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(
b
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Low – THD sinewave generators
Performance of our 400Hz inverter