EMR’17
University Lille 1
June 2017
Summer School EMR’17
“Energetic Macroscopic Representation”
« EMR of a Supply System for Medical
Application »
Prof. Philippe BARRADE
HES-SO Valais/Wallis, Switzerland
University of Applied Sciences Western Switzerland
EMR’17, University Lille 1, June 20172
« EMR of a Supply System… »
- Outline -
1. Introduction
2. EMR for the identification of sizing criteria
• Maximal conversion structure
• EMR and IBC
• From strategy to design criteria
3. From the functionality to the design
• Conventional design
• Function identification
• From the function to the structure
4. Conclusion
EMR’17
University Lille 1
June 2017
Summer School EMR’17
“Energetic Macroscopic Representation”
« Introduction »
EMR’17, University Lille 1, June 20174
« EMR of a Supply System… »
- General context -
• Design the supply of a system for radiography (X-rays radiography)
Supply
Systems
VSI
+
Xray tube
(+ heating system)
Teleoptics
+
Imaging Detector
Auxiliaries
+
Computers & Monitors
Low Voltage
Single Phase
AC grid
Low Voltage
DC (Batts./PVs)
EMR’17, University Lille 1, June 20175
« EMR of a Supply System… »
- Requirements and Constraints -
• Main requirements
– Low Voltage AC grid (230V@50Hz): max 500W, complies with standard EMC
requirements
– Low Voltage DC (12V-48V): max 500W, galvanic insulation
– X-ray system:
• 75 constant heating process
• Up to 2kW for pre-heating process plus anod start-up (3sec)
• Up to 30kW for X-ray generation – from 0.5sec up to 1 sec
– Auxiliaries: fed by DC voltage (24V), up to 250W
• Constraints
– Developed for Africa (costs, reliability, maintenance free/easy)
– Must include energy storage (power and energy buffer)
EMR’17, University Lille 1, June 20176
« EMR of a Supply System… »
- Developments -
• First system: AC grid is weak
– « Full options » solution
• Integration of batteries and supercaps
• All the needs must be assumed by the Supply System to be designed
• Second System: AC grid is stable
– « low cost solution »
• Integration of supercaps only
• The Supply System will cover only the needs for the X-ray tube
EMR’17
University Lille 1
June 2017
Summer School EMR’17
“Energetic Macroscopic Representation”
« EMR for the identification of sizing
criteria »
EMR’17, University Lille 1, June 20178
« EMR of a Supply System… »
- Maximal Conversion Structure (1) -
• For the « Full options » solution
– Which kind of conversion structure?
– Where can the battery and the supercapacitors be inserted?
• Activity on the system structure level
– How to be sure to not forget a solution or a possibility
• Maximal Conversion Structure (in a macroscopic approach)
EMR’17, University Lille 1, June 20179
« EMR of a Supply System… »
- Maximal Conversion Structure (2) -
AC
DC
230V/110V
50/60Hz
AC
DC
DC
AC
DC
DC AC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
AC
DC bus
AC
DC
DC
AC
X-rays
DC
DC
DC
AC
230V/110V
50/60Hz
DC
AC
230V/110V
50/60Hz
230V/110V
50/60Hz
DC
DC
Aux 2
DC
AC
Aux 1
EMR’17, University Lille 1, June 201710
« EMR of a Supply System… »
- Maximal Conversion Structure (3) -
• After simplifications….
– Conversion system is still presented through the functions to be implemented
EMR’17, University Lille 1, June 201711
« EMR of a Supply System… »
- EMR and IBC (1) -
• If the functions to be implemented are identified
– Use of EMR and IBC to identify Voltage/Current, Power/energy constraints
EMR’17, University Lille 1, June 201712
« EMR of a Supply System… »
- EMR and IBC (2) -
• Thanks to the implementation of different strategies
– Various scenarios are evaluated, constraints are identified
• Used to size the battery and the supercapacitors
EMR’17
University Lille 1
June 2017
Summer School EMR’17
“Energetic Macroscopic Representation”
« From the functionality to the design »
EMR’17, University Lille 1, June 201714
« EMR of a Supply System… »
- Conventional design -
ur
ir
Redr. Buck
C
L,rBoost
Cscap
IL
d1 d2
ULU1 U2
Iscap
Uscap
• For the « low cost solution » solution
– Supercapacitors charger
– Max Power 500W, Power Factor Correction
• Let’s the « Power Electronicians » play!
*
*
+
-
ControlerIscap_ref
PFC IL_mes
d1=d2
EMR’17, University Lille 1, June 201715
« EMR of a Supply System… »
- Function identification -
Cscap
Iscap
Uscap
Ls
U3
Iscap
Uc
Ic2
C
Ic1
Uc
d1
IL
U2
L
U1
IL
ur
d2
Iscap_refU3_ref
Uc_refIc1_ref
U2_ref
IL_ref
Cscap
Iscap
Uscap
Ls
U3
Iscap
Uc
Ic2
C
Ic1
Uc
fm
ir
U2
L
ur
ur
ir
d2
Iscap_refU3_ref
Uc_refIc1_ref
U2_ref
IL_ref
• Merge of EMR methodology and design rules in Power Electronics
ur
ir
EMR’17, University Lille 1, June 201716
« EMR of a Supply System… »
- From the function to the structure (1) -
ur
ir
Redr. BuckL,r Boost
Cscap
IL
d2d1
U1 U2
Iscap
UscapC
Ic1 Ic1Ls,rs
U3
Cscap
Iscap
Uscap
Ls
U3
Iscap
Uc
Ic2
C
Ic1
Uc
d1
IL
U2
L
U1
IL
ur
ur
ir
d2
Iscap_refU3_ref
Uc_refIc1_ref
U2_ref
IL_ref
• Convert EMR into structural representation
EMR’17, University Lille 1, June 201717
« EMR of a Supply System… »
- From the function to the structure (2) -
• Structure actually under development
EMR’17
University Lille 1
June 2017
Summer School EMR’17
“Energetic Macroscopic Representation”
« Conclusion »
EMR’17
University Lille 1
June 2017
Summer School EMR’17
“Energetic Macroscopic Representation”
« Conclusion »
EMR has been used to test various scenarios
Aiming at size various storage elements
EMR has been used to identify a conversion structure
From the function to the conversion structure
Association rules have been used
Enable keeping physical causality in conflict of association,
Linked with design rules in power electronics
EMR’17, University Lille 1, June 201720
« EMR of a Supply System… »
- Title of the slide -
Prof. P. Barrade
Institute for Systems Engineering
University of Applied Sciences Western Switzerland
PhD in Electrical Engineering at University of Toulouse (1997)
Research topics: Power Electronics, Energy Storage, HIL Simulation, Hybrid Systems