« EMR of a Supply System for Medical Application · EMR’17, University Lille 1, June 2017 2 « EMR of a Supply System…» - Outline - 1. Introduction 2. EMR for the identification

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



« Introduction »



- 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)



- 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)



- 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



« EMR for the identification of sizing

criteria »



- 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)




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




• After simplifications….

– Conversion system is still presented through the functions to be implemented



- 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 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



« From the functionality to the design »



- 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



- 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



- 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



- From the function to the structure (2) -

• Structure actually under development

EMR’17

University Lille 1

June 2017



« Conclusion »

EMR’17

University Lille 1

June 2017



« 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



- 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

Documents

« EMR of a Supply System for Medical Application · EMR’17, University Lille 1, June 2017 2 « EMR of a Supply System…» - Outline - 1. Introduction 2. EMR for the identification