Power Electronics CAD: from space applications to industrial applications P.G. Maranesi, M. Riva Electronic Section – Department of Physics University.

Power Electronics CAD: Power Electronics CAD: from space applications to from space applications to industrial applicationsindustrial applications

P.G. Maranesi, M. RivaP.G. Maranesi, M. RivaElectronic Section – Department of Physics Electronic Section – Department of Physics University of MilanUniversity of MilanVia Celoria 16, 20133 MilanoVia Celoria 16, 20133 MilanoItalyItaly

Congresso del Dipartimento di Fisica Highlights in Physics 2005

Power Electronics CAD: space and industrial applicationsPower Electronics CAD: space and industrial applications 22

SummarySummary

Space applications often dragged power Space applications often dragged power electronics in other fieldselectronics in other fields

Still the aerospace stimulates innovationStill the aerospace stimulates innovation The case of FREDOMSIMThe case of FREDOMSIM for Computer for Computer

Aided Analysis and Design of SPS for Aided Analysis and Design of SPS for satellites is dealt with here: satellites is dealt with here:

_ The Global Star example_ The Global Star example

_ Dynamic Models of ISS DC/DC Converters_ Dynamic Models of ISS DC/DC Converters Technical fall-outTechnical fall-out


a) Characterization of the Power Cell in the Frequency Domain

b) Assignment of Inner Feedback and Feed Forward compensations

c) Assignment of the External Feedback Networkd) Closed Loop Characterizatione) Connection with Other Circuit Blocks and System

Characterization

Dynamic Characterization and Dynamic Characterization and Control Optimization of the Control Optimization of the PWM DC-DC ConvertersPWM DC-DC Converters


Dynamic Description in the Dynamic Description in the State Space Discrete TimeState Space Discrete Time

)()(])1[( kTuBkTxATkx

)()()( kTuDkTxCkTy

)()()( zUBzXAzXz

)()()( zUDzXCzY

)()()( 1 zUDBAzICzY

Z-transform

DBAIeCeH TjTj 1)()( Tjez


Discrete time model Discrete time model automatic build upautomatic build up

kT

Tk

dT

kT)1(

)(1

)( xx

kT

Tk

dT

kT)1(

)(1

)( yyAVERAGING

A, B, C, D Matrices Computation

kTkTkT

kTkTTk

uDxCy

uBxAx

)(

)1(

kTTk ii xAx ])1[(

kTkT ii xCy

kTTk hh uBx 1

kTkT hh uDy

)(tx

)(ty





Characterization



kTkTkT

kTkTTk

uGIDxDFCy

uGIBxBFAx 1

F inner feedback matrixG feed-forward matrix

GIDBGBBFAIDFCH 1)( zz

Inner feedback and Inner feedback and feed-forward compensationsfeed-forward compensations





Characterization



Power Distribution on the Power Distribution on the ISSISS


S4,5 ON S3,6 ON S4,5 ONS3,6 ON

S1 ON S2 ONS2 ON S1 ON

1t t2 t 3 t4 t5t 6 t7

T/2 T/2

TT

0

-IL0

IL0 IL

0t t8

=IT1

)T - T

(T

T

L

V= P

in

22

2

0

Vin

Llk

S6

S5

S4

T1

i

S3

L+

-

T2Co

Vo load

T3

S2

S1

0 T

4_ T

2_

Po

8 L____V Tin

2

P =o,max

V = n Vin o

T4

T2

- _ - _

switch commands and the inductor current waveform

During the short delay between the ON-OFF and OFF-ON commutations, resonant transitions occur involving inductor L and MOSFET parasitic capacitors.

Full Bridge Push-Pull PS


Full Bridge Phase Shifted Full Bridge Phase Shifted

L

S1

S2

S4Vin

T1

T2

i

Vs

S3

D3

Lo

Co Vo loadL

R


This tool has been used This tool has been used profitably elsewhere profitably elsewhere

Hybrid switching power supplies designHybrid switching power supplies design Large bandwidth HV generators for high Large bandwidth HV generators for high

resolution CRTsresolution CRTs Impedance characterization of inverter Impedance characterization of inverter

fed induction motorsfed induction motors Dynamic stability forecasts of power Dynamic stability forecasts of power

distribution systemsdistribution systems


A fall out example:A fall out example:The distributed power supply systemThe distributed power supply system

Intermediate Bus Architecture (IBA)

Front End

48VAC

Card cage #3

Card cage #2

Card cage #1 48V

Card #3

POLPOLniPOL Converter



Isolated Bus Converter

Card #2





Card #1





12V“Intermediate Bus Converter (IBC)”

Or“Bus Converter (BC)”


The converter for the distributed power The converter for the distributed power supply systems:supply systems:

Suddivisione della tensione in ingressoSuddivisione della tensione in ingresso Minori perdite di conduzioneMinori perdite di conduzione Minor rapporto spireMinor rapporto spire Possibile di utilizzo di trasformatori planariPossibile di utilizzo di trasformatori planari

Switch in Line Converter (SILC)Switch in Line Converter (SILC)


ConclusionsConclusions

The development of FDS was stimulated by The development of FDS was stimulated by space application exigenciesspace application exigencies

It provides a fast and accurate description of the It provides a fast and accurate description of the the dynamics and it helps the design the dynamics and it helps the design optimizationoptimization

It opens up the possibility of worst case It opens up the possibility of worst case analyses of the dynamic performancesanalyses of the dynamic performances

It can be profitably employed also in industrial It can be profitably employed also in industrial applicationsapplications

Power Electronics CAD: Power Electronics CAD: from space applications to from space applications to industrial applicationsindustrial applications

P.G. Maranesi, M. RivaP.G. Maranesi, M. RivaElectronic Section – Department of Physics Electronic Section – Department of Physics University of MilanUniversity of MilanVia Celoria 16, 20133 MilanoVia Celoria 16, 20133 MilanoItalyItaly

Congresso del Dipartimento di Fisica Highlights in Physics 2005

Power Electronics CAD: from space applications to industrial applications P.G. Maranesi, M. Riva Electronic Section – Department of Physics University.

Documents

power electronics cad

industrial applications

power cell

fields space applications

summary space applications

bus converter bc slide

power supplies design

iss slide