8/13/2019 Fault Tolerant Switched Reluctance Machine's Comparative Analysis

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Fault Tolerant Switched Reluctance

Machine's Comparative AnalysisM. Ruba and L. Szabó,

Technical University of Cluj,

Department of Electrical Machines,

Cluj, Romania

8/13/2019 Fault Tolerant Switched Reluctance Machine's Comparative Analysis

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Introduction

Fault tolerant concept emerged from IT

More fault tolerant interconnected equipments form a system

Machine design using FLUX 2D

Command system build in Matlab Simulink

Full simulation using FLUX to Simulink Technology

Comparison of the results

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The structures in study

Geometries in study:

12/8 and 12/14 topology

Fault tolerance ability difference

Different flux paths

Full possibility of command

High fault tolerance

Higher manufacture costs

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The power converters in study

6 phases divided in 2 groups

Half H bridge

Separate parallel connected groups Separate firing angles computation

High fault tolerance

V

A1

A2

B1

B2

C1

C2

D1

D2

E1

E2

F1

F2

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The coupled simulation program Inverter simulation:

Cedrat Electriflux Each phase is compound from two coils

Switches modelled with resistances (100kΩ - 4mΩ)

Voltage source

Connection to the buss bars

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The coupled simulation program

Command computation:

Matlab Simulink

Coupling block

Feedback loop

Data storage

torque

teta

curr BA1PL

curr BB1PL

curr BC1PL

curr BD1PL

RA1_1

RA1_2

RA2_1

RA2_2

RB1_1

RB1_2

RB2_1

RB2_2

RC1_1

RC1_2

RC2_1

RC2_2

RD1_1

RD1_2

RD2_1

RD2_2

VOLTAGE 240v

RE1_1

RE1_2

RE2_1

RE2_2

RF1_1

RF1_2

RF2_1

RF2_2

curr BE1PL

curr BF1PL

teta

250

Voltage value

z

1

Torque

mod

Teta

Cur_PH5

Comand C1

Comand C2

F

Teta

Cur_PH4

Comand C1

Comand C2

E

Teta

Cur_PH3

Comand C1

Comand C2

D

Curr E1

Coupling with Flux2d2

Periode

Teta

Cur_PH2

Comand C1

Comand C2

C

Teta

Cur_PH1

Comand C1

Comand C2

B

Teta

Cur_PH6

Comand C1

Comand C2

A

-1

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Results

of simulation 0 0.005 0.01 0.015 0.02

-50

0

50

t [s]

C u r r e n t [ A ]

. . . .

. . . .

0 0.005 0.01 0.015 0.02-100

0

100

t [s]

T o r q u e [ N m ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

C u r r e n t [ A ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

T o r q u e [ N m ]

. . . . . . . . .

.

0 0.005 0.01 0.015 0.02-50

0

50

t [s]

C u r r e n t [ A ]

. . . .

. . . .

0 0.005 0.01 0.015 0.02-100

0

100

t [s]

T o r q u e [ N m ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

C u r r e n t

[ A ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

T o r q u e [ N m ]

. . . . . . . . .

.

0 0.005 0.01 0.015 0.02

-50

0

50

t [s]

C u r r e n t [ A ]

. . . .

. . . .

0 0.005 0.01 0.015 0.02-100

0

100

t [s]

T o r q u e [ N m ]

0 1 2 3 4 5 6 7 8x 10

-3

-50

0

50

t [s]

C u r r e n t [ A ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

T o r q u e [ N m ]

. . . . . . . . .

.

0 0.005 0.01 0.015 0.02-50

0

50

t [s]

C u r r e n t [ A ]

. . . .

. . . .

0 0.005 0.01 0.015 0.02-100

0

100

t [s]

T o r q u e [ N m ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

C u r r e n t [ A ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

T o r q u e [ N m ]

. . . . . . . . .

.

0 0.005 0.01 0.015 0.02-50

0

50

t [s]

C u r r e n t [ A ]

0 0.005 0.01 0.015 0.02

-100

0

100

t [s]

T o r q u e [ N m ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

C u r r e n t [ A ]

0 1 2 3 4 5 6 7 8

x 10-3

-50

0

50

t [s]

T o r q u e [ N m ]

.

Normal operation

One channel fault

One phase fault Two channel fault

Two channel fault

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Results of simulation

Studied cases Mean torques [N·m] and

percentage of the rated torque

12/8

SRMtopology

Healthy case 52.21 (100%) Faulty case 1 49.10 (94.04%) Faulty case 2 35.27 (67.55%) Faulty case 3 46.31 (88.69%) Faulty case 4 33.36 (63.89%)

12/14

SRM

topology

Healthy case 19.93 (100%) Faulty case 1 19.59 (98.29%) Faulty case 2 16.16 (81.03%) Faulty case 3 19.28 (96.71%) Faulty case 4 13.79 (69.19%)

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Conclusions

There are significant differences between the behaviour of the twomachine structures in faulty operation

The 12/14 structure has the advantages of better performance

regarding malfunction and lower losses, but has the disadvantagesof higher manufacture costs

Further researches will concern the fault-tolerance some specialSRM topologyes