vsd eficienta energetica -...
TRANSCRIPT
![Page 1: VSD Eficienta energetica - valoareimpreuna.rovaloareimpreuna.ro/uploaded/Brasov/Prezentari/8.Eaton_echipamente... · • Actionari electrice SS, VSD ... • Sesiune de discutii libere](https://reader033.vdocuments.net/reader033/viewer/2022042508/5a96d79e7f8b9ab6188cc20f/html5/thumbnails/1.jpg)
© 2009 Eaton Corporation. All rights reserved.
VSD – Eficienta energetica
![Page 2: VSD Eficienta energetica - valoareimpreuna.rovaloareimpreuna.ro/uploaded/Brasov/Prezentari/8.Eaton_echipamente... · • Actionari electrice SS, VSD ... • Sesiune de discutii libere](https://reader033.vdocuments.net/reader033/viewer/2022042508/5a96d79e7f8b9ab6188cc20f/html5/thumbnails/2.jpg)
© 2009 Eaton Corporation. All rights reserved.2
Contact EATON
George Stoica:
• Departament OEM
• Actionari electrice SS, VSD
• Automatizari industriale
• PLC, aplicatii
• [email protected], mob. :+40 725 346 808
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© 2009 Eaton Corporation. All rights reserved.3
Cuprins• Descrierea sistemului, principii de functionare, facilitati
• Economii si eficienta in actionarile cu invertor
• Studiu de caz – actionare pompa
• Actionari speciale
• Costurile si pierderile sistemului
• Sesiune de discutii libere / intrebari si raspunsuri
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© 2009 Eaton Corporation. All rights reserved.4
Actionari cu VSD (convertizor frecventa
Line
VoltageAC/DC
DC Bus
DC/PWM Motor
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© 2009 Eaton Corporation. All rights reserved.5
Actionari cu VSD (convertizor frecventa)
L1
L2
L3
T1
T2
T3
Converter
The converter section
converts the AC line voltage
to a fixed DC voltage.
Precharge
Circuit
The precharge circuit controls the
current inrush that occurs when
the drive is initially energized.
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© 2009 Eaton Corporation. All rights reserved.6
Actionari cu VSD
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© 2009 Eaton Corporation. All rights reserved.7
Actionari cu VSDP
erc
ent Torq
ue /
Perc
ent
Curr
ent
Frequency - Hz
2 10 20 30 40 50 60
600
500
400
300
200
100
0
Current
Torque
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© 2009 Eaton Corporation. All rights reserved.8
Actionari cu VSD (convertizor frecventa
Frequency - Hz
Perc
ent To
rque /
Perc
ent
Curr
ent
2 10 20 30 40 50 60
200
100
0
90%
51
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© 2009 Eaton Corporation. All rights reserved.9
Actionari cu invertor – costuri de instalare si eficienta energetica
Costuri principale de instalare:
- Climatizarea panoului electric
(vezi randament termic)
- Costuri de parametrizare/pif
- Cabluri/pozare pentru indeplinirea normelor
EMC (obligativitate in UE)
- Costuri de mentenanta
Economii la instalare vs alte
sisteme:
- Numar redus componente ( cu mtbf 500,000h)
- Numar redus conductoare/ economii la cablare
- Eficienta in depanare
- Solutie moderna si ergonomica ce ofera
informatii pentru diagnoza proactiva.
- Inlaturarea necesitatii altor echipamente
(compensare energie reactiva, contor
energetic, PLC etc)
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© 2009 Eaton Corporation. All rights reserved.10
Actionari cu invertor – costuri de instalare si eficienta energetica
Costuri principale in functionare vs
alte sisteme similare:
- Randamentul invertorului (75% din total
eficienta)
- Costuri generate de armonici (curenti
eddy/turbionari) (10% din total eficienta)
- Efecte asupra lagarelor prin curenti de scugere
catre pamant (gripare) (5% din total eficienta)
- Posibile efecte generate de rezonanta a
cablului sau du/dt (5% din total eficienta)
- Ventilare suplimentara a motorului in aplicatii
cu turatie redusa (5%)
- Efecte interfatare radio (nec%.)
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© 2009 Eaton Corporation. All rights reserved.
Randamentul invertorului (>96%)
11
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Armonici si compensarea lor
12
Harmonic Content
h5 = 79.5%
h7 = 60.1%
h11 = 18.2%
h13 = 10.0%
h17 = 7.3%
h19 = 6.0%
h23 = 4.1%
h25 = 1.2%
0
20
40
60
80
h5 h7 h11 h13 h17 h19 h23 h25
Harmonic Distribution
Harmonic Content
h5 = 42.5%
h7 = 29.38%
h11 = 6.10%
h13 = 4.06%
h17 = 2.26%
h19 = 1.77%
h23 = 1.12%
h25 = 0.86%
0
10
20
30
40
50
h5 h7 h11 h13 h17 h19 h23 h25
Harmonic Distribution
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© 2009 Eaton Corporation. All rights reserved.13
Transformer Efficiency - 75 kVA Example
0.955
0.96
0.965
0.97
0.975
0.98
0.985
0.99
15 25 35 50 75 100
% Load
Resistive Load
100% Harmonic Load
Armonici si compensarea lor
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© 2009 Eaton Corporation. All rights reserved.14
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s
η =P2
P1
3 2 1
Eficienta energetica a sistemelor cu invertor
Protejarea lantului cinematic de socuri mecanice
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Eficienta energetica a sistemelor cu invertor
Sarcini cu necesar de cuplu constant
Cuplul necesar sarcinii este
constant pe toata plaja de
turatii
Puterea necesar pentru a
opera cu sarcina creste
direct proportional cu turatia
Constant Torque Loads
0
20
40
60
80
100
120
1 2 3 4 5 6 7 8 9 10 11
Speed
To
rqu
e a
nd
Ho
rse
po
we
r
Torque
Horsepower
90% din toate aplicatiile,
altele decat pompe sau
ventilatoare, sunt de tipul CT
Aplicatii comune: instalatii
de ridicat, de transportat
materiale, macarale, prese,
unele extrudere, mixere
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© 2009 Eaton Corporation. All rights reserved.17
Cuplul necesar sarcinii
variaza cu turatia.
Puterea necesara pentru a
opera cu sarcina variaza cu
puterea a 3-a a turatie
Variable Torque Load
0
20
40
60
80
100
120
1 2 3 4 5 6 7 8 9 10 11
Speed
Ho
rse
po
we
r a
nd
To
rqu
e
Torque
Horsepower
Aplicatii comune:
Pompe centrifugale,
ventilatoare, masini cu
volanta etc
Eficienta energetica a sistemelor cu invertor
Sarcini cu necesar de cuplu variabil
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© 2009 Eaton Corporation. All rights reserved.18
Cuplul necesar sarcinii
variaza cu turatia.
Puterea necesara pentru a
opera cu sarcina variaza cu
puterea a 3-a a turatie
Variable Torque Load
0
20
40
60
80
100
120
1 2 3 4 5 6 7 8 9 10 11
Speed
Ho
rse
po
we
r a
nd
To
rqu
e
Torque
Horsepower
Aplicatii comune:
Pompe centrifugale,
ventilatoare, masini cu
volanta etc
Eficienta energetica a sistemelor cu invertor
Sarcini cu necesar de cuplu variabil
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Studiu de caz – Actionare pompa
19
Calculul economiei de energie
vs. reglaj cu electro/vana sau
vs fara reglaj de presiune
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Descrierea sistemului – Aplicatii speciale
• Sistemul are la baza separarea
redresorului (front end) de invertor
• Modulele se pot cupla in paralel pe o
linie de curent continuu
• Puterea magistralei de curent continuu
se poate modifica prin introducere /
eliminarea de unitati redresoare
• Numarul de invertoare este variabil.
• Functie de tipul dispozitivelor front end
se pot genera diferite configuratii.
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Descrierea sistemului – aplicatii speciale
Flexibilitatea sistemului este data de:
• Numarul variabil de invertoare
• Numar variabil de unitati de franare (Brake chopper unit – BCU)
• Se utilizeaza varianta SPN sau varianta SPA
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Tipuri de unitati front-endCaracteristici
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SPN + SPI:
• Putere absorbita redusa : , putere de franare crescuta pentru scurta durata
• Aplicatii posibile : linii de procesare mari ;
Configuratii posibile (II)
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SPA + SPI:
• Putere absorbita redusa : ;
• Recuperare de energie (injectie in retea) : ;
• Continut redus de armonici ;
• Aplicatii posibile : aproape orice tip de aplicatie; ex. Benzi care coboara material ;
Configuratii posibile (III)