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Technical Training 2008Technical Training 2008
TECHNICAL TRAININGTECHNICAL TRAINING
20082008
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Inverter Mini ChillerInverter Mini Chiller
System and ControlSystem and Control
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1. Introduction1. Introduction
2. Basic Inverter Technolo!2. Basic Inverter Technolo!
". Co#$onents". Co#$onents
%. Control Alorith#%. Control Alorith#
&. 'rotection&. 'rotection
Content
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Introduction
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&AC("0 CR
&AC(&&)*& CR
&AC(100)1"&)210 CR
Introduction
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+odel+odelCa$acit! ,-/Ca$acit! ,-/
CoolinCoolin HeatinHeatin
&AC(0"0CR&AC(0"0CR *.%*.% ..
&AC(0&&CR&AC(0&&CR 1%.&1%.& 1.121.12
&AC(0*&CR&AC(0*&CR 20.&220.&2 21.21.
&AC(100CR&AC(100CR 2*.802*.80 2."02."0
&AC(1"&CR&AC(1"&CR "8.&%"8.&% %1.%*%1.%*
&AC(210CR&AC(210CR &8.2&8.2 1.&&1.&&
Introduction
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Conventional Bac- to Bac- Circuits B'HE
'ri#ar! Circuit 1 'ri#ar! Circuit 2
econdar! Circuit
'ri#ar! Circuit 1 'ri#ar! Circuit 2
&AC( True 3ual Circuits B'HE
New Technology BPHE- True Dual Circuits
Introduction
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Conventional !ste#
Inverter !ste#
Inverter Compressor
Introduction
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The s!ste#45The s!ste#45
Inverter
AC/DC
Rectifiert
u
t
Power supply
Input frequency
50Hz t1
50 Hz100 Hz
15 Hz
DC/AC
Inverter
(compressor motor input)
P!
Basic Inverter Technolo!
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Inverter Basic tructureInverter Basic tructure
Inversion
'LC Control
Recti7ication
AC AC
3C Lin-
Converter
'+ inal
+'
+
Basic Inverter Technolo!
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Recti7ication CircuitRecti7ication Circuit
" E+I 7ilter to #ini#i;e e#ission e77ect ,E+C/ and raise i##unit!E+I 7ilter to #ini#i;e e#ission e77ect ,E+C/ and raise i##unit!level ,E+/level ,E+/" 'TC to cushion start5u$ current to ca$acitor'TC to cushion start5u$ current to ca$acitor" 3iode
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3C tae3C tae
" '=C ca$acitor acts to cur< '= losses caused
ta
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Inversion CircuitInversion Circuit
" Consists o7 IGBT ,Insulated Gate Bi$olar Transistor/Consists o7 IGBT ,Insulated Gate Bi$olar Transistor/" Controllin the 9N)9= lin-aes> di77erent 7re:uenc! and voltae o7 "5Controllin the 9N)9= lin-aes> di77erent 7re:uenc! and voltae o7 "5
$hase AC can
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Ite#Ite# =i?ed $eed AC=i?ed $eed AC Inverter ACInverter AC
Ener! avinEner! avin NoNo @es>
Te#$. =luctuationTe#$. =luctuation 2C 2C 0.&C 0.&C
AdDust to LoadAdDust to Load NoNo @es@es
tart5u$tart5u$ Current sure o7 *5Current sure o7 *511?11?
o7t5start. Noo7t5start. Nocurrent surecurrent sure
=ull Load 9$.=ull Load 9$. NoNo @es> o$erates at@es> o$erates athih 7re:.hih 7re:.
$eed o7 Cool)Heat$eed o7 Cool)Heat lo6lo6 =ast=ast3e7rostin3e7rostin Less e77icientLess e77icient Accurate and 7astAccurate and 7ast
'rotection =eatures'rotection =eatures BasicBasic Co#$leteCo#$lete
Auto5+ode =eaturesAuto5+ode =eatures BasicBasic Co#$leteCo#$lete
Advantaes o7 Inverter Air ConditionersAdvantaes o7 Inverter Air Conditioners
Basic Inverter Technolo!
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Components
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f#n motors
He#t
e$c%#n&ers wit%&ol' fin #s
st#n'#r'
#ter pump
rue 'u#l circuits PH*
(r#ze' pl#te %e#t
e$c%#n&er)
*$p#nsion
t#n+ ( ,-)Control .o$
#ssem.ly
Coil &u#r's#n &u#r's
Co#$onents
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Co#$onents
E+I =ilter
=unction"E+I =ilter is a device $laced
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C t
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'o6er Board
:To convert recti7ied 3C current
F&0(3Cto res$ective desired voltaes:12(3C rela!:+C F&(3C:I'+ F1&(3C
:Ensure sta
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Ca$acitor Board
Co#$onents
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Control Algorithm
C t l Al ith
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General Control =lo6 ChartGeneral Control =lo6 Chart
;t#rt
1o
;top Inverter Comp
=es
;top pump
20s
Cl#s% .etween
current > selecte'
mo'e of oper#tion?
Coolin& mo'e
1o
He#tin&?1o
=es=es
He#tin& mo'e
;ystem 9n?
=es
Coolin&?1o
70s
;top i$e' Comp
Control Alorith#
C t l Al ith
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(ariaet temp : ;?>C
T : ? to C
Control Alorith#
Control Alorith#
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(aria
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Control Alorith#
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=i?ed 3rive Co#$ressor Control=i?ed 3rive Co#$ressor Control
Cooling mode
Start up condition :
Pump runs normally for 3 minutes *
T water return T set ; 4C
No irreersi!le errors in %&ed drie and t"esystems
Satisfy a delay of 3 minutes !efore restart #
Note 9 I% variale drive system starts 6rst! the 6)ed drivesystem will only start a%ter the %re@uency o% variale drivedrops to '(H/#
* epends on Parameter P2 +,ow switc" alarm delay at pump start) -in (s' ma& .//s' default.0(s 1#epends on Parameter C2 +compressor min stop time) -in (s' ma& .//(s' default .0(s1
.or e)ample 9Water return temp :;=>C
et temp :;?>CT :C
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=i?ed 3rive Co#$ressor Control=i?ed 3rive Co#$ressor Control
Cooling mode
Coolin mode selected water pump starts utdoor fan starts compressor starts
utdoor fan will start sec !efore compressorstart
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=i?ed 3rive Co#$ressor Control=i?ed 3rive Co#$ressor Control
Cooling mode
S"ut down condition :
Coolin mode terminates' 8
T set 9T water return ; 2C and aria!le fre7uency drops pass
2(56
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(aria
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R#te' req6
5Hz
5Hz
t
@ min 70 sec 7 min
919
919
#ri#.le 'rive comp
9ut'oor f#n
919#ri#.le
5 sec
(aria
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(aria
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=i?ed 3rive Co#$ressor Control=i?ed 3rive Co#$ressor Control
Heating modeStart up condition :
Pump runs normally for 3 minutes *
T set : T water return ; 4C
No irreersi!le errors in %&ed drie and t"esystems
Satisfy a delay of 3 minutes !efore restart #
Note 9 I% variale drive system starts 6rst! the 6)ed drivesystem will start a%ter the variale drive %re@uency drops to'(H/#
* epends on Parameter P2 +,ow switc" alarm delay at pump start) -in (s' ma& .//s' default.0(s 1#epends on Parameter C2 +compressor min stop time) -in (s' ma& .//(s' default .0(s1
.or e)ample 9et temp :C
Water return temp :8=>CT :C
Control Alorith#
Control Alorith#
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=i?ed 3rive Co#$ressor Control=i?ed 3rive Co#$ressor Control
Heating mode5eatin mode selected water pump starts
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=i?ed 3rive Co#$ressor Control=i?ed 3rive Co#$ressor Control
Heating modeS"ut down condition :
5eatin mode terminates' 8
T water return9 T set ; 2C
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'u#$ Control'u#$ Control
Pump start up="en startin t"e system' pump will run for 3 minutes *!efore proceedin to ne&t step)
Depen's on P#r#meter P8 (flow switc% #l#rm 'el#y #t pump st#rt6 !in 0s4 !#$ 7s4
'ef#ult 780s)
Pump s"ut down
>fter !ot" compressors s"ut down for . minute' pump s"uts
down)
Control Alorith#
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Protection
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'rotection
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Co#$ressor 9ver5Current 'rotectionCo#$ressor 9ver5Current 'rotection
2ariale drive compressor
InvInvCo#$Co#$
CurrentCurrent
+&AC(+&AC(0"00"0
+&AC(+&AC(0&&0&&
+&AC(+&AC(0*&0*&
+&AC(+&AC(100100
+&AC(+&AC(1"&1"&
+&AC(+&AC(210210
IIaa
22 20.&20.& 20.&20.& 20.&20.& 20.&20.& 20.&20.&
II
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Co#$ressor 9ver5Current 'rotectionCo#$ressor 9ver5Current 'rotection
.i) drive compressor
="en %&ed compressor current ; $e) T"e compressor will stops andresumes after 3 minutes
Note: ="en eit"er drie oerload protection occurs more t"an 3 timeswit"in 3( minutes' system triers irreersi!le error protection)
=i?ed co#$ressor sto$sCo#$ a#$
,A/
Ie
'rotection
'rotection
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Hih 3ischare Te#$erature 'rotectionHih 3ischare Te#$erature 'rotection
2ariale drive system="en aria!le drie disc"are temperature reac"es ..(C' systemstops)="en aria!le drie disc"are temp) !etween .((C and ..(C'fre7uency drops)="en aria!le drie disc"are temperature is less t"an /?C and moret"an .((C'
fre7uency increased restricted)="en disc"are temperature falls !elow /4C' normal operationresumes)
!ste# shuts do6n
=re:uenc! ste$ do6n
+aintain 7re:uenc!
Nor#al o$eration
Co#$ressor
dischare
te#$erature
110C
100C
*C%C
'rotection
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'rotection
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9utdoor Coil Hih Te#$erature 'rotection9utdoor Coil Hih Te#$erature 'rotection
2ariale drive system
urin coolin' w"en Tcoil.; @( C' fre7uency drops)
urin coolin' w"en Tcoil.A C' system resumes)
.i)ed drive system
urin coolin' w"en Tcoil2; @4C' compressor stops)
urin coolin' w"en Tcoil2A .C' system resumes)
'rotection
'rotection
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Lo6 'ressure 6itch 'rotectionLo6 'ressure 6itch 'rotection
>larm delayed at compressor startup : 3( sec depends onParameter P3*)No protection durin defrostin)$f aria!le drie or %&ed drie low pressure switc" is actiatedfor seconds' alarm will !e triered)
P#r#meter P@ (-ow pressure #l#rm 'el#y #t compressor st#rt up6 !in0s4 m#$7s4 'ef#ult@0s)
1ote E If low pressure #l#rm occur more t%#n @ times wit%in
@0 minutes4 system s%uts 'own to irreversi.le error6
'rotection
'rotection
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Hih 'ressure 6itch 'rotectionHih 'ressure 6itch 'rotection
$f %&ed drie "i" pressure switc" is actiated for 3( sec'alarm will !e triered)$f aria!le drie "i" pressure switc" is actiated'
fre7uency of aria!le drie compressor will decrease at.56Bs) $f it is re9actiated for 3( sec' alarm will !e triered)
1ote E If %i&% pressure #l#rm occur more t%#n @ times wit%in
@0 minutes4 system s%uts 'own to irreversi.le error6
'rotection
'rotection
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$f 3 p"ase >C p"ase se7uence is incorrectlyconnected' system will not start and controller willindicate error) System will resume afterrecti%cation) +e&cept ->C(3(C81
$f p"ase missin "appens' system will not operate)
Controller will indicate error) System will resumeafter recti%cation)
8 Phase &C Phase e@uence Protection
8 Phase &C Phase *issing Protection
'rotection
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Than- @ouThan- @ou