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Transcript of Boston VFD Course
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7/25/2019 Boston VFD Course
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&
D
: , .E.
10, 2014
:
D (D)
P
,
.
H
,
V
.
V /
/.
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D A
I F, P, C
C S
C HVAC C
P A H
R V S HVAC
E E W M
? C S
B &
C &
G
M
V S
V &
E H
W
DC D
AC V F D
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?
S /
U
,
&
V
V & D
0
1000
2000
3000
4000
5000
6000
1 2 3 4 5 6 7 8 9 10 11 12
CFM
Typical Airflow Requirements
Min
Avg
Max
Month
C?
I C VFD
M C VFD
M I
(D, )
E H I
/ ?
O?
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= C ???
S S S .
T .
A
.
F E F (/)
#
S = (120 * F)/(# )
R S S
.
D M , #
, .
E: 4 @ 60 = 1800
4 @ 50 = 1500
4 @ 40 = 1200
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D
I: 60 AC &
C R DC &
I C DC AC
R A
% /
.
V/H R (480/60 = 8)
AC O: D
.
W
?
T
I ,
.
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!!!!
F ,
,
.
W
AND ?
R H R !
?
W
60 ? 4 @ 60 = 1800
4 @ 70 = 2100
M
. T
.
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C A
C T L , ,
&
, ,
.
V T L
, ,
C H
L
C
A T
S.
T S C
S T
P U T
B T
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S
T
I VFD
.
C R
. F ,
.
H
.
E: C ,
&
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C
H
. A 50%
50%
.
E VFD
.
R &
.
P
.
E:
C , &, .
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H
. A 50%
88%
.
E VFD
.
C
C
, , . S
,
VFD'
.
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C
T DC
D
S
AC F V D
T
VFD
.
A: E
T .
C F, P,C
A ,
.
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E
T
(, , )
.
D
,
.
E D
U VFD
,
.
T
/
.
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D
P F P
VFD
T P F
D P F
U
VFD
A:
A VFD
.
VFD
150% FLA/RLA .
W
?
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()
R .
C .
R .
A: C
C
DCS PLC.
M
.
B
?
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A:
E
.
E
.
R
.
C E
M
, ,
.
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:
C
F
.
A VFD
.
D
D
&
K C
K D
K T
NEMA 1 NEMA 12
NEMA 1
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A: B C
I , .
(A )
A: C
S VFD
.
R
.
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A: C
VFD 3 .
M 150% 125H
I: C VFD P C D 95% N R V S? E P P M ( )
* H
D: C I VFD
.
E
.
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D C ?
A VFD / ? F
.
T , , .
H
?
D: C
VFD
.
M
&
.
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D:
VFD
(
)
. A ,
.
C
.
D /
I
A P M/F ($)
U
G P M
(C F, H, N, ) ($) I R M ($)
I D M ($)
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D:
VFD & , .
I S C
, ,, .
O S C
.
D A
1. I .
1. I
2. O
3. S
4. C
2. P
/.
1. E
2. E /
3. V &.
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D
H
AC DC
I 60 . 2 2 X 60 = 120 3 3 X 60 = 180 4 4 X 60 = 240
O .
-250
-200
-150
-100
-50
0
50
100
150
200
250
Voltage
Time
Resultant Waveform
Voltage
Time
Harmonic Distortion
3rd Harmonic(+)
(-)
C B VFD
. T
S E H O
3, 5, 7, 11, 13, 15, .
VFD F
P
5& 7, 11 & 13, .
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D (D)
C
.
T
.
T % ,
(THD) .
E: 7% THD
7% 60
T
.
D
E
L .
D
. I , VFD .
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C D =
D
AC
T ,
T ; ,
,
B C
. I T
RMS ,
. NT RMS RMS ,
.
NT RMS
.
M RMS
RMS . O
RMS .
A .
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C
.
H
KF T
T
.
S
.
KF
. S KF T
KF .
& C
C
( )
()
.
H
C
.
C (5, 7,
)
.
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R (5, 11,17, 23, ) T
E .
T , .
I ,
? T
.
B
E VFD :
R F
C M N T H (3,9,15,
) R
.
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A V/T VFD . W ,
.
V
. C .
AC D
V V I (VVI)
O
C S I (CSI)
P W M (PWM)
N
V V
V F D
F V D
S F V (C L)
S D (O L)
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()
1 AC D
.
C SS D
A G
M
S
D P
P
S
L I T
C (C)
V
.
S /
.
A H
R
D P
L
P
I
L
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()
N & .
B .
A
H
W
H
N
D C S
D C PWM
V V V
F (VVVF) D C V/H
F V
C &
C L O F V D
O L S V D
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()
T
PWM .
V V/H
.
W
.
M
F
L F V D
D (C ) U
. F,
C
. T DC D
.
L DC D
VVVF . R
.
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( ) D
A C L F V
.
C L
S
.
M C L F
V
.
A
?
H ?
A DC D?
DC
.
A
H, ;
E
S
M DC
DC
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EC ?
N DC D
DC
H
.
L AC VFD
AC
L
DC
AC D D
N
.
3 P VFD 6
(6, 12, 18, 24, .)
T
. H #:
L
M &
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D
VFD . T
.
T
. T ,
.
B
,
.
& C : = + 1
W , , =
6 P D
= 1 6 + 1 = 5 & 7
= 2 6 + 1 = 11 & 13
12 P D
= 1 12 + 1 = 11 & 13 = 2 12 + 1 = 23 & 25
A ,
( ) .
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C
S
/
.
E: 12 18
(,
)
6 (,
)
D A & C
C/B R? H
.
I P C M
?
M R
/ ?
P Q C I I
?
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EA A AC
A D
D NEMA 2001
& . (81 )
P:
$93
E FREE
.. .
EA D &A
M S
.
D T S
E S W NEMA
M I W NEMA
C L S
F B
D PLC
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D C
B T S
A T A
R T A
P T D ?
H T I
/
?
C
T VFD
I
?
W
VFD ?
W
? A ?
A ..
/ ?
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EA C
I: M H
B F
I D V O
M T S
G P M NEMA T A,B,C, D
I R
I D M
EA D C
I:
I & O WD
V O
R
L S C
D T S
V V I (VVI) C S I (CSI)
P W M(PWM)
P #: 6, 12, 18, 24, 30,
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EA C
I I A T:
< 40 C (104 F)
I ,
A: < 3300
I ,
E T A
L
M R
Altitude not over 3,300 ft.
EA E C
V L .
NEMA M: + 10%
NEMA D: + 15%
M + 10% LESS.
V U D 3%
M 3%
S P S
. I , / . F
+ 3% ( )
P F C C B .
C .
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D A
1. I .
1. I
2. O
3. S
4. C
2. P /.
1. E
2. E /
3. V &.
D C
P P
M
S
R
B &
H V
H
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U
. T
.
F
.
W ,
.
/C R
VFD . L
.
I () ,
. (T D)
C .
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C A ?
N (5,11,17) .
P S
I
L ,
H
B B G P M
D P M
/D G P M
B NEMA
C .
I C B > 1.0
I R M G
. (C H )
W
M ,
I D M S
H (ISR) P 1600
C
U .
W ,
.
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B
&
C
E :
R F
C M N TH (3,9,15, )
S
S
I
L , .
S
A V/T
VFD . W ,
.
V . C
.
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P 3550 .
D
L
P
P R T, C L, M
D P N, T T (
), U M M
NEMA C I & II
.
C I L C II H
U
U (W 230/460 230).
A .
E C I II .
C I: M NEMA MG1 P 31
.
I C II, :
U
. M
. I
, V/T (
)
.
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D C
P P
H D N
T
F
C
U/
N D T T
I H
P S
L , .
U
K F T
C
IEEE 519 G
T V S
S (TVSS) UPS
() L
,
I T
L, S O, F
C/B O
O T
C
P S T V S
S (TVSS)
L
Voltage
Time (seconds)
Impulsive Transient(+)
(-)
Voltage
Time
Oscillatory Tranients(+)
(-)
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D E
A T P C C (PCC).
T 250 H .
E .
M
3,000 (480 ) 0 .
Voltage
Time (seconds)
Impulsive Transient(+)
(-)
/
A .
D , , , , .
T S: W .
T V S S(TVSS) .
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D, & C
T NEMA D AS . O
.
L
NEMA
.
D
C
C ( ) . S
.
T
. S
.
T TV S S (TVSS) .
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C C C
C
( ) () .
H C
. C
. C
(5, 7, ) .
S
C
A T
.
S
.
A
.
T
.
T
.
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/
T
/
.
E
,
.
T S:
T T V S
S (TVSS)
.. .
D
A NM 20 (350 H ) .
T .
T / 20 .
P .
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M THD 30 37% .
A M.
T S: T
.
W .. .
D ?
NEMA D A G:
I .
T .
W
# & ( & )
I (, , ) M 58% V THD
!
S .
I .
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?
IEEE 5191992; R P &R H C E PS
O 1981. 1992.
L
L THD .
T .. .
M .
EEE 519 R
P C C
(PCC) & . L 5% THD
.
P THD THD
L
.
C THD < .
W THD 519? P ?
W X ?
S ?
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EEE 519
C T D D (TDD) P C C (PCC)
I/IL PCC.
C D D
(120 69,000)
C D
ISC/IL
Individual Harmonic Order (Odd Harmonics)
< 11 11< h < 17 17 < h < 23 23 < h < 35 35 < h TDD
< 20 4.0 2.0 0.6 0.5 0.5 5.0
20 < 50 7.0 3.5 1.0 0.5 0.5 8.0
50 < 100 10.0 4.5 1.5 0.7 0.7 12.0
100 < 1000 12.0 5.5 2.0 1.0 1.0 15.0
> 1000 15.0 7.0 2.5 1.4 1.4 20.0
Even harmonics are limited to 25% of the odd harmonic limits.
E EEE 519 U &
(THD) .
I IEEE 519 ,
. I
W ?
I
H
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1990 E E
A OK P VFD E /
.
E .
C (812%) THD IEEE 519 .
C .
T (5 ) . T .
T FCC .
A FCC .
T .
2010 E E H VFD
NM .
T THD IEEE 519
VFD . T
.
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P
.
P
.
E
.
P " "
.
C
.
P S
H ,
KF T
KF
. T K
F
S KF T
KF .
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D E E
T VFD
(, , )
/ .
I /
, VFD .
D E E M/P I & O
H F R P E .
D C O E: 100% 1 , 80%
10 60% 8 .
E C E / D /
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E: D
E M
3P, 100 H, 92% .
O 20 / 6 12 : 50%
12 M: 75%
M2 : 100%
E R $0.05/W
$5/W, 8 10 I VFD
?
0
25
50
75
100
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
D C
D ?
M..
W
?
W
?
S
.
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/ C
T F/P C .
W
/ ?
I
.
D &
U VFD
/
.
T
,
.
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F 100 H @ 92%
(0.746 W/H * 100 H)/0.92 = 81 W
A: .
E U:
81 W*20 /*7 /*52 / = 589,680W/
E B:
81 W * $5/W/* 12 = $4,860.00
589,680 W*$0.05W = $29,484.00
T E B = $34,344.00
D?? P D C
6 / @ 50%
12 / @ 75%
2 / @ 100%
Y 75% = 75% (A L) 100% : 100 * 13 = 100
T ?
75% : 100 X .753 = 42.2
50% : 100 * .53
= 12.5 P VFD; 6 / @ 12.5
12 / @ 42.2
2 / @ 100
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E ?
T
4050% .
W
100 H
42.5 12.5 H?
; D
T
VFD,
/.
D :
M
C
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D
100% F = N .81 W
(0.746 W/H 100 H)/0.92 = 81 W
75% F = 80%
(0.746 W/H 42.5 H)/0.8 = 39.6 W
50% F = 40%
(0.746 W/H 12.5 H)/0.4 = 23.3 W
C E B
81 W*2 /*7 /*52 / = 58,968W/
39.6 W*12 /*7 /*52 / = 172,973W/
23.3 W*6 /*7 /*52 / = 50,887W/
T E U: 282,828 W/
E B:
39.6 W * $5/W/* 12 = $2,376.00
282,828 W*$0.05/W = $14,141.40
T = $16,517.40
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E
C S:
$34,344.00$16,517.40=$17,826.60
P/I: $15,000
(L 1990 )
C 100 H VFD C:
$4,000 $12,000 .
VFD VFD .
E :
P
$15,000/$17,826.60 = 0.84 10
M VFD 50,000 (
)
50,000 /7280 / = 6.9
T VFD 6.9 7280 0.84
(10 )
.
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A
D M
..
US D E
I M & D S P: A
S I
WI F E
C Y E C VFD
CE
://..////.
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