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參數(shù)資料
| 型號： | ADE7752AR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | LJT 41C 41#20 SKT PLUG |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | MS-013AD, SOIC-24 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 474K |
| 代理商： | ADE7752AR |
REV. PrB 08/01
–7–
PRELIMINARY TECHNICAL DATA
ADE7752
Meter connections
In three phase service, two main power distribution services
exist: 3-phase 4-wire or 3-phase 3-wire. The additional wire
in the 3-phase 4-wire arrangement is the Neutral wire. The
voltage lines have a phase difference of ±120° (± 2
π
/3
radians) between each other - See Equation 5.
)
3
4
cos(
2
)
(
)
3
2
cos(
2
)
(
;
)
cos(
2
)
(
π
ω
π
ω
ω
+
=
+
=
=
t
l
V
t
V
t
l
V
t
V
t
l
V
t
V
C
C
B
B
A
A
(5)
Where: V
A
, V
B
and V
C
represent the voltage RMS value of the
different phases
The current inputs are represented by Equations 6,
)
3
4
cos(
2
)
(
)
3
2
cos(
2
)
(
;
)
cos(
2
)
(
C
l
C
C
B
l
B
B
A
l
A
A
t
I
t
I
t
I
t
I
t
I
t
I
π
ω
π
ω
ω
+
+
=
+
+
=
+
=
(6)
Where: I
A
, I
B
and I
C
represent the RMS value of the current
of each phase and
φ
A
,
φ
B
and
φ
C
the phase difference of the
current and voltage channel of each phase.
The instantaneous powers can then be calculated as follows:
)
(
)
(
)
(
)
(
)
(
)
(
)
(
)
(
)
(
t
I
t
V
t
P
t
I
t
V
t
P
t
I
t
V
t
P
C
C
C
B
B
B
A
A
A
=
=
=
Then,
)
3
8
2
cos(
)
cos(
)
(
)
3
π
4
2
cos(
)
cos(
)
(
)
2
cos(
)
cos(
)
(
C
l
C
C
C
C
C
C
B
l
B
B
B
B
B
B
A
π
l
A
A
A
A
A
A
t
I
V
I
V
t
P
t
I
V
I
V
t
P
t
I
V
I
V
t
P
ω
ω
ω
+
+
=
+
+
=
+
=
(7)
As can be seen from Equation 7, in the ADE7752 the real
power calculation per phase is made when current and voltage
inputs of the one phase are connected to the same channel (A,
B or C). Then, the summation of each individual real power
calculation gives the total Real Power information. P(t) =
P
A
(t) + P
B
(t) + P
C
(t)
Figure 14 demonstrates the connections of the analog inputs
of the ADE7752 with the power lines in a 3-phase 3-wire
Delta service.
Source
CT
CT
Rb
Rb
IAP
IAN
Anti-aliasing
Filters
IBP
IBN
AnFilters
Ra*
Rb*
VR*
Rf
Cf
Cf
VN
VAP
Ra*
Rb*
VR*
Cf
VBP
Load
Phase A
Phase B
Phase C
Figure 14 - 3-phase 3-wire meter connection with ADE7752
Note: Only 2 current inputs and 2 voltage inputs of the
ADE7752 are used in this case. The Real power calculated
by the ADE7752 does not depend on the selected channel.
Figure 15 demonstrates the connections of the analog inputs
of the ADE7752 with the power lines in a 3-phase 4-wire Wye
service.
Source
CT
CT
Rb
Rb
IAP
IAN
Anti-aliasing
Filters
ICP
ICN
Anti-aliasing
Filters
Ra*
Rb*
VR*
Rf
Cf
Cf
VN
VAP
Ra*
Rb*
VR*
Cf
VCP
Load
CT
Rb
IBP
IBN
Anti-aliasing
Filters
Ra*
Rb*
VR*
Cf
VBP
Phase A
Phase B
Phase C
Figure 15 - 3-phase 4-wire meter connection with ADE7752
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADE7752ARRL | 制造商:Analog Devices 功能描述:Energy Measurement 24-Pin SOIC W T/R 制造商:Analog Devices 功能描述:IC ENERGY METER |
| ADE7752ARZ | 制造商:Analog Devices 功能描述:Energy Measurement 24-Pin SOIC W |
| ADE7752ARZ-RL | 制造商:Analog Devices 功能描述:Energy Measurement 24-Pin SOIC W T/R |
| ADE7752B | 制造商:AD 制造商全稱:Analog Devices 功能描述:Polyphase Energy Metering IC with Pulsed Output |
| ADE7752BARW | 制造商:AD 制造商全稱:Analog Devices 功能描述:Polyphase Energy Metering IC with Pulsed Output |
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