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參數(shù)資料
| 型號： | ADE7763 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 電能質(zhì)量分析儀 |
| 英文描述： | Single-Phase Active and Apparent Energy Metering IC |
| 中文描述： | 單相有功功率和視在電能計(jì)量IC |
| 文件頁數(shù)： | 38/56頁 |
| 文件大小： | 1328K |
| 代理商： | ADE7763 |
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ADE7763
WGAIN is calculated to be 480 using Equation 43.
Rev. A | Page 38 of 56
WGAIN
=
INT
480
2
1
17174
19186
12
=
×
Note that WGAIN is a signed, twos complement register.
With
WDIV
and
CFNUM
set to 0,
LAENERGY
can be
expressed as
LAENERGY
IB
(
expected
)
=
(
(
CF
INT
expected
IB
))
1
(
/
2
)
+
×
×
×
×
CFDEN
CLKIN
PERIOD
LINECYC
IB
The calculated Wh/LSB ratio for the active energy register,
using Equation 35 is 6.378 × 10
4
is
4
10
378
.
imp/Wh
200
.
)
489
(
1
LSB
Wh
×
=
+
=
Watt Offset
Offset calibration allows outstanding performance over a wide
dynamic range, for example, 1000:1. To do this calibration two
measurements are needed at unity power factor, one at I
b
and
the other at the lowest current to be corrected. Either calibra-
tion frequency or line cycle accumulation measurements can be
used to determine the energy offset. Gain calibration should be
performed prior to offset calibration.
Offset calibration is performed by determining the active energy
error rate. After determining the active energy error rate, calcu-
late the value to write to the APOS register to correct the offset.
APOS
=
CLKIN
Rate
Error
AENERGY
35
2
×
(45)
The AENERGY registers update at a rate of CLKIN/4. The twos
complement APOS register provides a fine adjustment to the
active power calculation. It represents a fixed amount of power
offset to be adjusted every CLKIN/4. The 8 LSBs of the APOS
register are fractional such that one LSB of APOS represents
1/256 of the least significant bit of the internal active energy
register. Therefore, one LSB of the APOS register represents 2
33
of the AENERGY[23:0] active energy register.
See the following sections for steps to determine the active
energy error rate for both line accumulation and reference
meter calibration options.
Calibrating Watt Offset Using a Reference Meter Example
Figure 73 shows the steps involved in calibrating watt offset
with a reference meter.
WRITE APOS VALUE TO THE APOS
REGISTER: ADDR. 0x11
MEASURE THE % ERROR BETWEEN THE
CF OUTPUT AND THE REFERENCE METER
OUTPUT, AND THE LOAD IN WATTS
SET I
TEST
= I
MIN
, V
TEST
= V
NOM
, PF = 1
0
CALCULATE APOS. SEE EQUATION 45.
Figure 73. Calibrating Watt Offset Using a Reference Meter
For this example:
Meter Constant:
Minimum Current:
Load at Minimum Current:
CF Error at Minimum Current: %
ERROR
CF
(
IMIN
)
= 1.3%
CF Numerator:
CF Denominator:
Clock Frequency:
MeterConstant
(imp/Wh) = 3.2
I
MIN
= 40 mA
W
IMIN
= 9.6 W
CFNUM
= 0
C
DEN
= 489
C
KIN
= 3.579545 MHz
Using Equation 45,
APOS
is 522 for this example.
CF Absolute Error = CF
IMIN
(
nominal
)
CF
IMIN
(
expected
)
(46)
CF Absolute Error
=
(%
ERROR
CF
(
IMIN
)
) ×
W
IMIN
×
3600
(imp/Wh)
ant
MeterConst
(47)
CF Absolute Error
=
%
3
×
Hz
000110933
.
3600
200
.
6
100
=
×
Then,
AENERGY Error Rate
(LSB/s) =
CF Absolute Error
×
1
1
+
+
CFNUM
CFDEN
(48)
AENERGY Error Rate
(LSB/s) =
490
=
0.000110933 ×
05436
.
1
Using Equation 45, APOS is 522.
APOS
=
522
10
579545
.
2
05436
.
6
35
=
×
×
APOS
can be represented as follows with CFNUM and WDIV
set at 0:
APOS
=
CLKIN
CFDEN
(
ant
3600
MeterConst
W
ERROR
IMIN
IMIN
CF
35
)
(
2
)
(imp/Wh)
)
(%
×
+
×
×
×
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADE7763_13 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Single-Phase Active and Apparent Energy Metering IC |
| ADE7763ARS | 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP 制造商:Rochester Electronics LLC 功能描述:1 PHASE ACTIVE AND APPARENT ENERGY IC - Bulk |
| ADE7763ARSRL | 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP T/R |
| ADE7763ARSZ | 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:* |
| ADE7763ARSZ | 制造商:Analog Devices 功能描述:IC, SINGLE PHASE ENERGY METER, SSOP-20 |
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