參數(shù)資料
型號(hào)： ADE7758ARW
廠商： ANALOG DEVICES INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： Poly Phase Multifunction Energy Metering IC with Per Phase Information
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO24
封裝： MS-013-AD, SOIC-24
文件頁(yè)數(shù)： 45/68頁(yè)
文件大?。?/td> 1584K
代理商： ADE7758ARW
ADE7758
The AWG value is calculated to be 84 d using Equation 33,
which means the value 0x3F should be written to AWG.
Rev. A | Page 45 of 68
84
%
0244
.
%
04
.
–
=
=
xWG
Phase Calibration Using Pulse Output
The ADE7758 includes a phase calibration register on each
phase to compensate for small phase errors. Large phase errors
should be compensated by adjusting the antialiasing filters. The
ADE7758’s phase calibration is a time delay with different
weights in the positive and negative direction (see the Phase
Compensation section). Because a current transformer is a
source of phase error, a fixed nominal value may be decided on
to load into the xPHCAL registers at power-up. During
calibration, this value can be adjusted for CT-to-CT error.
Figure 78 shows the steps involved in calibrating the phase
using the pulse output.
0
START
ALL
PHASES
PHASE ERROR
CALIBRATED
END
YES
NO
STEP 1
SET UP PULSE
POUTPUT FOR
AND ENABLE CF
OUTPUTS
STEP 2
SET UP SYSTEM
FOR I
, V
NOM
,
PF = 0.5
STEP 3
MEASURE %
ERROR IN APCF
STEP 4
CALCULATE PHASE
ERROR (DEGREES)
STEP 5
CALCULATE AND
WRITE TO
XPHCAL
PERIOD OF
SYSTEM
MEASURE
PERIOD USING
FREQ REGISTER
NO
YES
Figure 78. Phase Calibration Using Pulse Output
Step 1: Step 1 and Step 3 from the gain calibration should be
repeated to configure the ADE7758 pulse output.
Step 2: Set the test system for I
TEST
, V
NOM
, and 0.5 power factor.
Step 3: Measure the percent error in the pulse output, APCF,
from the reference meter using Equation 31.
Step 4: Calculate the
Phase Error
in degrees using the following
equation:
( )
°
=
3
sin
Arc
–
ERROR
CF
Error
Phase
(35)
Step 5: Calculate xPHCAL
( )
( )
°
×
°
×
=
Error
Phase
Period
μs
xPHCAL
1
360
4
–
(36)
If it is not known, the period is available in the ADE7758’s
frequency register, FREQ (0x10). Equation 37 shows how to
determine the value that needs to be written to
xPHCAL
using
the period register measurement. In Equation 37, the 2.4 μs is
for phase errors that are negative. For positive phase errors, the
2.4 μs is replaced by 4.8 μs (see the Phase Compensation
section).
[
]
0
11
FREQ
s
s
Error
xPHCAL
°
×
μ
μ
×
=
360
4
6
3
sin
Arc
1
(37)
Example—Phase Calibration of Phase A Using Pulse Output
For this example,
I
TEST
= 10 A,
V
NOM
= 220 V,
V
FULLSCALE
= 500 V,
I
FULLSCALE
= 130 A,
MC
= 3200 impulses/kWh,
Power Factor
= 0.5
inductive, and
Frequency
= 50 Hz.
With I
TEST
, V
NOM
, and 0.5 inductive power factor, the example
ADE7758 meter shows 0.9821Hz on the pulse output. This is
equivalent to 0.215% error from the reference meter value using
Equation 31.
The
Phase Error
in degrees using Equation 35 is 0.07°.
( )
°
°
=
=
07
.
–
3
00215
.
sin
Arc
–
Error
Phase
If at 50 Hz the FREQ register = 2083d, the value that should be
written to APHCAL (0x15) is 0x15 using Equation 37.
21
66
.
20
2083
360
s
4
s
6
07
.
1
=
=
°
×
μ
μ
×
°
=
APHCAL
Power Offset Calibration Using Pulse Output
Power offset calibration should be used for outstanding
performance over a wide dynamic range (1,000:1). Calibration
of the power offset is done at or close to the minimum current
where the desired accuracy is required. The ADE7758 has
power offset registers for watts and VAR (xWATTOS and
xVAROS). Offsets in the VA measurement are compensated by
adjusting the rms offset registers (see the Calibration of IRMS
and VRMS Offset section). Figure 79 shows the steps to
calibrate the power offsets using the pulse outputs.
相關(guān)PDF資料
PDF描述
ADE7758ARWRL Poly Phase Multifunction Energy Metering IC with Per Phase Information
ADE7758ARWZ Poly Phase Multifunction Energy Metering IC with Per Phase Information
ADE7758ARWZRL Poly Phase Multifunction Energy Metering IC with Per Phase Information
ADE7759ARSRL Active Energy Metering IC with di/dt Sensor Interface
ADE7759ARS 8-Channel 14-Bit Single-Supply Voltage-Output DAC; Package: LQFP (10x10mm); No of Pins: 52; Temperature Range: Industrial
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADE7758ARWRL 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
ADE7758ARWZ 功能描述:IC ENERGY METERING 3PHASE 24SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測(cè)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:*
ADE7758ARWZ 制造商:Analog Devices 功能描述:ENERGY METERING IC 制造商:Analog Devices 功能描述:IC, POLY-PHASE ENERGY METERING, SOIC-24
ADE7758ARWZ 制造商:Analog Devices 功能描述:IC ENERGY METER 3 PHASE SOIC-24
ADE7758ARWZRL 功能描述:IC ENERGY METERING 3PHASE 24SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測(cè)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:*
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*