ADE9078 datasheet(49/108 Pages) AD

49 / 108 page

ADE9078

Data Sheet

Rev. 0 | Page 48 of 107

AWATT

INTERNAL POWER

ACCUMULATOR

AWATT, LOW PASS

FILTERED

ACTIVE POWER

POSITIVE

ACTIVE POWER,

PWATT_ACC

PHASE A ACTIVE POWER

SIGN INDICATION:

AWSIGN, IN PHSIGN

POWER UP DATE INTERVAL

SET IN PWR_TIME

ACCUMULATED

ACTIVE POWER,

AWATT_ACC

NEGATIVE

ACTIVE POWER,

NWATT_ACC

PHASE A ACTIVE POWER

SIGN CHANGE INDICATION:

REVAPA, IN STATUS0

CLEARED AFTER USER WRITES STATUS0

Figure 68. Power Accumulation and Power Sign

Zero-Crossing Detection

The ADE9078 offers zero-crossing detection on the VA, VB,

VC, IA, IB, and IC input signals. The neutral current channel,

IN, does not contain a zero-crossing detection circuit. Figure 69

shows the current and voltage channel datapaths preceding

zero-crossing detection. The zero-crossing circuit is the time

base for resampling, line period, angle measurements, and

energy accumulation using line cycle accumulation mode. The

xV_PCF and xI_PCF are the voltage and current channel

waveforms processed by the DSP, which can be stored into the

waveform buffer at a 4 kSPS data rate (see the Waveform Buffer

section for more information).

CURRENT CHANNEL

VOLTAGE CHANNEL

ZX DETECTION

LPF1

xVGAIN

PHASE

COMP

HPFDIS

ZX_SRC_SEL

VCONSEL1

VB = –VA – VC

VB = VA – VC

VB = –VA

VA = VA – VB;

VB = VA – VC;

VC = VC – VB;

xIGAIN

HPF

xIGAINx

PHASE

COMP

INTEGRATOR

MTEN

HPFDIS

INTEN

ICONSEL2

IB = –IA – IC

xV_PCF

xI_PCF

ZX_SRC_SEL

÷32

ZX DETECTION

LPF1

2ICONSEL ONLY AFFECTS IB CHANNEL CALCULATION

1VCONSEL SUPPORTS SEVERAL 3-WIRE AND 4-WIRE HARDWARE CONFIGURATIONS

÷32

100

011

010

001

000

Figure 69. Voltage and Current Channel Signal Chain Preceding Zero-Crossing Detection

ADE9078 数据表(PDF) 49 Page - Analog Devices

ADE9078 数据表(HTML) 49 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载

链接网址

ADE9078 数据表(PDF) 49 Page - Analog Devices

ADE9078 数据表(HTML) 49 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表 下载

链接网址

数据表下载