ADE9153AACPZ datasheet(23/50 Pages) AD

23 / 50 page

Data Sheet

ADE9153A

Rev. 0 | Page 23 of 50

High-Pass Filter

A high-pass filter removes dc offsets for accurate rms and energy

measurements. This filter is enabled by default and features a

corner frequency of 1.25 Hz.

To disable the high-pass filter on all current and voltage channels,

set the HPFDIS bit in the CONFIG0 register. The corner frequency

is configured with the HPF_CRN bits in the CONFIG2 register.

Digital Integrator

A digital integrator is included on Current Channel B for the

possibility of interfacing with a di/dt current sensor, also known

as Rogowski coils. It is important to take note that the integrator

cannot be used with any of the mSure functions. To configure

the digital integrator, use the INTEN_BI bits in the CONFIG0

Phase Compensation

The ADE9153A provides a phase compensation register for

each current channel: APHASECAL and BPHASECAL. The

phase calibration range is −15° to +2.25° at 50 Hz and −15° to

+2.7° at 60 Hz.

Use the following equation to calculate the xPHASECAL value

for a given phase correction (φ)° angle. Phase correction (φ)° is

positive to correct a current that lags the voltage, and negative

to correct a current that leads the voltage, as seen in a current

transformer.

xPHASECAL =

)

–

sin(

sin

)

–

sin(

























ω = 2π × fLINE/fDSP

where:

fLINE is the line frequency.

fDSP = 4 kHz.

Voltage Channel

The ADE9153A has a single voltage channel with the datapath

shown in Figure 44. The AVGAIN register calibrates the voltage

channel and has the same scaling as the xIGAIN registers.

RMS and Power Measurements

The ADE9153A calculates total values of rms current, rms voltage,

active power, fundamental reactive power, and apparent power.

The algorithm for computing the fundamental reactive power

requires initialization of the network frequency using the

SELFREQ bit in the ACCMODE register and the nominal

voltage in the VLEVEL register.

Calculate the VLEVEL value according to the following

equation:

VLEVEL = x × 1,444,084

where x is the dynamic range of the nominal voltage input

signal with respect to full scale.

For example, if the signal is at ½ of full scale, x = 2. Therefore,

VLEVEL = 2 × 1,444,084

Total RMS

The ADE9153A offers total current and voltage rms measurements

on all channels. Figure 45 shows the datapath of the rms

measurements.

xRMS_OS

xRMS

–0.064%

+0.064%

AV_WAV OR xI_WAV

VOLTAGE OR CURRENT

CHANNELWAVEFORM

LPF2

52725703

Figure 45. Filter-Based Total RMS Datapath

The total rms calculations, one for each channel (AIRMS,

BIRMS, and AVRMS), are updated every 4 kSPS. The xIRMS

value at full scale is 52,725,703 codes. The xVRMS value at full

scale is 26,362,852 codes. The total rms measurements can be

calibrated for gain and offset. Perform gain calibration on the

respective Current A voltage channel datapath with the xGAIN

registers. The following equation indicates how the offset

calibration registers modify the result in the corresponding

rms registers:

xRMS =

xRMOS

xRMS





where xRMS0 is the initial xRMS register value before offset

calibration.

Total Active Power

The ADE9153A offers a total active power measurement. The

datapath for the total active power measurement is shown in

Figure 46.

APGAIN

AWATT_OS

AWATT

LPF2

CONFIG0.

DISAPLPF

AI_WAV

AV_WAV

ENERGY/

POWER/

CF ACCUMULATION

Figure 46. Total Active Power (AWATT) Datapath

ADE9153AACPZ датащи(PDF) 23 Page - Analog Devices

ADE9153AACPZ датащи(HTML) 23 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

датащи скачать

ссылки URL