- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373980 > ADE7754AR (ANALOG DEVICES INC) ADE7754 PDF資料下載
參數(shù)資料
| 型號： | ADE7754AR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | ADE7754 |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | MS-013AD, SOIC-24 |
| 文件頁數(shù)： | 26/44頁 |
| 文件大小： | 630K |
| 代理商： | ADE7754AR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁當前第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
REV. PrG 01/03
PRELIMINARY TECHNICAL DATA
ADE7754
–
26
–
Important:
As the phase shift applied on the current channel
is not -90
o
as it should be ideally, the reactive power
calculation done in the ADE7754 cannot be used directly for
the reactive power calculation. Consequently, it is recom-
mended to use the ADE7754 reactive power measurement
only to get the sign of the reactive power. The reactive power
can be processed using the power triangle method.
1
HPF
24
LPF
Instantaneous Reactive
Power Signal - p(t)
MULTIPLIER
Reactive Power
Signal - P
I
V
28
-89
o
Figure 30 - Reactive Power Signal Processing
TOTAL REACTIVE POWER CALCULATION
The sum of the Reactive powers coming from each phase
gives the Total Reactive Power consumption. Different
combinations of the three phases can be selected in the sum
by setting bits 7-6 of the WATMode register (mnemonic
WATMOD[1:0]). Each term of the formula can be disabled
or enabled by the LWATSEL bits of the WATMode register.
It should be noticed that in this mode, the LWATSEL bits
are also used to select the terms of the LVAENERGY
register. The different configurations are described in Table
III.
The accumulation of the Reactive Power in the LAENERGY
register is different from the accumulation of the Active
Power in the LAENERGY register. Under the same signal
conditions (e.g. Current and voltage channels at full scale),
if the accumulation of the active power with PF = 1 during
1 second is Wh
1
and the accumulation of the reactive power
with PF = 0 during the same time is VARh
1
, then Wh
1
=
9.546 x VAR
1
.
Note:
I
A*
, I
B*
and I
C*
represent the current channels samples
after APGAIN correction, High-Pass Filtering and -89
o
phase shift in the case of Reactive Energy accumulation.
Reactive Energy accumulation selection
The ADE7754 accumulates the Total Reactive Power signal
in the LAENERGY register for an integer number of half
cycles, as shown in Figure 29. This mode is selected by
setting to logic one bit5 of the WAVMode register (Add.
0Ch). When this bit is set the accumulation of the Active
Energy over half line cycles in the LAENERGY register is
disabled and is done instead in the LVAENERGY register.
In this mode, the accumulation of the Apparent Energy over
half line cycles in the LVAENERGY is no-longer available
-
See Figure 31
.
Active Power
Reactive Power
Apparent Power
0
LVAENERGY
Register
Bit5 WAVMode
Register
LAENERGY
Register
0
1
1
Figure 31 - Selection of Reactive energy accumulation
The features of the Reactive Energy accumulation are the
same as the Line Active Energy accumulation:
Each one of three phases zero-crossing detection can contrib-
ute to the accumulation of the half line cycles. Phase A, B and
C zero crossings are respectively taken into account when
counting the number of half line cycles by setting to logic one
bits 4-6 of the MMODE register. Selecting phases for the
Zero crossing counting has also the effect of enabling the
Zero-crossing detection, Zero-crossing Time-Out and Pe-
riod Measurement for the corresponding phase as described
int he Zero-crossing Detection paragraph.
The number of half line cycles is specified in the LINCYC
register. LINCYC is an unsigned 16-bit register. The
ADE7754 can accumulate Active Power for up to 65535
combined half cycles. At the end of an energy calibration
cycle the LINCYC flag in the Interrupt Status register is set.
If the LINCYC mask bit in the Interrupt Mask register is
enabled, the
IRQ
output will also go active low. Thus the
IRQ
line can also be used to signal the end of a calibration.
As explained in the Reactive Power paragraph, the purpose
of the reactive Energy calculation in the ADE7754 is not to
give an accurate measurement of this value but to to provide
the sign of the the reactive energy. The ADE7754 provides
an accurate measurement of the Apparent Energy. As the
active energy is also measured in the ADE7754, a simple
mathematical formula can be used to extract the Reactive
energy. The evaluation of the sign of the Reactive Energy
makes up the calculation of the Reactive Energy.
Reactive
Reactive
Energy
(
sign
Power
Apparent Energy
Active E
=
)
×
2
nergy
2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADE7754ARRL | ADE7754 |
| ADE7755AN-REF | Energy Metering IC with Pulse Output |
| ADE7755ARSRL | Energy Metering IC with Pulse Output |
| ADE7755 | Energy Metering IC with Pulse Output |
| ADE7755ARS | Energy Metering IC with Pulse Output |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADE7754ARRL | 制造商:Analog Devices 功能描述:Energy Measurement 24-Pin SOIC W T/R 制造商:Rochester Electronics LLC 功能描述:THREE PHASE ENERGY METER IC W/WATT & VA - Bulk |
| ADE7754ARZ | 功能描述:IC ENERGY METERING 3PHASE 24SOIC 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 標準包裝:2,500 系列:* |
| ADE7754ARZRL | 功能描述:IC ENERGY METERING 3PHASE 24SOIC 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 標準包裝:2,500 系列:* |
| ADE7755 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Energy Metering IC with Pulse Output |
| ADE7755AARSRL | 制造商:Analog Devices 功能描述:ENERGY METERING IC WITH P - Tape and Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。