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参数资料
| 型号： | ADE7878ACPZ |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | Poly Phase Multifunction Energy Metering IC With Total And Fundamental Powers, No Of Pins: 40, Temperature Range: Ind |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, QCC40 |
| 封装： | 6 X 6 MM, ROHS COMPLIANT, MO-220WJJD, LFCSP-40 |
| 文件页数： | 48/96页 |
| 文件大小： | 1096K |
| 代理商： | ADE7878ACPZ |
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ADE7854/ADE7858/ADE7868/ADE7878
Rev. E | Page 52 of 96
This discrete time accumulation or summation is equivalent to
integration in continuous time following the expression in
Equation 37:
Bit 2 (REHF) in the STATUS0 register is set when Bit 30 of
one of the xVARHR registers changes, signifying one of these
registers is half full. If the reactive power is positive, the var-hour
register becomes half full when it increments from 0x3FFF FFFF
to 0x4000 0000. If the reactive power is negative, the var-hour
register becomes half full when it decrements from 0xC000 0000
to 0xBFFF FFFF. Analogously, Bit 3 (FREHF) in the STATUS0
register is set when Bit 30 of one of the xFVARHR registers
changes, signifying one of these registers is half full.
()
×
=
∑
∫
∞
=
→
0
T
Lim
n
T
nT
q
dt
t
q
ergy
ReactiveEn
(37)
where:
n is the discrete time sample number.
T is the sample period.
Setting Bits[3:2] in the MASK0 register enable the FREHF and
REHF interrupts, respectively. If enabled, the IRQ0 pin is set
low and the status bit is set to 1 whenever one of the energy
registers, xVARHR (for REHF interrupt) or xFVARHR (for
FREHF interrupt), becomes half full. The status bit is cleared
and the IRQ0 pin is set to high by writing to the STATUS0
register with the corresponding bit set to 1.
On the ADE7858/ADE7868/ADE7878, the total phase reactive
powers are accumulated in the AVARHR, BVARHR, and
CVARHR 32-bit signed registers. The fundamental phase reactive
powers are accumulated in the AFVARHR, BFVARHR, and
CFVARHR 32-bit signed registers. The reactive energy register
content can roll over to full-scale negative (0x80000000) and
continue increasing in value when the reactive power is positive.
Conversely, if the reactive power is negative, the energy register
underflows to full-scale positive (0x7FFFFFFF) and continues
to decrease in value.
Setting Bit 6 (RSTREAD) of the LCYCMODE register enables a
read-with-reset for all var-hour accumulation registers, that is,
the registers are reset to 0 after a read operation.
AVGAIN
HPFDIS
[23:0]
HPF
AIGAIN
HPFDIS
[23:0]
DIGITAL
INTEGRATOR
REVRPA BIT IN
STATUS0[31:0]
HPF
VA
IA
AVARGAIN
AVAROS
APHCAL
ACCUMULATOR
VARTHR[47:0]
AVARHR[31:0]
32-BIT
REGISTER
TOTAL
REACTIVE
POWER
ALGORITHM
08
51
0-
2
45
DIGITAL SIGNAL PROCESSOR
24
AVAR
Figure 66. Total Reactive Energy Accumulation
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相关代理商/技术参数 |
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|---|---|
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| ADE7880ACPZ | 功能描述:IC ENERGY METERING 3PH 40LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:* |
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