参数资料
型号: EVAL-ADE5169EBZ-2
厂商: Analog Devices Inc
文件页数: 68/156页
文件大小: 0K
描述: BOARD EVALUATION FOR AD5169
标准包装: 1
主要目的: 电源管理,电度表/功率表
嵌入式:
已用 IC / 零件: ADE5169
主要属性: 用于汇编语言和 C 代码的 IAR 工具
次要属性: 隔离和非隔离输出选项
已供物品: 板,软件
ADE5166/ADE5169/ADE5566/ADE5569
Integration Time Under Steady Load—Reactive Energy
As mentioned in the Active Energy Calculation section, the
discrete time sample period (T) for the accumulation register is
1.22 μs (5/MCLK). With full-scale sinusoidal signals on the analog
inputs, and with the VARGAIN register (Address 0x1E) and the
VARDIV register (Address 0x25) set to 0x000, the integration time
before the reactive energy register overflows is calculated in
Equation 24.
Time =
REACTIVE ENERGY
NO LOAD
THRESHOLD
Data Sheet
0xFFFF FFFF FFFF
0xCCCCD
× 1 . 22 μ s = 409 . 6 sec = 6 . 82 min
(24)
REACTIVE POWER
When VARDIV is set to a value other than 0, the integration
time varies, as shown in Equation 25.
NO LOAD
THRESHOLD
Time = Time VARDIV = 0 × VARDIV
Reactive Energy Accumulation Modes
Var Signed Accumulation Mode
(25)
NO LOAD
THRESHOLD
The ADE5169/ADE5569 reactive energy default accumulation
mode is a signed accumulation based on the reactive power
information.
Var Antitamper Accumulation Mode
The ADE5169/ADE5569 are placed in var antitamper accumu-
lation mode by setting SAVARM (Bit 2) in the ACCMODE
register (Address 0x0F). In this mode, the reactive power is
accumulated depending on the sign of the active power. When the
active power is positive, the reactive power is added as it is to the
reactive energy register. When the active power is negative, the
reactive power is subtracted from the reactive energy accumu-
lator (see Figure 73). The CF pulse also reflects this accumulation
method when in this mode. The default setting for this mode is off.
Transitions in the direction of power flow and no load threshold
are active in this mode.
Var Absolute Accumulation Mode
The ADE5169/ADE5569 are placed in absolute accumulation
mode by setting ABSVARM (Bit 3) in the ACCMODE register
(Address 0x0F). In absolute accumulation mode, the reactive
energy accumulation is done by using the absolute reactive
power and ignoring any occurrence of power below the no load
threshold for the reactive energy (see Figure 74). The CF pulse
also reflects this accumulation method when in the absolute
accumulation mode. The default setting for this mode is off.
Transitions in the direction of power flow and no load threshold
ACTIVE POWER
NO LOAD
THRESHOLD
VARSIGN FLAG
POS NEG POS
INTERRUPT STATUS REGISTERS
Figure 73. Reactive Energy Accumulation in
Var Antitamper Accumulation Mode
REACTIVE ENERGY
NO LOAD
THRESHOLD
REACTIVE POWER
NO LOAD
THRESHOLD
Figure 74. Reactive Energy Accumulation in Absolute Accumulation Mode
are active in this mode.
Rev. D | Page 68 of 156
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