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参数资料
| 型号： | ADE7569ASTZF16 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 60/136页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER MCU 16K 64LQFP |
| 标准包装： | 1 |
| 输入阻抗： | * |
| 测量误差： | * |
| 电压 - 高输入/输出： | * |
| 电压 - 低输入/输出： | * |
| 电流 - 电源： | * |
| 电源电压： | * |
| 测量仪表类型： | * |
| 工作温度： | * |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 托盘 |
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ADE7566/ADE7569
APPARENT POWER CALCULATION
Apparent power is defined as the maximum power that can be
delivered to a load. V rms and I rms are the effective voltage and
current delivered to the load, respectively. Therefore, the apparent
power (AP) = V rms × I rms . This equation is independent from the
Preliminary Technical Data
The gain of the apparent energy can be adjusted by using the
multiplier and by writing a twos complement, 12-bit word to the
VAGAIN register (VAGAIN[11:0]). Equation 32 shows how the
gain adjustment is related to the contents of the VAGAIN register.
Output VAGAIN =
? Apparent Power × ? 1 +
? ?
phase angle between the current and the voltage.
Equation 31 gives an expression of the instantaneous power
? ?
? ?
VAGAIN ? ?
2 12 ? ?
(32)
signal in an ac system with a phase shift.
For example, when 0x7FF is written to the VAGAIN register, the
v ( t ) = 2 V rms sin( ω t )
i ( t ) = 2 I rms sin( ω t + θ )
p ( t ) = v ( t ) × i ( t )
p ( t ) = V rms I rms cos( θ ) ? V rms I rms cos( 2 ω t + θ )
(28)
(29)
(30)
(31)
power output is scaled up by 50% (0x7FF = 2047d, 2047/2 12 = 0.5).
Similarly, 0x800 = –2047d (signed twos complement) and power
output is scaled by –50%. Each LSB represents 0.0244% of the
power output. The apparent power is calculated with the current
and voltage rms values obtained in the rms blocks of the
ADE7566/ADE7569.
Figure 62 illustrates the signal processing for the calculation of
the apparent power in the ADE7566/ADE7569.
The apparent power signal can be read from the waveform register
by setting the WAVMODE Register (0x0D) and setting the
WFSM bit in the Interrupt Enable Register 3 SFR (MIRQENH,
0xDB). Like the current and voltage channel waveform sampling
modes, the waveform data is available at sample rates of 27.9
kSPS, 14 kSPS, 7 kSPS, or 3.5 kSPS.
Irms
Apparent Power Offset Calibration
Each rms measurement includes an offset compensation register to
calibrate and eliminate the dc component in the rms value (see the
Current Channel RMS Calculation section and Voltage Channel
RMS Calculation section). The voltage and current channels
rms values are then multiplied together in the apparent power
signal processing. Because no additional offsets are created in
the multiplication of the rms values, there is no specific offset
compensation in the apparent power signal processing. The
offset compensation of the apparent power measurement is
done by calibrating each individual rms measurement.
VARMSCFCON
APPARENT POWER
SIGNAL (P)
0x1A36E2
CURRENT RMS SIGNAL – i(t)
0x1CF68C
0x00
VAGAIN
Vrms
VOLTAGE RMS SIGNAL – v(t)
0x1CF68C
TO
DIGITAL-TO-FREQUENCY
CONVERTER
0x00
Figure 62. Apparent Power Signal Processing
Rev. PrA | Page 60 of 136
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相关代理商/技术参数 |
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| ADE7569ASTZF162 | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver |
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