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參數資料
| 型號： | 71M6513H-IGT/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 封裝： | LEAD FREE, LQFP-100 |
| 文件頁數： | 49/104頁 |
| 文件大?。?/td> | 1390K |
| 代理商： | 71M6513H-IGT/F |
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71M6513/71M6513H
3-Phase Energy Meter IC
DATA SHEET
SEPTEMBER 2011
2005-2011 Teridian Semiconductor Corporation
Page: 49 of 104
A Maxim Integrated Products Brand
FUNCTIONAL DESCRIPTION
Theory of Operation
The energy delivered by a power source into a load can be expressed as:
∫
=
t
dt
t
I
t
V
E
0
)
(
)
(
Assuming phase angles are constant, the following formulae apply:
P = Real Energy [Wh] = V * A * cos φ* t
Q = Reactive Energy [VARh] = V * A * sin φ * t
S = Apparent Energy [VAh] =
2
Q
P
+
For a practical meter, not only voltage and current amplitudes, but also phase angles and harmonic content may change
constantly. Thus, simple RMS measurements are inherently inaccurate. A modern solid-state electricity meter IC such as the
71M6513/6513H functions by emulating the integral operation above, i.e. it processes current and voltage samples through an
ADC at a constant frequency. As long as the ADC resolution is high enough and the sample frequency is beyond the harmonic
range of interest, the current and voltage samples, multiplied with the time period of sampling will yield an accurate quantity for
the momentary energy. Summing up the momentary energy quantities over time will result in accumulated energy.
Figure 12: Voltage. Current, Momentary and Accumulated Energy
Figure 12 shows the shapes of V(t), I(t), the momentary energy and the total accumulated energy, resulting from 50 samples
of the voltage and current signals over a period of 20ms. The application of 240VAC and 100A results in an accumulation of
480Ws over the 20ms period, as indicated by the curve for Accumulated Energy.
The described sampling method works reliably, even in the presence of dynamic phase shift and harmonic distortion.
-500
-400
-300
-200
-100
0
100
200
300
400
500
0
5
10
15
20
time [ms]
V
[V],
I
[A
],
P
[W
s
]
Current [A]
Voltage [V]
Energy per Interval [Ws]
Accumulated Energy [Ws]
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 71M6513H-IGTR/F | 功能描述:計量片上系統(tǒng) - SoC 3-Phase Energy Meter I/C RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型:Metering SoC 最大時鐘頻率:70 Hz 程序存儲器大小:64 KB 數據 RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數量:12 片上 ADC: 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6513H-IGTR/F1 | 功能描述:計量片上系統(tǒng) - SoC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型:Metering SoC 最大時鐘頻率:70 Hz 程序存儲器大小:64 KB 數據 RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數量:12 片上 ADC: 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6513-IEL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:71M6513 |
| 71M6513-IEL/F | 功能描述:計量片上系統(tǒng) - SoC 3-Phase Energy Meter I/C RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型:Metering SoC 最大時鐘頻率:70 Hz 程序存儲器大小:64 KB 數據 RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數量:12 片上 ADC: 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6513-IELR/F | 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC 3-Phase Energy Meter I/C |
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