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參數資料
| 型號： | 71M6532F-IGTR/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP100 |
| 封裝： | LEAD FREE, LQFP-100 |
| 文件頁數： | 71/120頁 |
| 文件大?。?/td> | 2477K |
| 代理商： | 71M6532F-IGTR/F |
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Data Sheet 71M6531D/F-71M6532D/F
FDS 6531/6532 005
54
2005-2010 TERIDIAN Semiconductor Corporation
v1.3
2
Functional Description
2.1
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 Teridian 71M6531 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 18: Voltage, Current, Momentary and Accumulated Energy
Figure 18 shows the shapes of V(t), I(t), the momentary power and the accumulated power, resulting from
50 samples of the voltage and current signals over a period of 20 ms. The application of 240 VAC and 100 A
results in an accumulation of 480 Ws (= 0.133 Wh) over the 20 ms period, as indicated by the accumulated
power curve. 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
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 |
|---|---|
| 71M6533 | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Energy Meter IC |
| 71M6533-DB | 功能描述:開發(fā)板和工具包 - 8051 71M6533 Demo Brd RoHS:否 制造商:Silicon Labs 產品:Development Kits 工具用于評估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓: |
| 71M6533G | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Exceeds IEC 62053/ANSI C12.20 Standards |
| 71M6533G-IGTR/F | 功能描述:計量片上系統(tǒng) - SoC AC Power Monitoring SoC-Programd 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 |
| 71M6533H | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Energy Meter IC |
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