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參數(shù)資料
| 型號： | DRM040 |
| 英文描述： | Single Phase Digital Power Meter Reference Design |
| 中文描述： | 單相電能表的數(shù)字參考設計 |
| 文件頁數(shù)： | 14/80頁 |
| 文件大小： | 1025K |
| 代理商： | DRM040 |
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Introduction
Designer Reference Manual
DRM040 — Rev 0
14
Introduction
MOTOROLA
Where:
and
By substitution and trigonometric identity the resultant equation can be
derived for instantaneous power:
Instantaneous Power:
The active (real) power is equal to the time integral (continuous
summation of the individual voltage and current product terms) of this
instantaneous power signal and since integration is similar to low-pass
filtering or averaging, the active power can be described by the equation
below, as the average value of the time varying quantity sin(2wt+ ) = 0.
This active power equation is valid for all sinusoidal waveforms.
Active Power:
However, it should be noted that all voltage and especially current
waveforms in practical applications will have some harmonic content.
This active (real) power calculation also holds true for waveforms that
contain harmonics, as explained below:
Using Fourier series expansion, instantaneous voltage and current
waveforms can be expressed as follows:
where:
is the instantaneous voltage
is the average value or DC component
is the rms value of voltage harmonic
h
is the phase angle of the voltage harmonic.
(
t
)
=
V
sin(
ω
t
)
(
t
)
=
I
sin(
ω
t
+θ
)
(
)
)
2
sin(
cos
2
)
(
θ
ω
θ
+
+
×
=
t
I
V
t
p
(
)
θ
cos
2
)
(
I
V
t
p
×
=
v
(
t
)
=
V
o
+
2
×
V
h
×
sin(
h
ω
t
+α
h
)
h
=
1
∞
(
t
)
0
h
α
h
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DRM10 | 功能描述:DIP 開關(guān)/ SIP 開關(guān) BCD 10 POS RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| DRM1004 | 功能描述:DIP 開關(guān)/ SIP 開關(guān) ROTARY DIP SWITCH PLASTICSHAFT RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| DRM101 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Blood Pressure Monitor Using the Flexis QE128 Family |
| DRM10C | 功能描述:SWITCH DIP MINI SHAFT 10POS T/H RoHS:否 類別:開關(guān) >> DIP 系列:DR 特色產(chǎn)品:RDM Series Rotary DIP Switch 標準包裝:70 系列:RDM 電路:十六進制 位置數(shù):16 觸點額定電壓:0.1A @ 42VDC 觸動器類型:用于工具旋轉(zhuǎn) 觸動器電平:凹槽式 安裝類型:通孔 方向:頂部觸動 可清洗:是 其它名稱:EG4977-5RDMAR16PIT |
| DRM10C04 | 功能描述:編碼式波段開關(guān) SW DIP MINI SHAFT 10POS T/H RoHS:否 制造商:C&K Components 位置數(shù)量:10 輸出代碼:Binary Coded Decimal 執(zhí)行器:Screwdriver 觸點額定值: 端接類型:Solder Pin 封裝:Tube |
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