收藏本站
ADE7768
Nonsinusoidal Voltage and Current
The real power calculation method also holds true for non-
sinusoidal current and voltage waveforms. All voltage and
current waveforms in practical applications have some
harmonic content. Using the Fourier transform, instantaneous
voltage and current waveforms can be expressed in terms of
their harmonic content.
ANALOG INPUTS
Channel V1 (Current Channel)
The voltage output from the current sensor is connected to the
ADE7768 here. Channel V1 is a fully differential voltage input.
V1P is the positive input with respect to V1N.
The maximum peak differential signal on Channel V1 should
be less than ±30 mV (21 mV rms for a pure sinusoidal signal)
v ( t ) = V 0 + 2 × ∑ V h × sin ( hω t + α h )
∞
h ≠ 0
(2)
for specified operation.
V1
where:
+30mV
V1P
v(t) is the instantaneous voltage.
V 0 is the average value.
V CM
DIFFERENTIAL INPUT
± 30mV MAX PEAK
V1
V1N
V CM
i ( t ) = I O + 2 × ∑ I h × sin ( h ω t + β h )
V h is the rms value of voltage harmonic h.
α h i s the phase angle of the voltage harmonic.
∞
h ≠ o
(3)
–30mV
COMMON-MODE
± 6.25mV MAX
AGND
Figure 18. Maximum Signal Levels, Channel V1
where:
i(t) is the instantaneous current.
I 0 is the dc component.
I h is the rms value of current harmonic h.
β h is the phase angle of the current harmonic.
Using Equations 2 and 3, the real power (P ) can be expressed in
terms of its fundamental real power (P 1 ) and harmonic real
power (P H ) as P = P 1 + P H
where:
Figure 18 shows the maximum signal levels on V1P and V1N.
The maximum differential voltage is ±30 mV. The differential
voltage signal on the inputs must be referenced to a common
mode, such as AGND. The maximum common-mode signal is
±6.25 mV.
Channel V2 (Voltage Channel)
The output of the line voltage sensor is connected to the device
at this analog input. Channel V2 is a fully differential voltage
input with a maximum peak differential signal of ±165 mV.
Figure 19 shows the maximum signal levels that can be
P 1 = V 1 × I 1 cos φ 1
(4)
connected to the ADE7768 Channel V2.
φ 1 = α 1 ? β 1
+165mV
V2
P H = ∑ V h × I h h
and
∞
h ≠ 1
cos φ
(5)
V CM
DIFFERENTIAL INPUT
± 165mV MAX PEAK
COMMON-MODE
± 25mV MAX
V2
V CM
V2P
V2N
φ h = α h ? β h
In Equation 5, a harmonic real power component is generated
for every harmonic, provided that harmonic is present in both
the voltage and current waveforms. The power factor calcul-
–165mV
AGND
Figure 19. Maximum Signal Levels, Channel V2
ation has previously been shown to be accurate in a pure
sinusoid. Therefore, the harmonic real power must also
correctly account for the power factor, because it is made up
of a series of pure sinusoids.
Note that the input bandwidth of the analog inputs is 7 kHz at
the nominal internal oscillator frequency of 450 kHz.
Channel V2 is usually driven from a common-mode voltage,
that is, the differential voltage signal on the input is referenced
to a common mode (usually AGND). The analog inputs of the
ADE7768 can be driven with common-mode voltages of up to
25 mV with respect to AGND. However, best results are
achieved using a common mode equal to AGND.
Rev. A | Page 11 of 20
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ADE7769ARZ-RL IC ENERGY METERING 1PHASE 16SOIC
ADM8843ACPZ-REEL7 IC LED DRVR WHITE BCKLGT 16LFCSP
ADP1653ACPZ-R7 IC LED DRVR PHOTO FLASH 16-LFCSP
ADP1712-EVALZ BOARD EVALUATION ADP1712
ADP1720-EVALZ BOARD EVAL FOR ADP1720-ADJ
ADP2140CPZ-REDYKIT REDYKIT 2 BOARDS ADP2140ACPZ
ADP3110AKRZ-RL IC MOSFET DRIVER DUAL 12V 8SOIC
ADP3120AJCPZ-RL IC MOSFET DRIVER DUAL 12V 8-DFN
相关代理商/技术参数
ADE7769 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with Integrated Oscillator and No-Load Indication
ADE7769AR 制造商:Analog Devices 功能描述:Energy Measurement 16-Pin SOIC N
ADE7769AR-REF 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with Integrated Oscillator and No-Load Indication
ADE7769AR-RL 制造商:Analog Devices 功能描述:Energy Measurement 16-Pin SOIC N T/R 制造商:Analog Devices 功能描述:ENERGY MEASUREMENT 16SOIC - Tape and Reel
ADE7769ARZ 功能描述:IC ENERGY METERING 1PHASE 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:*
ADE7769ARZ-RL 功能描述:IC ENERGY METERING 1PHASE 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:*
ADE7816 制造商:AD 制造商全称:Analog Devices 功能描述:Six Current Channels, One Voltage Channel
ADE7816ACPZ 功能描述:IC POWER METER 3 PHASE 40LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:*