收藏本站
ADE7755
NONSINUSOIDAL VOLTAGE AND CURRENT
The active 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 operation, instantaneous voltage
and current waveforms can be expressed in terms of their
harmonic content.
A harmonic active power component is generated for every
harmonic, provided that the harmonic is present in both the
voltage and current waveforms. The power factor calculation
previously shown is accurate in the case of a pure sinusoid;
therefore, the harmonic active power must also correctly
account for the power factor because it is made up of a series of
pure sinusoids.
v ( t ) = V O + 2 × ∑ V h × sin ( hω t + a h )
∞
h ≠ 0
where:
v(t) is the instantaneous voltage.
V O is the average voltage value.
V h is the rms value of the voltage harmonic, h.
a h is the phase angle of the voltage harmonic.
(1)
Note that the input bandwidth of the analog inputs is 14 kHz
with a master clock frequency of 3.5795 MHz.
ANALOG INPUTS
Channel 1 (Current Channel)
The voltage output from the current transducer is connected
to the ADE7755 at Channel 1. Channel 1 is a fully differential
voltage input. V1P is the positive input with respect to V1N.
∑ I h × sin( hω t + β h )
i ( t ) = I O + 2 ×
∞
h ≠ 0
(2)
The maximum peak differential signal on Channel 1 should be
less than ±470 mV (330 mV rms for a pure sinusoidal signal)
for specified operation. Note that Channel 1 has a programmable
where:
i(t) is the instantaneous current.
I O is the current dc component.
gain amplifier (PGA) with user-selectable gain of 1, 2, 8, or 16
(see Table 5). These gains facilitate easy transducer interfacing.
V1
I h is the rms value of the current harmonic, h .
β h is the phase angle of the current harmonic.
+470mV
V1P
Using Equation 1 and Equation 2, the active power (P ) can be
expressed in terms of its fundamental active power (P1) and
harmonic active power (P H ).
V CM
DIFFERENTIAL INPUT
±470mV MAX PEAK
COMMON-MODE
±100mV MAX
V1
V CM
V1N
P = P 1 + P H
(3)
–470mV
AGND
where:
P H = ∑ V h h h
P 1 is the active power of the fundamental component:
P 1 = V 1 × I 1 cosΦ 1
Φ 1 = α 1 – β 1
and
P H is the active power of all harmonic components:
∞
× I cos Φ
h ≠ 1
Figure 24. Maximum Signal Levels, Channel 1, Gain = 1
Figure 24 illustrates the maximum signal levels on V1P and
V1N. The maximum differential voltage is ±470 mV divided by
the gain selection. The differential voltage signal on the inputs
must be referenced to a common mode, for example, AGND.
The maximum common-mode signal is ±100 mV, as shown in
Figure 24.
Table 5. Gain Selection for Channel 1
Φ h = α h – β h
G1
0
0
1
1
G0
0
1
0
1
Gain
1
2
8
16
Maximum Differential Signal (mV)
±470
±235
±60
±30
Rev. A | Page 13 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
ADE7757ARNZRL IC ENERGY METERING 1PHASE 16SOIC
ADE7758ARWZRL IC ENERGY METERING 3PHASE 24SOIC
ADE7761AARSZ-RL IC ENERGY METERING 1PHASE 20SSOP
ADE7761BARSZ-RL IC ENERGY METERING 1PHASE 20SSOP
ADE7768ARZ-RL IC ENERGY METERING 1PHASE 16SOIC
ADE7769ARZ-RL IC ENERGY METERING 1PHASE 16SOIC
ADM8843ACPZ-REEL7 IC LED DRVR WHITE BCKLGT 16LFCSP
ADP1653ACPZ-R7 IC LED DRVR PHOTO FLASH 16-LFCSP
相关代理商/技术参数
ADE7755ARSZ1 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with Pulse Output
ADE7755ARSZRL 功能描述:IC ENERGY METERING 1PHASE 24SSOP 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:*
ADE7756 制造商:AD 制造商全称:Analog Devices 功能描述:Active Energy Metering IC with Serial Interface
ADE7756AN 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin PDIP
ADE7756AN-REF 制造商:AD 制造商全称:Analog Devices 功能描述:Active Energy Metering IC with Serial Interface
ADE7756ARS 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP 制造商:Analog Devices 功能描述:ENERGY METERING IC WITH SERIAL INTERFACE - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:ENERGY METERING IC WITH SERIAL INTERFACE - Bulk
ADE7756ARSRL 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP T/R 制造商:Analog Devices 功能描述:ENERGY METERING IC WITH SERIAL INTERFACE - Tape and Reel
ADE7756ARSZ 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP 制造商:Analog Devices 功能描述:PBFR ENERGYMETERICW/ SERIAL INTERFACE - Rail/Tube