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罗氏线圈电路

更新时间:2019-09-04 10:50:33 大小:2M 上传用户:kongbudaoshi111查看TA发布的资源 浏览次数:312 下载积分:2分 下载次数:1 次 标签:罗氏线圈 出售积分赚钱 评价赚积分 ( 如何评价?) 收藏 评论(0) 举报

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罗氏线圈电路,Ti 技术资料,通俗易懂。

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文件名 大小
TI-rogowski.pdf 2M

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(完整内容请下载后查看)
TI Designs  
Active Integrator for Rogowski Coil Reference Design  
With Improved Accuracy for Relays and Breakers  
Design Overview  
Design Features  
The TIDA-00777 is an op amp-based active integrator  
design that covers a wide input of current range  
measurement using a Rogowski coil with excellent  
accuracy, linearity, stability, and repeatability. The  
integrator uses a precision amplifier with very low  
offset and temperature drift. Two configurations of the  
integrator are shown: one for precision measurement  
with less than 3° phase error, and the other for fast  
response time (< 15 ms). While the output signal is  
bipolar, an optional level shifting stage can be used  
when unipolar output is required.  
Current Measurement Using Rogowski (di/dt) Coil-  
Based Current Sensor:  
0.5 to 200-A for Precision Measurement Within  
±0.5% Accuracy  
0.5 to 200 A for Fast Settling Within ±1%  
Accuracy of Final Measured Value  
Integration Achieved in Hardware With  
RC, Low-Noise Density Op Amp Based  
Integrator Design  
Parallel Paths With Low-Phase Shift Error and  
Fast Output Response Time  
Design Resources  
Phase Error < 3° for 50 and 60 Hz for  
Precision Measurement  
Design Folder  
Product Folder  
Product Folder  
Product Folder  
Product Folder  
Product Folder  
Product Folder  
Phase Error < 15° for 50 and 60 Hz for Fast  
Settling  
Op Amp Gains Designed for Integrating Rogowski  
Coil (Pulse, PA3209NL) Specification: 463 µV/A at  
50 Hz;  
556 µV/A at 60 Hz  
Operates With a Single DC Input  
AFE Output Type:  
Bipolar: VOUT = ±2.5 V  
Unipolar: VOUT = 0 to 5 V, VCM = 2.5 V  
Interfaced to MSP430F6779 Metering SoC for  
Accuracy Measurement and ADS131E08  
Featured Applications  
Protection Relays and IEDs  
Circuit Breakers  
2.5  
V
LDO  
5-V DC  
supply  
input  
V+  
(LP2951ACSD/NOPB)  
ÞVE_UNREG  
5
V
Charge pump  
(TPS60403DBV)  
Þ2.5  
V
LDO  
(TPS72325DBVT)  
VÞ  
GND  
2.5  
V
Þ2.5  
V
V+  
VÞ  
Precision measurement  
Level shifter (OPA188)  
Amplifier (OPA2188-1A)  
Active integrator (OPA2188-1B)  
Precision  
measurement  
output  
RF  
RF  
RF  
R1  
R1  
Þ
C
Þ
RI  
Rogowski  
coil output  
R2  
R3  
+V  
Þ
RI  
+V  
+
+
+V  
+
2.5  
V
Þ2.5 V  
V+  
VÞ  
Fast settling  
Level shifter (OPA188)  
Active integrator (OPA2188-1B)  
Amplifier (OPA2188-1A)  
RF  
RF  
C
Fast settling  
output  
R1  
RF  
R1  
Þ
Þ
RI  
R2  
R3  
+V  
Þ
RI  
+
+V  
+
+V  
+
5
V
GND  
Jumper  
selection  
Buffer (OPA188)  
GND  
Voltage reference  
(LM4040AIM3-2.5/NOPB)  
REF_2.5  
V
Þ
+V  
+
TIDA-00777  
© 2016, Texas Instruments Incorporated  
Copyright  
All trademarks are the property of their respective owners.  
1
September 2016  
Active Integrator for Rogowski Coil Reference Design With Improved  
Accuracy for Relays and Breakers  
Copyright © 2016, Texas Instruments Incorporated  

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