Extended Current and Voltage Measurement Using Shunts for Protection Relays Reference Design
Description
This reference design demonstrates a unique approach for extending current measurement range using a single shunt and voltage measurement AMC1304Mx5 isolated delta-sigma (ΔΣ) modulator. With careful selection of a low-value shunt resistor that minimizes power dissipation: a front-end amplifier with low noise and by introducing two gain paths: both upper and lower current limit is extended. Accuracy of
Features
- Single-phase voltage and current measurement (shunt based) using isolated delta-sigma modulator (AMC1304Mx5)Measurement accuracy:AC current: AC voltage: AFE interfaced to host MCU (AM437x Sitara™ ARM® Cortex®-A9 processor) which performs Sinc3 digital filtering using PRU-ICSSOnboard isolated ± 2.5-V and +5.0-V Power supply for AMC1304Mx5 and OPA188 using transformer driver and LDOsDesigned to work from 0.1 A to 60 A (In = 1 A) and can be extended for wider range (In = 5 A) by changing shunt and gain values.
Applications
- Oscilloscopes & digitizers
- Process analytics
- Lab & field Instrumentation
- Automotive test
- Central inverter
- Laser distance meter
- DC fast charging station
- Power conversion system (PCS)
- Radar
- Programmable DC power supply
- Battery cell formation & test equipment
- AC analog input module
- Processor module
- DC fast charging power module
- Substation automation
- Circuit breaker (ACB
- MCCB
- VCB)
Product Categories
- Isolation
| Download the bill of materials for TIDA-00738 | Download |
| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| TIDA-00738 Gerber | 14 Dec 2015 | ZIP | 330 | |
| TIDA-00738 CAD | 14 Dec 2015 | ZIP | 2563 | |
| TIDA-00738 PCB | 14 Dec 2015 | 3666 | ||
| TIDA-00738 Fabrication Drawing | 14 Dec 2015 | 910 | ||
| TIDA-00738 Assembly Drawing | 14 Dec 2015 | 505 | ||
| TIDA-00738 BOM | 14 Dec 2015 | 276 | ||
| TIDA-00738 Schematic and Block Diagram | 14 Dec 2015 | 1107 |