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Novel Current Sensor Schneider Electric

Geoff Bennett Miles Hancock Drew Jennings. Novel Current Sensor Schneider Electric . General Description. Problem Description Novel Current Sensor Transmission Line Application Design Specifications Coreless Isolated Detection Deliverables AC Current Sensor Sensor Designs

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Novel Current Sensor Schneider Electric

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  1. Geoff Bennett Miles Hancock Drew Jennings Novel Current Sensor Schneider Electric

  2. General Description • Problem Description • Novel Current Sensor • Transmission Line Application • Design Specifications • Coreless • Isolated Detection • Deliverables • AC Current Sensor • Sensor Designs • Testing Data

  3. Literature Review Current Technologies Rogowski Coil Hall Effect Sensor

  4. Decision Matrix

  5. GMR Technology • Emerging Technology • Used in Hard Drives • Recently Commercially Available • Proven in other applications • So How Does it work?

  6. GMR Technology Electron Spin direction changes in the direction of the applied magnetic field

  7. GMR Technology http://mrsec.wisc.edu/Edetc/IPSE/educators/activities/gmr.html

  8. GMR Technology R1(GMR)

  9. Conceptual Design • EMI Shielding • Physical layout of GMR’s • GMR biasing with current trace

  10. 1 2 3 4 5 7 8 a1 a2 a3 a4 b1 8 b3 b4 b2 6 1 2 5 3 4 7 b2 6 a2 a3 a4 b1 b3 a1 1 2 3 4 5 6 b4 8 a1 a2 a3 a4 b1 b2 b3 b4 7 GMR GMR GMR Flux Collector Flux Collector GMR Flux Collector Flux Collector GMR Flux Collector Flux Collector GMR Conductor runs on top of GMR's. This is designated by the doted lines. Current Bias

  11. Conceptual Design • True RMS calculation • Real-time digital filtering • Hysteresis calibration Digital Signal Processing

  12. Hysteresis curve http://www.ifw-dresden.de/institutes/imw/sections/26/magnetic-films-folder/hard-magnetic-films/nd-fe-b-films

  13. Instrumentation Amplifier

  14. Management Schedule

  15. Rogowski Coil Hall Effect MEMS Bill of Materials Part Ordering GMR Faraday Effect Radical Ideas Timeline Physical Design Filter Design Noise Correct Magnetometers Signal Analysis Idea Matrix Miles Hancock Geoff Bennett Drew Jennings

  16. Development Costs

  17. Development Costs: $789.01 Production Cost: $256.63

  18. Conclusions • Why is it a good design? • Cost, Safety, Size, Installation, Accuracy • Additional Functionality • Power Calculation • Very High Current Systems Production Cost: $256.63

  19. Current prototype GMR Applied Field

  20. Current prototype

  21. 1 2 3 4 5 7 8 a1 a2 a3 a4 b1 8 b3 b4 b2 6 1 2 5 3 4 7 b2 6 a2 a3 a4 b1 b3 a1 1 2 3 4 5 6 b4 8 a1 a2 a3 a4 b1 b2 b3 b4 7 GMR GMR GMR Flux Collector Flux Collector GMR Flux Collector Flux Collector GMR Flux Collector Flux Collector GMR Conductor runs on top of GMR's. This is designated by the doted lines. Current Bias

  22. 1 2 3 4 5 7 8 a1 a2 a3 a4 b1 8 b3 b4 b2 6 1 2 5 3 4 7 b2 6 a2 a3 a4 b1 b3 a1 1 2 3 4 5 6 b4 8 a1 a2 a3 a4 b1 b2 b3 b4 7 GMR GMR GMR Flux Collector Flux Collector GMR Flux Collector Flux Collector GMR Flux Collector Flux Collector GMR Conductor runs on top of GMR's. This is designated by the doted lines. Current Bias

  23. Questions

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