SPRAD58A September   2022  – February 2023 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1 , UCC14130-Q1 , UCC14131-Q1 , UCC14140-Q1 , UCC14141-Q1 , UCC14240-Q1 , UCC14241-Q1 , UCC14340-Q1 , UCC14341-Q1 , UCC15240-Q1 , UCC15241-Q1 , UCC5870-Q1 , UCC5871-Q1 , UCC5880-Q1

 

  1.   Abstract
  2. 1 Introduction
  3. 2 Architectures and Trends
  4. 3 Key Technology to Enable Traction Inverters
  5. 4 Microcontroller
    1. 4.1 Sitara Family
    2. 4.2 C2000 Family
  6. 5 Isolated Gate Drivers
  7. 6 Low-Voltage Bias Supplies
  8. 7 High-Voltage Bias, Redundant Supply
  9. 8 DC Link Active Discharge
  10. 9 Motor Position Sensing
  11. 10Isolated Voltage and Current Sensing
  12. 11System Engineering and Reference Designs
  13. 12Conclusion
  14. 13References

10 Isolated Voltage and Current Sensing

Traction inverter systems use isolated sensors for voltage and current measurements such as DC link voltages and motor phase currents. TI’s AMC1311B-Q1 and AMC1351-Q1 isolated amplifiers and AMC1305-Q1 isolated-modulator-based designs help to achieve high accuracy, high bandwidth, low latency, and low temperature drift for isolated current and voltage sensing. The product family offers both basic and reinforced isolation ratings. The silicon dioxide-based capacitive isolation barrier supports a high level of magnetic field immunity.