SBOA624 March   2025 TMCS1123 , TMCS1126 , TMCS1127 , TMCS1133

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Solar Application Scenarios with Hall-effect Current Sensing
    1. 2.1 String Inverter
      1. 2.1.1 String Current Sampling
      2. 2.1.2 Arc Current Detection (Optional)
      3. 2.1.3 MPPT Boost Current Sampling
      4. 2.1.4 3-Phase Current Sampling
    2. 2.2 Single-Phase Residential Inverter
    3. 2.3 3-Phase Hybrid Inverter
      1. 2.3.1 BDC Current Sampling
      2. 2.3.2 Off-Grid EPS 3-Phase Current Sampling
      3. 2.3.3 Neutral Current Sampling for Midpoint Potential Balancing
    4. 2.4 Split-Phase Hybrid Inverter
    5. 2.5 Micro Inverter
    6. 2.6 Solar Power Optimizer
    7. 2.7 Smart Combiner Box of Central Inverter
    8. 2.8 Summary of Solar Inverter System and In-package Hall-effect Current Sensor
  6. 3Summary
  7. 4References

2.1 String Inverter

String inverter is usually three-phase inverter deployed in commercial-industrial system and utility system. The power level is usually larger than 50KW. Figure 2-1 shows the typical 3-phase string inverter block diagram with hall-effect current sensors used to measure the following currents.

  • String current sampling.
  • Arc current detection (optional).
  • MPPT Boost current sampling.
  • three-phase current sampling.
3-phase String Inverter Block Diagram with Hall-effect Current Sensors Figure 2-1 3-phase String Inverter Block Diagram with Hall-effect Current Sensors