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

2.4 Split-Phase Hybrid Inverter

Split-phase hybrid inverter is specially designed to split the single-phase power output into two separate phases. This is usually for where the grid supports split phase, such as in North America (115V/230V) and Japan (100V/200V) market. The split-phase inverter has the same demand of unbalanced loads output as the 3-phase hybrid inverter does. Figure 2-8 shows the typical split-phase hybrid inverter block diagram with Hall-effect Current Sensors.

Split-phase Hybrid Inverter Block Diagram with Hall-effect Current Sensors Figure 2-8 Split-phase Hybrid Inverter Block Diagram with Hall-effect Current Sensors

Figure 2-9 shows the HERIC inverter with the fourth-leg (also known as balancing bridge) to actively control the midpoint voltage that allows the inverter to support split-phase (unbalanced loads) output.

Balancing Bridge Design for Midpoint Potential Balancing in Split-Phase Inverter Figure 2-9 Balancing Bridge Design for Midpoint Potential Balancing in Split-Phase Inverter