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User Manuals: ST AN4070 Microinverter
Manuals and User Guides for ST AN4070 Microinverter. We have
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ST AN4070 Microinverter manual available for free PDF download: Application Note
ST AN4070 Application Note (53 pages)
250 W grid connected microinverter
Brand:
ST
| Category:
Control Unit
| Size: 4 MB
Table of Contents
Figure 1. Image of the 250 W MIC
1
Table of Contents
2
1 System Description
5
Figure 2. Block Scheme of the 250 W Grid Connected System
5
2 DC-DC Converter Design
7
Figure 3. DC-DC Converter Topology
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Figure 4. Gate Driving Signals of the DC-DC Converter
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Figure 5. Currents through the Input Inductors
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Figure 6. MOSFET MOS1 and MOS2 Currents
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Figure 7. Rectifier Diode Currents
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Figure 8. HF Transformer Current
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Table 3. DC-DC Converter MOSFET Main Characteristics
13
Table 4. DC-DC Converter Rectifier Diodes Main Characteristics
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Table 5. HF Transformer Specifications
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Table 6. RM14 Core with N87 Ferrite Main Characteristics
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Figure 9. Basic Scheme of the DC-AC Converter
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Table 7. STB11N65M5 MOSFET Main Electrical Characteristics
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3 Schematic Description
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Figure 10. Schematic of the Two Main Power Stages
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Figure 11. Schematic of the Filtering and Relay Circuit
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Figure 12. DC-DC Converter Driver
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Figure 13. DC-AC Converter Driver
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Figure 14. Auxiliary Power Supply of the Demonstration Board
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Figure 15. AC Line Current Sensing
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Figure 16. AC Line Voltage Sensing
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Figure 17. PV Current Sensing
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Figure 18. PV Voltage Sensing
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4 Stm32F103Xx Based Current Control for Inverter Grid Connection
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Figure 19. Block Diagram of the Implemented Control
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Figure 20. Implemented PLL Structure
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Figure 21. Block Diagram of the Control Algorithm Implemented on the 250 W MIC Stm32F103Xx
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5 Experimental Test Results
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Figure 23. DC-DC Converter Input Current Ripple Cancellation and Inductor Currents
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Figure 24. DC-DC Converter HF Transformer Waveforms
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Figure 25. DC-DC Converter Rectifier Diode Waveforms
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Figure 26. Inverter Modulating Signals
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Figure 27. DC-AC Converter Output Voltage and Current Waveforms
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Figure 28. DC-DC Converter Efficiency
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Figure 29. Microinverter Efficiency
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Figure 30. MIC Output Current and Voltage Waveforms During Grid Connection
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Figure 31. Output Current THD
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Figure 32. Power Factor
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Appendix A Magnetic Components Datasheets
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Figure 33. DC-DC Boost Converter Inductors (Part1)
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Figure 34. DC-DC Boost Converter Inductors (Part2)
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Figure 35. AC Voltage TV
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Figure 36. DC-DC Converter HF Transformer (Part 1)
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Figure 37. DC-DC Converter HF Transformer (Part 2)
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Figure 38. Inverter Filter Inductor (Part 1)
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Figure 39. Inverter Filter Inductor (Part 2)
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Appendix B Alternative DC-DC Converter Magnetic Components with Low
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Profile
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Figure 40. DC/DC Inductor for 250 W Microinverter
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Figure 41. DC-DC Transformer for 250 W Microinverter
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6 Conclusions
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Revision History
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Document Revision History
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