Designing An Open-Source Power Inverter (Part 19): Controller Design For The Battery Converter

Focus:

This article explores the design of the control circuit of the boost push-pull (BPP) power- transfer circuit in the battery converter stage of the Volksinverter power inverter. It begins an explanation of control circuit design by observing how low output-voltage and output-current conditions on the battery converter’s output port complicate converter control. Then, it addresses these requirements by applying a combination of operating modes, and derives the control logic needed to implement these two modes. Based on those logic requirements, a particular control scheme is recommended. Finally, the various exceptions to the normal controller operating modes are described.

What you’ll learn:

• How to understand the advantages of a boost-push pull over a buck push-pull power transfer circuit in a power inverter application
• How to understand the benefits and operation of an extended boost push-pull power transfer circuit, which operates in both boost and buck modes
• How to design the control logic for the battery converter stage in a power inverter

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Author & Publication:

Dennis Feucht, Innovatia Laboratories, Cayo, Belize, How2Power Today, Sep 13 2024

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