Designing An Open-Source Power Inverter (Part 19): Controller Design For The Battery Converter
by Dennis Feucht, Innovatia Laboratories, Cayo, Belize, How2Power Today, Sep 13 2024
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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