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Introduction

Engineer(s):

Andrew Chai Kenny Na Megan Lee Santosh Erathasari

Background:

Unarchived project from the 2024 PDB 12S PDB

A power distribution board (PDB) is used for supplying and distributing power form the main power supply to various circuits and subsystems. In a drone/UAV context, the PDB is responsible for converting and distributing the battery pack voltage to the several electronics on the drone itself.

Reference COTS PDBs:

https://holybro.com/products/pm03d-power-module?pr_prod_strat=e5_desc&pr_rec_id=eefeb6967&pr_rec_pid=7192462491837&pr_ref_pid=7408912400573&pr_seq=uniform

https://holybro.com/products/pixhawk-4-power-module-pm07?pr_prod_strat=e5_desc&pr_rec_id=096753d49&pr_rec_pid=7150469939389&pr_ref_pid=7192462491837&pr_seq=uniform

What:

  • Handle 12S input range (40V-50V)

  • 12V & 5V output rails with sufficient current output for downstream electronics

    • Common voltage rails

    • Standard connector

  • Reverse Polarity Protection (RPP)

  • Voltage + Current Sense → maybe need CAN adapter circuit??

    • high current passthrough (may be difficult if this is taking in the entire bus current)

    • might be nice to have a discrete implementation of this, as well as I-sense for each rail

  • Redundancy Support (having just one supply rail makes the system single fault susceptible)

  • Proper input + output filtering networks (need to avoid resonant frequency of Li-Po batteries)

  • High efficiency power conversion system

    • Can try playing around with different ways to optimize for efficiency ie soft switching, IC selection

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