2024-10-21 TPEE (Commercial MPPT) Meeting

Questions

• R we able to flash our own algorithms

  • yes

• What kind of telemetry data

  • temperature

  • current, voltage

  • operating model

  • limits

  • curve tracing (IV curve)

• How did you follow the design process?

• Issues/challenges with the MPPT as he designed

  • Don't rush building these MPPT

  • Testing

  • Controls

  • Doing it digitally makes it prone to bugs

  • Redline → Shut off all switches

  • Current limits (control loop)

    • cascaded control loop

    • current set point in the control loop

    • done in software

  • Voltage limits

  • Keep in mind to be careful while routine to decrease capacitance → decreases

• Filter to measure frequency(?)

  • Transient frequency is at that frequency

  • control loop run faster than the resonant frequency of the LC

  • digital control loop should be fast

• Business

  • Lead time: 1-2 weeks

  • Request quotes on the website

Notes

• Efficiency

  • modeling the losses of the components

  • GaN Fets

  • optimization algorithms

• Open-source hardware

• There’s a tool that can help us view telemetry data and our own firmware

• microprocessor used: STM G4 series, high-resolution timer

• Switching frequency

  • constant

  • 40 kHz