This week I worked with Deepak on the STM32 timers to trigger the ADC. We verified that indeed PWM was working and decided that we have to use one timer to triggeer another. Timer synchronization is more difficult than we thought, as we are using one timer to trigger another, and the second one has to start at the exact same time to be able to trigger the ADC. We had to fiddle around with the prescaler of the timer…
This week I worked on the Design Review Report and prepare for the Design Review Presentation. The report involves doing a lot more background research into the further mathematical details of Field Oriented Control theory. I also contributed to writing the abstract, introduction, architecture/principle of operation, and the project management sections of the report. I spent some time looking into tabletop motor dynos, which looks like it might be possible if we find two motors and bind their output shafts…
This week I worked with Deepak on figuring out the UART and DMA firmware that we are putting to test on Janktroller++. We found out that the gate driver on Janktroller has some built in deadtime, which we are using in addition to the deadtime we are setting in software, which initially was confusing but now makes more sense. Getting live UART data from the board meant that we were able to get live diagnostic data to better understand what…
This week I spent time working on reading the pwm.c firmware we wrote for CMR’s firmware library, which uses a microcontroller in the same family as the Janktroller. The ST microcontroller datasheet was very helpful in identifying the different modes we need to set in the center-aligned PWM control firmware. I have also started researching battery solutions to power our motor and motor controller, such as looking into battery assembly clips (https://vruzend.com/ for example) and a potential BMS ASIC (http://www.ti.com/lit/ds/symlink/bq76940.pdf)….