Hello,
I did a custom design based on EVLSPIN32G4-ACT, schematic is basically the same apart from board shape and connectors.
The hardware is working in general, I successfully got my BLDC motor without an attached load spinning using sensor less speed feedback.
The application is the drive unit for an radial fan. After attaching the fan impeller to the motor shaft the before working setup would not spin up anymore.
I got speed feedback failures, then I raised the start up current until I got over current events. All not working.
The motor also features integrated hall sensors, so I decided to switch to those. The mechanical speed returns sane values inside motor pilot software, so I assume them working.
Using the hall sensor, the motor is trying to spin up in the wrong direction finally failing with an speed feedback error.
How ever, if I give the motor a push in the correct direction, it will spin up and then be driven to the max. application speed. At this point new speed set values are ignored by the firmware until the motor is stopped again.
Summary:
- the custom board seems to be working in general
- the motor looks to be connected and setup so it should be working
- after attaching a load, no spin up in sensor less FOC mode (PLL + Cordic)
- hall sensor setting spins up motor in wrong direction, when pushed by hand to correct direction fast spin up to max speed and new set values are ignored until stopped
Could you give a hint, how to troubleshoot this?
Thanks and best regards
Benjamin
