Other Parts Discussed in Thread: MCF8329A, MOTORSTUDIO
Tool/software:
The Base Current I calculated using the Equation given in the MCF8329A Tuning guide (with RSENSE=1mOhm; CSA_GAIN=40 V/V as that was the value in the corresponding register then) was 1024 or 0x400 which from my understanding corresponds to 37.5A.
I am driving my BLDC-Motor at a voltage of 18V and a max current of 10A (using current limiter of my bench power supply). In the default fault configuration ILIMIT=60%, HW_LOCK_LIMIT=80% and LOCK_LIMIT=65%, still when trying to start the motor I instantly get a HW_LOCK_LIMIT fault. The System can't draw (and isn't drawing) 80% of 37,5A which is the source of my confusion.
Through trial and error I got the Motor running decently well by setting CSA_GAIN to 5 V/V but leaving the Base Current untouched. I think I am misunderstanding something about how the Base Current and current limit settings function.
Attached is my current configuration exported from MotorStudio as a txt file.
In this configuration the motor is spinning but very slow acceleration and high noise level which I couldn't improve using the provided tuning wizards.
Thank you for your time,
George







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