Other Parts Discussed in Thread: DRV8834
I conducted measurements of the phase current using the DRV8834 EVM and observed a reduction in driving current after the motor heated up.
Specifically, the current decreased from 207mA to 187mA.
I would appreciate your assistance in understanding this situation. My understanding was that the DRV8834 maintains a consistent current output, so it should ideally remain at the configured value.
For reference, I have attached the current waveforms.
Here are the conditions of my experiment:
1. The driving current was set to 104mA via the EVM GUI.
2. I measured the current from Pin 1 & Pin 6 of the DRV8834.
3. The surface temperature of the motor exceeded 50 degrees during the experiment.
Any insights or guidance you can provide regarding this issue would be greatly appreciated.