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DRV8303EVM: DRV8303EVM + InstaSPIN BLDC GUI => motor not spinning

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Part Number:DRV8303EVM

Hello,

I spent many hours trying to spin my motor with very little success.

I am focusing on "PWM control mode"

#1:

The only way I can keep the motor spinning is to enable "Advanced Startup Options"

but even with this enabled, the control seems to stay in "Startup" mode (the main Knob=duty cycle has no effect).

The main knob only affects the spinning direction (CW or CCW) but has no effect on RPM

#2: The BEMF waveform (Vag = Second graph: Displays the PU Phase-A BEMF waveform) seems strange:

I am using

InstaSPIN-BLDC_GUI_DRV83xx_v104.exe

+

InstaSPIN-BLDC_GUI_DRV8301_v104.out            (reflashing the MCU with this did not change the behavior)

Can you help?

Thanks.


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