Other Parts Discussed in Thread: DRV10987, DRV10970, , DRV8308
hello experts,
I have own a DRV10983Q1EWM to evaluate my motor. From help from this forum, I can do open loop and close loop control very well.
https://e2e.ti.com/support/motor-drivers/f/38/t/773710
However, I got stuck at current limit alarm, and the driver will automatically shutdown the motor and restart gain when over current. Even the current is not high
I make a report file, but can not attach. So that I would like to past its content here:
I have some questions:
1. Speed motor report may not exactly. What should I do? may I ignore it?
2. why driver alarm Current limit while actual current is lower than its threshold?
Best regards,
My report file as below:
Picture 1: motor speed report may not exactly, it is far from the true. Over current is happened always at speed setting 280Hz. If increase speed setting to 300Hz, motor will shutdown automatically.
Picture 2: driver configuration
Picture 3: driver configuration
Picture 4: current waveform at phase V of the motor using current sensor ACS712ELC-05B. Voltage output 0à5V corresponding linearly with current input -5A à 5A (zero ampere mean 2.5V output).
From the wave form, we can see that the current is under 1A (the external digital monitor is also show that the average current is 0.8A). But the driver alarm Limit current even driver can run at 2A RMS, 3A max.