Hi Team,
Customer has one question need your help.
As for DRV8323RH IC currently being used, its hardware configuration is 1XPWM mode. It uses INHC pins to achieve direction control. The test process is as follows:
The sinusoidal wave signal is transmitted by the host computer. Every 5 ms a sinusoidal wave control point is produced and a period has 20 points. The unit of each point is °. Each point is shown as follows:
0.5，0.4755，0.4045，0.2939，0.1545，0，-0.1545，-0.2939，-0.4045，-0.4755，-0.5，-0.4755，-0.4045，-0.2939，-0.1545，0，0.1545，0.2939，0.4045，0.4755，0.5，
When the steering engineer changes in these two stages (0, -0.1545, -0.2939, -0.4045, -0.4755, -0.5 and 0, 0.1545, 0.2939, 0.4045, 0.4755, 0.5), the feedback (using potentiometer) is normal; when it changes in the remaining two stages , the feedback should last about 15 ms near 0.4755°, then suddenly from 0.4° or -0.4°to 0°.
Through analysis of the difference between these two sections of data, we find that the difference value of one degree is from large to small, and that of the other is from small to large, which will lead to different duty cycles of PWM in the program. The modified duty cycle makes the two sections of data basically the same, but the same phenomenon still exists. After one week , we still didn’t find any solution. Now, we doubt whether DRV8323 IC take too long to switch directions?
Thanks.
