Part Number: DRV8353R
Hi,
Our Project is working now with DRV8353RS to drive a PMSM Motor. We are using all of 3 Shunt Resistors to measurement Motor Phase Currents.
By HIL- Testing it happened a strange thing with motor current. After about 20 seconds with high load test, current value decrease about 3A.
I have checked these SO_x Signals from Gate Driver and it is probably depended on temperature. By 90 °C increases SOx_Signal 0,01V like be calculated 3A.
First question:
How can i compensate this temperature drift effect ?
Second question:
After this Measurement, i have noticed that, three SOx_Signals don't have the same voltage level and the signal behaviors in depending on temperature are also difference.
Below you can see a diagram of SOx_Signal depending on temp.
Thanks !
Best regard.