I am using three phase half bridge inverter to power a PMSM motor and bootstrap for the high side MOSFET.
The schematic is in attachment. Gate driver is Si8273, MOSFET is IPT015N10N5. But when I measured the high side signals, I got pretty high ringing during turn-on. The measured points in attachment was between phase output and HV_GND(I know I should measure between gate and source). The measurement between high-side gate and source (phase output) is shown in attachment VGS.
What I am expecting from the VGS is a square curve to 60V, but as we can see is a 12V signal with ringing.
Maybe can someone give me some advice where the problem is, and how it occurs.
Thanks so much in advance.
The layout is pretty complecated, I cut one half-bridge for you guys to discuss. The red arrow is on the VCC-layer for the HV_48V as DC-Link supply; the yellow arrow is on the GND layer; the green arrow is on both top and bottom layer for the phase. Between the green arrows is a Hall-effect current sensor.