Hello Shaiko,
Yes, You are right. Let me tell you what is happening.
The issue is coming once you turn on the power natch on.
Suppose, I am turning power natch ON for first time. motor is working.Natch turned Off. Motor stopps.
When I am turning power natch ON for second time.Motor is working. Natch turns off. Motor stopps.
After 11th time same operation, motor working fine.
At 12th operation, once natch turns on, quickly there is a spark and current in power supply reaches 80-100A. Motor not even rotate. At the moment, you turn on the natch, there is a spark. The conclusion is both MOSFET'S of one phase burned and the current sense resistor burns.
This happens at random stages. Sometimes at 2nd time. sometimes 9th time. Some times 20th. sometimes 7th. Sometimes 1st time.
1. Ramp up the voltage slowly during startup.
2. Close the BLDC control loop as fast as possible.
I have done this. The motor is slowly starting.
Please suggest.