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Part Number: TIDM-1003
Tool/software: Code Composer Studio
I designed my custom board based on TIDM-1003 to drive 300V, 1200RPM, 4kW/18A three-phase BLDC motor.
First I checked my design, driving 300V, 600RPM, 5A three-phase BLDC motor. It was successful and the firmware successfully identified the motor. then I checked the ID-run's parameters to run my motor and I could properly control my motor, using Univeral-GUI.
Then I decided to check my design for 300V, 1200RPM, 4kW/18A three-phase BLDC motor, but whenever I tried running motor I faced this error:
I unplugged and re-checked it several times, but finally, the IPM and shunt-resistor were damaged! :((
Do you have any idea of the cause and the solution?
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In reply to Yanming Luo:
Thanks for your prompt reply.
I already debugged the project using CCS directly and I faced with the same error. :(
My JTAG emulator is isolated (XDS100v2 is ISO-USB-to-JTAG).
For MCU and power section, you're right! But please consider that I checked the board with another 300V BLDC motor and it worked well. TIDM-1003 has not isolated grounds too.
Could you please describe more and possibly show me a technical guide for the isolation principals?
In addition, I want to ask you about isolation:
1. Which of them is more critical? to isolate the voltage/current sensing circuit's ground or MCU's?
2. how can I effectively isolate them? does Kelvin GND help me or I should try isolation ICs?
3. Is there any reference design which shows isolating circuits and hardware considerations?
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