I opened up the InstaSpin HV PFC kit today from Mouser. After going through the quick start guide and configuring the banana jumper to use the AC power supply, I was quickly spinning a PMSM with the InstaSPIN motion GUI. After that, I mvoed over to using a 300V 9A DC power supply. I set the supply to 200VDC and current limited to 1A. I set the GUI to ACIM and set the pole pairs and current limit. Within a few seconds of clicking the identify motor button, the motor spun around a few times. A few seconds later, one of the current sense resistors blew off the board and is now sitting/standing at 45 degrees from the plane of the PCB.
This is a standard 220V ACIM that is right at the 1.5KW limit of the board. Does the software not react quickly enough to protect components on the board and does the current fault circuit not latch the IGBT module to also protect the board? I'm not being productive with having a $750 brick on my desk until I can order parts to fix it. Can I stick some resistors from the lab in place of the 0.02? How close to the 0.02 Ohms do they have to be so that the software still works correctly?
Thanks a bunch.
