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CCS/TMDSCNCD28335: CCS/TMDSCNCD28335:

bilal c
Prodigy 95 points
Part Number: TMDSCNCD28335
Other Parts Discussed in Thread: C2000WARE, TMDSCNCD28069ISO

Tool/software: Code Composer Studio

hi I have a problem..

I built 3-phase inverter by using mitsubishi ps21767 ipm modul. After that I generated 120 degrees phase shift pwm signal and I burned the code in TMS320F2833x microcontroller, and I observed the output voltage by supplying 50 V to the resistance by the inverter. The experiment card is fed by external voltage supply, meanwhile. (I have not observed any problem and the waveform was normal) Later, I tried to use the PMSM speed control without sensors. I tried to configure HVPM_sensorless_2833x  by using the code composer studio suite as it is explained in the note (#define LEVEL1 1). I observed the steps and I generated SVPWM signal and I observed in CCS. For the next step I tried to do (Level 1C (PWM_MACRO and INVERTER Test)). However, when I feed TMS320F2833x Microcontrollers via USB cable from PC, the microcontroller exploded. Is the main  problem connection of the PC gnd and DC bus gnd together? How do you work by depending on PC in the application> Some of the slides show that there is an insulation material between control cards and PC. Otherwise, do we need to disconnect from PC when we try to open the power unit?

  • 0
    TI__Mastermind 27240 points
    Are you using 335 control card or is the mcu soldered in your application board?

    With our control cards, there is isolation between the emulator and the mcu/power electronics sections, and so don't anticipate any GNDing issues.
  • 0 in reply to Ramesh Ramamoorthy
    Prodigy 95 points
    Thanks a lot your answer ramesh...
    Yes ı am using delfino tms32028335 TMS320C2000 DSC Experimenter kit. But where is issue ı cant understand.I am sure ı removed external power supply(5v) and put on pc usb jack.other all state is same.how can solve this problem
  • 0 in reply to bilal c
    TI__Guru 71835 points

    Bilal,

    This generation of controlCARDs do not have the emulation(XDS100) built into them, and therefore rely on the XDS100 on the docking station or an external JTAG plugged into the 14-pin header.  

    Unfortunately the on-board JTAG is NOT isolated, so there likely will be issues with connecting the grounds across the controlled system and the PC.

    Your best option would be to buy an external emulator like https://www.ti.com/tool/TMDSEMU110-U and then buy an isolator like https://www.blackhawk-dsp.com/products/jtag-isolation/iso14-pin  

    In some of the newer control CARDs we have the JTAG emulator built on the control CARD with isolation, you could look at this if you want to try and create the circuit yourself.  A good example in C2000Ware install dir is C:\ti\c2000\C2000Ware_1_00_06_00\boards\controlCARDs\TMDSCNCD28069ISO

    Let me know if you have further questions.

    Best,

    Matthew