Roberto Javier Homs Puron Posted January 19, 2017 Share Posted January 19, 2017 Hi, I have a problem with the configuration of the current close loop on the PowerBrickAC. We have DC (brush) motor with the next specifications: R = 3.7 ohms L = 2.7 mH V = 48 VDC We configure the motor as the manual said. To do the auto-tuning of the current close loop we blocked the motor and set the PhaseTableBias to +512, but the response did not according to the manual, and our expectations. We read the manual of the Power Pmac to tune the current close loop, but we don't understand why the amplitud of the step test waveform is too different to the value that we set. I attached the graph of the response and the configuration. Thanks in advance, Regards Roberto Link to comment Share on other sites More sharing options...
Gregs Posted January 26, 2017 Share Posted January 26, 2017 In the Current Loop Step Parameter Setup, try setting Rough Phasing Magnitude to 0 bits (phasing is done in the motor). Link to comment Share on other sites More sharing options...
Clopedandle Posted January 26, 2017 Share Posted January 26, 2017 I seem to remember needing to set PhaseTableBias to -512 for certain DC brush motors to get a better-looking current loop response. Link to comment Share on other sites More sharing options...
Roberto Javier Homs Puron Posted January 27, 2017 Author Share Posted January 27, 2017 In the Current Loop Step Parameter Setup, try setting Rough Phasing Magnitude to 0 bits (phasing is done in the motor). Thanks for the help, I did change the Rought Pahsing to 0 and I have the same response. Link to comment Share on other sites More sharing options...
Roberto Javier Homs Puron Posted January 27, 2017 Author Share Posted January 27, 2017 I seem to remember needing to set PhaseTableBias to -512 for certain DC brush motors to get a better-looking current loop response. Thank for your help. I did but it not change too much Link to comment Share on other sites More sharing options...
Roberto Javier Homs Puron Posted January 27, 2017 Author Share Posted January 27, 2017 I have another problem with another motor, it is similar to the first one but the voltage is 24V. The problem is that the response is too strange, first of all it is negative and I changed the PhaseTableBias=-512 and the response does not change. In addition the curve finish at 0 it is not logic. Link to comment Share on other sites More sharing options...
Gregs Posted January 27, 2017 Share Posted January 27, 2017 Tech Support is better suited to handle this issue. Please email the step responses and setup information to Support@DeltaTau.com. Clopedandle, thanks for the input. Wow, another appearance of the rare and legendary Clopedandle, the only one known of in existence! Link to comment Share on other sites More sharing options...
Roberto Javier Homs Puron Posted January 30, 2017 Author Share Posted January 30, 2017 Tech Support is better suited to handle this issue. Please email the step responses and setup information to Support@DeltaTau.com. Clopedandle, thanks for the input. Wow, another appearance of the rare and legendary Clopedandle, the only one known of in existence! Thanks for your help, I will send a email to Tech Support. Link to comment Share on other sites More sharing options...
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