CCS/TMS320F28069: Motor can't handle relatively low accelerations

Hans Dampf14

Tool/software: Code Composer Studio

hi,

I'm setting my control parameters with instaspin lab 5b.

so i'm giving a setpoint step. no matter how high the setpoint is, if the max acceleration is higher than 80 rpmps, the motor jerks slowly forwards and backwards and the power supply starts making some noise (and the target speed is never reached).

i know that the motor can handle higher accelerations and the current or voltage limit are not reached.

so can the control parameters be so wrong that it causes the issue? or have you got another idea?

thanks in advance!

over 7 years ago

0 Sean Bigley over 7 years ago

TI__Genius 17175 points

Hi Hans

I'm working through your question and will try to provide an initial answer within the next 24 hours

Thanks
Sean

0 Hans Dampf14 over 7 years ago in reply to Sean Bigley

Prodigy 120 points

thank you sean, and i forgot to metion that when this error occurs, the phase current which comes out of the tapas is a sinus with low frequency and MAX_CURRENT amplitude.
i also checked if forceangle changes something (it doesn't)

0 Yanming Luo over 7 years ago in reply to Hans Dampf14

TI__Guru** 117160 points

May I ask if you used lab02b or lab02c to identify the motor parameters properly? If no, you should do this first, and set the identified motor parameters in user.h for lab05b.
What's the target reference speed in this state you mentioned?

0 Yanming Luo over 7 years ago in reply to Yanming Luo

TI__Guru** 117160 points

Hi Hans,

Just wanted to check in and see if there is any update from your side, I haven’t heard from you for two weeks, so I’m assuming you were able to resolve your issue. Please let me know if you have any questions. We would like to close this thread if no further questions. Thanks.

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CCS/TMS320F28069: Motor can't handle relatively low accelerations