CCS/TMS320F28377S: adc count problem

Eswara rao Atchyuta

Part Number: TMS320F28377S
Other Parts Discussed in Thread: CONTROLSUITE

Tool/software: Code Composer Studio

i am using below link

C:\ti\controlSUITE\development_kits\TMDSIDDK_v2.0\IDDK_PM_Servo_F2837x_v2_00_00_00

in this code when i reads the bus voltage before pwm's on adc count is ok but when pwm's(in motorisr) on adc count is increamenting upto366 counts

why adc count is changed can you please assist me

over 7 years ago

0 Manish Bhardwaj over 7 years ago

TI__Mastermind 43730 points

Eswara,

The engineer responsible is out of office, the post has been assigned to him. Please expect a reply next week.

Sorry for the inconvenience.

Regards
Manish Bhardwaj

0 Ramesh Ramamoorthy over 7 years ago in reply to Manish Bhardwaj

TI__Mastermind 27240 points

366 counts represent about 0.09pu, which is on the higher side even after accounting for the worst case ground bounce and jitters due to inverter switching. If the motor is not regenerating when you saw this happen, I don't know what is going on. I don't remember seeing like this, but if it matters to you, consider increasing the filter cap on this feedback signal.

0 Ramesh Ramamoorthy over 7 years ago in reply to Ramesh Ramamoorthy

TI__Mastermind 27240 points

Eswara,

Any updates to this problem. Were you able to figure out the issue?

Rgds,
ramesh

0 Ramesh Ramamoorthy over 7 years ago in reply to Ramesh Ramamoorthy

TI__Mastermind 27240 points

Hello,

Since I didnot hear back from you in a while, I am closing the thread. If you want to discuss further on this topic, if you post it within 30 days, the thread will open again if not you can open a new thread referring to this one.

rgds,

ramesh

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CCS/TMS320F28377S: adc count problem