TMS320F28388D: Real unit of speedRef and posArray in servo motor drive solution

Minh Duc Tran

Part Number: TMS320F28388D
Other Parts Discussed in Thread: C2000WARE

Hello,

I am new to TI microcontroller and I am working with the fcl_f2838x_tmdxiddk solution in the C2000Ware_MotorControl_SDK_3_02_00_00 package. I am testing the level 4 and the speedRef is set as 0.05 by default, I want to convert this value to revolution per second, how could I do it? Moreover, how could I find the real unit of elements in the posArray in the level 5?

Thanks and best regard!

over 4 years ago

0 Aditya Dholakia over 4 years ago

TI__Expert 7210 points

Hi,

Our expert is OoO for this week. Request you to expect delay in response.

0 Ramesh Ramamoorthy over 4 years ago in reply to Aditya Dholakia

TI__Mastermind 27240 points

0.05 is on per unit scale, which is 5% of BASE_FREQUENCY that you can see in **settings.h file. It represents electrical rotations per second. If you wish to use mech rotations per second, divide it by POLE_PAIRS.

0 Ramesh Ramamoorthy over 4 years ago in reply to Ramesh Ramamoorthy

TI__Mastermind 27240 points

The unit of elements in posArray are in per unit - meaning, 0 to 0.9999 represents 0 to 359.999 mechanical degrees.

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TMS320F28388D: Real unit of speedRef and posArray in servo motor drive solution