How to modify the code when using much higher current motor?

Brant Zheng

Other Parts Discussed in Thread: MOTORWARE

Hello InstaSPIN community,

We have been using DRV8301-HC-EVM and F28069M ISO controlCARD. We spent time running InstaSPIN Projects and finished all labs with our ACIM. Finally we have designed our board.

Everything goes well when we use the ACIM with the max current of 43A.

Then, we change the current sense with a measure range of ±250A and use an ACIM with the max current of 140A. So the USER_IQ_FULL_SCALE_CURRENT_A is 250.0 and the USER_MOTOR_MAX_CURRENT is 140.0 in user.h. It works normally when we run the labs of InstaSPIN-FOC.

But problems happen when we run tha lab12a and lab12b.It shows some warnings of

"#175-D floating-point value does not fit in required integral type"

and point the code which has "IQ(USER_IQ_FULL_SCALE_CURRENT_A)" in it.

In order to make the board support the high current ACIM, how to modify the code correctly?

over 9 years ago

0 MatthewPate over 9 years ago

TI__Guru 71835 points

Brant,

Take a look at the bottom of this thread and see if this also solves your problem. Essentially we need to switch to kA past a certain point.

http://e2e.ti.com/support/microcontrollers/c2000/f/902/t/340517

Matt

0 Brant Zheng over 9 years ago in reply to MatthewPate

Intellectual 415 points

Hello matt,

Thanks for your advice. But I can not even find the "gMotorVars.Id_A" in lab12b. Maybe the version of labs which they discussed is old?

0 Adam D. Reynolds over 9 years ago in reply to Brant Zheng

Guru 12800 points

Brant,

In MotorWare, not all of the labs make use of all of the available variables in gMotorVars. For example, gMotorVars.Ld_A is only used in labs where the d-axis reference current is adjusted. The post that he was referring to is an example of how to modify the lab code to work with kA instead of A.

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How to modify the code when using much higher current motor?