what dev kit for F281x BLDC3_2 ? brushless sensorless F2812 / F2833x

Hello Brett,

this TMDSHVMTRPFCKIT you mentioned is exactly what I need. Unfortunately I can't afford it, thats why I'am trying to build a low cost alternative.

So far my equipment consists of  a Peripheral Experimenter Board (F28335). The power stage I want to build up with the DRV8332. But I just can't find a suitable PMSM.

Do you know, if i can buy the motor which is included in the TMDS1MTRPFCKIT (the low voltage counterpart) separately?

Thanks,

Thomas

Thomas,

In the next two days we will announce DRV8312-C2-KIT, with order entry open and kits in stock.

It uses the DRV8312 and includes Piccolo F28035 Isolated controlCARD and the PMSM/BLDC motor from the 1MTR/2MTR kit.

If you must use the 8332 for the higher current, you will need to go down the path of the experimenter's kit wired into the 8332 module. We have plans to build an 8332-C2-KIT, but it's lower priority right now.

BTW - if you want to use floating point, the code set included with this kit is dual build, supporting the F2806x Floating Point Piccolo as well.  You would need an external emulator has we haven't released the F2806x ISO card quite yet (soon).

Hi Chris,

thank you for the reply. The DRV8312-C2-KIT sounds promising and the current is not the crux therefore i don't insist on the DRV8332. But I need the F28335 because I want to use this whole project in preparation for my master thesis next semester and there I have to use the Delfino. Do you have another hint?

You mentioned that the motor from the 1MTR/2MTR kit is a PMSM/BLDC. Is that a hybrid type? I thought that in the PMSM a homogeneous field can only be developed if it is operated with a  sinusoidal commutation. The BLDC needs a trapezoidal to develop such a homogeneous field instead. Of course you can mix that up but it is less effective. At least that is what i read and heard about it. But if I'am wrong please tell me. Can I use every BLDC as a PMSM without hesitation?

Thomas,

I would buy the DRV8312-C2-KIT on Thursday, and also but an F28335 controlCARD.  You will be able to use the F28069 code switch for almost 100% code compatibility. You will need to check the pin settings and the ADC will be a bit different.  You could also look at the F28335 code on the HVKit for a bit of a hint.

As for BLDC vs. PMSM/BLAC, the motors themselves are VERY similar. If you look at the back-emf of a bldc motor, many of them look quite sinusoidal, and unless you have purchased a very nice PMSM motor, it may not look 100% sinusoidal.  It all depends on the quality of the construction. Yes, you can often drive "BLDC" motors as PMSM (and many often do) to decrease torque ripple, audible noise, and provide overall smoother performance.

There is a section on this topic in the 1-day workshop material in controlSUITE that is in the Dual Axis section of KITS.

I will look for the DRV8312-C2-KIT tomorrow and if it is financially manageable I will buy it. Good to know that it is compatible with the F28335.

Thanks for the hint with the workshop about the BLDC vs. PMSM issue. Things are much clearer now. I had all this (except for the BLDC part) during my studies but everything I kept from that was a nebula of theoretical assumptions and formulas. I hope it gets even clearer when I use it in a practical application e.g.  the DRV8312-C2-KIT.

 Again thanks for your help.

With best regards

  It will be $299