topic Re: Motor Control Class: Lecture 5 - Hall Sensors in Model-Based Design Toolbox (MBDT)

Motor Control Class: Lecture 5 - Hall Sensors

Daniel_Popa — Mon, 12 Jun 2017 05:49:46 GMT

In this fifth lecture of the motor control course we discuss about how can we read the hall sensors to obtain the rotor position in order to know how to apply the correct voltage sequence to the motor phases.

Main topics:

- How Hall sensors works;

- How to define a commutation sector;

- How to identify the hall sensors and hall sensors alignment;

- How to build applications to read the hall sensors via GPIO and eTIMER Capture;

- How to implement an enhancement to read the rotor initial position to allow the startup from any position;

Objectives:

- Understand how hall sensors works;

- Implement from scratch Simulink models for GPIO and eTIMER for MPC5744P;

- Setup FreeMASTER for real time data visualization;

NOTE: Chinese viewers can watch the video on YOUKU using this link

注意：中国观众可以使用此链接观看YOUKU上的视频

NOTE: Chinese viewers can watch the video on YOUKU using this link

注意：中国观众可以使用此链接观看YOUKU上的视频

NOTE: Chinese viewers can watch the video on YOUKU using this link

注意：中国观众可以使用此链接观看YOUKU上的视频

Additional information:

- pdf attached with slides shown in these videos;

- Simulink models used in these videos;

Original Attachment has been moved to: Lecture5---Simulink-Models.zip

Update revisions:

February 25, 2019

update the model to work with Model-Based Design Toolbox for MPC57xx Automotive Version 3.0.0 .

May 06, 2020

update the model to work with Model-Based Design Toolbox for MPC57xx Automotive Version 3.2.0 .

Re: Motor Control Class: Lecture 5 - Hall Sensors

lukasschäfer — Wed, 05 Jul 2017 13:23:24 GMT

Hi dumitru-daniel.popa

i have a question to the eTimer module.

What value gives the STS Register? Is there a possibility to get the counting value of the eTimer like in the toolbox of the s32k144? To get a time stamp or to measure the time between two edges?

Best regards

Lukas

Re: Motor Control Class: Lecture 5 - Hall Sensors

Daniel_Popa — Wed, 05 Jul 2017 15:14:03 GMT

Hi lukasschäfer‌,

The STS output maps over the Channel n Status Register (ETIMER_CHn_STS)

Each flag description can be found in the Reference Manual at page 1092.

To count between 2 edges you can:

#1: use the eTimer_capture block

#2: Or, you can use the STS to trigger some subsystem to count for.

#3: Or, you can use the eTimer ISR trigger output to start a SW counter (as i did in the Lecture 10) assuming there is no HW support for such capture event.

Hope this helps!

Daniel

Re: Motor Control Class: Lecture 5 - Hall Sensors

lukasschäfer — Thu, 06 Jul 2017 06:57:15 GMT

Hi dumitru-daniel.popa,

can you show me how to configure the eTimer_configuration block when i want to measure the time between two edges with the eTimer_capture block?

Thank you.

Best regards

Lukas

Re: Motor Control Class: Lecture 5 - Hall Sensors

Daniel_Popa — Thu, 06 Jul 2017 13:45:08 GMT

Hi lukasschäfer‌,

Have you tried to use and it and you got wrong results ? or do you have issues to configure the eTimer_config Block compared with the functionalities exposed in the Reference Manual ?

Best regards,

Daniel

Re: Motor Control Class: Lecture 5 - Hall Sensors

lukasschäfer — Fri, 07 Jul 2017 06:14:16 GMT

Hi dumitru-daniel.popa,

i tried to use it but i don't know what value i get from the eTimer_capture block. I don't understand what value CAPT1 FIFO and CAPT2 FIFO stand for.

Can you explain how the eTimer_capture block is working?

And what have i to adjust in the eTimer_configuration block?

Thank you.

Best regards.

Lukas

Re: Motor Control Class: Lecture 5 - Hall Sensors

Daniel_Popa — Wed, 12 Jul 2017 06:27:42 GMT

Hi lukasschäfer‌,

Please check this out: How to Measure a Signal with eTimer - Capture it's the simplest example i could think of. Hope it helps!

For the meaning of the FIFO's please refer to the Reference Manual.

Best regards,
Daniel

Re: Motor Control Class: Lecture 5 - Hall Sensors

mahdkhalid — Mon, 12 Feb 2018 11:21:19 GMT

Hi,

When using the EventBased_ReadHallSesnor file I get the same error "Can not detect the board information" on FreeMaster

I don't get this error in the ReadHallSensor file.
I have already applied the hotfix

Do I need to use CAN instead of UART?

Regards

Mahd Khalid

Re: Motor Control Class: Lecture 5 - Hall Sensors

Daniel_Popa — Mon, 12 Feb 2018 13:46:44 GMT

Hi mahdkhalid‌,

Switching to CAN is only required when your will use the MOTORGD to spin the motor because only then the TX1 will interfere with GD_RST_B pin that is supposed to be hold to 1 during pre-driver initialization and normal operation.

In this case i think there is a different issue. Perhaps and error in the model - like FreeMASTER configuration.

Hope this helps!

Daniel

Re: Motor Control Class: Lecture 5 - Hall Sensors

yujiangwu — Fri, 16 Feb 2018 07:04:10 GMT

Hi Dear Daniel,

dumitru-daniel.popa‌

Thanks for the excellent video first. I encountered a @Mahd Khalid. When I try to implement "EventBased_ReadHallSesnor". I get the error "Can not detect the board information" on FreeMaster. Specifically, when I add eTimer0 channel2 into the diagram. I start running into trouble.

In the picture, if I remove the portion circled by the green circle. I am good.

Thanks for your help!

Sincerely,

Yujiang Wu

Re: Motor Control Class: Lecture 5 - Hall Sensors

mahdkhalid — Fri, 16 Feb 2018 09:27:01 GMT

Hi yujiangwu‌

Thank you for the reply.
How do you read the hall sensor C after removing this block?
Thanks,

Mahd Khalid

Re: Motor Control Class: Lecture 5 - Hall Sensors

yujiangwu — Fri, 16 Feb 2018 09:37:09 GMT

Hi mahdkhalid‌,

I did it just for debugging to see what was causing the issue with Freemaster. Yes, you do need it to read Hall_C. Please have a look at Freemaster Can't detect the board information. Hope you can solve the issue as well.

Sincerely,

Yujiang Wu

Re: Motor Control Class: Lecture 5 - Hall Sensors

haoxue1027 — Tue, 14 Jan 2020 03:37:18 GMT

Hi Dear Daniel,

dumitru-daniel.popa

when i follow the course of lesson 9 to cancel the diagnostic ：eTimer and GPO like this

the matlab is abnormal termination . I have added the text of abnormal termination.

Can you help me solve the problems.

best regards.

hao

Re: Motor Control Class: Lecture 5 - Hall Sensors

Daniel_Popa — Tue, 14 Jan 2020 09:23:21 GMT

constantinrazvan.chivu‌,

Can you please have a look and if necessary fill a bug to MathWorks ?

Thank you!

Daniel

Re: Motor Control Class: Lecture 5 - Hall Sensors

haoxue1027 — Thu, 16 Jan 2020 00:40:26 GMT

Hi ,Constantin Razvan Chivu

Is there any solutions to solve the abnormal termination?

best regards

hao

Re: Motor Control Class: Lecture 5 - Hall Sensors

constantinrazva — Thu, 16 Jan 2020 08:10:32 GMT

Hello haoxue1027@qq.com‌,

Can you share the model you are using and let us know what toolbox version you are using? This way I can see if the issue is within our toolbox in the etimer_mpc574x_config.mex64 or some Simulink issue and open a ticket to MathWorks.

Kind regards,

Razvan.

Re: Motor Control Class: Lecture 5 - Hall Sensors

haoxue1027 — Thu, 16 Jan 2020 08:25:05 GMT

Hello Constantin Razvan Chivu

Thanks for replying.

The model i used is the attachment of the Lecture 5-Hall Sensors .

MATLAB versions is matlab2018a

best regards

hao

Re: Motor Control Class: Lecture 5 - Hall Sensors

constantinrazva — Fri, 17 Jan 2020 12:27:11 GMT

Hello @haoxue1027@qq.com

I was referring to what version of our (NXP) toolbox. Can you run the following command in the MATLAB terminal and share the output with us?

ver

I suspect some setup issue and for that I'll have to replicate yours to come up with a solution. Thank you for understanding.

Kind regards,

Razvan.

Re: Motor Control Class: Lecture 5 - Hall Sensors

haoxue1027 — Mon, 20 Jan 2020 14:15:43 GMT

Hello，Razvan

sorry for replying late.

The file has been added to the attachment,

please check.

best regards

hao

Re: Motor Control Class: Lecture 5 - Hall Sensors

haoxue1027 — Thu, 26 Mar 2020 15:42:31 GMT

hello@Razvan

I'm sorry to bother you, is there a solution for this problem?
I run the course again for the demo given by the course , found that system began to collapse until i use the Function-Call subsystem.

There is nothing wrong with using the routines from before lesson 5.

Please check if there's a link between the use of subsystem and system collapse ?

When I use demo"PMSM_ClosedLoop_mpc5744p", system collapse occured.

best regards

hao