topic BLDC Motor Control in LPCXpresso IDE

BLDC Motor Control

lpcware — Wed, 15 Jun 2016 23:23:40 GMT

Content originally posted in LPCWare by hcanova on Sat Oct 27 10:07:38 MST 2012
Hi I'm trying to do filed oriented control, FOC , to control an BLDC motor using the Embedded Artists motor control board, I'm trying to use the nxpMClib to do that, but this library is for the lpc1800 not to lpc1700, some one has any idea how I can make the FOC control?, I made an code based on this library buy the system not work correctly.

Thanks in advance

hcanova

Re: BLDC Motor Control

lpcware — Wed, 15 Jun 2016 23:23:41 GMT

Content originally posted in LPCWare by NXP_Europe on Thu Nov 01 07:18:42 MST 2012
It is very hard do determine any problem with your software without more details.
The FOC code is not ported/released for the LPC1700 series because of some limitations which doesn't make it a very suitable platform to run FOC. For FOC it is requered to sample at least 2 phase current at the sme time, as the LPC1700 has only one ADC this requerement is met. Although it could work with only one ADC it will introduce some significant errors in the measurents due to the shift in time.

Have you seen this application note:
http://www.nxp.com/documents/application_note/AN10899.pdf
It discribes how the FOC works.

Re: BLDC Motor Control

lpcware — Wed, 15 Jun 2016 23:23:41 GMT

Content originally posted in LPCWare by hcanova on Mon Nov 05 17:01:50 MST 2012

Quote: NXP_Europe
It is very hard do determine any problem with your software without more details.
The FOC code is not ported/released for the LPC1700 series because of some limitations which doesn't make it a very suitable platform to run FOC. For FOC it is requered to sample at least 2 phase current at the sme time, as the LPC1700 has only one ADC this requerement is met. Although it could work with only one ADC it will introduce some significant errors in the measurents due to the shift in time.

Have you seen this application note:
http://www.nxp.com/documents/application_note/AN10899.pdf
It discribes how the FOC works.

Hi I wrote some code, but my motor doesn't work very well, only at slow speed and some times stop..run...stop..., I will try more, if I had problem I problaby will change to LPC18xx.ThanksHCanova