topic Re: i.MX RT Series in i.MX RT Crossover MCUs

i.MX RT Series

a8Chcx — Thu, 04 May 2023 12:05:58 GMT

Hi,

I am using MKV58 to drive 3 BLDC and 1 DC motors by using 8 PWM channels.

Now, I am checking i.MX RT series and only find there is 4 PWM channels available to use.

Can anybody tell me if there is 8 PWM channels available on i.MX RT series? Ii is possible to drive 2 BLDC and 1 DC motors? and how?

Thanks,

Christie

Re: i.MX RT Series

Miguel04 — Thu, 04 May 2023 18:26:07 GMT

Hi @a8Chcx

The i.MX RT1170 supports up to 8 channels for each FlexPWM module.

You can find this information on the datasheet.

Yes, it is possible to drive 2 BLDC and 1 DC motor.

Best Regards, Miguel.

Re: i.MX RT Series

a8Chcx — Thu, 04 May 2023 19:48:56 GMT

Hi Miguel,

Thanks.

I checked on NXP web. There 4 flexPWM on RT1060, RT1064 and RT1050.

Do they have 8 PWM channels as well? The reason is that I want to use single core and BGA196 and they are all pin compatibe?

Thanks,

Christie

Re: i.MX RT Series

a8Chcx — Thu, 04 May 2023 20:29:10 GMT

Hi Miguel,

I checked the data sheet of RT1170. There are 8 individual PWM channels.

It can only drive 4 full-bridges and can't drive 2 BLDCs and 1 DC motor(Required 6 full-bridges).

Can I use 4 quad-time as PWMs' output channel as well?

Thanks,

Christie

Re: i.MX RT Series

a8Chcx — Mon, 08 May 2023 14:41:31 GMT

Hi,

Any one can tell me how to control 2 BLDC and 1 DC motors by using RT1050/1064?

Is there any reference design for it?

Thanks,

Christie

Re: i.MX RT Series

Miguel04 — Mon, 08 May 2023 17:26:00 GMT

Hi @a8Chcx

Yes, you can look on the product's data sheet and they have also the PWM channels.

Regarding your other questions, you can look into this link about BLDC motor control.

Best Regards, Miguel.

Re: i.MX RT Series

a8Chcx — Tue, 09 May 2023 15:04:46 GMT

Hi Miguel,

I already design 2 BLDC + 1DC control with KV58 MCU. and works fine.

The problem with RT series only have 8 PWM channels and not enough for 2 BLDCs+1 DC(required 12 channels).

Thanks,

Christie

Re: i.MX RT Series

a8Chcx — Tue, 09 May 2023 15:08:43 GMT

Hi Miguel,

Sorry.

Need 16 PWM channels for 2 BLDCs + 1DC.

Thanks,

Christie

Re: i.MX RT Series

Miguel04 — Tue, 09 May 2023 18:30:58 GMT

Hi @a8Chcx

The eFlexPWM supports 8 individual channels for each eFlexPWM1-eFlexPWM4.

Look also into this link, you will find more documents for motor control.

MCUXpresso SDK for Motor Control.

Best Regards, Miguel.