i.MX RT Series

[a8Chcx]

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

[a8Chcx]

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

[Miguel04]

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.

[a8Chcx]

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

[a8Chcx]

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

[Miguel04]

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.

[a8Chcx]

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

[Miguel04]

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.

[a8Chcx]

Hi Miguel,

Sorry.

Need 16 PWM channels for 2 BLDCs + 1DC.

Thanks,

Christie