topic PMSM_Motor + Lin truble in S32K

PMSM_Motor + Lin truble

uky746 — Wed, 08 Jun 2022 23:48:26 GMT

Hello,

Tool : S32 Design Studio for S32 Platform 3.3

MCU : S32k144W

use Application Note : 1) S32K144EVB (AN12235 PMSM_1ch)

2) lin_slave_s32k144w (SDK)

i try combined two sources.

result

If the LIN signal is not given, the motor operates. (motor 500 rpm , 0.2 Ampere)

The motor stops when the lin signal is activated. (Motor brake , 3 Ampere)

Could anyone help me to solve this problem?

petervlna — Tue, 07 Jun 2022 11:52:32 GMT

Hello,

Could you share which HW development board you are using?

Is it NXP or Custom one?

With a very little information given, I assume that you have some issue with resource sharing in your SW.

You can start with looking into interrupts, which could be most common case for such issue.

Best regards,

Peter

uky746 — Wed, 08 Jun 2022 00:54:35 GMT

We have designed a custom board for our S32K144W

step1 : POWER ON(12V) , Motor run (500rpm, 0.2A)

step2 : start Lin communication

step3 : Motor stop ( 0 rpm ,Brake, 3A)

I think commutation timing calculations are essential for the motor to work.

Motor commutation calculation stops while Lin interrupt is activated

help me~

petervlna — Wed, 08 Jun 2022 08:12:48 GMT

Hello,

So simply you need to manage interrupt priorities. As the motor has the high priority, simply lower LIN interrupt priority.

Have a look at reference manual:

7.2.1 Interrupt priority levels

Best regards,

Peter

uky746 — Thu, 09 Jun 2022 00:09:00 GMT

I resolved this problem follow your advice，Thank you very much！