CCS/TMS320F28335: Control of BLDC motor

RAJAT KUMAR RAGHAV

Part Number: TMS320F28335
Other Parts Discussed in Thread: CONTROLSUITE

Tool/software: Code Composer Studio

Hi,

I want to run my BLDC motor with the help of my DSP(TMS320F28335). However it is able to detect change in Hall State ( I confirmed it by rotating rotor with hand). But as soon as Hall State is changing, corresponding pulses is not developed. However after when I stop the debugging and debug it again then corresponding correct pulses are produced. I am not getting how to develop pulses continuously according to change in hall state. I am using following code-

#define H_A GpiodataRegs.GPADAT.bit.GPIO24

#define H_ B GpiodataRegs.GPADAT.bit.GPIO25

#define H_C GpiodataRegs.GPADAT.bit.GPIO26

if (H_A == 1)

H1=1;

else H1=0;

if (H_2 == 1)

H2=1;

else H2=0;

if (H_C == 1)

H3=1;

else H3=0;

then calculating corresponding hall state and the switching.

over 4 years ago

0 Yanming Luo over 4 years ago

TI__Guru** 109730 points

Yes. You need to change the commutation state according to the connection order of both the hall sensor and the motor wires. So we can't help you check if the code you mentioned is right or not, you have to define the commutation state by yourself.

0 RAJAT KUMAR RAGHAV over 4 years ago in reply to Yanming Luo

Prodigy 40 points

I have provided pwm pulses to upper switches of inverter and constant high pulse (using AQCSFRC) to lower switches. However on transition, conduction of lower switches is shifted but pwm pulses is not transferred to another upper group switch as per commutation table.

0 RAJAT KUMAR RAGHAV over 4 years ago in reply to Yanming Luo

Prodigy 40 points

Validation of commutation table and connection of motor terminals and hall sensors has already been tested with another microcontroller. And motor is running perfectly.

0 Yanming Luo over 4 years ago in reply to RAJAT KUMAR RAGHAV

TI__Guru** 109730 points

What do you mean "another microcontroller"? Are you using the same inverter board?

Did you have a chance to look at the reference design under the folder below if you download and install the controlSUITE? Although the reference design is based on F28035, which should be easy to implement on F28335 also.

\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\HVBLDC_Sensored

http://www.ti.com/tool/CONTROLSUITE

0 RAJAT KUMAR RAGHAV over 4 years ago in reply to Yanming Luo

Prodigy 40 points

"another microcontroller" means one of my friend is also running the same setup with the help of microcontroller provided by STM.

Yes, I tried looking into the folder which you said. However, unfortunately, it was hard for me to understand that.

0 Yanming Luo over 4 years ago in reply to RAJAT KUMAR RAGHAV

TI__Guru** 109730 points

You may don't change anything and use the kit with the recommended motor to understand the project first, the application report has shown the details for this project. Unfortunately, we can't help you to check if the code is right since the code depends on both the motor and hall sensor wires connection.

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CCS/TMS320F28335: Control of BLDC motor