TMS320F280049C-Q1: tms320f280049c

sagar yadav1

Intellectual 470 points

Part Number: TMS320F280049C-Q1

Hi,

I am using PMSM motor control with hall effect sensor .

I used FOC algorithm with speed loop and current loop.

I am getting non sinusoidal output current wave form ,It should be sinusoidal .

Which factor is responsible for this non - sinusoidal current.

PWM freq-20khz

Isr is - 50usec.

{

Read Hall Effect Sensor()

clark ()

park()

slow speed loop (PI)

torque (PI)

ID (PI)

Inverse park ()

svpwm()

Read Speed()

}

Please help me to resolved this problem

Regards,

over 4 years ago

0 Veena Kamath over 4 years ago

TI__Mastermind 32695 points

Hi,

The subject matter expert is on leave today. Please expect a response in 2 days.

Regards,

Veena

0 Manu36 over 4 years ago

Expert 1410 points

Hi, I will suggest to check the wiring (hall sensor and motor phase). The 3 hall sensor must be connected in the right order and position...

Sometimes I have such current waveform if the wiring is not correct (sinusoidal drive with non TI microcontroller).

Regards.

0 Yanming Luo over 4 years ago in reply to Manu36

TI__Guru** 117240 points

How do you convert the hall sensor signals to the rotor angle? The sensing angle is a continuous value, or just six different value? The current waveform is correct if the rotor angle you used is just 6 different value per the hall sensor.

You may try to use the Datalog with graph tool in CCS, or a PWMDAC, or DAC to monitor the rotor angle that will help you to find the root cause.

0 sagar yadav1 over 4 years ago in reply to Yanming Luo

Intellectual 470 points

Hi,

Thank you for response.

I am getting rotor angle is 6 different values.

Can FAST estimator will help to improve the current waveforms?

Regards,

0 Yanming Luo over 4 years ago in reply to sagar yadav1

TI__Guru** 117240 points

Yes. The sensorless-FOC with FAST will drive the motor with sinusoidal current waveform.

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TMS320F280049C-Q1: tms320f280049c