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Instant High Torque Application using STSPIN32F0

Ritul Shah
Associate II

Hello Madam/Sir,

@Cristiana SCARAMEL​ 

We are developing a PMSM motor drive for an industrial application. This application is for Sugarcane Juice machine where we require to provide instant high torque for a shorter duration.

I have developed a PMSM drive using the STSPIN32F0 controller. Drive is able to provide some 14 Amp loading for a small or a medium sized sugarcane on the motor instantly. But incase of a thicker sugarcane it may be requiring more Amps. But at that time, controller speed reduces significantly and gives a Speed Feedback or OverCurrent faults.

Motor parameters: 

Pole Pairs: 2

Nominal Voltage: 36V

Max Current: 25A

Nominal Speed: 1400 RPM

Rs: 0.48 Ohms

Ls: 2.5 mHenry

Bemf Constant: 17 KRPM/Vrms

Control Technique: 3 Shunt Sensorless FOC

I have few questions in which I require your guidance.

  1. Does this controller STSPIN32F0 support this power rating? (Approx 900 Watt) 
  2. Should I run the motor in Torque Control Mode or Speed Control Mode?
  3. Do I need to use 2 different PI loops? one for starting and another for Running conditions?
  4. How do I tune the Motor for this instantaneous Torque application? Please share a guide document if it is possible?
  5. I am Sharing the STMCX file for your reference. Let me know if you require any more information for the same.

Awaiting your reply soon.

Thank you

Ritul Shah

2 REPLIES 2
Ritul Shah
Associate II

Can someone reply on this query?

SpinKernel
Senior

Disable over current ;-) Or make it something your comfortable with.

You would want Torque since speed isn't exactly your concern.

The rest i'm still struggling with myself.