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CCS/TMS320F28027F: problem with torque control

msadegh agha
Expert 1830 points
Part Number: TMS320F28027F


Tool/software: Code Composer Studio

hi,

i designed my own HVKit based on TI HVKit with f28027.

everything is fine but now i want to start running a torque control in my design.

i test a proj_lab4 and proj_lab5a and finally composed them with proj_lab10a.

my question is what is the relation between gMotorVars.IqRef_A, USER_MOTOR_MAX_CURRENT, I_phase and gMotorVars.SpeedRef_krpm.

is there any relation between them?

actually i want to know how can i limit the speed or current of motor with torque control ?

thanks

  • 0
    TI__Guru** 116420 points
    USER_MOTOR_MAX_CURRENT is used during ID and run-time, sets a limit on the maximum current command output of the
    provided Speed PI Controller to the Iq controller, so gMotorVars.IqRef_A will be set to be lower than USER_MOTOR_MAX_CURRENT. No special relation between I_phase and gMotorVars.SpeedRef_krpm.
    Often, increasing gMotorVars.IqRef_A will increase I_phase, and gMotorVars.SpeedRef_krpm is the target speed of motor, the higher reference speed need higher torque current in the same loading condition.
    Used USER_MOTOR_MAX_CURRENT to limit the torque current when working in speed close loop. Need to adjust or limit the torque current to limit the speed also when you want to implement torque control.