SPRUHJ1I January 2013 – October 2021 TMS320F2802-Q1 , TMS320F28026-Q1 , TMS320F28026F , TMS320F28027-Q1 , TMS320F28027F , TMS320F28027F-Q1 , TMS320F28052-Q1 , TMS320F28052F , TMS320F28052F-Q1 , TMS320F28052M , TMS320F28052M-Q1 , TMS320F28054-Q1 , TMS320F28054F , TMS320F28054F-Q1 , TMS320F28054M , TMS320F28054M-Q1 , TMS320F2806-Q1 , TMS320F28062-Q1 , TMS320F28062F , TMS320F28062F-Q1 , TMS320F28068F , TMS320F28068M , TMS320F28069-Q1 , TMS320F28069F , TMS320F28069F-Q1 , TMS320F28069M , TMS320F28069M-Q1
The stator resistance is estimated by injecting a constant current, which is set by this parameter. Although this part of the identification process will be explained in detail, a general guideline to set this value is 10% to 20% of the rated phase current of the motor. For example, if a motor requires 4 A to produce rated torque, then the current to estimate the stator resistance (Rs) should be around 0.5 A.
#define USER_MOTOR_RES_EST_CURRENT (0.5)
Later in the motor identification process, this current is also used to get the motor spinning in open loop. If the motor does not spin through the entire ramp up process, increase in 10% of the rated current increments until the shaft is in motion during the entire ramp up process.