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
IQ Full-Scale Frequency represents the electrical frequency of the motor in a per unit value. In other words, the electrical frequency of the motor is normalized with the value in this define. It is recommended to have a value of IQ full-scale frequency equal to the absolute maximum electrical frequency that the motor will run in the application.
Set IQ full-scale frequency equal to the motor's absolute maximum electrical frequency.
To illustrate a typical example of this value, consider a PMSM motor with four pole pairs, running at an absolute maximum speed of 15,000 RPM. In this case, the absolute maximum frequency of the motor is 15000/60*4 = 1000 Hz. The following setting of the IQ full-scale frequency is recommended in this case:
//! \brief Defines the full-scale frequency for IQ variable, Hz
#define USER_IQ_FULL_SCALE_FREQ_Hz (1000.0)
It is important to note that this value must be higher than any allowable frequency in the motor, so it is recommended to add 20-30% headroom to this value, higher than the maximum expected frequency of the motor.