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
Another parameter to tune while doing IdRated identification is the delta increments for this current. If this value is too high for a particular motor, a remaining oscillation will be present even when doing IdRated identification for a long period. For example, Figure 7-32 shows the current when the following parameter is used.
//! \brief Defines the IdRated delta to use during estimation
//!
#define USER_IDRATED_DELTA (0.0001)
Figure 6-32 Phase Current Oscillation During Id Rated MeasurementAs can be seen in the oscilloscope plot, even though the current grows much faster, the remaining oscillation does not allow the Id Rated to settle to a stable value. Trying a smaller value, 0.00002 instead of 0.0001 increases the stability of the steady state current as shown in Figure 7-33.
Figure 6-33 Reduced Phase Current Oscillation During Id Rated Measurement