Variable speed FOC motor drive

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joe brislin
joe brislin 2014-1-29
回答： Joel Van Sickel 2020-12-1
The user guide of Simpower systems has a demo file of variable speed FOC motor drive. Reference : Building Your Own Drive : Systems with electric drives.
On referring to the model implemented, the formulas used for 'iqs* calculation' and 'Teta calculation' use phir for calculation purpose. The function block shows that a value of 1e-3 mWb is added to Phir value. The value has not been indicated in the formulas expressed below. I need to know, why that value of 1mWb has been added to Phir value in calculation.

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Joel Van Sickel
Joel Van Sickel 2020-12-1
This is a simple trick to avoid divide by 0.
This answer is part of a MATLAB Answers cleanup effort for unanswered questions that are outstanding.

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