FOC Math Library

Set of Math Functions

FOC requires a number of mathematical functions to process vectors and to handle the raw signals coming from the motor power board.

The following list includes the main functions:

• LPF: first- or second-order on-the-fly programmable low-pass filter. This is a simple IIR (infinite impulse response) digital filter.
• Clarke transform: used to convert the measured three-phase currents and voltages into a two-phase system.
• Park transform (and inverse): used to rotate vectors, mainly for converting quantities between the rotor and stator reference frames.
• SIN/COS: sine and cosine functions.
• ATAN2: arctangent function.
• RecToPol: rectangular-to-polar coordinate conversion.