5 Coordinate Transforms

Through a series of coordinate transforms, users can indirectly determine and control the time invariant values of torque and flux with classic 'PI' control loops. The process begins by measuring the 3-phase motor currents. In practice, the instantaneous sum of the three current values is zero. Therefore, by measuring only two of the three currents, we can determine the third, which reduces hardware costs by eliminating the need for a third current sensor.