The next task of the FOC algorithm is to do away with the sine waves, which requires one important input—the rotor position. We see in the diagram that this value is fed to the Park-transform block as ...

Figure 2 shows a block diagram of the sensorless FOC algorithm. 2. The sensorless FOC algorithm eliminates an expensive encoder, but it’s computationally intensive. (Source: TI “InstaSPIN FOC ...