ET201: THREE PHASE SYSTEMS (PART 4)

a)                  Three phase emf generation

Let us consider Red (R) phase taken as reference and the coil rotates clockwise as indicated in Figure 1.1.2 (c) to (e), the induced voltage (emf) waveform for R (e_R), Y(e_Y)  and B(e_B)  can be derived separately. Figure 1.1.2 (f) shows the combination of the RYB waveform; therefore it is called the three phase waveform.

Figure 1.1.2. Emf waveform; (c) R phase  (d) Y phase (e) B phase (f) Three phase