As already described in Chap. 6, the principle operation of the permanent magnet excited rotating field machine is like follows:
The synchronous machine contains permanent magnets to generate the excitation field, but there is no starting cage present. The three-phase machine is supplied by an inverter which realizes a three-phase current system. As a main difference to what is described in Chap. 6, here no limiting assumptions concerning the time-dependency of the currents is made (especially there is no need for sinusoidal currents).