Design of speed regulation system based on fivephase permanent magnet machine with outer rotor

As the rotational inertia of outer rotor electric machine is higher, the machine responds to the given speed slowly, so it's essential to introduce a speed regulation system to improve its dynamic performance. In this paper, the SVPWM algorithm is adopted. Based on this theory, U
d3
and U
q3
are controlled to be zero and I
q1
is adjusted to regulate the speed. Moreover, intermediate frequency range can reflect dynamic performance. Hence, this paper proposes the speed regulator based on intermediate frequency to improve system's dynamic performance. Finally, the experimental results show the method is effective.