Stator structure for reducing noise in switched reluctance motor

A review of research on vibration and noise reduction in switched reluctance motors

“…Sun Jianbo proposed a new structure grooved at the trailing edge of the rotor core as shown in Figure 4, which achieves the purpose of reducing the radial force of the motor at the expense of some of the torque, but the trade-off between the two motor performance indicators of radial force and torque can be found [10] . Kotegawa T proposed a stator structure with trapezoidal tips and conical yokes, and the experimental results show that this structure reduces the maximum displacement of the stator surface by 42% and achieves vibration and noise reduction [11] . Most related studies have shown that grooving in the stator yoke has a better vibration and noise reduction effect than grooving in the stator tooth [12] .…”

Numerical Investigation on Vibration Performance of an Improved Switched Reluctance Machine with Double Auxiliary Slots

“…On the one hand, the optimization of machine structure was carried out to reduce the radial EMF and weaken the vibration by adjusting structural form and size that affect the vibration characteristics. In the aspect of optimization on the stator structure, Kotegawa and Miki [7] proposed an innovative stator structure to effectively reduce the deformation and vibration and revealed the relationship between the sound pressure level and the maximum displacement of the stator. Davarpanah and Faiz [8] established a novel stator structure with c-type core, which not only can effectively reduce the core loss because of the shortest main magnetic flux path at the stator teeth, but also generate positive torque on two teeth on the same stator phase, as the rotor rotates from the misaligned position to the aligned position.…”