Full‐period suspension force accurate modelling for a novel bearingless switched reluctance motor

Abstract

In the traditional bearingless switched reluctance motor (BSRM) system, the electromagnetic coupling between the torque system and suspension system is unavoidable. In this Letter, the present BSRM has the advantages of electromagnetic decouple with independent torque-suspension magnetic circuit design. However, the further in-depth study shows that the BSRM has an obvious suspension force fluctuation according to its asymmetry structure. Thus, it is necessary to build an accurate suspension force mathematical model considering commutation ripple. In this frame, a magnetic field segmentation method is proposed and the accurate suspension force model is built with Maxwell stress method and its reliability and precision are verified, modified based on finite element analysis.

H∞optimal control of vehicle active suspension systems in two time scales

“…In order to pursue the comfort and safety of vehicles, more and more researchers have focused on the design and control of active suspension in the past decades [1][2][3]. As we all know, suspension is the general term of all force transmission connecting devices between the vehicle frame (or load-bearing body) and the axle (or wheel).…”

Principles and Implementation of a Novel Radial-Anti-Disturbance Bearingless Switched Reluctance Motor

“…In order to realize the decoupling of magnetic torque and suspension force in BSRM, scholars at home and abroad tried to study some new types of motor topology [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. A single winding hybrid rotor bearingless switched reluctance motor (HRBSRM) was proposed in document [11], whose rotor was composed of annular laminations and fan laminations in the axial direction.…”

“…The annular lamination part enhanced the radial load capacity of the hybrid rotor at the noncoincidence position of stator and rotor poles, but made the complexity of magnetic field topology increased, and there still existed a large coupling between torque and suspension force. Reference [13] studied an asymmetry bearingless switched reluctance motor (ABSRM), in which the suspension force ripple is obvious with the change of rotor position in a full-period. Based on reference [13], a hybrid excitation outer rotor bearingless flywheel motor was studied [14], which exhibits the advantages of high integration and low loss due to outer rotor direct-drive technologies.…”

“…Reference [13] studied an asymmetry bearingless switched reluctance motor (ABSRM), in which the suspension force ripple is obvious with the change of rotor position in a full-period. Based on reference [13], a hybrid excitation outer rotor bearingless flywheel motor was studied [14], which exhibits the advantages of high integration and low loss due to outer rotor direct-drive technologies. Reference [15] studied a decoupling control method for 6/2 pole hybrid rotor bearingless switched reluctance motor.…”