Abstract
A novel bearingless segmented switched reluctance motor (BSSRM) is proposed in this paper to solve the coupling problem of the traditional bearingless switched reluctance motor (BSRM). Different from traditional BSRMs, the proposed BSSRM adopts the double stator and segmented rotor structure, thereby making the motor operate in short flux paths and the magnetic flux path isolated between torque and suspension system. On the basis of introducing the structure and working principle of the BSSRM, the mathematical model of torque and suspension force is deduced. The 2D finite element simulation model is established by the Ansoft software. The influence of structural parameters on torque and suspension system is analyzed, and its electromagnetic characteristic and decoupling characteristic are analyzed. Compared with the double stator bearingless switched reluctance motor (DSBSRM), the BSSRM not only improves the torque and suspension output but also weakens the coupling between torque and suspension system. Finally, the simulation results verify the effectiveness of the BSSRM.
Highlights
Bearingless switched reluctance motor (BSRM) inherits high-speed performance and adaptability to harsh environment of SRMs, and takes advantages of magnetic bearing with low loss and no friction [1]–[4]
COMPARISON OF CHARACTERISTICS In order to further verify the excellent performance of bearingless segmented switched reluctance motor (BSSRM), the electromagnetic performance and decoupling performance of double stator bearingless switched reluctance motor (DSBSRM) are compared
The BSSRM has a great improvement of decoupling performance in torque and suspension system
Summary
Bearingless switched reluctance motor (BSRM) inherits high-speed performance and adaptability to harsh environment of SRMs, and takes advantages of magnetic bearing with low loss and no friction [1]–[4]. Reference [18] proposed a double stator bearingless switched reluctance motor (DSBSRM), which the suspension and torque windings are respectively wound on the inner and outer stators. It can effectively overcome the coupling between suspension and torque compared with the hybrid stator BSRM.
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