scholarly journals A Full-Period Mathematical Model for a Hybrid-Rotor Bearingless Switched Reluctance Motor

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2383
Author(s):  
Zeyuan Liu ◽  
Mei Chen ◽  
Yan Yang ◽  
Chengzi Liu ◽  
Hui Gao
Keyword(s):  
Mathematical Model ◽  
Switched Reluctance Motor ◽  
Radial Force ◽  
Magnetic Bearing ◽  
Stable Operation ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Full Period ◽  
Pulling Force ◽  
Straight Lines

A bearingless switched reluctance motor (BSRM) has the combined characteristics of a switched reluctance motor (SRM) and a magnetic bearing. The hybrid-rotor BSRM (HBSRM) discussed in the paper has a twelve-pole stator and an eight-pole hybrid rotor, which is composed of a cylindrical rotor and a salient-pole rotor. Although the asymmetry of the hybrid rotor makes the structure and magnetic field of the HBSRM more complex, it can always produce a significant amount of magnetic pulling force to levitate a rotor shaft at all the rotor angular positions of each phase, which is not available in a traditional BSRM. The classical mathematical model for a conventional BSRM is valid only when its rotor rotates from the start of the overlap position to the aligned position, and the radial force and torque derived from this model are discontinuous at the aligned positon, which is harmful to the motor’s stable operation. In this paper, a full-period mathematical model on the assumption that the gap permeance is cut apart by straight lines or improved elliptical lines for a 12/8-pole HBSRM is provided. On the basis of this mathematical model, the continuity of the radial force and torque at all the rotor angular positions can be guaranteed, and the fine characteristics of this mathematical model have been verified by simulations.

Modeling and suppression of unbalanced radial force for in-wheel motor driving system

2021 ◽  
pp. 107754632110260
Author(s):  
Zhaoxue Deng ◽  
Xu Li ◽  
Tianqin Liu ◽  
Shuen Zhao
Keyword(s):  
Electromagnetic Force ◽  
Switched Reluctance Motor ◽  
Radial Force ◽  
Force Amplitude ◽  
Switched Reluctance ◽  
Driving System ◽  
Coupling Relationship ◽  
Force Fluctuation ◽  
Reluctance Motor ◽  
Road Excitation

Considering the negative vertical dynamics effect of switched reluctance motor on an in-wheel motor driving system, this article presents a modeling and suppression method for unbalanced radial force of the in-wheel motor driving system. To tease out the coupling relationship within the in-wheel motor driving system, this investigation, respectively, explores the principle of unbalanced radial force and the coupling relationship between rotor eccentricity and road excitation based on the suspension response model with unbalanced radial force under road excitation. The switched reluctance motor nonlinear analytical model was fitted by the Fourier series, and its radial electromagnetic force was modeled and analyzed by the Maxwell stress tensor method. To mitigate the influence of radial electromagnetic force fluctuation and unbalanced radial force amplitude value under eccentricity condition on the in-wheel motor driving system, the elitist non-dominated sorting genetic algorithm was adopted to improve radial electromagnetic force fluctuation and unbalanced radial force amplitude value of the switched reluctance motor. The simulation results show that the proposed optimization method can suppress the radial electromagnetic force fluctuation and unbalanced radial force amplitude value, and the negative effect of vertical dynamics of the in-wheel motor driving system is conspicuously mitigated.

Mathematical Model of Linear Switched Reluctance Motor with Mutual Inductance Consideration

2015 ◽  
Vol 6 (2) ◽  
pp. 225 ◽  
Author(s):  
Nikolay Grebennikov ◽  
Alexander Kireev ◽  
Nikolay Kozhemyaka
Keyword(s):  
Mathematical Model ◽  
Switched Reluctance Motor ◽  
Mutual Inductance ◽  
Mutual Interaction ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Linear Switched Reluctance Motor ◽  
Positive Effect

<p>This paper presents developing an mathematical model for linear switched reluctance motor (LSRM) with account of the mutual inductance between the phases. Mutual interaction between the phases of LSRM gives the positive effect, as a rule the power of the machine is increased by 5-15%.</p>

scholarly journals Radial Force and Acoustic Noise Reduction for Switched Reluctance Motor with Hole inside Pole

2003 ◽  
Vol 123 (12) ◽  
pp. 1438-1445 ◽  
Author(s):  
Masayuki Sanada ◽  
Kazuaki Nakata ◽  
Shigeo Morimoto ◽  
Yoji Takeda ◽  
Hiroyuki Yamai
Keyword(s):  
Noise Reduction ◽  
Acoustic Noise ◽  
Switched Reluctance Motor ◽  
Radial Force ◽  
Switched Reluctance ◽  
Reluctance Motor

Mathematical Modeling and Simulation of Spherical Switched Reluctance Motor with Magnetic Levitation

2012 ◽  
Vol 184-185 ◽  
pp. 1618-1622
Author(s):  
Fan Zhang ◽  
Li Zeng ◽  
Ye Juan Yang
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Modeling And Simulation ◽  
Magnetic Levitation ◽  
Switched Reluctance Motor ◽  
Switched Reluctance ◽  
Spherical Motor ◽  
Stable Suspension ◽  
Reluctance Motor

This paper presents a spherical switched reluctance motor with magnetic levitation on the basis of suspension theory and minimum reluctance principle. The elements and mechanism of the spherical switched reluctance motor with magnetic levitation, deduces and calculates the magnetic conduction of the gap by means of the magnetic segmentation are analyzed, and a mathematical model of spherical motor is obtained. With the Matalab/simunik simulation, the results show that the rotor realizes quick stable suspension and rotation, and has excellent antijamming performance as well.

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