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This paper investigates the influence of the magnetic saturation on the performance of a Synchronous Reluctance Motor (SynRM) at steady-state. In addition, the stability limits for the SynRM are studied using a suggested more accurate method. The saturation and cross-saturation effects on both direct (d) and quadrature (q) axis flux linkages are considered. A Finite Element Method (FEM) is used to...
Performance prediction and control of a synchronous reluctance machine is based on the knowledge of the direct and the quadrature axis inductances. The properties of the machine depend on the saliency ratio of these inductances and this is implemented by introducing internal flux barriers. In an idealized linear magnetic topology the superposition principle would allow to derive both properties separately...
This paper presents comparative studies of magnetic characteristics and dynamic performances for two mutually coupled dual-channel switched reluctance machines (DCSRMs) with the same properties and different winding connections. A 2D/3D finite element method (FEM) is used to analyze the magnetic field distributions and calculate the static inductance and torque characteristics of these two DCSRMs...
This paper proposes a novel control scheme for wide speed range operation of synchronous reluctance motors. The proposed scheme consists of a combination of maximum torque per ampere control, maximum torque per flux control, flux-weakening control and torque limiting. These controls are based on a mathematical model in a rotating reference frame that is synchronized with the stator flux linkage. The...
In this paper the driving principle of a special permanent magnet excited synchronous machine, in the following called the switched permanent magnet reluctance machine (SPM), is discussed. The SPM is a promising variant of the brushless DC (BLDC) machine concerning design and robustness. The mechanical construction is similar to the switched reluctance motor (SRM), whereas the driving characteristics...
This paper deals with the method of driving performance evaluation of interior permanent magnet (IPM) motors with 6-pole NdFeB magnets rotor and 9-slot stator. The circuit parameters of IPM motor such as Ld(d-axis inductance), Lq(q-axis inductance), torque and speed are investigated using 2-d finite element analysis(FEA) in each current value with phase angle condition. The low speed region below...
The objective of this paper is to design and implement a direct-drive position control based on a simplified sinusoidal flux model for a linear variable reluctance motor. The motor under consideration is a three-phase linear motor with strong magnetic coupling between phases that has the advantages of simple structures, compactness and low cost with no permanent magnet. The experimental results show...
The paper describes an experimental method to identify the equivalent circuit parameters of a switched reluctance motor including non ideal effects associated with the magnetic core. The proposed method avoids the use of large capacitors or batteries to reach values of current that guarantee the saturation of the magnetic core, and minimizes the number of power electronic devices. The experimental...
Switched reluctance motors are often running in status of two phases excited simultaneously. Mutual coupling has effects on not only the flux distribution and magnetic saturation, but also the ability of torque output. The two adjacent phases of switched reluctance motor can be excited in two modes, the long-flux-path mode and short-flux-path mode. The calculation method of mutual inductance in two-phase...
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