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Linear permanent magnet (PM) motors have increasingly been used in high-performance applications where high accuracy and fast dynamic response are required. However, the presence of cogging force in linear motors compromises position and speed control accuracy, which can be particularly troublesome at low speeds. This paper presents analysis and minimization of cogging force associated with a tubular...
In this paper, an axial-radial flux compound-structure permanent-magnet synchronous machine (CSPMSM) which consists of one axial-flux PMSM and one radial-flux PMSM is investigated. The purpose of this kind of machine is to keep the internal combustion engine (ICE) operating at maximum efficiency by harmonizing its two machines during all driving cycles in hybrid electric vehicle (HEV), and therewith...
The increase of pole pairs numbers of the interior permanent magnet (IPM) synchronous machine with "flux concentration structures" can boost its air gap flux density, raise its efficiency and torque, and reduce its volume and weight. But there exists a suitable value. With the help of geometry module, this paper analyzes the relation between "flux concentration function" and the...
The interior permanent magnet (IPM) machine, which enjoys advantages such as high efficiency and torque, is widely used not only in home application like air conditioners but also in electric vehicles. Its leakage flux is bigger than surface mounted permanent magnet (SPM), however, because the magnetization direction of permanent magnet is plumb to axes of air gap flux and far away from air gap. In...
The increase of pole pairs numbers of the interior permanent magnet (IPM) synchronous machine with "flux concentration structures" can boost its air gap flux density, raise its efficiency and torque, and reduce its volume and weight. But there exists a suitable value. With the help of geometry module, this paper analyzes the relation between "flux concentration function" and the...
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