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Tubular linear motor has many favorable features, like quick response, strong output, suitable for narrow installation space, et al, so it is widely used for the linear electromechanical servo systems. But, the tubular linear motor design constraints by a plurality of structural parameters, so there are some problems, for example output force cannot meet the needs and large power fluctuation. In order...
An interior permanent-magnet synchronous motor (IPMSM) used for high-performance industrial servo applications is investigated. Compared with surface mounted PMSM, the IPMSM features simple fixing of permanent magnets. However, torque ripple reduction is still an important issue. Three rotor structures are comparatively studied by the finite-element method (FEM) in this paper. The optimizations of...
A novel brushless compound-structure permanent-magnet synchronous machine (CS-PMSM) is proposed in this paper. The structural characteristics are described and the operation principle is introduced. The equivalent magnetic circuit of the BDRM is established, and the electromagnetic torque is deduced by analytical method. The new type of brushless CS-PMSM consists of one stator machine (SM) and one...
A high power density axial flux permanent magnet linear synchronous machine and the stirling system will be introduced. This machine is a tubular axial flux permanent magnet machine. It comprises two parts: stator and mover. With the 2D finite-element method (FEM), the high power density axial flux permanent magnet linear synchronous machine will be analyzed and designed. To get the high power density...
A radial-radial flux compound-structure permanent-magnet synchronous machine (CS-PMSM) is an electromagnetic transmission which is integrated by two concentrically arranged electric machines. As the two electric machines share a rotor as structural and magnetic common part, their magnetic paths are coupled. The magnetic-path coupling may cause the magnetic-field interference of the two machines, which...
A compound-structure permanent-magnet synchronous machine (CS-PMSM) system is a power train concept used in hybrid electric vehicles (HEVs). It can help an internal combustion engine (ICE) to realize a full control of torque and speed independent of road conditions, thus increasing efficiency, decreasing emissions and fuel consumption. The key part CS-PMSM is an integration of two permanent-magnet...
A compound-structure permanent-magnet synchronous machine (CS-PMSM) is a solution to realize both the torque and speed control of the internal combustion engine (ICE) for hybrid electric vehicles (HEVs). This article investigates a CS-PMSM that is integrated by two axial flux permanent-magnet synchronous machines (one stator machine (SM) and one double-rotor machine (DRM)). The magnetic coupling between...
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...
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