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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...
Recently, electric motors are required to show high efficiency/power/torque within low cost/size and noise in every application field, such as home appliance and industrial field. This paper proposed a design method that can result in motors that show low-cost and high output characteristics. An optimally designed flat type IPMSM and a V type IPMSM was design. For the design, a novel method considering...
This paper presents a novel multi-pole permanent magnet synchronous machine for the traction applications in which both high torque capability at low speed and wide speed operating range are required. The origin of the proposed machine construction is from a hybrid stepper machine, but the uniqueness lies in the utilization of soft magnetic composites (SMC) as magnet flux bypass core and filed-pole...
To provide a low cost driven force with high operational precision in semiconductor manufacturing industry, a micro axial flux switched-reluctance motor (muA FSRM) that can be integrated with the microelectromechanical system (MEMS) fabrication scheme has been designed and investigated. With both the degraded material property after electroplating process and the geometric constraints of MEMS constructions...
In this paper, new stator pole tip geometry has been investigated. The new stator pole tip and conventional stator pole tip SRM are analyzed using finite element analysis (FEA). It is observed that a small change in stator pole tip geometry results in a significant change in the characteristics of motor. The new stator pole tip results in more flux linkages and hence more saturation of motor at same...
Previous work has shown that it is possible to design surface permanent magnet (SPM) synchronous machines using fractional-slot concentrated windings to achieve wide speed ranges of constant-power operation. A closed-form analytical technique is now available to rapidly analyze candidate SPM machine designs using concentrated windings and tune them to meet the critical condition for optimal flux weakening...
Permanent magnet motors are widely used in drive technology. The use of ferrite magnets in this type of machine is attractive due to their low cost, but its performance is usually poor due to the low flux density in the airgap. A new topology for the magnetic circuit is proposed, which uses the concept of axial flux concentration. It enables a substantial increase in the flux per pole, even with ferrite...
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