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Design and development of electrical machines require a good accuracy model with a low time process. Compared to finite element analysis and analytical model magnetic Equivalent Circuit (MEC) presents compromise between time process and accuracy. This paper presents two MEC method used to modeling a unipolar permanent magnet synchronous machine (PMSM) (only one permanent magnet per pole pair). Average...
This paper describes an efficient approach for skillfully guiding the magnet reduction design in a single-phase line-start permanent magnet motor (LSPMM) without worsening motor torque and efficiency performances. The relevant decrease of magnet torque due to magnet reduction is compensated by improving the unique hybrid torque characteristic, that enhancing the balance ratio of reluctance torque...
This paper presents the dynamic characteristic analysis of a small sized permanent magnet (PM) type stepping motor with H shape claw-poles using magnetic circuit equation coupled with 3-D finite element analysis (FEA). First, the motor parameter is derived by PM analyzing torque and back-EMF using the 3-D FEA taking account magnetization of PM. Next, the step response characteristic of a PM type motor...
This paper presents aspects of the design solution for a high speed, high efficiency permanent magnet machine used as a motor/generator (M/G) unit in a flywheel energy storage system. The motor is operated in a vacuum with passive cooling; thus the right choice of permanent magnet properties and ability to withstand demagnetization due to the temperature variation and armature reaction is important...
This work presents the results of an investigation on components of the electromagnetic force in the air gap of an 8/6 switched reluctance machine (SRM). Using Maxwell stress method variations of radial and tangential force components with respect to saliency of the machine and saturation effects have been studied. Access to distribution of the force components acting on the rotor and stator enables...
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