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A limited short circuit current PM motor is studied based on the segmentation of the rotor magnets. The principle is to reduce the magnetic flux by means of magnets subdivision and an increase of rotor pole number. The effect of magnet segmentation on machine characteristics is analyzed using finite element method (FEM). The short circuit current of designed fault tolerant machine is well limited...
Air-gap magnetic field of electromagnetic continuously variable transmission (EMCVT) is composed by permanent magnet and electromagnetic excitation winding. FEM is adopted to study the three-dimensional airgap magnetic field based on mathematical model. The trust deduced of air-gap magnetic field from FEM is verifield been adjusted by the theoretic prototype. The study shows the magnetic field of...
In order to improve the reliability and output performance of the drive system of electric vehicle (EV), a new type of interior fault-tolerant permanent magnet motor (FTPMM) with centrifugal rotor is proposed, and its systematic characteristics are analyzed. With the proper connection of windings and combination of the number of slots and poles, the capacity of limiting of short-circuit fault current...
This paper gives the design and simulation of a permanent magnet synchronous motor (PMSM) for a super-high speed centrifugal compressor drive application. The PMSM has an output power of 2000 W at 200,000 rpm with 28 V dc power supply. It is designed for operation at a cryogenic temperature of 77 K. The designed PMSM is a 2-pole, 3-phase slotless structure. The permanent magnet is centrally located...
A new on-line identification method of suspension force and magnetic unbalance pull force parameters in buried-type IPM bearingless motors has been presented in this paper. The suspension force parameters depend on the current condition, because armature reaction and magnetic saturation in the stator teeth often occur in this type of machines. Moreover, the magnetic unbalance pull force also generates...
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