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Firstly, the topology and operation principle of the permanent-magnet BLDC motor for automatic door are researched in the paper. A method for decreasing cogging torque by cooperating of pole number and slot number is given. To increase the inner space utilization rate and the motor efficiency, the double-layer-and-short-pitch windings are employed. Secondly, taking terminal voltage as input, transient...
Permanent magnetic synchronous motor (PMSM) is often the most important element in precision machine tools as the direct dive motor and also a frequent source of vibration and acoustic noise. So this type of PMSM needs smooth rotation with low cogging torque in order to precise localization. This paper presents a general proposal to optimize the performance of an asymmetric PMSM using finite element...
In this paper, two emerging outer-rotor stator-permanent-magnet (PM) brushless motor drives, namely the doubly-salient PM motor drive and the PM hybrid brushless motor drive, are firstly quantitatively compared, which are particularly attractive for serving as in-wheel motor drives for electric vehicles. In order to enable a fair comparison, these two motor drives are designed with the same peripheral...
Discontinuous primary permanent magnet linear synchronous motor (DPPMLSM) has many merits in long-stroke transportation, including vertical, horizontal, and slanted model system, however, detent force of DPMLSM is particularly troublesome requiring positioning accuracy specially at low speed region as well as of position control and is different from short primary type and short secondary type PMLSM...
There are complicated relationships among the radial suspension forces, configuration of windings, permanent magnet thickness and currents in bearingless permanent magnet-type synchronous motors (BPMSM), so researching these relationships has important reference value for designing and optimizing BPMSM. Based on the principle of producing radial suspension forces in BPMSM, the mathematics models of...
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