A sixteen-pole eighteen-slot (16p/18s) permanent magnet synchronous motor (PMSM) developed in Korea Electrotechnology Research Institute (KERI) for a vertical articulated robot is chosen as reference model, and other two pole/slot combinations (20p/18s, 20p/24s) are together compared terms of electrical mechanical performance. Radial force density varying time space decomposed through Fast Four...

This paper proposes a general design method of modular multiphase permanent-magnet synchronous machine with hybrid single/double layer (HL) fractional-slot concentrated winding (FSCW), which indicates that double-layer (DL) FSCW machines satisfying two preconditions can be transformed into HL machines. different slot and pole number combination are designed to prove the feasibility universality...

In this paper, two types of dual permanent magnet (PM) machines, i.e., stator slot dual-PM (SSDPM) machine and split-tooth (STDPM) machine, are investigated compared. Both machines have consequent pole structure with Halbach array PMs. Their difference lies in the position PM. The SSDPM has PMs slots, while STDPM between split teeth. Torque characteristics, average torques torque ripples, diffe...

scoure is the removal of particle sediment which results variation of flow pattern. local scour is considered as one of the reasons of instability and ultimately failure of bridges.therefore, proposing some controlling methods to reduce this phenomenon is essential. in the study, effects of two types of squar and circular collar on a single cylindrical model have been investigated. in the next ...

To solve the problem that it is difficult to accurately identify rotor eccentric fault, demagnetization fault and hybrid of a permanent magnet synchronous motor (PMSM) with slot pole ratio 3/2 several times it, this paper proposes method based on combination branch current analysis machine learning algorithm. First, electrical signal PMSM after various types faults shows there are differences i...

Abstract The permanent magnet motor will inevitably produce cogging torque because of its inherent structure, which cause vibration and noise affect application in certain high-precision applications. Firstly, considering the actual structure stator, a general analytical model is obtained by energy-based approaches. On basis further derivation expressions with different segmented pole structure...

This article presents a novel parallel-excited dual-PM reluctance machine with enhanced torque and efficiency performance. The key is to build an integrated magnetic field two sets of PM excitation sources in both stator yoke slot openings. Two produce parallel field, which contributes superimposed flux the airgap, thus leading strengthened variation, improved back-EMF torque. Additionally, spe...