Permanent magnet-assisted synchronous reluctance motors (PMSRMs) have been widely used in household appliances, national defense and the military, due to their advantages of low cost high efficiency. However, excessive torque ripple cause a series problems, such as vibration noise. To solve this problem, paper first considers important factor that causes ripple—the cogging torque. Firstly, gene...

The spoke-type permanent magnet synchronous motor (PMSM), which is a general ferrite magnetic flux-concentrated motor, has low portion of reluctance torque at the total magnitude. Therefore, as way to increase torque, there double-layer PMSM that can maximize difference in inductance between d-axis and q-axis. However, PMSM, cogging ripple, harmonic distortion (THD) with main cause vibration no...

This paper presents analysis and study of the single-phase transverse-flux machine. The finite element method results machine are compared with laboratory measurements to confirm accuracy computer model. model is then used investigate effect machine’s geometry on its output characteristics. Parametric carried out find optimal air-gap diameter at which cogging torque minimal. In addition, influe...

To develop a fault tolerant machine with the least redundant phases, the inductance model and a nonlinear radial air gap flux density model of a new four-phase doubly salient electromagnetic generator (DSEG) is presented and verified by the finite element analysis (FEA) and experiments result in this paper. With the proposed formulas, a new four-phase 24-slot 18-pole DSEG without cogging torque...

A surface-mounted permanent magnet synchronous motor (SPMSM) is an electric with a simple magnetic circuit design, fast responsiveness, linear torque–current characteristics, speed–voltage and constant operating speed. SPMSMs use only torque; however, interior PMSMs (IPMSMs) have high power densities because they can reluctance torque. In addition, when flux-weakening control used, the range wi...

To obtain a higher level of contouring motion control performance for linear-motor-driven multi-axes mechanical systems subject to significant nonlinear cogging forces, both coordinated control of multi-axes motions and effective compensation of cogging forces are necessary. In addition, the effect of unavoidable velocity measurement noises needs to be carefully examined and sufficiently attenu...

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...