This paper proposes a new model for cogging forces of linear motor systems. Sinusoidal functions of positions are used to capture the largely periodic nature of cogging forces with respect to position effectively while B-spline functions are employed to account for the additional aperiodic part of cogging forces. This model is experimentally demonstrated to be able to capture both the periodic ...

The calculation and reduction of cogging torque are fundamental to the evaluation optimisation motor performance. Considering that accuracy calculated by analytical method (AM) is low, an accurate model effective air-gap length considering actual stator slot structure suitable for any proposed, 6p36s surface-mounted permanent magnet synchronous (SPMSM) accurately verified finite element (FEM). ...

Based on the complex structural characteristics of permanent magnet-assisted synchronous reluctance motors (PMA-SynRMs), this paper proposes a multi-objective optimization design method for motor using composite algorithm. Firstly, power density, electromagnetic torque, cogging and torque fluctuation coefficient were used as targets based parametric analysis data 14 structure variables, where s...

Better torque performance and higher reliability have long been the focus of research for slotted limited-angle motors (LATMs), which are primarily used to position first-stage valves in electrohydraulic servosystems. This paper presents a high axial-flux LATM with quasi-Halbach array improvement including constant range (CTR) output torque. Firstly, structure two sets windings operation princi...

The main objective of aerospace industry is to produce all electric aircraft (AEA) equipped by electrical devices in coming developments. Electrical machines that provide higher torque densities are gaining more interest for researchers obtain sustainable direct-drive propulsion system applications. In addition lesser weight and density, a machine should be “fault tolerant” applied A novel high...