In this study, a direct drive in-wheel system is proposed as high power density for reducing the intermediate parts, such speed reducer by increasing torque. We propose design strategy to show that multipolarization and improvement of gap magnetic flux can effectively increase density. A Halbach array magnet rotor combines main electrode magnets spoke with core adopted technique improving compa...

This paper investigates the performance enhancements of permanent magnet Vernier machines (PMVMs) that can be achieved using a new structure Halbach array magnets (HAPMs) for direct-drive motorcycle application. To start with, size and design specifications electric machine are determined based on assumed acceleration drive cycle motorcycle. Then, five-segment (HAPMVMs) with two different slot/...

A magnetic levitation isolation system applied for the active control of micro-vibration in space requires actuators with high accuracy, linear thrust and low power consumption. The magneto-force-thermal characteristics traditional electromagnetic are not optimal, while a Halbach array can converge induction lines enhance unilateral field. To improve effect, an accurate field analytical model i...

This study is concerned with the magnetic force models of magnetic bearing in a flywheel energy storage system (FESS). The magnetic bearing is of hybrid type, with axial passive magnetic bearing (PMB) and radial hybrid magnetic bearing (HMB). For the PMB, a pair of ring-type Halbach arrays of permanent magnets are arranged vertically to support the rotor weight. For the HMB, a set of ring-type ...

Magnetic bearings are an attractive alternative to mechanical bearings in flywheel energy storage systems since they greatly reduce friction and wear. However, new problems are introduced in terms of stabilization; particularly the magnetic bearing must provide enough damping to reduce excessive vibrations. Two novel configurations of passive magnetic bearings are introduced to meet system requ...

A Halbach cylinder, fabricated from pre-magnetized sintered NdFeB magnet segments, is proposed for the powder aligning system during the compression or injection moulding of anisotropic bonded Halbach oriented NdFeB ring magnets. The influence of leading design parameters of the powder aligning system, viz. the number of magnet segments per pole, their axial length and radial thickness, and the...