Cogging torque reduction of axial flux permanent magnet brushless dc (PMBLDC) motor is an important issue which demands attention of machine designers during design process. This paper presents magnet notching technique to reduce cogging torque of axial flux PMBLDC motor designed for electric vehicle application. Reference axial flux PMBLDC motor of 250 W, 150 rpm is designed with 48 stator slo...

Show that the force between hemispheres in the left figure is the same as that between one such hemisphere and either a perfectly conducting plate, or a plate of infinite magnetic permeability. This problem was inspired by e-discussions with J. Castro Paredes. The force between two rectangular-prism permanent magnets has been deduced in [1]. For cylindrical magnets, see [2, 3], and for spheres,...

This paper describes a novel approach to capsular endoscopy that takes advantage of active magnetic locomotion in the gastrointestinal tract guided by an anthropomorphic robotic arm. Simulations were performed to select the design parameters allowing an effective and reliable magnetic link between the robot end-effector (endowed with a permanent magnet) and the capsular device (endowed with sma...

Abstract Magnets, or electromagnets, are common components in everyday appliances and widely used medicine, industries, transportation, electrical power systems. It is known that the magnetic field ( B ) can mitigate aggravate metallic corrosion; however, this apparent contradictory effect still not fully understood. In study, we demonstrate a simple method to monitor in-operando of permanent m...

Abstract This is the second of a series papers on new methods for calculation eddy current losses in permanent magnets (PMs) and shortcomings previous analyses. Our first paper extended Ruoho’s work harmonic field distributions to reaction currents within magnets. The approach was based complex AC calculation. In this paper, models presented our are further allow homogeneous fields, including e...