In this paper, a novel mechanical flux-weakening design of spoke-type permanent magnet generator for stand-alone power supply is proposed. By controlling the position adjustable modulator ring mechanically, total induced voltage, i.e., amplitude back EMF vector sum can be effectively adjusted accordingly by modulation effect. Consequently, variable-speed constant-amplitude voltage control (VSCA...

Interior permanent-magnet synchronous machines are widely spreading in automotive and vehicle traction applications, because of their high efficiency over a wide speed range. This capability can be achieved by appropriated control strategies: Maximum Torque per Ampere (MTPA), Flux Weakening (FW) Volt (MTPV). However, these trajectories often based on an simplified magnetic model the electrical ...

This paper presentsan investigation of a 3D-magnetic flux permanent magnet synchronous motor (3D-MF PMSM) used for electric vehicle applications. The investigated 3D-MF PMSM consists an integrated radial-flux and axial-flux structure. It has two air-gaps air-gaps, as well toroidal winding wound stator. structure helps to concentrate all the within maximize torque production. Moreover, there are...

We report a dramatic variability event in the X–ray history of the Narrow–Line quasar PHL 1092 (z = 0.396). Our latest 2008 XMM–Newton observation reveals a flux drop of ∼ 200 with respect to the previous observation performed about 4.5 years earlier, and a drop of ∼ 135 with respect to its historical flux. Despite the huge X–ray variation, the UV flux remains constant producing a very signific...

The main objective of this work focuses on an electromagnetic analysis axial flux topology machine with mixed excitation system to meet the requirements electric traction system, whose speed ratio in field weakening region is 1:2. methodology employed consists elaboration a magnetic equivalent circuit and subsequent simulation device using Finite Element Method via numerical solving software.

Variable speed, permanent magnet synchronous machines with hybrid excitation have attracted much attention due to their flux-control potential. In this paper, a design of axial flux iron poles in the rotor and an additional electrically controlled source fixed on stator is presented. This paper shows results pertaining air-gap control, electromagnetic losses, torque, back emf efficiency maps ob...