Hybrid excited claw pole generator with skewed and non-skewed permanent magnets

Abstract

This article contains simulation results of the Hybrid Excited Claw Pole Generator with skewed and non-skewed permanent magnets on rotor. The experimental machine has claw poles on two rotor sections, between which an excitation control coil is located. The novelty of this machine is existence of non-skewed permanent magnets on claws of one part of the rotor and skewed permanent magnets on the second one. The paper presents the construction of the machine and analysis of the influence of the PM skewing on the cogging torque and back-emf. Simulation studies enabled the determination of the cogging torque and the back-emf rms for both: the strengthening and the weakening of magnetic field. The influence of the magnets skewing on the cogging torque and the back-emf rms have also been analyzed.

Keywords

• claw pole machine
• cogging torque
• electric machines
• hybrid excitation
• permanent magnets
• wind turbine
• 88.50.g-
• 88.50.gj
• 88.50.gm
• 88.50.mp