Abstract
In this paper, an analytical method based on the series transform and skewed slot structure of rotor is adopted to reduce the cogging torque of the variable flux memory permanent magnet (VFMPM) machine. Firstly, the theory analysis of the cogging torque of the VFMPM machine was completed. Secondly, a simulation model of the VFMPM machine was established, aiming at calculating the cogging torque of the VFMPM machine and verifying the correctness of the above analytical method. Thirdly, a prototype of 14 rotor slots and 12 stator slots of the VFMPM machine was manufactured, and the experimental results of the cogging torque of the VFMPM machine further verified the effectiveness of the above mentioned theory analysis. Besides, the load force of the VFMPM machine including the cogging torque was also tested and analyzed in this paper.
Highlights
As a kind of flux switching machine, the variable flux memory permanent magnet (VFMPM) machine suffers from the effect of cogging torque fluctuation
It is assumed that only one tooth exists in the inner stator core of the VFMPM machine, which is named as the 0th stator tooth; the corresponding cogging torque of the VFMPM machine can be expressed as
This paper proposed an analytical expression to uncover one method of cogging torque reduction of the VFMPM machine
Summary
Since the structure of rotor and stator of the flux switching machine is the salient pole type, the air-gap flux density of the flux switching machine is higher than some other kinds of machines [1,2,3] In this condition, the magnetic saturation occurs in the teeth end of flux switching machine’s rotor and stator, which produces the cogging torque fluctuation when the flux switching machine is working [4,5]. The main work of this paper is to investigate the cogging torque reduction of the VFMPM machine, including the working condition of enhanced flux and weakened flux. A simulation model was established to calculate the cogging torque of the VFMPM machine in different flux regulation conditions (enhanced flux and weakened flux), and verify the validation of the above analytical method preliminarily. The load force of the VFMPM machine, including the cogging torque, were tested and analyzed in this paper
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
