Analysis of torque fluctuation characteristic for toroidal electromechanical drive

Article type: Research Article

Authors: Liu, Xin^a; | Sun, Maopu^a | Chen, Xiaoxia^a

Affiliations: [a] Tianjin Key Laboratory of Modern Electromechanical Equipment Technology, Tianjin Polytechnic University, Tianjin 300387, China

Correspondence: [*] Corresponding author: Xin Liu, No. 399, Binshuixi Road, Xiqing District, Tianjin, PR China. Tel.: (+86)15332188133; Fax: +86 022 83955258; E-mail: [email protected]

Abstract: In toroidal electromechanical drive, torque fluctuation has important influences on the operational performance of the drive system. In this study, the equations of the electromechanical coupled forces and the output torque for the drive are presented by means of electromagnetic theory and mechanical principle. The influence factors of output torque are analyzed. There are periodic changes in output torque and the change mainly depends on the face width angle of the worm and the tooth number of planet. The changes of the output torque are analyzed and classified into four cases. The pulsed and continuous modes of torque change along with rotating angle are presented as well. The fluctuation ratios of the drive system are calculated quantitatively. Results show that the face width angle of the worm has obvious effect on output torque and its fluctuation ratio. The results are useful for optimal design of the drive and controller design for its periodic fluctuation.

Keywords: Toroidal, electromechanical drive, output torque, fluctuation

DOI: 10.3233/JAE-180010

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 58, no. 4, pp. 497-512, 2018