Abstract: A novel synchronous drive Permanent Magnet Claw Coupling(PMCC) based on magnet repulsion was proposed. Firstly,the structure of PMCC was introduced.Secondly,the structural design problems of PMCC were analyzed.Thirdly,the magnet circuits of PMCC were calculated by finite element simulation software. The influences of some important parameters such as the number of pole pairs,the thickness angle of permanent magnet and the angular gap on torque transfer characteristics of PMCC were analyzed respectively. Finally,the torque curves of PMCC with strong and weak magnetic combination were calculated. The results showed that the transmission torque of PMCC can be increased by increasing number of pole pairs or thickness angle of permanent magnet. When the initial angular gap was increased,the elastic buffering characteristics of PMCC were improved. In addition,when the design scheme of strong and weak magnetic combination is adopted,it can increase the transmission torque and the initial angular gap of PMCC, which provides an important reference for the development and design of PMCC and its application in mechanical transmission system.

Key words: Permanent Magnet Claw Coupling (PMCC), magnet repulsion, angular gap, number of pole pairs, torque