title: Temperature evaluation of traveling-wave ultrasonic motor considering interaction between temperature rise and motor parameters.
abstract: In this paper, a novel model for evaluating the temperature of traveling-wave ultrasonic motor (TWUSM) is developed. The proposed model, where the interaction between the temperature rise and motor parameters is considered, differs from the previous reported models with constant parameters. In this model, losses and temperature rises of the motor were evaluated based on the temperature-related varying parameters: the feedback voltage Vaux of the stator, dielectric permittivity ɛ and dielectric loss factor tanδ. At each new temperature, Vaux, ɛ and tanδ were updated. The feasibility and effectiveness of this proposed model was verified by comparing the predicted temperatures with the measured one. The effects of driving voltage, driving frequency and ambient temperature on the predicted temperature were also analyzed. The results show that the proposed model has more accurate predicted temperature than that with constant parameters. This will be very useful for the optimal design, reducing the heat loss, improvement of control and reliability life of TWUSM.
authors.affiliation: Department of Instrument Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China. Electronic address: shiyangli@sjtu.edu.cn.
authors.forename: Shiyang
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Instrument Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
authors.forename: Wenchu
authors.initials: W
authors.lastname: Ou
authors.affiliation: Department of Instrument Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Yang
authors.affiliation: Department of Instrument Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Guo
authors.affiliation: Department of Instrument Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
authors.forename: Cunyue
authors.initials: C
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, China.
authors.forename: Junhui
authors.initials: J
authors.lastname: Hu
keywords: Interaction; Temperature evaluation; Ultrasonic motor; Varying parameters