中空环形行波超声波电机定子振动解析模型

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Abstract An analytical model of the stator vibration in the hollow ring type traveling wave ultrasonic motor is proposed in order to investigate the impact of the contact between the stator and the rotor on the stator vibration.The stator is equivalent to a circular ring beam with constant thickness according to the structure of the motor.In the equivalent process,the stiffness of the stator teeth is neglected.But the mass contribution of the teeth is lumped into the mass of the stator beam.The free vibration and the forced vibration of the equivalent stator beam are then analyzed based on the analytical method.Different vibration modes and the corresponding frequencies are determined.The forced responses of the stator excited by the applied harmonic voltage and the normal contact force are obtained.The results indicate that the equivalent process is reasonable.The vibration amplitudes of the stator excited by the applied voltage and the normal contact force are linear to the voltage amplitude and the preload force,respectively.The impact of the contact force on the vibration of the stator is relatively small as the value of the preload force is low.The analytical results are compared with the experimental results and good agreements are observed,which verifies the validity of the proposed model.

Key words： Ultrasonic motor stator vibration analytical model contact force

Received: 03 December 2014 Published: 25 May 2015

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TM35

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	Jiang Chunrong
	Lu Danhong
	Jin Long

Cite this article:

Jiang Chunrong,Lu Danhong,Jin Long. An Analytical Model of the Stator Vibration in the Hollow Ring Type Traveling Wave Ultrasonic Motor[J]. Transactions of China Electrotechnical Society, 2015, 30(7): 112-118.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I7/112

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