Bi-modes alternation stepping ultrasonic motors |
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Authors: | Jiamei JIN Chunsheng ZHAO |
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Affiliation: | (1) Precision Drive Laboratory, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China |
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Abstract: | Based on the principle of alternative operation of two bending vibration modes in an annular stator, this paper presents a
standing-wave stepping ultrasonic motor characterized by no accumulative errors driven by an open-loop control circuitry.
The driving forces are generated from the motions of projections on the stator in two modes. The positioning of the motor
is achieved by the cooperation between the stator projections and rotor teeth, and the number of the rotors determines the
stepping angle of the motor. Two-phase sinusoidal signals corresponding to the two modal frequencies drive the motor bi-direction
stepping rotation via a switch unit. The prototype runs steadily without miss-step on trial. The single-step angle displacement
of the motor is 2.5°.
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Translated from Journal of Nanjing University of Aeronautics and Astronautics, 2006, 38(5): 600–604 译自: 南京航空航天大学学报] |
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Keywords: | ultrasonic motors stepping standing-wave frequency conversion |
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