Publisher’s Note: “Novel piezoelectric rotary motor driven by a single-phase sine wave with an asymmetric stator” [Rev. Sci. Instrum. 90, 075006 (2019)]

A novel piezoelectric rotary motor (PRM) on the basis of synchronized switching control was designed, fabricated, and tested to achieve high speed, high efficiency, and high torque. The new motor mainly consists of a vibrator working in the resonance state as the driving element of the PRM and a clutch working in the quasi-static state to control the shaft for unidirectional rotation. The finite element method software COMSOL Multiphysics 5.4 was used to design the structure of the motor and determine the feasibility of the design mechanism of the PRM. Moreover, an experimental setup was built to validate the working principles and evaluate the performance of the PRM. The prototype motor outputted a no-load speed of 7.21 rpm and a maximum torque of 54.4 N mm at a vibrator driving voltage of 120 Vp–p and a clutch driving voltage of 200 Vp–p. The motor achieved a net efficiency of 15.6% under the preload torque of 3 N mm. The average stepping angle of the motor with no-load was 0.068°, when the voltages applied to the clutch and the vibrator were 200 Vp–p and 120 Vp–p, respectively, with the frequency of 512 Hz.

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Novel piezoelectric rotary motor on the basis of synchronized switching control

Zhang

Wang

et al. 2020

Review of Scientific Instruments

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Resonant-Type Piezoelectric Screw Motor for One Degree of Freedom Positioning Platform Application

Zhang

et al. 2020

IEEE Access

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A resonant-type piezoelectric screw motor for one degree of freedom (1-DOF) positioning platform is proposed, fabricated, and investigated in this article. The motor comprises a driver and a screw rod. The driver is composed of four transducers, a nut seat, and a flange nut. The flange nut is bolted connected on the nut seat, and the four piezoelectric transducers are connected with the nut seat by right-angle flexible hinges. Each piezoelectric transducer comprises two piezoelectric stacks and one displacement amplifier. Driven by the four piezoelectric transducers, elliptical vibration is generated by the driver, which is used to actuate the screw rod to realize the linear movement. The driver is analyzed using the finite element analysis software ANSYS. The proposed motor and positioning platform prototype are manufactured, assembled, and tested. The performance of the developed piezoelectric screw motor shows its applicability and effectiveness for the 1-DOF positioning platform with a large force. Experiments demonstrate that the maximum velocity of this motor is 10.53 mm/s without mechanical load and the maximum output force of the platform can reach 17.19 N when the excitation voltage is 230 V p-p at 365 Hz.

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Publisher’s Note: “Novel piezoelectric rotary motor driven by a single-phase sine wave with an asymmetric stator” [Rev. Sci. Instrum. 90, 075006 (2019)]

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Novel piezoelectric rotary motor on the basis of synchronized switching control

Novel piezoelectric rotary motor on the basis of synchronized switching control

Resonant-Type Piezoelectric Screw Motor for One Degree of Freedom Positioning Platform Application

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