Abstract
This paper proposes a new non-magnetic motor with a rotor rotated by using the resonance energy of a bimorph cantilever beam excited by electrostatic force. The use of flexible material enables conversion of translational vibration to rotary movement in one direction. Basic characteristics of a prototype motor with two bimorph cantilever beams, such as rotational speed, output torque, and efficiency were determined experimentally. Results show that a maximum rotational speed of 2800 rpm was obtained without a load torque. It is also observed that this motor produces the output torque of 98 μNm when the rotational speed was 980 rpm. The maximum efficiency was 24% when the input power was 0.065 W.
Highlights
There is an increasing demand for a non-magnetic motor capable of rotation with high promotion torque at strong magnetic field of a super conduction, a medical care such as the MRI, and a magnetoence phalography
Many studies have investigated the mechanisms of the motor using non-magnetic devices such as an electrostatic element [1]-[3], an electrorheological fluid [4], a shape memory alloy [5], a magnetostrictive element [6], and a combination of a frictional force and an electromagnetic force [6] [7]
We propose a new non-magnetic motor of a stick type which combined the electrostatic force and mechanical resonance of a multilayer piezoelectric cantilever beam such as a bimorph cantilever beam
Summary
There is an increasing demand for a non-magnetic motor capable of rotation with high promotion torque at strong magnetic field of a super conduction, a medical care such as the MRI, and a magnetoence phalography. (2015) A New Motor of Stick Type with Coupled Mechanical Vibration of Bimorph Beam and Frictional Force. The ultrasonic motor is used for an electric appliance and a robot widely because the control characteristics are superior This motor is very expensive a cycle of the use is short. We propose a new non-magnetic motor of a stick type which combined the electrostatic force and mechanical resonance of a multilayer piezoelectric cantilever beam such as a bimorph cantilever beam. The stick type motor with two bimorph cantilever beams was fabricated, and the influence of each parameter on load torque and efficiency properties was considered
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