A linear piezo-electric ultrasonic motor using a single flexural vibrating bar for electro-discharge system industrial applications

Shafik, Mahmoud; Shehab, Essam; Abdalla, Hassan

doi:10.1007/s00170-009-1955-5

Cited by 9 publications

(8 citation statements)

References 19 publications

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“…2. The longitudinal and bending vibration modes are coupled by asymmetry of the piezoelectric ceramic vibrator [4,14,16]. The vibration energy across the PZT ring causes the titanium rods, A, B and C to have elliptical micro motion causing the rotor to move in 3D.…”

Section: Proposed 3d Usm Design and Structurementioning

confidence: 99%

“…USM have compact size, high force density, and simple mechanical structure, slow speed without additional gear or spindle, high torque, non-magnetic operation, freedom for constructional design, very low inertia, fast dynamic time responses, direct drive, fine position resolution, miniaturization and noiseless operation. These criteria gave them the potential to be used in a number of industrial applications [9][10][11][12][13][14][15][16][17]. Demanding and careful examination for these applications reveals that there are apparent teething issues.…”

Section: Introductionmentioning

confidence: 99%

“…While a piezo-ceramic element, typically PZT, expands in direct proportion to the magnitude of the applied voltage, the USM on the other hand accumulates those displacements over time. Therefore the transfer function of the motor, relating to the magnitude of the driving signal to the displacement is an integrator [14,[17][18] and this shows a delay in the dynamic response of the USM, but it is not nearly significant as that in an electromagnetic servomotor. The second issues, is that because motion is generated through a friction force therefore it has a dead band.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Computer Simulation and Modelling of 3D Travelling Wave Ultrasonic Motor Using a Flexural Vibration Ring Transducer

Shafik

Nyathi

Fekkai

2013

AMM

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This paper presents a 3D piezoelectric ultrasonic motor using a single Flexural Vibration Ring Transducer. The motor consists of three main parts, the rotor, the stator and the housing unit. The stator is a piezoelectric transducer ring made from PZT S42 material. Three steel rods and a magnet were designed to support the rotor. The rotor is a sphere of metal that rests on the stator intersecting at the tips of the steel rods and the magnet. The housing unit is made of Perspex, a transparent thermoplastic material. Longitudinal and bending vibration modes, of oscillating structures are superimposed in the motor, generating elliptical micro motions at the driving tips. Pressing the rotor against the stator tips the micro motions are converted into a 3D rotational motion, via the friction between the tips of the three rods and the rotor. The motor structures, working principles, design and finite element analysis are discussed in this paper. A prototype of the motor was fabricated and its characteristics measured. Experimental tests show typical speed of movement equal to 35 revolutions per minute, a resolution of less than 5μm and maximum load of 3.5 Newton.

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Section: Proposed 3d Usm Design and Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Computer Simulation and Modelling of 3D Travelling Wave Ultrasonic Motor Using a Flexural Vibration Ring Transducer

Shafik

Nyathi

Fekkai

2013

AMM

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“…Therefore, the reciprocating (or rotational) motion of ultrasonic motor is accompanied by various nonlinear effects. Moreover, a dead band caused by the difference between the two kinds of friction limits the ability of the ultrasonic motor to accelerate quickly and to position accurately.…”

Section: Introductionmentioning

confidence: 99%

Micro‐Driving behavior of carbon‐fiber‐reinforced epoxy resin for standing‐wave ultrasonic motor

Zhang

2015

Polymer Composites

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The application of the friction drive of carbon-fiberreinforced composites to a standing-wave ultrasonic motor was investigated. Friction drive tests were conducted on carbon-fiber-reinforced epoxy resins (CF/ epoxy) by home-made test rig, which was based on plate-rod vibrator. The effects of fiber orientation and ply thickness on dynamic drive and dynamic normal forces were investigated. Fiber orientation angle and ply thickness affected friction drive. Different dynamic drive forces, which varied both in amplitude and period, were observed for CF/epoxy composites with different winding angles. A CF/epoxy composite with a winding angle of 30 showed the largest dynamic drive force (~0.45 N) and the shortest contact period (~26 ls). The period of dynamic normal force was uniform (~65 ls) for various CF/epoxy composites. Wear traces of different composites exhibited different wear modes, such as scuffing, peeling, and shearing. The anisotropic property of CF/epoxy material affected the drive process of standing-wave ultrasonic motor. The current study taking the carbon-fiber-reinforced epoxy resin as an example of anisotropic materials arise more enough attention on inexpensive, biodegradable, and renewable alternatives for the efficient and durative drive of a standing-wave ultrasonic motor. POLYM. COMPOS.,

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“…They have compact size, high force density, simple mechanical structure, slow speed without additional gear or spindle, high torque, nonmagnetic operation, freedom for constructional design, very low inertia, fast dynamic time responses, direct drive, fine position resolution, miniaturization and noiseless operation. These criteria gave them the potential to be used in a number of industrial applications [9][10][11][12][13][14][15][16]. Demanding and careful examination for these applications reveals that there are apparent teething issues.…”

Section: Introductionmentioning

confidence: 99%

A Standing Wave Piezoelectric Ultrasonic Motor Using a Single Flexural Vibration Ring Transducer

Shafik

Makombe

2013

AMM

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This paper presents a rotary standing wave ultrasonic motor using single flexural vibration ring transducer. The motor consists of three main components, the stator, rotor and housing unit. The stator is a piezoelectric transducer ring. The rotor is designed of a compact driving wheel and shaft. The housing unit is made of a transparent thermoplastic Perspex material and is part of the motor working mechanism. The motor design, structure, working principles and modelling using finite element analysis is discussed and presented in this paper. A prototype of the motor was fabricated and its characteristics measured. Experimental tests showed that the motor electrical working parameters are: Current: 100 m-amps, Voltage: 100 volts, Frequency: 41.7 kHz, typical speed of 32 revolutions per minute, a resolution of less than 50μm and maximum load of 1.5 Newton.

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A linear piezo-electric ultrasonic motor using a single flexural vibrating bar for electro-discharge system industrial applications

Cited by 9 publications

References 19 publications

Computer Simulation and Modelling of 3D Travelling Wave Ultrasonic Motor Using a Flexural Vibration Ring Transducer

Computer Simulation and Modelling of 3D Travelling Wave Ultrasonic Motor Using a Flexural Vibration Ring Transducer

Micro‐Driving behavior of carbon‐fiber‐reinforced epoxy resin for standing‐wave ultrasonic motor

A Standing Wave Piezoelectric Ultrasonic Motor Using a Single Flexural Vibration Ring Transducer

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