PiezoElectric Ultrasonic Motors
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• It has been known for more than 30 years.
• The first ultrasonic motor was introduce by v.v lavrinko in 1965.
• An Ultrasonic motor is a type of electric motor formed from the ultrasonic vibration of a component, the stator being placed against another, the rotor depending on the scheme of operation. • Conversion of electric energy into motion by inverse piezoelectric effect.
• To obtain the levels of torque speed characteristics of USM using conventional motors we require to add a gear system to reduce the speed. • These characteristics of USM makes them attractive for robotic applications where small motions are required.
• This motor achieves high speed and drive forces, while still permitting the moving part to be positioned with high accuracy.
The piezoelectric effect is understood as the linear electromechanical interaction between the mechanical and the electrical state in crystalline materials with no inversion symmetry. • Piezoelectricity – generation of voltage in response of mechanical stress.
• The word is derived from the Greek piezein, which means to squeeze or press.
• This effect is also reversible.
• Deformation is only 0.1 % of the original dimension.
• Piezoelectric material- quartz(SiO2), barium titanate (BaTiO3) lead zirconate titanate and occasionally lithium niobate .
Electromagnetic motors are notorious for consuming high amount of power and creating high ambient motor temperatures respect to USM
The electromagnetic motors produce strong magnetic fields which cause interference. Ultrasonic motors use piezoelectric effect and hence no magnetic interference.
Electromagnetic motor has high input to output energy loss ratios USM High positional accuracy respect to Electromagnetic Motor.
• Generation of gross mechanical motion through the amplification and repetition of micro-deformations of active material.
• The active material induces an orbital motion of the stator at
• It has been known for more than 30 years.
• The first ultrasonic motor was introduce by v.v lavrinko in 1965.
• An Ultrasonic motor is a type of electric motor formed from the ultrasonic vibration of a component, the stator being placed against another, the rotor depending on the scheme of operation. • Conversion of electric energy into motion by inverse piezoelectric effect.
• To obtain the levels of torque speed characteristics of USM using conventional motors we require to add a gear system to reduce the speed. • These characteristics of USM makes them attractive for robotic applications where small motions are required.
• This motor achieves high speed and drive forces, while still permitting the moving part to be positioned with high accuracy.
The piezoelectric effect is understood as the linear electromechanical interaction between the mechanical and the electrical state in crystalline materials with no inversion symmetry. • Piezoelectricity – generation of voltage in response of mechanical stress.
• The word is derived from the Greek piezein, which means to squeeze or press.
• This effect is also reversible.
• Deformation is only 0.1 % of the original dimension.
• Piezoelectric material- quartz(SiO2), barium titanate (BaTiO3) lead zirconate titanate and occasionally lithium niobate .
Electromagnetic motors are notorious for consuming high amount of power and creating high ambient motor temperatures respect to USM
The electromagnetic motors produce strong magnetic fields which cause interference. Ultrasonic motors use piezoelectric effect and hence no magnetic interference.
Electromagnetic motor has high input to output energy loss ratios USM High positional accuracy respect to Electromagnetic Motor.
• Generation of gross mechanical motion through the amplification and repetition of micro-deformations of active material.
• The active material induces an orbital motion of the stator at