Depending on the operation, an ultrasonic motor is a form of piezoelectric motor that is propelled by the ultrasonic vibration of a stator positioned against a rotor or slide.
Although both normally use some type of piezoelectric material, most frequently lead zirconate titanate and sometimes lithium niobate or other single-crystal materials, ultrasonic motors differ from other piezoelectric motors in a number of ways.
In ultrasonic motors, resonance is used to enhance the vibration of the stator in contact with the rotor, which is the most noticeable difference.
Piezoelectric actuators are constrained by the static strain that may be created in the piezoelectric element, whereas ultrasonic motors also provide arbitrarily long rotation or sliding distances.
Ultrasonic motors are frequently employed in camera lenses to move lens elements as part of the auto-focus mechanism. In this application, ultrasonic motors take the role of the louder and frequently slower micro-motor.
The Global Ultrasonic Motor market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
Unheard by humans, ultrasonic waves with high frequency exceeding 20,000Hz are used by an ultrasonic motor to turn a rotor.
Unlike conventional motors, which rotate a rotor using permanent magnets or coils, ultrasonic motors generate ultrasonic waves utilising piezoelectric components.
Due to the piezoelectric element’s frequent expansion and contraction caused by the electric potential difference between two terminals, ultrasonic waves are produced.
A extremely thin motor or a liner motor can be easily manufactured since ultrasonic motors are physically so flexible. A ring motor that powers interchangeable lenses on a single-lens reflex camera or a mirror-less camera is a recently created product.
The ultrasonic ring motor drives the rotation of the lens, which is used for auto-focus. The operation of a straight-shape ultrasonic motor is briefly described. On the bottom of a long, thin stick, pluralities of piezoelectric elements are pasted at equal distances.
Each additional piezoelectric component is wired to a terminal. The two terminals receive AC voltage supplies with inverted waveform phases.
According to the voltages applied, the piezoelectric components expand and compress, creating an ultrasonic wave inside the stick. Also, the stick’s top surface receives the ultrasonic wave.
The conductivity is affected by a number of factors, including the stick’s thickness and material, the size of the piezoelectric element, the distance between adjacent components, the supply voltage and its frequency, and others. These specifications will be chosen to produce the most.
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