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A novel -type linear ultrasonic motor driven by a single mode.

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A novel linear ultrasonic motor with double driving feet offers high thrust in confined spaces. This design enhances stability and operational life, achieving significant speeds and forces.

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Area of Science:

  • Mechanical Engineering
  • Robotics
  • Materials Science

Background:

  • Linear ultrasonic motors are crucial for applications requiring precise motion in constrained environments.
  • Existing designs often face limitations in thrust generation and spatial efficiency.
  • There is a growing demand for compact, high-performance linear motors in advanced manufacturing and robotics.

Purpose of the Study:

  • To propose and analyze a novel Pi-type linear ultrasonic motor with double driving feet.
  • To optimize the stator design for amplified driving foot amplitude.
  • To introduce a novel, detachable pre-load device to enhance performance and longevity.

Main Methods:

  • Finite element simulation was employed to determine the optimal working mode and structural dimensions.
  • An optimization design process was conducted for the stator to maximize driving foot amplitude.
  • A prototype was fabricated and subjected to performance testing, including speed and thrust measurements.

Main Results:

  • The proposed Pi-type linear ultrasonic motor demonstrated structural stability and high dynamic performance.
  • Experimental results showed no-load speeds of 273 mm/s and 238 mm/s in two directions.
  • The motor achieved maximal thrusts of 80 N and 110 N, respectively.

Conclusions:

  • The novel Pi-type linear ultrasonic motor with a detachable pre-load device meets the demand for high thrust in narrow spaces.
  • The optimized design and pre-load mechanism contribute to improved output, stability, and motor lifespan.
  • The prototype's performance validates the design's effectiveness for demanding applications.