A new ultrasonic motor using electro-rheological fluid and torsional vibration

High-Frequency Excitation for Thermal Imprint of Microstructures Into a Polymer

“…14 Ultrasonic motors are used to drive fluids, 15 to assist cardiac compression devices, 16 and to control electrorheological fluids. 17 As mentioned previously, we will demonstrate that high-frequency vibration generated by a piezoelectric actuator can enhance the thermal imprint process of microstructures into a polymer.…”

“…Surface acoustic waves are used to concentrate bioparticle suspensions, 11 to control the temperature of liquid droplets, 12 to generate solitary pulses and fracture, 13 and to produce regular, long‐range, spatially ordered polymer patterns without requiring the use of physical or chemical templating 14 . Ultrasonic motors are used to drive fluids, 15 to assist cardiac compression devices, 16 and to control electro‐rheological fluids 17 . As mentioned previously, we will demonstrate that high‐frequency vibration generated by a piezoelectric actuator can enhance the thermal imprint process of microstructures into a polymer.…”

Potential ability of ultrasonic motors: A discussion focused on the friction control mechanism

“…Figure 16 shows a prototype motor of 30 mm in diameter operating at 100 Hz. The speed and the torque were 0.12 rps and 1.8 gfcm, respectively [38]. The problem is that the flywheel effect of the rotor is insufficient due to the low operation frequency.…”

Ultrasonic motor performance influenced by lubricant properties

“…A c c e p t e d M a n u s c r i p t efficiency by designing ideal contact and vibration conditions [3,4,5,6,7,8,9,10], by applying the friction materials with desirable tribological performance [11,12], or by optimizing drive and control schemes [13,14,15], these methods are still based on friction drive mechanism and cannot effectively reduce the friction loss without sacrificing output torque. Several types of non-contact USMs, of which the rotor does not contact with the stator, have been developed to eliminate the friction loss [16,17,18,19,20]. However, the output torque of non-contact USMs is greatly lower than that of contact-type USMs, significantly limiting their applications.…”