USU ECE 5320 - Piezomotors (Ultrasonic Motors)

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ECE 5320 Mechatronics Assignment#01: Literature Survey on Actuators Topic: Piezomotors (Ultrasonic Motors)OutlineReference listFor further exploration…. (Survival pointers of web references)Basic Working Theory: Piezoelectric PrinciplesClasses of Piezoelectric MaterialsSlide 7Basic Working Theory: Manufacture of Piezoelectric MaterialsMajor applications of Piezoelectric Motors IMajor applications of Piezoelectric Motors IIPiezoelectric Motor OperationTypical ConfigurationOperationExample: Model PDA130 High Speed Piezoelectric Micro-positioning Motor.Slide 15Advantages of the Piezoelectric MotorsDisadvantages of the MotorsCriteria for SelectionCost informationPlaces to purchaseConclusionECE 5320 MechatronicsAssignment#01: Literature Survey on Actuators Assignment#01: Literature Survey on Actuators Topic: Piezomotors (Ultrasonic Motors)Prepared by:Jared B. BowlerDept. of Electrical and Computer Engineering Utah State UniversityEmail:[email protected]; Phone: (435)797-6612; 3/11/200503/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuatorsOutline –Reference list–Links to explore this topic further–Basic working principles illustrated–Major applications–A typical configuration in application –Major specifications–Relevant issues in applications: advantages, disadvantages, how to select, cost information, and places to purchase.–Conclusion03/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuatorsReference list•Mechatronics Handbook 20-57 to 60•1. Kenji Uchino. 1997. Piezoelectric Actuators and Ultrasonic Motors, Kluwer Academic Publishers•http://motion-controls.globalspec.com/LearnMore/Motion_Controls/Piezoelectric_Devices/•http://www.sensorsmag.com/articles/1201/33/main.shtml•http://www.blackstone-ney.com/04.TP_mag_vs_piezo.php•http://www.edn.com/article/CA233737.html03/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuatorsFor further exploration…. (Survival pointers of web references) •http://campus.umr.edu/piezo/•http://www.sensorsmag.com/articles/1201/33/main.shtml•http://www.isso.uh.edu/publications/A2003/dabney.htm•http://www.edoceramic.com/Assemblies_Products/PEMot.htm•http://directory.google.com/Top/Science/Technology/Acoustics,_Ultrasound_and_Vibration/Ultrasound/Ultrasonic_Motors/Basic Working Theory:Piezoelectric Principles•Piezoelectric effect discovered by Pierre and Jacques Curie in 1880•They discovered that under certain conditions such as when quartz is stressed along its main axis, the quartz will generate an electrical field•Now this effect is primarily used in sensing and actuating engineering applications03/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuatorsClasses of Piezoelectric Materials•Natural, such as quartz•Synthetic crystals•Polarized ferroelectric ceramics•Some Polymer films03/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuatorsPiezoelectric Materials fall into 4 main categoriesClasses of Piezoelectric Materials•Most engineering use polarized ferroelectric ceramics•Lead Zirconate Titanate (PZT) is most common•High performance and physical robustness are two main reasons for using the above material in engineering applications03/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuatorsPiezoelectric Materials—EngineeringBasic Working Theory:Manufacture of Piezoelectric Materials03/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuators“High electrical fields are used to polarize ceramic materials. Once domains are properly aligned, the piezoelectric material can do useful work.” “Piezoelectric material constants such as d33 are used to characterize crystal performance for a given applied voltage.” http://www.sensorsmag.com/articles/1201/33/main.shtml03/10/05Major applications of Piezoelectric Motors I•“Micropositioning stages•Manufacturing process control•Fiber-optic positioning•Pick-and-place assembly•Camera autofocus”ECE5320 Mechatronics. Assignment#1 Survey on actuatorshttp://www.sensorsmag.com/articles/1201/33/main.shtml03/10/05Major applications of Piezoelectric Motors II•“Medical catheter placement•Semiconductor test equipment•Computer disk drives•Robotic positioning•Pharmaceuticals handling”ECE5320 Mechatronics. Assignment#1 Survey on actuatorshttp://www.sensorsmag.com/articles/1201/33/main.shtmlPiezoelectric Motor Operation03/10/05“Piezoelectric motors can be classified as standing wave (single vibration driving source) or propagating wave (two standing waves with a 90° phase difference in both time and space)”Kenji Uchino. 1997. Piezoelectric Actuators and Ultrasonic Motors, Kluwer Academic Publishers:269ECE5320 Mechatronics. Assignment#1 Survey on actuatorsTypical Configuration•“The EDO piezoelectric motor is designed for precision micropositioning applications. This low-profile (<0.20 in. high), low-inertia motor uses solid-state piezoelectric crystals for accurate, repeatable motion.The 130 kHz drive frequency provides speeds of 250 mm/s, with a 6 ms response time and a dynamic resolution of <1.0 micron over several inches. The force output to weight ratio is 14:1” (http://www.sensorsmag.com/articles/1201/33/main.shtml)03/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuatorsOperation•“In (A) the motor is at rest with pre-load. When a charge is applied, the element expands across its thickness (B). When the voltage goes negative, the element retracts, leaving a gap (C). The process is repeated 130,000 times/s (D)” (http://www.sensorsmag.com/articles/1201/33/main.shtml)03/10/05ECE5320 Mechatronics. Assignment#1 Survey on actuatorsExample: Model PDA130 High Speed Piezoelectric Micro-positioning Motor.•Motor Speed (unloaded) …………………………200-300 mm/sec.•Motor Speed (100g load) ………………………..100-200 mm/sec.•Driving Force …………………………………….2.5 N Nominal•Operating Frequency …………………………….128 - 132 kHz•Linear Stroke …………………………………….20mm - 140mm•Time Required to Achieve Constant Speed ……...<8 msec.•Time Required to Achieve Complete Stop ………<4 msec.03/10/05Major Specifications IECE5320 Mechatronics. Assignment#1 Survey on actuatorsExample: Model PDA130 High Speed Piezoelectric Micro-positioning Motor.•Dynamic Resolution ……………………………........<1.0 micron•Power Supply ………………………………………...+24V, 250mA•Analog Speed


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USU ECE 5320 - Piezomotors (Ultrasonic Motors)

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