ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic: Rotary Voice Coil ActuatorOutlineReference listSlide 4To explore further (survival pointers of web references etc.)Slide 6Major applicationsDifference from linear voice coilsBasic working principle illustratedBasic working principle illustrated (continued)A typical sample configuration in applicationApplications: Hard disk drive head actuatorSlide 13Applications: Focused light beam shutters8Applications: Beam steering applications5Major specifications4Design considerations and goalsDesign considerations and goals (continued)Strengths and advantagesLimitationsOther relevant issues in applicationsOther relevant issues in applications (continued)ECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators Assignment#01: Literature Survey on Sensors and Actuators Topic: Rotary Voice Coil ActuatorPrepared by:Karl BurkDept. of Electrical and Computer Engineering Utah State University(435)752-0619 (ECE Dept.)[email protected] 3/10/200601/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-2Outline –Reference list–To probe further–Major applications–Basic working principle illustrated–A typical sample configuration in application (application notes)–Major specifications–Limitations–Other Relevant issues in applications (such as, how to choose, cost information, where to buy etc.)01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-3Reference list1. Voice-Coil Actuators, Designfax, September 1989 (with Joe Stupak). 2. Voice-Coil Actuators: Insight into the Design, PCIM 1989 conference, Long Beach, CA, October 1989 (with Joe Stupak). 3. IMAPS Device Packaging ConferenceMarch 13 - 16, 2005 4. Where do voice-coil actuators fit in?, Joe Campbell BEI Kimco, 8/8/2003, Penton Media5. Electromechanical Actuators, 6th edition, GEEPLUS Europe Ltd01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-4Reference list1. Shorted Turn Effects in Rotary Voice coil Actuators, Michael A. Moser, Quantum Corporation, Milpitas, CA, USA2. Noise Reduction Using Dampening in Voice Coil Motors/Actuators of Hard Disk Drives, Walker C. Blount, Sr. Engineer, copyright International Business Machines Corporation 2001, October 20013. High performance laser shutter using a hard disk drive voice-coil actuator, L. P. Maguire, S. Szilagyi, and R. E. Scholten, Review of Scientific Instruments, Volume 75, Number 9, September 200401/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-5To explore further (survival pointers of web references etc.) •http://yuan.ecom.cmu.edu/rotaryvoicecoil/•http://www.consult-g2.com/course/chapter11/chapter.html•http://www.epanorama.net/circuits/diskstepper.html•http://ieeexplore.ieee.org/iel4/1037/7500/00697558.pdf?arnumber=697558•http://www.beikimco.com/products/rotaryvoicecoil.php•http://www.beikimco.com/products/presentations/actuators.php?n=0101/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-6To explore further (survival pointers of web references etc.) •http://www.beikimco.com/products/beiactuatorsizingprogram.xls•http://www.rohm.com/products/shortform/06camera/camera_index1a.html•http://www.machinedesign.com/ASP/strArticleID/56123/strSite/MDSite/viewSelectedArticle.asp •http://www.geeplus.biz/vcm.pdf •http://www.agere.com/storage/storage_disk_drive.html01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-7Major applications •Hard disk drive head positioning•Integrated circuit manufacturing processes•Digital camera and focused light beam shutter and anti-shock systems•Beam steering applicationsRotary voice coil actuators (also called voice coil motors, moving coil actuator, limited angle torquers, sector torquers, or swing-arm actuators) are useful for several applications including:01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-8Difference from linear voice coils•Rotary voice coils are different from linear voice coils:–Linear voice coils will often have their magnetic field oriented in a straight line along the direction of travel of the moving part although other models are also designed with flat coils.–Linear voice coils are used more for positioning when fast or precise positioning along a straight path is desired and are often used orthogonally in conjunction with other linear voice coils to achieve x-y or even x-y-z positioning.–Rotary voice coils may not be able to boast of linear motion, but they can take advantage of principles of leverage to achieve possibly greater speed or precision.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-9Basic working principle illustrated•If there is an electric current through a coil of wire in a magnetic field, then a translational force is incurred between the magnetic field and the wire in the direction indicated by the right hand rule. •The force will be directly to the amount of current passing through the wire.•This can allow a force in either direction depending on the direction of current flow.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-10Basic working principle illustrated (continued)•Some may have magnetic fields oriented radially and others axially (flat configuration) depending upon the design.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-11A typical sample configuration in application•A hard disk drive head actuator is a common application.•The rotary voice coil is used to position the heads of a disk drive at a precise position for reading and writing of data.•Fine position tuning is accomplished by a closed loop feedback system which often feeds back positioning information read from the disk itself.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-12Applications: Hard disk drive head actuator•Solenoid is used for parking the heads when the drive is not in use since a voice coil has no ‘natural position’ it returns to when not being used.•Appropriate shielding must be used when it is near a magnetic data storage disk.01/13/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-13Applications: Hard disk drive head actuator(Click picture to start video)Entire video clip can be found at:
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