It is sometimes said that voice coils are intended for fast. Voice coil actuators are a type of direct drive mechanism that provides extremely precise positioning over small displacements. Lowmass shortstroke voicecoil actuator for integrated disk. To be precise, it pushes and pulls a mass wherever it is along a line. Cylindrical models are typically used in long stroke applications, whereas arcsegmented designs are better suited for short. Its compact size allows it to fit into small spaces. Additionally, we offer custom designed solutions to meet your application specifications. When it comes to linear motion, engineers often come down to two choices.
Voice coil actuator products inertial force actuators voice coil actuator products. The direction of movement is determined by the direction of current flow in the the single phase linear voice coil actuator allows direct, cog. The larger is suitable for a shoulder actuator and the smaller for a hand. A voice coil actuated air valve for use in compressor forced. Test bench is an open forum for oem driver manufacturers in the loudspeaker industry and all oems are invited to submit samples to voice coil. The kit allows users to take advantage of the inherent benefits. Whats the difference between voice coil actuators and. A novel 4 by 4 array of electromagnetic micro actuators operating on the principle of voice coil actuators is presented. A voice coil is a linear actuator, that moves a mass along a line. The essential principle is the same as you will find in any permanent magnet loudspeaker. Like linear motors, they work on the principle of a permanent magnet field and a coil winding.
Modeling and design of a voice coil motor for auto. This product mates the voice coil motor to a very smooth crossroller bearing stage and a very high resolution position feedback sensor. You can download the source code and and additional information of this vcm on. Design of a hopping mechanism using a voice coil actuator.
But a voice coil doesnt primarily move things, it is a consequence of the force it applies. Select axial segment actuators as per your requirement. Precision laser scanning can design custom motion control electronics and software for your voice coil actuator requirements. Introduction compression systems for jet engines have long been vexed by a region of flow uncertainty as shown on a typical compressor map in figure 1. The moving coil actuators, ncc type sometimes referred to as voice coils are typically supplied without bearings or a shaft, but can be added if desired. The lvdt core is incorporated into the shaft connecting the bellows and the voice coil. V273 pimag voice coil linear actuator physik instrumente. This linear and sometimes rotary motor is an effective solution for many applications and can be driven and controlled with fairly good precision and repeatability. Lfa2010 linear foucs actuator interface drawings presents the mechanical details necessary for integration of the product. Linear motors voice coils voice coils motion control. This force causes the moving part which can be either the magnet or the coil to travel.
Moving coil actuators rotary servo motor assembly rotary home index connector vacuum connection optional vacuum tubing optional flex cable. To minimize the amplitude of longitudinal resonance vibration in the actuator upon energization of the coil, the coil is secured to the outer of two concentric overlapping members and the carriage is secured to the inner member. Design and optimization of voice coil motor for application. When current flows through the coil, it moves in the magnetic field of the permanent magnet. Voice coil impedance as a function of frequency and. Our actuators are unique in that force, position, and speed are totally programmable. The voice coil motor is selected as driving motor in scanning mechanism, then the size of alnico and winding of motor is given, and the voice coil motor is designed. Unfollow voice coil actuator to stop getting updates on your ebay feed.
Model ifx200100 ifx200120 ifx400100 ifx400101 ifx410100. Jul 07, 2017 voice coil actuators consist of two main parts. The application is novel to linear voice coil actuators, which are usually adopted in pc hard. Development of a novel pcbbased voice coil actuator for. Jun 18, 2018 this faq looks at another type of motor, generally known as the voice coil actuator vca and more formally as noncommutated dc linear actuator.
Oem linear actuator pimag voice coil magnetic drive, high velocity and high dynamics. A voice coil actuator, also known as a noncommutated dc linear actuator, is a type of direct drive linear motor. Linear dc motors, voice coil motors vcm or voice coil actuators vca are the simplest type of electric motors. In this paper, we propose optimized design of a voice coil motor vcm that can be used as an actuator to implement a suitable controller for active isolation using feedback control to attenuate the low frequency vibration of all six rigid body modes. At the heart of all smac actuators is the moving coil, also described as a voice coil actuator. Us9395511b1 voice coil actuator with integrated lvdt. Linear elastic actuator in parallel leap zachary batts, joohyung kim, and katsu yamane abstract among legged robots, hopping and running robots are useful because they can traverse terrain at high speeds and are a benchmark platform for locomotion actuators. A latch for the pivoting head arm of a datastorage magnetic disc machine, in which a ushaped latching member is arranged to avoid malfunctioning to block the movement of the arm, and may be operated entirely by means of a toggle spring, or entirely by means of a. Voice coil motors vcm, also called voice coil actuators vca, are a very mature design that utilizes a magnet and yoke in conjunction with a coil.
H2w technologies is a manufacturer of linear motors and positioning stages, which include. A linear voice coil actuator is ideal for short stroke typically less than 2 inches closed loop servo applications. Moticont provides designs and manufactures linear motors, positioning stages, and fully integrated singlemultiaxis positioning systems including voice coil linear actuators, linear stepper motor, linear induction motor and many more. An actuator for a disk file comprises a carriagearm assembly secured to a coil and movable longitudinally upon energization of said coil.
A data processor is continuously updated with the current position and relative radial velocity of the disk drive head actuator arm assembly. When current is applied to the coil, a force is generated in direct proportion to the amount of current. A voice coil motor vcm control circuit controls operation of a vcm which positions a disk drive head actuator arm assembly. Us4654735a latch for head positioning actuator for disc. Aug 25, 2016 even without a feedback device, a voice coil actuator has good force control due to the fact that the force generated is directly proportional to the applied current. Voice coil stage interfacing and user manual deatils installation, operation and maintenance of the product. As a single piece, the linear actuator can be mounted on one side and does not require a customer supplied alignment system, making it easy. Linear voice coil motors actuators and micro voice coil.
The design is particularly easy to align and assemble. Force generated by lorentz law does not vary linearly with the position of operating region about a constant current input. Thus a voice coil does not primarily move the mass, motion is the consequence of the force it applies to it. Us5384524a voice coil motor control circuit and method for. Motran industries manufactures high performance axial segment actuators use in different industry. The low moving mass allows for high accelerations of light payloads. The vcs1010 voice coil linear stage is a high performance compact positioning actuator. There is a core tube or moving armature that passes through. Mar 05, 2017 this actuator is an open source vcm actuator. Advanced power electronics center department of electrical and control engineering national chiao tung university, taiwan. The name voice coil comes from one of its historically first applications. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. In response to this demand, a novel, lowinertia voice coil actuator has been developed whereby the traditional moving coil is replaced with a printed circuit board pcb that incorporates the necessary windings as conductive traces on one or more layers of the board. Rotary actuator acdc motors voice coil actuator h2w technologies offers miniature versions of both our moving coil and moving magnet voice coil actuators.
Application of voice coil motors in active dynamic vibration absorbers. Drv2510q1 3a automotive haptic driver for solenoids and. These fast, high accuracy, linear voice coil actuators with integrated feedback are useful tools in laser scanning. Housed voice coil actuators feature all of the inherent advantages of vca technology, such as directdrive, zero. When a current is applied to the coil, a force is generated. Voice coil actuator moticont lvcm025 03801 files 3d. In comparison to earlier designs, the device has smaller dimensions of 2. It typically consists of an arrangement of a permanent magnet and coil, arranged so that currents in the coil generate a pair of equal and opposite forces between the coil and magnet. Us4144466a damping vibrations in voice coil actuator. Direct drive linear motors low cost electric cylinder. Rotary voice coil actuators vca are ideal for high acceleration applications that require angular movement. Minimization of modeling error of the linear motion system. From model and simulation to automotive application. Voice coils draw current when holding a load in a fixed position, or in vertical applications when counteracting the weight of the load.
Development of wearable microactuator array for 3d. Smac is a leading manufacturer of precision programmable electric actuators based on moving coil technology. This moving coil actuator ncc01 040011x comes supplied with a plastic bobbin in order to prevent eddy currents from being generated in the bobbin, and allow for a minimal resistance to the desired motion. The term voice coil has been generalized and refers to any galvanometer like mechanism that uses a solenoid to move an object backandforth within a magnetic field. Our voice coil actuators are available in both standard as well as custom sizes. Electromagnetic actuator driver voice coil solenoid mechanical button replacement automotive haptic applications infotainment centerconsole steering wheel doorpanel seats 3 description the drv2510q1 device is a high current haptic driver specifically designed for inductive loads, such as solenoids and. The stepper motor is known for its precision position. Lfa2010 linear fouc actuator brochure provides a brief presentation of the products features and specifications. The voice coil actuator has a moving magnet armature which contains the magnetic core required for the lvdt. The coil and magnet are concentric about a common axis and there exists an engineered magnetic return path. A voice coil is a kind of linear actuator, it moves a given mass along a line. The bei kimco voice coil actuator line includes linear and rotary motion designs, multiaxis and spherical configurations and a moving magnet design. Design of voice coil motor for scanning of swinging mirror. The voice coil actuator vca developers kit from bei kimco is a completely selfcontained kit including a vca with builtin feedback sensor and a programmable controller with motion control software that runs on the users local pc.
Whats the difference between voice coil actuators and solenoids. Voice coil drives consist of 2 essential components. Pdf application of voice coil motors in active dynamic. A permanent magnet and a coil that is located in the air gap of the magnetic field. In particular, it is commonly used to refer to the coil of wire that moves the readwrite heads in a movinghead disk drive. It has very low electrical and mechanical time constants.
Voice coil, the periodical for the loudspeaker industry is free for those who qualify. Applying a voltage across the terminals of the motor causes the motor to move to one direction. The system is fully selfcontained including a one axis stage, voice coil actuator and highresolution feedback. To couple various line impedances to a voice coil 1% dimensions ohms impedance pri 50015002000 50015002000 50015002000 4550 500 sec. Nov 15, 1977 a lowmass lowinductance shortstroke voicecoil actuator used with a positionable transducer and magnetic disk to provide fast memory access in a low costperbit disk file memory system. It was specifically developed for applications requiring both high precision and highspeed positioning over a short to medium stroke. The moving coil actuators, ncc type sometimes referred to as voice coils are typically supplied. Smac electric actuators are designed to perform at exceptionally high speeds or very low speeds and with submicron accuracy and repeatability. Design of voice coil motor for scanning of swinging mirror rilong liu1. The voice coil actuator is a linear motor which can provide precise force and positioning over a modest distance, and is easy to control.
Pdf format this file type includes high resolution graphics and schematics when applicable. In producing a prototype of the stage, precision engineering and design optimization principles were applied. Voice coil impedance as a function of frequency and displacement mark dodd1, wolfgang klippel2, and jack ocleebrown. Smac moving coil actuators electric actuators voice. Finally, the performance of motor is consistent with the whole system. The voice coil motor is a special form of a direct dive motor with a similar working principle as the electric. Lfa2010 linear fouc actuator brochure provides a brief presentation of the products features and specifications voice coil stage interfacing and user manual deatils installation, operation and maintenance of the product lfa2010 linear foucs actuator interface drawings presents the mechanical details necessary for integration of the product. The intended application of the array is dynamic tactile stimulation, where multiple actuators generate an illusion of touching a moving pattern. To be precise, it pushes or pulls on the mass, the mass then moves as a result of this force. Applicant provides a hole through the center of the voice coil and lvdt to allow a laser beam to pass through the voice coil and lvdt. A moving magnet actuator is a type of electromagnetic linear actuator. Necessary force requirement has also been considered.
Easy integration by coupling the guided load to the moving runner. You can choose from either the moving magnet ncm type or moving coil type ncc type. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Enclosed in a sealed disk module, the actuator and transducing system provide access to any disk information track within one disk revolution or less. Current compressor operating strategies avoid this region of operation by providing a stall. To test and demonstrate the quality of motion that can be achieved using combined position, velocity, and force control with voice coil actuators, we have designed an arm using these technologies.
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