To be precise, it pushes and pulls a mass wherever it is along a line. In this paper we present a voice coil actuator as an alternative to a pztbased optical delay. This provides a general view of an hdd voice coil actuator. Us5838515a pwmlinear driver for disk drive voice coil. The companies featured in the following listing offer a comprehensive range of actuators. Users may download and print one copy of any publication from the public portal for the purpose of private. The voice coil actuator motor vcm driver circuit set forth in claim 1 wherein the motor driver input comprises a digital decoder connected to receive, hold and convert a digital current command value into a raw motor control signal, and a filter for filtering the raw motor control signal to. Precision laser scanning can design custom motion control electronics and software for your voice coil actuator requirements. 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. Thus, electromagnetic damping can be used as viscous damping. Voice coil actuators are light in weight, inexpensive and offer other advantages such as zero hysteresis, low operational voltage and a long life. A device for focusing a laser in which a voice coil and lvdt are mounted in parallel alignment with each other and have a common centrally disposed armature. The am 5030 enables automation of your manual am 503 or.
Voice coil based robust and miniature optical delay for. Linear dc motors, voice coil motors vcm or voice coil actuators vca are the simplest type of electric. Voice coil actuators vcas are applied in a fast steering mirror fsm, precision positioning platform, etc. Force generated by lorentz law does not vary linearly with the position of operating region about a constant current input. It was specifically developed for applications requiring both high precision and highspeed positioning over a short to medium stroke. Linear motion industrial actuators motion solutions. It is sometimes said that voice coils are intended for fast. Actuators free fulltext effect of electromagnetic damping on.
Voice coil actuators in quantities of 100 to 200 are available in 4 weeks and oem original equipment manufacturers quantities can be available in 6 to 8 weeks from receipt of order. The novel actuator incorporates planar magnets in a modified halbach array configuration to ensure compactness and an exceptionally intense, uniform magnetic field. Pdf voice coil actuators for two mtg instruments researchgate. Jul 07, 2017 this 3axis voice coil actuator stage has 2 inch travel on the x and y axes and 0. Voice coil motor vcm, also called voice coil actuators vca, is an electric motor consists of a magnet and yoke in conjunction with a coil. Its compact size allows it to fit into small spaces.
A voice coil motor can be used as a simple two position actuator. Motran industries is proud to announce a new product line. The voice coil allows for a faster response and thus shorter equipment use time when performing a procedure. When current flows through the coil, it moves in the magnetic field of the permanent magnet. High force density linear permanent magnet motors core.
The engineering and sales staff at motion solutions has decades of experience in matching technology with applications. One pair of coils is circular, and the other is rectangular. Mar 27, 2020 h2w technologies have been manufacturing voice coils that have been custom designed for the medical industry. Comparative finite element analysis of a voice coil actuator and a. There are a number of people offering onweb examples of hdd voice coil drivers used for other purposes. The mechatronic design is described in terms of the stages most prominent features regarding mechanical design, assembly, actuator configuration, and power supply. Two concepts are chosen, a very stiff actuator consisting of a spindle drive and piezo modules and a soft actuator with spindle drive and springvoice coil. The name voice coil comes from one of its historically first applications.
A high performance voice coil actuator for optomechatronic. These applications demand that the vcas used are simple, inexpensive, reliable, and efficient. Design and optimization of a new type of spherical voice coil actuator. This moving coil actuator ncc03 070011v comes supplied with an aluminum bobbin which allows for heat to be conducted away from the motor windings. The mgv is a compact series of voice coil stages by akribis systems that features cross roller bearings and an encoder resolution of up to 20nm. Whats the difference between voice coil actuators and. Voice coil actuators are typically used in focusing applications, oscillatory systems, mirror tilting, and miniature position control. Smac is a leading manufacturer of precision programmable electric actuators based on moving coil technology.
Thus a voice coil does not primarily move the mass, motion is a. Smac moving coil actuators electric actuators voice. The system is fully selfcontained including a one axis stage, voice coil actuator, feedback device, servo amplifier and servo controller. Customers desiring to increase uptime, ease of set up, and adjustment can make dramatic improvements by using mechatronic smac moving coil technology. 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. Voice coil motors vcm voice coil actuators stanford magnets. Linear actuator linear voice coil actuators provide precision, linear motion over short distances. A voice coil is a linear actuator, that moves a mass along a line. The minimum air gap clearance between these assemblies is 0. Linear voice coil motors actuators and micro voice coil actuators. Voice coil actuators are available as a set consisting of the magnet and coil assemblies. Voice coil actuators utilize magnetic spring technology.
It provides the motive force to the cone by the reaction of a magnetic field to the current passing through it. Additionally, we offer custom designed solutions to meet your application specifications. Voice coil motors are short stroke actuators that use a permanent magnet field and a. Integrated linear encoder for reliable position control and repeatable accuracy. H2w has built its smallest moving magnet voice coil actuator ncm01040012ib to date, with an outside diameter of 0. The coil and magnet are concentric about a common axis and there exists an engineered magnetic return path. Linear dc motors, voice coil motors vcm or voice coil actuators vca are the simplest type of electric motors.
Linear voice coil motors actuators and micro voice coil. Designed to save users time in determining the most suitable linear actuator, the companys online vca calculation tool calculates the optimum linear voice coil actuator size for a given. To solve this issue, a novel voice coil actuator was created, which reconfigures the standard cylindrical design with one of a rectangular structure. Plus the company offers custom designed solutions to meet application specifications. Control actuator controls protection open and shortcircuit detection on vcm pins 3 description undervoltage lockout uvlo the drv201 device is an advanced voice coil motor thermal shutdown driver for camera auto focus. Smac electric actuators are designed to perform at exceptionally high speeds or very low speeds and with submicron accuracy and repeatability.
The magnets position, the type of magnet, the surrounding structure, etc. Drv2510q1 3a automotive haptic driver for solenoids and. Linear voice coil actuators incorporate 2 spring designs, based on magnetic technology, that ensure constant and precise valve position in either open or closed setting when electrical power is off. Hollow core linear voice coil motors direct drive linear motors linear voice coil motor actuator lvcm02, continuous force. A voice coil consisting of a former, collar, and winding is the coil of wire attached to the apex of a loudspeaker cone. The force generated is fairly constant throughout the stroke length, with a small dropoff, typically less than 5 percent, at the ends of stroke. Our actuators are unique in that force, position, and speed are totally programmable. A voicecoil motor is designed and optimized as the active control actuator to provide proper feedback force to reduce the amplitude of the vibration, and is fixed in the wholespacecraft. But a voice coil doesnt primarily move things, it is a consequence of the force it applies. Voice coil drives consist of 2 essential components. Considering the above tradeoffs, a voice coil actuator was selected for the linear motor. It would be built with inexpensive, commercially available components magnet, voice coil, suspension from the loudspeaker industry. Rotary voice coil actuators are supplied unhoused without bearings.
Voice coils are silent, have only one moving part, are naturally smooth and linear, are very robust, have reasonable force and power densities, and are relatively inexpensive. Design and control of a voice coil actuated robot arm for. Moreover, pztbased actuators require a relatively high operational voltage and are expensive. Often called a linear motor or voicespeaker coil, the electromagnetic actuator is versatile and relatively easy to designbuild. This actuator has been manufactured using lowoutgassing materials as selected by nasa in order to make this actuator vacuum compatible. Linear voice coil actuator calculation tool is easy to use. Here, we develop a linear elastic actuator in parallel leap, which places a voice coil actuator in parallel with a spring fig. Haptic linear resonant actuators voice coil actuators by. Welcome to the premier industrial source for actuators.
A design schematic and a prototype of two voice coil actuators of different sizes are shown to the right. You can download the source code and and additional information of this vcm on. Us9395511b1 voice coil actuator with integrated lvdt. Altogether, voice coil motors are the ideal roatry or linear servo actuator for applications requiring short stroke. It has an integrated da converter for setting the vcm current. Download pdf copy download brochure pi has introduced a new linear actuator, which makes use of a voice coil linear motor to provide rapid and highprecision motion. Aug 25, 2016 voice coil actuators with moving magnet and moving coil from h2w technologies voice coils are suitable for fixedstroke applications, with typical maximum strokes of 5 to 6 inches. The problem with a stepping motor with position feedback is that is operates too slowly for most applications. When it comes to linear motion, engineers often come down to two choices. Choosing the most appropriate actuator for your application starts with considering factors like speed, force, length of travel, duty cycle, environmental conditions, load, footprint, and budget. Reversing the polarity of the applied voltage will move. This makes smac electric actuators ideal for a wide range of high cycle positioning, measuring, inspection, and pick and place applications, particularly where 100% verification is required.
Design of a new type of spherical voice coil actuator. Mechanical engineering massachusetts institute of technology, 2001. Pimag voice coil magnetic drive, high velocity and high dynamics. A linear voice coil actuator is ideal for short stroke typically less than 2 inches closed loop servo applications. Minimization of modeling error of the linear motion system. Akribis voice coil motors are one of the simplest actuators available and consist of two components. They are used in many types of control applications, from drive mechanisms in computers to robotic assembly lines. Voice coil, the periodical for the loudspeaker industry is free for those who qualify. The vcs2020 voice coil linear stage is a high performance compact positioning system. A permanent magnet and a coil that is located in the air gap of the magnetic field. Voice coil actuator 200 comprises coilsupporting arm 203 a and coilsupporting arm 203 b also sometimes referred to as yokes, which support a wire coil 202. Pdf vibration isolation and suppression system for.
A voice coil actuated air valve for use in compressor. Applicants invention replaces a stepping motor with a voice coil actuator with integrated position sensing. Voice coil actuators and motors ncc voice coil linear actuator ncc02070011r supplier. This study theoretically and experimentally investigates the electromagnetic damping characteristics of a bobbinwounded coil with an attached cantilever beam floating. Mar 05, 2017 this actuator is an open source vcm actuator.
Drv201 voice coil motor driver for camera auto focus. A lens is mounted at one end of the armature and a laser is located at the opposite end. You can download the latest version at the adobe website. Highpowered voice coil actuator for fast steering mirror. Sep, 2016 the force generated by a voice coil motor or actuator is relatively constant throughout the stroke of the actuator, with minor dips at the beginning and end of the travel length. Pdf voice coil actuators for percussion robotics researchgate. However, the use of industrial strength voice coil actuators provides a compelling alternative given a desirable set of. They are currently used for a wide range of applications, including moving much larger masses. Haptic lras utilize haptic technology or kinesthetic communication to recreate the sense of touch, by applying vibrations or forces to the user of the device. The laser beam passes through the central bore and is focused by the voice coil moving the armature. The lvdt core is incorporated into the shaft connecting the bellows and the voice coil. 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 for inclusion in the monthly test bench column. Due to the direct coupling of the load directly to the motor it is suitable for high seed and high acceleration applications. Design of a hopping mechanism using a voice coil actuator.
This paper describes the design and performance testing of a vibration isolation and suppression system viss which can be used to isolate a precision payload from. 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. Voice coil actuators and motors specifications engineering360. H2w technologies offers miniature versions of both our moving coil and moving magnet voice coil actuators. H2w technologies offers miniature versions of both moving coil and moving magnet voice coil actuators. They are currently used for a wide range of applications. Singlephase lorentzforce actuator is also known as a voicecoil actuator and a threephase lorentzforce actuator can be seen as a linear motor. A voice coil actuator, also known as a noncommutated dc linear actuator, is a type of direct drive linear motor. Design and control of a voice coil actuated robot arm for humanrobot interaction by john m. It has very low electrical and mechanical time constants.
We choose a parallel conguration to ofoad the force requirements of the mechanism to the spring, and allow the voice coil to inject energy directly into the spring. Voice coil actuators precise control of zaxis and fsms. Coupling the rotary voice coil actuator to your bearing system and a rotary encoder or other feedback device yields a system that is capable of intricate angular position, velocity, and acceleration control. H2w technologies offers voice coil actuators for ventilators. Mechatronic design, actuator optimization, and control of. Pdf while cedrat technologies has been active in space for more than 20. In order to read a pdf file, you must have adobe acrobat reader installed on your computer. However, these values depend strongly on the position of the mover, causing a high nonlinear stiffness. Smac moving coil actuators electric actuators voice coil. Select axial segment actuators as per your requirement. Motran industries manufactures high performance axial segment actuators use in different industry. The direction of movement is determined by the direction of current flow in the the single phase linear voice coil actuator allows direct, cog. A voice coil motor is designed and optimized as the active control actuator to provide proper feedback force to reduce the amplitude of the vibration, and is fixed in the wholespacecraft. Voice coil actuators precise control of zaxis and fsms these fast, high accuracy, linear voice coil actuators with integrated feedback are useful tools in laser scanning.
Applying a voltage across the terminals of the motor causes the motor to move to one direction. Rotary actuator rotary voice coil actuators or motors provide precision, circular motion over short angles. Changing a timevarying magnetic field induces an electromotive force emf in nonmagnetic conductive materials, resulting in an eddy current across the conductor. To be precise, it pushes or pulls on the mass, the mass then moves as a result of this force. As snoopen says you want a voice coil driver or actuator. Two concepts are chosen, a very stiff actuator consisting of a spindle drive and piezo modules and a soft actuator with spindle drive and spring voice coil. Applications in the semiconductor and electronics industries are known for requiring extremely high throughput and micron or nanometerlevel resolution. Both are simple electromechanical devices that can accomplish the task. Both designs achieve similar resolution but with different passive stiffness.
Voice coil actuators with moving magnet and moving coil from h2w technologies voice coils are suitable for fixedstroke applications, with typical maximum strokes of 5 to 6 inches. In this paper, mechatronic design, actuator optimization and controls of a longstroke 20 mm linear nanopositioner are presented. A voice coil is a kind of linear actuator, it moves a given mass along a line. A large tilt angle, a high tilt torque, and a uniform and decoupled torque constant by each coil with a compact diameter of 100 mm. Its well within the capabilities of an arduino to drive one of these. In this paper, we report a novel vca with concentration fluxline structure.
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