Here h2w technologies helps us to better understand the basics of a voice coil actuator. Bei kimco voice coil actuator on nasa spacecraft to bennu. Demcon, cystic fibrosis, voice coil actuator, sensitivity analysis, design of an actuator. A noncommutated dc linear actuator, typically referred to as a voice coil, is capable of a displacement in excess of 5 inches. Voice coil actuators are electromagnetic devices which produce accurately controllable forces over a limited stroke with a single coil or phase. Build more prototypes faster with vca developers kit. 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. The name voice coil comes from one of its historically first applications. Moving coil actuators do not come with a bearing system, if you would like to see actuators with a builtin bearing system please look at our moving. The frictionfree magnetic direct drive principle allows for most dynamic stages.
V273 pimag voice coil linear actuator physik instrumente uk. This optimized vcm can easily be implemented to control the low frequency vibration typically within the range 0. The voice coil actuator may also be configured as part of a servo system where installation feedback or inputs are used to dictate its motion range. 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. The coil and magnet are concentric about a common axis and there exists an engineered magnetic return path. The coil wrapped around the trapezoidal voice coil is attracted to the magnets within. 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. Voice coils were originally developed for loud speakers for. When current flows through the coil, it moves in the magnetic field of the permanent magnet.
Autoplay when autoplay is enabled, a suggested video will. Pdf voice coil actuators for percussion robotics researchgate. 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. In addition, voice coil actuators, can move bidirectionally, and has a constant force over the stroke and can be used for closed loop position and force applications. They are also often called linear actuators, a name also used for other types of motors. Pdf percussion robots have successfully used a variety of actuator technologies to. Optimal control design of a voice coil head actuator in a. A voice coil is a type of solenoid linear actuator within which an electrical coil and a permanent magnet interact to create high speed, precisely controlled linear motion. This moving coil actuator ncc15 240901x comes supplied with an aluminum bobbin which allows for heat to be conducted away from the motor windings. The pwm is such that it can swing the actuator faster or not.
V275 pimag voice coil linear actuator physik instrumente. Nonpreferred position, hysteresisfree, twowire operation is. It is sometimes said that voice coils are intended for fast. One of the most wellknown uses of a voice coil actuator, however, is the audio loudspeaker. The am 5030 enables automation of your manual am 503 or.
Sep, 2016 either the coil assembly or permanent magnetic field assembly can be used as the moving member in a voice coil actuator. The larger is suitable for a shoulder actuator and the smaller for a hand. 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. Rectangular linear voice coil actuator la1424000a sensata. Sep 01, 2015 in this study, we proposed governing equations for voice coil type linear actuator for valve operation. Its compact size allows it to fit into small spaces. A voice coil is a linear actuator, that moves a mass along a line.
Linear dc motors, voice coil motors vcm or voice coil actuators vca are the simplest type of electric motors. A voice coil actuator, also known as a noncommutated dc linear actuator, is a type of direct drive linear motor. 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. Minimization of modeling error of the linear motion system.
Applications in the semiconductor and electronics industries are known for requiring extremely high throughput and micron or nanometerlevel resolution. Voice coil actuator motion control product hierarchical. A voice coil actuated air valve for use in compressor. Pi does not only develop and produce a broad range of positioning stages. Jul 07, 2017 voice coil actuators consist of two main parts. A novel 4 by 4 array of electromagnetic micro actuators operating on the principle of voice coil actuators is presented. Conventional electromagnetic linear actuators more simply referred to as solenoids include the following primary components. However, the use of industrial strength voice coil actuators provides a. Aug 25, 2016 the term voice coil comes from one of the first applications. Rotary voice coil actuators are supplied unhoused without bearings. Pi is a worldwide leading supplier of solutions in the fields of motion and positioning.
Through calibrated noninvasive acquisition and analysis of the 40 percussive rudiments, a typical range of motion with respect to striking implement tip motion. Development of wearable microactuator array for 3d. We draw up governing equations which are composed by combination of electromagnetic theories and empirical knowledge, and deduct the values of major design factors by use of them. Control of reluctance actuators for highprecision positioning.
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 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. A reluctance model of the voice coil actuator structure will allow one to compute the soft iron losses, the permanent magnet field and the winding field values in order to compute actuator performance. 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. To be precise, it pushes and pulls a mass wherever it is along a line. May 14, 2020 the voice coil actuator may also be configured as part of a servo system where installation feedback or inputs are used to dictate its motion range. Voice coils are a configuration of linear lorentzforce actuator lla that. They are generally larger in diameter and shorter in length. A very common application for voice coil actuators is the read and write head on a computer hard drive. High force density linear permanent magnet motors core. High speed voice coil linear actuator, force and position control, linear encoder. The low moving mass allows for high accelerations of light payloads.
Haptic linear resonant actuators voice coil actuators by. May 21, 2011 flexure linear actuator with voice coil. Linear voice coil motors linear dc motors, voice coil motors vcm or voice coil actuators vca are the simplest type of electric motors. We suggested the governing equations to determine the values of design parameters of linear actuator as. Oct 28, 2015 a noncommutated dc linear actuator, typically referred to as a voice coil, is capable of a displacement in excess of 5 inches. Akribis voice coil motors are one of the simplest actuators available and consist of two components. Publishers pdf, also known as version of record includes final page, issue and. Voice coil drives consist of 2 essential components. Singlephase lorentzforce actuator is also known as a voicecoil actuator and a threephase lorentzforce actuator can be seen as a linear motor. Select axial segment actuators as per your requirement.
Motran industries is proud to announce a new product line. This faq looks at another type of motor, generally known as the voice coil actuator vca and more formally as noncommutated dc linear actuator. 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. This force causes the moving part which can be either the magnet or the coil to travel. 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. Like linear motors, they work on the principle of a permanent magnet field and a coil winding. Applying a voltage across the terminals of the motor causes the motor to move to one direction. The term voice coil is derived from the fact that this type of electromagnetic device is used in audio speaker technology to rapidly move the cone of the speaker backand. Trapezoidal voice coil, 3 actuator axis, 4 arm, 5 disk head, 6 drive motor, and 7 discs or platters. Mar 01, 2008 voice coil head actuator and 3phase stepper spindle motor in a computer harddrive.
It has very low electrical and mechanical time constants. Bei kimco la2422002z linear voice coil actuator 4 ohms split moving magnet vca. Moving coil actuators do not come with a bearing system, if you would like to see actuators with a builtin bearing system please look at our moving magnet models. Design of voice coil type linear actuator for hydraulic servo. This 3axis voice coil actuator stage has 2 inch travel on the x and y axes and 0. Due to the direct coupling of the load directly to the motor it is suitable for high seed and high acceleration applications. The simulation method will yield exact results which may not be much improvement over the piecewise integration method. But a voice coil doesnt primarily move things, it is a consequence of the force it applies. An easy way to minimize the actuator moving mass while providing the valve throttling was to use the voice coil as the moving sleeve of a sleeve valve. Voice coil linear actuators acceleration travel 2 inches 50 mm 20 gs peak force 300 lbs 33 n continuous force 100 lbs 444 n resolution. Through calibrated noninvasive acquisition and analysis of.
The intended application of the array is dynamic tactile stimulation, where multiple actuators generate an illusion of touching a moving pattern. Promation engineering achieves milestone in high temperature applications. In this study, we proposed governing equations for voice coil type linear actuator for valve operation. Higher forces can be achieved by increasing the diameter. Voice coil actuators are a type of direct drive mechanism that provides extremely precise positioning over small displacements. A voice coil actuator can deliver a force according to the lorentz force. Model based design of an expiratory valve and voicecoil actuator.
In comparison to earlier designs, the device has smaller dimensions of 2. Dynamic modeling and control of voicecoil actuators for. A permanent magnet and a coil that is located in the air gap of the magnetic field. They are currently used for a wide range of applications, including moving much larger masses. The direction of movement is determined by the direction of current flow in the the single phase linear voice coil actuator allows direct, cog. This linear and sometimes rotary motor is an effective solution for many applications and can be driven. Voice coil actuator h2w technologies trinamic motion control moticont alio industries, inc. Both designs achieve similar resolution but with different passive stiffness. V277 pimag highload linear actuator physik instrumente. The voice coil actuator would be the spool for modulating the valve orifice area.
Linear voice coil motors actuators and micro voice coil. A linear voice coil actuator is ideal for short stroke typically less than 2 inches closed loop servo applications. Motran industries manufactures high performance axial segment actuators use in different industry. A voice coil actuated air valve for use in compressor forced. Optimization and redesign of actuators for a medical devicee.
The la2420000a voice coil actuator featuring an interleaved magnetic circuit design is a directdrive, forcegenerating servo device measuring 2. In recent years, the most common application for voice coils has been to move the heads inside computer disk drives, but theyre also widely found in medical devices, mirror controls, and oscillating systems. Reversing the polarity of the applied voltage will move. The design is particularly easy to align and assemble. Thus a voice coil does not primarily move the mass, motion is a. The actuator features peak and continuous force output of 25 and 10 lb. Cylindrical frameless linear voice coil actuator la0810. Electromechanical voice coil solenoids and actuators. Thus a voice coil does not primarily move the mass, motion is a consequence of the force the voice coil applies to it.
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 linear actuator ncc15240901x this moving coil actuator ncc15 240901x comes supplied with an aluminum bobbin which allows for heat to be conducted away from the motor windings. To be precise, it pushes or pulls on the mass, the mass then moves as a result of this force. A voice coil actuator controls the movement of the readwrite head following the principle of electromagnetic attraction and repulsion. Result of the optimization was verified using fem simulation. Design of voice coil type linear actuator for hydraulic. In producing a prototype of the stage, precision engineering and design optimization principles were applied. The square wave is a consequence of controlling voltage in arduino. Force generated by lorentz law does not vary linearly with the position of operating region about a constant current input. When current is applied to the coil, a force is generated in direct proportion to the amount of current. Rectangular linear voice coil actuator la0530001z sensata. We can now combine these nondimensionalized constraints with the force density.1461 1486 1024 1241 1583 528 75 1352 31 1170 1428 821 581 1609 1284 1124 286 1074 546 967 391 1619 648 181 1168 941 29 400 452 85