Motion Control Tutorial – Linear Induction Motor: How it Works.

What is all the hype about the Hyperloop? How does it move? What is the technology that makes it possible?

H2W Technologies Linear Induction Motor Tutorial

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Santa Clarita, CA —– Motion Control Tutorial – How Does a Linear Induction Motor Work? – Linear induction motor (LIM) theory is most easily understood as a rotary motor that has been cut and unrolled to generate linear motion, instead of rotary motion. It is comprised of two parts, the primary and secondary, which interact with one another only when power is applied. Either the primary or the secondary can be fixed while the other moves.

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When three-phase AC power is applied to the primary, a travelling electromagnetic flux wave is induced and moves relative to the primary. The wave induces an electric current in the conductive reaction plate. The induced electric current interacts with the magnetic flux to produce a linear force. The speed of the motor can be varied by changing the input frequency using an adjustable frequency drive.

The primary consists of a three-phase coil assembly, equivalent to the stator of a rotary motor. The three-phase coils are wound and inserted into a steel lamination stack along with thermal protection components. The coil windings and stack are then encapsulated in a thermally conductive epoxy.

The secondary, known as a rotor in a traditional rotary induction motor, is a reaction plate. This plate can be comprised of aluminum or copper, and a steel backing. The reaction plate length is equal to the length of the coil plus the stroke. A bearing system is required to maintain the air gap between the primary and secondary.

See the YouTube Video

https://www.youtube.com/watch?v=bJD5d2-b5ZI

Linear induction motors can be manufactured in a wide range of force outputs, speeds, and footprints. For single-sided assemblies, the reaction plate consists of 1/8″ thick aluminum backed by a 1/4″ thick steel plate, and for double-sided assemblies the reaction plate is 1/8” thick aluminum or copper only. If the reaction plate is round and it has a center shaft with rotary bearings, the system will produce rotary motion.

H2W Technologies Linear Induction Motor Tutorial - Drawing

 

Why Use a Linear Induction Motor?

Linear induction motors are ideal for H2W Technologies Linear Induction Motor Tutorial - Drawingapplications that require rapid movement of large payloads. Linear induction motors can achieve speeds in excess of 1800 inches per second (45 m/s) and accelerations in the range of 3 to 4 g’s. Standard LIMs can produce forces in the range of 720 lbs (3200 N) at a 3% duty cycle. Multiple motors can be used in conjunction with each other to generate larger forces.

Linear Induction Motor Applications

LIMs can be found in theme park rides, water rides, people moving systems, high speed transportation and maglev propulsion applications. Here are some well-known examples:

Hyperloop

Hyperloop is a high-speed transport system for passengers and goods, incorporating reduced pressure tubes, pressurized pods, linear induction motors, and air compressors. Linear induction motors are used to propel and decelerate the pods over the tracks and through the tubes. The LIMs are reversible so the same motor that propels the pod in one direction down the track can be used to propel the pod back to where it started. The pods could potentially “float” on an air bearing to eliminate friction.

Big Thunder Mountain Railroad at Disneyland Resort

Big Thunder Mountain Railroad is one of the first roller coasters to use linear induction motors to accelerate cars out of the station. This allows the cars to start moving at high speeds from a stationary state, without the typical hill-and-chain start. The LIMs are also used to park cars in storage.

California Screamin at Disneyland Resort

California Screamin utilizes LIMs to launch the cars of the roller coaster. They are used again further into the ride to accelerate the cars as they travel over the hills.

Tomorrowland Transit Authority at Walt Disney World, Magic Kingdom Park

Linear induction motors power Tomorrowland Transit Authority (formerly known as the People Mover), moving large cars at smooth, slow speeds through Tomorrowland.

Dawwama at Yas Waterworld Abu Dhabi, Yas Island

The first section of Yas Island’s Dawwama water coaster is powered by LIMS. At each of the hills, the linear induction motors launch the tubes through the uphill sections. This method of propulsion in water coasters is called hydromagnetic technology.

Thunder Rapids in White Water Bay, Six Flags Fiesta Texas

Thunder Rapids, to open in 2017, will be the first water coaster is the USA to utilize hydromagnetic technology. Linear induction motors are combined with turbine technology to keep the tube speeding along the slide and over the hills.

 

About H2W Technologies, Inc.

H2W Technologies, Inc. is dedicated to the design and manufacture of linear and rotary motion products that are used in the motion control industry. The complete line of linear electric motors includes: Single and dual axis linear steppers, DC brush and brushless linear motors, voice coil actuators, and AC induction motors. Also offered is a complete line of ball screw, lead screw and belt driven positioning stages.

Other motion control products include: Limited angle torque motors for compact, limited angular excursion rotary servo applications, 3 phase brushless rotary servo motors with matching digital servo amplifiers and permanent magnet linear brakes for fail-safe, zero power braking for baggage handling and people moving applications as well as amusement park rides.

With over 75 years combined experience in the linear and rotary motion field, the H2W Technologies team of engineers offers the optimal solution to the most demanding motion control, requirements.

See Article: https://www.h2wtech.com/article/linear-induction-motor-how-it-works

See Video at Youtube: https://www.youtube.com/watch?v=bJD5d2-b5ZI

See Product: https://www.h2wtech.com/category/linear-induction#productInfo1″

For additional information contact Mark Wilson at H2W Technologies, 26380 Ferry Ct, Santa Clarita, CA 91350; Tel: 888-702-0540, Fax: 661-251-2067, E-Mail: info@h2wtech.com or visit the website at http://www.h2wtech.com

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XY Gantry Robot with Theta-Control from Intellidrives!

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Intellidrives Motion Control Components - XY Gantry Robot

Philadelphia, PA, — Motion Control Components and Systems – Repeatability and accuracy are essential characteristics of any motion control system, and the objective of the design is to assure the desired trajectories can accurately follow through the working range of the system.

In traditional XY gantry designs upper gantry member (Y axis) is carried by two identical bottom axes (X1 and X2). Each X1 and X2 axes motor/screw/bearing systems are separated by finite distance orthogonal to the direction of the axes.

INTELLIGENT ACTUATORS can easily “talk over” USB 2.0, Ethenet, RS232, RS485 interfaces and come with powerful yet easy to use software packages. for system start-up and integration, like communication drivers, linkable DLL libraries, National Instruments Labview drivers and VI examples, GUI and easy-to-use DXF conversion software.

Due to the manufacturing precision of the components, such as linear guides deflections, ball screw lead errors, axes misalignment, the variation of the position errors in X1 and X2 axes controllers, XY gantries orthogonality is affected. As Y-axis with load traverses across XY plane, it also introduces X axes position errors that are Y axis position dependent.

The current approach to this design challenge is to implement 2-D position error mapping or suspend Y axis on the flexible members (flexures) and to independently control X1 and X2 axes to assure orthogonality. This approach reduces system bandwidth and provides small range of angle adjustment, usually within not more than 1 degree.

There are also many applications, where large THETA angle is an INTENTIONAL FEATURE of the system design (X-Y-THETA) to allow alignment of the work tool to the non-orthogonally located objects or to align patterns.

See YouTube Video – CLICK HERE

About IntelLiDrives

IntelLiDrives, Inc. manufactures linear actuators, XY tables and rotary tables for the industry, government, science and research institutions around the world. Our precision rotary actuators, XY stages and linear actuators are used in the applications in medical devices, life sciences, semiconductor and electronic assembly manufacturing, data storage, laser processing, military/aerospace, photonics, automotive and test assembly, research and development and other industries requiring high precision and throughput motion control solutions.

For further information on this new product or others in our extensive product portfolio, call 1-215-728-6804 or e-mail Intellidrives at sales@intellidrives.com.com or go Intellidrive – Contact Us at: www.intellidrives.com/contact-us

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Motion Control Application- Maxon Drives Help People Walk Again!

At the first Cybathlon in Zürich, researchers are presenting the world’s best exoskeletons – devices that enable paraplegics to walk again. Motors from Switzerland play a central part in this development.

Maxon motion control application - Helping People Walk Again

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Fall River, MA — Motion Control Components Application – On October 8th 2016, people with paraplegia are going on a footrace at the Cybathlon in Zürich. Aided by exoskeletons, they will compete against each other on an obstacle course to show the public how far advanced technology has come in this area.

Switzerland, is playing a central role in this process. Many of the exoskeletons are fitted with components from the canton of Obwalden – components without which there wouldn’t be a lot of movement to be observed.

From the planet Mars to an exoskeleton

Robotic suits have to be both powerful and lightweight. Too much weight would cause the battery to drain in no time. This presents a big challenge to developers. Most of the motors that are strong enough to power an exoskeleton are large and heavy. This is why engineers are turning to the Swiss company that already developed the drives for NASA’s Mars rovers: maxon motor. maxon drives are powerful, lightweight, and energy-efficient, meaning that they can conserve battery power, and be very durable.

“We spent decades perfecting our motors”, says maxon CEO Eugen Elmiger. A lot of money has gone into research and development. It was worth it: These days, the motors from Switzerland can be found everywhere, in robots, airplanes, cars, and medical devices.

Knowledge yields an advantage in the market

Providing competent technical support for customers is just as important as delivering high-quality products. Small businesses and start-ups often approach maxon with specific drive technology problems that they lack the expert knowledge to solve by themselves. maxon motor, in turn is able to help with its extensive experience in the field, a strength that lets the company stand out from the international competition. “Our knowledge and the ability to give expert advice are a great advantage in the market,” says Elmiger. The Cybathlon is a good example: In the field of exoskeletons, the Swiss company has a pretty clear idea about what’s important besides choosing the right motor. As a result, quite a few of the participating teams are using products from Switzerland. The same is true for other disciplines, such as prosthetic arms or legs and electrical wheelchairs.

For examples, read maxon’s exclusive Cybathlon brochure or visit the new site for technology enthusiasts – drive.tech

maxon supports the Cybathlon as a sponsor and partner

The Cybathlon games are organized by the ETH Zürich and are being held for the first time on October 8, 2016 at the Swiss Arena in Zürich. Around 80 teams from all over the world will be participating. The machine-assisted competitors will compete against one another in six disciplines: prosthetic legs, prosthetic arms, exoskeletons, motorized wheelchairs, bicycles with muscle stimulation, and virtual racing using thought control. What’s not allowed at the Paralympics is an absolute must at the Cybathlon: the use of state-of-the-art technology. “Our aim with the Cybathlon is to break down barriers between the general public, people with disabilities, and scientists,” says ETH professor Robert Riener, who invented the Cybathlon.

The Swiss drive specialist maxon motor supports the Cybathlon as a sponsor and partner. The company will be present at the games with a workshop for the teams and a small exhibition about the history of prosthetics.

Comprehensive documentation and software are included with every delivery, and are also available for you to download from our website at www.maxonmotor.com.

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