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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Motion Control – Frameless Brushless Torque Motor from H2W Technologies, Inc.

Motion Control Component - Franmess Bruchless Torque Motor ARC Segment

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Santa Clarita, CA —– Linear Motion Control Components – H2W has developed an unhoused arc segmented frameless brushless torque motor (TWR-070-410-1150-3PH) with low inertia moving coil assembly for high angular acceleration applications. The rotary 3-phase brushless motor, also known as a rotary servo motor, is a direct drive motor that is ideal for limited or unlimited, closed loop servo, rotary motion applications. It can generate a continuous/peak torque of 480 in-lbs [53 Nm]/1440 in-lbs [159 Nm]. It has been designed to have a 70° rotation and operate on a 20” (500 mm) radius, but additional modular magnet tracks (33° each) can be added to increase angular displacement. It is capable of very precise position, velocity, and acceleration control when coupled with a rotary encoder for position feedback

The vacuum encapsulated moving motor coil assembly moves through a gap in the long U shaped magnet assembly. A customer supplied bearing system is required to guide the moving coil assembly and to maintain a .050″ [1.25 mm] clearance between the magnet and the coil assembly. There is no attractive force between the motor coil and the magnet assembly. The 3-phase motor coil assembly can be commutated trapezoidally using integral hall effects or commutated sinusoidally using software commutation in conjunction with the appropriate amplifier, motion controller and encoder feedback. The power to the motor, from a brushless servo amplifier, is supplied via a high-flex motor power cable. Motors can be designed to fit customer specific application requirements.

Features:

  • Zero cogging
  • High speed and accelerations of light loads
  • Low inertia
  • Multiple motors coils inside a single magnet assembly
  • Uses standard 3-phase brushless amplifier

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 Drawing PDF: CLICK HERE

See Product: CLICK HERE

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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Motion Control App – Linear Motion Calculator Android App from H2W Technologies, Inc.

H2W Technologies Linear Motion Control Android Calculator

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Santa Clarita, CA —– Motion Control – Android App – To help our customers understand their motion requirements and translate them into acceleration and force values, H2W Technologies has developed an Android application that solves linear motion calculations, with a range of velocity profiles. This helps the user understand which product might work best for their particular application. The motion profiles available in the calculator include triangular, trapezoidal, and sinusoidal acceleration. In addition to the motion profile calculators H2W has included force and duty cycle calculators to help give a more complete understanding of an application’s requirements and constraints.

The Linear Motion Caculator App for Android is available at Google Play

A web version of the linear motion calculator can be found here.

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.

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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Linear Motion – Vacuum Compatible Single Rail Stage!

Linear Motion – Single Rail Stages – SRS-008-04-020-01V

Santa Clarita, CA – Linear Motion Control – The SRS-008-04-020-01V vacuum compatible single rail positioning stage uses a brushless linear motor to generate a continuous/peak force of 20.6 lbs [91.6 N]/61.8 lbs [275 N] with a total stroke length of 8.3 in [210 mm]. The non-contact 1.0-micron resolution encoder allows for precise positioning. It is guided by a rigid recirculating ball linear bearing. There are also provisions that allow customer cables to be routed within the cable carrier. This single rail positioning stage has been manufactured using low-outgassing materials as selected by NASA in order to make it vacuum compatible. It has end-of-travel bumper stops. A home positioning sensor, end-of-travel-sensors, and custom mounting holes on the moving table are available upon request.For a detailed description of all the considerations taken when manufacturing a vacuum compatible system, please click here.

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Stroke 8.3 in 210 mm
Encoder Resolution 1.0 micron
Bearing Type Recirculating Ball
Moving Mass 3.5 lbs 1.6 kg
Total Mass 18.0 lbs 8.2 kg
Resistance @ 20C 8.1 ohms
Inductance @ 20C 6.0 mH
Electrical Time Constant 0.70 msec
Motor Constant 2.1 lbs/√watt 9.4 N/√watt
Force Constant 6.1 lbs/amp 27.3 N/amp
Back EMF 0.80 V/ips 31.5 V/m/sec
Force @ 100% Duty 20.6 lbs 91.6 N
Power @ 100% Duty 95.0 watts
Current @ 100% Duty 3.4 amps
Force @ 10% Duty 61.8 lbs 275 N
Power @ 10% Duty 846 watts

For drawing go to https://www.h2wtech.com/pdf/2014-05-21-22-56-32.PDF

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.

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 athttp://www.h2wtech.com

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Linear Motion – Miniature Voice Coil Actuators from H2W Technologies, Inc.

Linear Motion Miniature Voice Coil Actuators

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Santa Clarita, CA — Linear Motion Actuators — H2W Technologies offers miniature versions of both our moving coil and moving magnet voice coil actuators. Additionally, we offer custom designed solutions to meet your application specifications.

H2W has built its smallest moving magnet voice coil actuator (NCM01-04-001-2IB)to date, with an outside diameter of 0.40 in [10 mm] and a length of 0.735 in [18.8 mm]. It has a stroke of 0.10 in [2.5 mm] and generates a continuous force of 0.10 lbs [0.45 N] and a peak force of 0.30 lbs [1.35 N]. It weighs just 0.20 ounces [5.7 grams]. This actuator utilizes a hardened shaft and sliding contact bushing to ensure long life, and is ideal for oscillatory motion. The compact design allows the actuator to be used in a number of handheld applications. Moving magnet voice coil actuators have built-in bearings so there is no need for the customer to add mass or complexity to their motion system to integrate a bearing, and there are no moving leads to worry about cable management.

Our smallest moving coil voice coil actuator (NCC01-04-001-1X) has an outside diameter of 0.44 in [11.1 mm] and a length of 0.36 in [9 mm]. It has a stroke of 0.13 in [3.2 mm] and generates a continuous force of 0.06 lbs [0.27 N] and a peak force of 0.18 lbs [0.8 N]. It weighs just 0.20 ounces [5.7 grams]. The bobbin has been constructed of plastic to prevent any damping forces that a metallic bobbin would create. The compact design allows the actuator to be used in a number of handheld applications.

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.

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 athttp://www.h2wtech.com

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