Open-Sided-Coil Linear Induction Motors & Self-Assembling Magnetic Core Fabrication

Product of Terreplane Technologies, LLC

  • InnoTrans 2018
  • Hall 2.2 405

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4 Bingham
Columbia, MO 65203
United States of America

  • InnoTrans 2018
  • Hall 2.2 405

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Product description

Linear Induction Motors (LIM) provide non-contact propulsion on over a dozen train systems worldwide. Now they can be made:
  • Lower-Cost,
  • Lighter-Weight,
  • In More-Complex Configurations, and
  • With Greater Capabilities.
The Open-Sided LIM (below) is designed to replace a multiple-ton train chassis (including electric motors) with a 100 mm diameter cylinder-shaped LIM that weighs less than 200 kg.

This product offering includes devices and manufacturing methods early in their patent life. Please visit the booth or web site ( for more information.

Open-Side LIM (motors)
The Open-Sided Linear Induction Motor (LIM) transforms a cable into a high performance transportation guideway. Applications range from conveyers (elevator/lift or assembly line) to inter-city transit. Magnetic forces both center the cable in the cylinder-shaped LIM and provide propulsion without contact and without the wear/tear/maintenance associated with contact. A slot (hence the name, open-sided) along the side of the cylinder allows the connectors that connect the zipline-type guideway (the armature) to pass without hitting the LIM stator/chassis.

Self-Assembling Core (manufacturing method)
Self-Assembling Core manufacturing is a method where electromagnet cores self-assemble to produce lighter-weight and more-complex complex motors at a fraction of the costs of alternatives. The steps of the basic manufacturing method include:
  1. Prepare a mold of the electromagnet device (such as the casing and stator of a motor).
  2. Insert the electromagnet coils into the mold.
  3. Inject a thermosetting ferromagnetic [particle] mixture into the mold.
  4. Apply a magnetic field to the coils to assemble the ferromagnetic particles into the optimal density profile based on the particle loading.
  5. Enhance the mixture and self-assembly process before it sets.
This method is able to:
  • mold the core around the electromagnet coils, reducing gaps in the core and improving performance;
  • mold the motor housing/casing and electromagnet cores [around the coils] in a single step and as a single body;
  • allow complex electromechanical components to be manufactured from 3D prints/molds/dies in a manner that is custom, low-volume, and lower cost than high-volume stamping-production methods.
Three patents incorporate multiple claims on this technology.
  • PCT/US15/07799, Terreplane Transportation System, published.
  • PCT/US17/61003, Glider Transportation System, published.
  • Provisional USXXX, Electric Motor Related Inventions (anticipated publication, May 2019).
The basic defining of the open-sided coil dates to the 2015 PCT application. The 3-phase LIM chassis (capable of replacing a multiple-ton railcar chassis) dates to the 2017 PCT application. The self-assembly core manufacturing methods are still only in the provisional patent application stage with PCT filing to be in late 2018.