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Chorus Meshcon Motor :: 5 Times the Punch!

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  • RemyC
    The new Chorus® MeshconT Motor is a high-phase-order AC induction motor/drive system that offers five times the startup or acceleration torque of a
    Message 1 of 1 , Dec 14, 2004
      The new Chorus® MeshconT Motor is a high-phase-order AC induction
      motor/drive system that offers five times the startup or acceleration torque
      of a conventional motor and drive of the same rated horsepower and base
      speed.

      From:
      http://www.chorusmotor.com/press/pr_040803.shtml

      FOR IMMEDIATE RELEASE
      Refers to CHOMF BOREF

      CHORUS MESHCON MOTOR STARTS WITH FIVE TIMES THE PUNCH

      Gibraltar, 3rd August 2004:

      Users of traction motors can get five times as much power on start-up for
      the same size and weight, by switching to the latest Chorus (R) Meshcon (TM)
      motor and drive system. In recent laboratory tests, a 20 horsepower Chorus
      Meshcon system achieved low-speed start-up torques in excess of five times
      those achieved by a conventional three-phase system of the same size, using
      the same current.

      One result is that Chorus Meshcon can provide a starter and generator system
      in the same motor. There are a wide range of applications for which this is
      advantageous. For example, in a car, the starter, which gives high torque at
      low speed, cannot generate power at high speeds. The generator, or
      "alternator", provides electric power at high speeds but does not have
      enough torque to start the engine.

      This basic limitation exists both for permanent magnet DC brushless motors,
      and inverter-fed AC induction machines.

      Chorus Meshcon breaks this mould. Its new winding and drive connections
      allow the motor to act as both a low-speed, high-torque machine (suitable
      for starting an engine), and as a high-speed, low-torque machine (suitable
      for generating power from an engine). The change happens in a fraction of a
      second, allowing the motor to seamlessly switch from starting mode to
      generating mode.

      The latest results from the 20hp Chorus Meshcon drive show that a motor and
      drive designed for high-speed, low-torque generation-type operation is able,
      without any additional loading on the power electronics, to deliver five
      times the torque at low speeds.

      Chorus Meshcon is thus ideal for starter-generators, conveyors, locomotives,
      cargo handling equipment, hoists, printing presses, or any application
      requiring large start-up torques and smaller high-speed loads. Newly updated
      details can be found on the Chorus Motors plc web site at
      http://www.chorusmotors.gi including recent test results.

      Integrated power assemblies for Chorus Meshcon continue to be designed and
      built by Semikron Limited on an exclusive basis. Chorus Motors plc is
      currently working with several motor suppliers to meet customer requirements
      for specific applications.

      "With these superb results from testing, we are now designing motors and
      drives that are clearly superior to any alternative technology." said Isaiah
      Cox, President of Chorus Motors plc. "We are already tendering for contracts
      which, if we are successful, will put our business on a firm footing for
      many years to come."

      Technical Notes:

      The Chorus concept uses concentrated, high-phase order windings which allow
      the beneficial use of harmonics (temporal, spatial, and overload).
      Consequently, a Chorus machine can achieve much higher torque densities than
      a traditional three-phase motor, but with no cost penalty.

      Conventional motor drives cannot output maximum current and voltage to a
      three-phase motor when it is operating at low speed, for example, when
      starting. The proprietary Chorus Meshcon system uses harmonic drive to
      simulate high-speed conditions, so that the motor then draws a higher
      current into the winding slots.

      The result is that a very much smaller drive can be used for the same load,
      without hampering high-speed operation. The same system can, for example, be
      used to start a car engine, and then efficiently produce electrical output
      as a generator once it is running.

      About Chorus Motors:

      Chorus Motors plc (US OTC: CHOMF) is a majority-owned subsidiary of Borealis
      Exploration Limited (US OTC: BOREF). Chorus has developed the proprietary
      Chorus® Star and Chorus® Meshcon electric motor technologies, which offer
      substantial cost and performance improvements over comparable motor and
      drive systems. The Chorus systems produce high torque at startup speeds and
      are ideal for traction applications such as automobiles, trucks,
      locomotives, and ships. Its advantages enable several potentially innovative
      applications in aerospace.

      Borealis is a technology development company founded in 1968 and based in
      Gibraltar in the European Union. Borealis' business is reinventing the core
      technologies used by basic industries, including electric motors, electrical
      power generation, and cooling and refrigeration. For more information and
      forward-looking statements please visit its web site at
      http://www.borealis.gi

      Chorus is a registered trademark of Borealis Technical Limited.

      For further information please contact:
      Chorus Motors plc
      Chris Bourne
      Head of Public Relations
      email: pr@ chorusmotors.gi
      Tel: +44 020 8571 5216
      Fax: +44 020 8455 8701
      http://www.chorusmotors.gi

      Borealis Exploration Limited
      Montagu Pavilion
      8-10 Queensway Gibraltar
      +350.59995 or +350.586.99000
      FAX +1.503.296.2163

      Forward Looking Statement at
      http://www.chorusmotors.gi/fwdlook.shtml

      +++

      The new Chorus® MeshconT Motor is a high-phase-order AC induction
      motor/drive system that offers five times the startup or acceleration torque
      of a conventional motor and drive of the same rated horsepower and base
      speed.

      The Chorus Meshcon system provides high torque at low speeds without
      compromising high-speed operation and performance, enabling the use of
      smaller, lighter, and less expensive motors and drives for equivalent
      performance.

      Potential applications include starter-generators, conveyors, locomotives,
      cargo handling equipment, hoists, printing presses, or any application
      requiring large startup torques and smaller high-speed loads.

      Chorus Meshcon is an advanced version of the basic Chorus Star motor, which
      uses high-phase-order, concentrated windings that allow the beneficial use
      of harmonics (temporal, spatial, and overload) to enhance the main drive
      waveform. Consequently, a Chorus Star machine can achieve much higher torque
      densities than a traditional 3-phase motor, but with no cost penalty

      Both Chorus Meshcon and Chorus Star are motor/drive combinations, harnessing
      the specific system benefits of harmonic drive. They are ideal for traction
      applications at sizes from < 1 hp ranging up to megawatt systems, with each
      version offering a range of competitive advantages depending on the specific
      size and application.

      +++

      Chorus Motors began working on the Chorus® technology in the early 1990s.
      Jonathan Edelson, a recent graduate of Princeton University, had some novel
      ideas for motor (and other) technologies, and Borealis supported his
      research. It was recognized that electric motors are an enormous, if
      low-profile, industry, with annual sales of many tens of billions of
      dollars. If something really innovative could be developed, then the
      potential was very exciting. The goal, then as now, was simple: to
      fundamentally advance motor technology.

      After the electric motor was invented in the 1880s, intensive efforts to
      improve it began. For several decades, scientists and engineers made many
      advances in the technology, but by around 1915, motor engineers had achieved
      technology that was adequate for most purposes, and fundamental development
      practically ceased. Since 1915, motors have been optimized with better
      geometries, fabrication methods, and materials. But the underlying
      principles of AC Induction and DC motors were unchanged and unchanging.

      Since the invention of the variable-speed motor in the 1950s, there has been
      no significant advance in motor science. Motors have been for decades a
      commercial commodity, generally sold for the lowest price and with little
      incentive for, or expectation of, significant improvement. Motors which
      demonstrate higher efficiency do so typically because they use more, higher
      quality materials, not because they operate in a different way.

      Research by governments and universities has been focused on efforts to
      reduce or eliminate the electromagnetic harmonics created by motors. These
      harmonics degrade the performance of motors, reducing their power and
      causing wasteful heating. Motors consume 60% of all electrical power
      produced, and as energy concerns have increased, the destructive force of
      motor harmonics has become a more serious problem. Thus most motor research
      today is aimed at reducing these harmonics.

      Chorus' research, led by Mr. Edelson, concluded that motor harmonics cannot
      be eliminated. But they can be co-opted, or harnessed, into a "chorus" of
      harmonics that can be redirected to support, rather than harm, the
      fundamental torque of a motor. And by harnessing and using the harmonics,
      the Chorus technology enables a motor to achieve significantly greater
      performance than comparable three-phase AC motors, along with better
      reliability and reduced maintenance.

      The Chorus Star motor is based on this harmonic-using, more-efficient
      technology. Chorus Star is fundamentally different from three-phase motors
      because Chorus Star uses more than three phases (typically between 5 and
      18), and these phases are arranged and controlled in a different way.

      More recently, Chorus' scientists have made another advance, the MeshconT
      drive technology, which enables a motor to achieve very high torque even
      while operating at very low startup speeds. Chorus' Meshcon technology is
      probably the most important advance in motor science in a century, and will
      make electric motors far more useful in far more applications. One example
      is that Chorus Meshcon will make it possible to replace hydraulics in many
      applications.

      Chorus' scientists continue to make advances in motor-related fields. Yet
      other technologies in development aim to improve the efficiency of generator
      sets.

      Over the next few years, Chorus aims to make Chorus Star and Chorus Meshcon
      increasingly common names in the motor and drive sector. Initially, products
      are being offered directly to customers, though over time licensing revenue
      should become an important source of revenue for the company.

      Chorus Motors plc is a member of the Borealis Family of Companies, and is a
      majority-owned subsidiary of Borealis Exploration Limited, a technology
      development holding company. Both companies are publicly owned, and their
      shares trade on the over-the-counter market in the United states, Chorus
      under the symbol CHOMF and Borealis under the symbol BOREF.

      +++

      From:
      http://www.defense-aerospace.com/cgi-bin/client/modele.pl?prod=48425&session=dae.5850751.1100599979.QZnSq8Oa9dUAAEpe@HQ&modele=jdc_1

      Boeing Partners Chorus Motors for Demonstration of On-Board Electric Drive
      for Commercial Aircraft

      (Source: Chorus Motors Plc; issued Nov. 8, 2004)

      GIBRALTAR --- Boeing Phantom Works, the aerospace company's advanced
      research and development unit, has selected Chorus Motors plc to design,
      build, and operate a system that should eliminate the use of airport tow
      tugs and jet engines to move most commercial aircraft on the ground at
      airports.

      The use of on-board electric-drive motors would enable pilots to be in
      complete control of their aircraft from gate to gate. Chorus' Meshcon motor
      and drive technology delivers unprecedented overload power density, which is
      ideal for this application.

      Benefits from on-board electric drive include faster flight turnarounds and
      increased fuel efficiency per trip, as well as reduced aircraft noise and
      emissions. It is envisioned that this solution would be applicable to both
      passenger and cargo aircraft.

      Chorus Motors plc is a majority-owned subsidiary of Borealis Exploration
      Limited. Chorus has developed the proprietary Chorus® Star(TM) and Chorus®
      Meshcon(TM) electric motor technologies, which offer substantial performance
      improvements over comparable motor and drive systems.
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