The paper presents a method of grading the winding of a linear induction motor in order to compensate the effect of the motor winding finite length. Two kinds of winding are proposed: those graded by amplitude and by amplitude-phase. The sought amplitude and phase distribution are obtained from a condition that induction in the airgap for the motor in question should be the same as that for an infinitely long motor without end effects. Two methods of the description of the magnetic field in the motor are used: the first — using Fourier series and the second — Fourier integral. Es werden zwei Wicklungsarten vorgeschlagen: Die Amplitudenmodulation und die Amplituden-Phasenmodulation.
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An induction motor is one in which the current in the rotor is induced by the electromagnetic field in the stator, eliminating the use of magnets. A linear induction motor is a type of linear motor based on a rotary AC induction motor. Like permanent magnet linear motors commonly designated as ironless and iron core types linear induction motors consist of a primary part analogous to the stator in a rotary induction motor and a secondary part analogous to the rotor in a rotary version. The primary consists of a three-phase winding assembled on a steel lamination stack and encapsulated in epoxy. When power is supplied to the primary, magnetic flux develops and travels across the length of the primary.
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A hyperloop pod is a theoretical transportation pod that can travel at several hundred miles per hour in a vacuum sealed tube. While there is a decrease in initial power output, the LIM allows for less rail contact, friction, weight, and wearing down of parts. A LIM also allows for decreased losses and higher speeds relative to rotary motors.