Выпуск 4(10), 2017

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V. A. Solomin, A. A. Bichilova, L. L. Zamshina, N. A. Trybitsina

ADJUSTABLE SQUIRREL-CAGE LINEAR INDUCTION MOTOR
FOR MAGNETIC LEVITATION TRANSPORT

Data of reciept 24.05.2017
Decision on publication 07.11.2017

The article deals with linear induction motor (LIM) with a squirrel-cage winding of the
secondary element (SE), which functions as the armature of the machine. Linear location of
squirrel-cage winding of the secondary element of LIM allowed suggesting a number of op-
tions for the regulation of the winding resistance of SE.
Objective. Development and research of LIM with adjustable winding resistance of the
secondary element for magnetic levitation transport, and the study of the properties of adjust-
able LIM.
At the modern level of development of the electrical engineering, asynchronous electric
drive and magnetic levitation transport, the primary method of changing the frequency rota-
tion of motor and speed of linear motion of high-speed transport vehicles is frequency control.
Frequency control allows changing the frequency of rotation of the machine and linear speed
of LIM smoothly and in broad diapason. The high cost of static electronic converters of high
power limits the large-scale application of frequency control. The increase of the current fre-
quency also leads to lower torque and traction.
Results. According to the authors, the application of the adjustable linear induction mo-
tors with variable resistances of short-circuited windings of the secondary elements will allow
to expand the range of control of LIM, intended for high-speed magnetic levitation transport
with the realisation of large traction, including the start (starting the vehicle) by means of cur-
rent displacement in the groove of the secondary element of the LIM.
Conclusion. The linear induction motors of this type, as well as the calculation of the
magnetic field in the groove of the secondary element, and evaluation of the influence of the
current displacement on the starting and controlling features of the machine are considered.

Squirrel-cage linear induction motor, adjustable short-circuited winding, magnetic levi-
tation transport, the magnetic field in the groove, the current displacement in the groove of the
secondary element.

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