DOI: https://doi.org/10.15802/etr.v0i10.83521

Automatic control of electromechanical double-engine traction complex of mine electric locomotives

О. Н. Синчук, А. Б. Семочкин, В. А. Федотов, Б. В. Жеребкин

Abstract


Electric locomotive train is the main mode of transport in iron ore mines, which facilitates almost 100% of all underground freight. Electric locomotive transport uses up to 18 – 20% of total electric energy (EE) required for mine operations and is the main consumer of EE within the typical iron ore mine. A renewed initiative was sought to resolve the problem of excessive energy consumption involving the development of locally (Ukrainian) built energy efficient thermo-electric material (TEM) based IGBT – converters and asynchronous electric traction motors (electric induction motors).

Torque Vector Algorithm is the preferred method of current control within electric induction motors because of its greatly enhanced performance capabilities. However the twin induction motor traction system which operates in parallel on a common load experiences various torques and momentum forces due to a number of factors which are mechanically linked to specific axles. Equilibration of loads between the twin motors can be achieved with an aid of FUZZY controller/regulator. The controls for multiple - electric induction motor system consists of two stages – the lower stage which includes classic scheme Vector Algorithm control system, and the upper stage which includes FUZZY controller/regulator for input signals setting the rotor speed within motors (individually for each motor).

FUZZY-regulator receives mismatched input signals  and  representative of the actual rotor speed in induction motors  and  with a predetermined value of  and derivatives based on the motors’ rotation speed.

The precise correction signal values  and   generated on the output from FUZZY-regulator are added to the last values of input signals (i.e.  and ) which predetermined the rotation speed within induction motors and are also an input to the controls of the multiple electric induction motor traction system.

Induction motors were subject to full scale laboratory testing to verify the workings and efficiency of automatic control systems within multiple electric induction motor traction setup. Test results show that torque Vector Algorithm method of current control along with the input signal generating system using FUZZY-regulator shows good, promising results.

The use of a “hybrid” system of torque Vector Algorithm method of current control along with upper level FUZZY-regulator is advisable in order to improve physical performance and economic indicators related to the operations of twin induction motor traction systems.


Keywords


automation; electric; electromechanical traction system; mines; fuzzy controller; vector control

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