Determining parameters of electric drive of a sleeper-type turnout based on electromagnet and linear inductor electric motor

Abstract

As a result of the conducted study, we determined parameters of the electric drive of a sleeper-type turnout based on the linear electromagnetic energy converters. By parameters of the electric drive we mean not only the design of a linear electric motor, such as diameters of stator, anchor, their length, the magnitude of air gap, the type of coil, but also availability of additional elements. In this case — availability of the springs that ensure the required force at the motion start. In this case, two variants of the linear motors design were considered and various layouts of electric drive of a turnout, respectively. In both cases, the force from the motor is transmitted directly to the coupling rod between the rail points, which makes it possible to exclude such an additional element as the reducer, which has a relatively low performance efficiency, additional metal consumption and overall size, which also decreases general reliability of the device as a whole. The problem of multicriterion optimization of parameters of electric motors was compiled. Geometric dimensions of the drives were accepted as the variable parameters. The analysis revealed that the best result in the search for global optimum out of 11 variants were demonstrated by the Weyl method (with the mean-square deviation of 680.9N for electromagnet) and the method of cyclic minimum (with the mean-square deviation of 1052.3N for induction motor). The estimation was performed according to results of the optimal (minimal) value of the mean-square deviation of electromagnetic force from the resistance force. As the load we used the 1/22 type of a turnout with the maximum weight of rail points for the Р65 rail. The data of the study are necessary for creating a new class of electric drives of the turnouts, which make it possible to increase the performance efficiency of the device, as well as its performance speed and, in doing so, to contribute to fulfillment of the program of implementation of high-speed traffic in Ukraine. As a result of the studies, it was found that it is expedient to use the proposed systems of electromagnetic energy converters as the new type of source of mechanical energy in the turnout.