APPLYING OF THE CURRENT CONTROL METHOD IN THE RAIL TRANSPORT ANTISLIP DEVICE
Array
Keywords:
antislip device, motor current control, magnetic flux, pulse width modulationAbstract
Uninterrupted operation of urban passenger transport is the key to the development of any city. Railway transport is dominated by the transport infrastructure of the city: subway cars and trams. The efficiency of these types of transport depends on the reliability of the traction electric motors. During the operation of the rolling stock in road conditions, through which the wheels of the chassis are hanging, the load on the traction motor increases.
Of course, the hitching reduces the traction properties of the traction electric motor, and an increase in the speed of the armature over the permissible value leads to serious damage. An anti-traction device for rail transport has been developed, which extends the possibilities of its use.
The analysis of the known antislip devices and models that are used to identify and stop the slip are treated in paper. A classification scheme for slip protection devices used on rails rolling stock has been developed. Based on the analysis of the means of protection against slipping, certain imperfection was discovered in these devices. A device for stopping slip, in which it is proposed to use the method the magnetic flux and equalizing the revolutions of the slipping wheels has been developed. A new approach is to increase the magnetic flux by adjusting the current of the excitation winding on the basis of pulse-width modulation. An electrical circuit diagram based on connecting the motors into parallel circuits is used. To control the pulse-width modulation, depending on the speed and intensity of slip, a control unit to which current and voltage sensors are connected is proposed. The control unit calculates the rotational speed of the armature of the motors and opens the transistor using pulse-width modulation, which is accompanied by an increase in the current on the excitation windings and an increase in the magnetic flux of the engine, which stops the slipping.
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