Abstract
This paper presents a mechatronic approach for the detection of wheel slip/slide and antislip control of locomotive with ac traction motors, to enable an optimal use of adhesion in poor contact conditions. The proposed technique explores the variations in wheelset dynamic properties caused by condition changes at the wheel-rail contact and detects slip conditions from measurement of train speed with internal optical encoder of the wheelset axle indirectly. The modeling of a typical traction system, consisting of an induction traction motor (with associated power inverter and field-orientated control) connected to a wheelset via a gearbox, is introduced. The development of the slip detection and control scheme is presented, and the effectiveness of the proposed technique is demonstrated using computer simulations.
Highlights
Serbian Railways (ŽS) has ordered 21 electric FLIRTs (Fast Light Innovative Regional Train) from Stadler Rail for commuter rail services in the Belgrade region. This generation electric multiple unit FLIRTs use AC motors for wheel set traction motor that are significantly more reliable and unsophisticated if compared to the previous DC motors used for drives
The non-traditional computer aided slipping an sliding control system of locomotive AC traction motors that is proposed by the authors allows automatic continuous control of electrical parameters of the AC-DC recifer and the inverter in traction mode with the simultaneous slipping process control
When the provided slip and slide control system of locomotives with AC traction motors is used, train driver does not need to interrupt traction mode control and this way there are no conditions for the formation of the rolling stock longitudinal tensile and compression forces
Summary
Serbian Railways (ŽS) has ordered 21 electric FLIRTs (Fast Light Innovative Regional Train) from Stadler Rail for commuter rail services in the Belgrade region. The line-side converter is able to operate in all four quadrants, independently controlling active and reactive power Great features of this technology are the possibility for feeding power back into the network when regenerative braking and improving active power flow by Branislav Gavrilovic: A Mechatronic Approach for the Detection of Wheel Slip/Slide and Antislip Control of Locomotive with AC Traction Motors inductive and capacitive reactive power. Control of these systems is complex but it is all carried out by microprocessors. There are examined various electric multiple unit construction schemes with AC traction motor drive
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