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TRACTION PRODUCTS

TRACTION PRODUCTS. MOHAMED SABITH KT M110212EE. Locomotive Designation. Based On Input Energy Source Steam Locomotives Diesel Locomotives - Diesel Hydraulic - Diesel Electric Electric Locomotives - AC - DC. Anatomy Of Electric Locomotive.

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TRACTION PRODUCTS

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  1. TRACTION PRODUCTS MOHAMED SABITH KT M110212EE

  2. Locomotive Designation Based On Input Energy Source Steam Locomotives Diesel Locomotives - Diesel Hydraulic - Diesel Electric Electric Locomotives - AC - DC

  3. Anatomy Of Electric Locomotive Vehicle Control Electronics Bogie Traction Converter Traction Transformer

  4. Bogie Powered Axle .

  5. Contemporary Propulsion System

  6. AC Drive Implementation - Locomotive 25 kV, 50 Hz, 1Ø DC Link = ~ 3 Ø IM ~ 4Q Control Front End 3 Ø Inverter Near Unity Power Factor Harmonic Reduction on Line Current….Staggered Pulsing Between Converters, Between Bogies, Between Locos, Between Trains

  7. Converter Controls – Overview

  8. Converter & Vehicle Control Electronics Vehicle Control Electronics Converter Electronics

  9. GTO Based Traction Converter

  10. ADVANTAGES OF 3 PHASE AC DRIVE TECHNOLOGY : • 3 Phase technology uses GTO Thyristors / IGBTs and Pulse Width Modulation (PWM) techniques on the Converter as well as the Inverter side with digital controls for driving 3 Phase Squirrel Cage Induction Motor. • 3 Phase technology has the advantage to work at Unity Power Factor and draws sinusoidal current from the catenary. • Use of regenerative braking results in energy saving upto 30%, giving fast payback. • Use of Squirrel cage Induction Motors results in virtually no maintenance as compared to conventional DC Drive systems.

  11. Regenerative Braking • Pneumatic braking • Electric braking has fast response-no air requirement • Fast to act • Fast to release • No wear of brake components-higher life of components • Braking energy is not wasted but back to the grid • Measurements show savings range between 12-30%

  12. CONTD…. At an average cost of electricity a 3-Phase loco will produce electricity worth Rs 7.33 Crore in its service life. Taking the present cost of 3-Phase loco as Rs 13 Cr, the loco pays back more than half of its cost by regeneration only These are self debt-servicing locomotives

  13. Locomotives with BHEL equipments Passenger Loco WAP 7 WAP 5 Freight Loco WAG 9

  14. AC EMU

  15. Crux – Present System • Limitation with GTO based system • Requires large gate drivers and snubber circuits, hence higher losses • Obsolescence of power device GTO and electronic components • Proprietary ASIC’s and Hybrid circuits • Platform dependant control architecture, RTOS and software tools • Proprietary protocol, inability to configure third party hardware & software

  16. Future Trend • IGBT Based • 3 Phase AC Electrics for 7000 HP Loco • 3 Phase 6000 HP AC Loco • 3 X 130KVA Auxiliary converter for 6000HP loco • 500KVA Hotel load Inverter • FPGA

  17. Customer’s Profile • Railway Board -> Initiate development projects for AC EMU/LOCO tender. • RDSO -> Nodal agency for all technical approvals • CLW -> Manufacturing of AC Locomotives Invites tender for 6000 HP Converter/ Inverter Systems • DLW -> Manufacturing of Diesel locomotives Invites tender for 4500 HP Converter/ Inverter Systems • ICF Chennai -> Manufacturing of AC EMU/DEMU equipment (1600 HP)

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