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 2

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

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
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. Limitation with GTO based system
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 3 Phase AC Electrics for 7000 HP Loco
IGBT Based
3 Phase AC Electrics for 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)

18. PROPULSION SYSTEMS Product Present Technology Know how available New
Likely Gain
Status
Expected EDN Business
6000 HP
AC LOCO
GTO
( BT Design)
BSA entered with STRUKTON and 5 sets of traction Converter (along with 3 sets of Aux. Converter) ordered on STRUKTON
Retain Present
Business
Know How
BHEL got order for 5 sets of Traction Converter for Retro fitment of GTO equipment by IGBT equipment.
BHEL has quoted with Struckton for 30 sets loco. BHEL – L1. Substantial qty of orders expected.
Total for all Loco and EMU systems indicated by IS in XI plan is Rs.870 Crores.
VCU MICAS based
( B T Design)
BSA with STRUKTON Signed for TCN Based System
3 sets order received
(Rs.15 Million). Order placed on STRUKTON
7200HP
NIL
IGBT - TOSHIBA
Up-gradation to 7200 HP
MOU route
Limited Know How.
MOU signed with Toshiba in May 07
Single tender for 10 sets being addressed . Technical Offer submitted.
Critical PCBs and Software not covered. IS to pursue .
10000 – HP
AC Freight Locos for DFC
Dialogue to be initiated with Toshiba once IR finalises the specifications.
Continuation of Toshiba Loco technology at EDN for manufacturing
Decision awaited from IR.

19. PROPULSION SYSTEMS Product Present Technology Know how available
New Technology
Likely Gain
Status
Expected EDN Business
4000 HP
Diesel loco
NIL
IGBT Technology
Know How
BHEL quoted for 85 sets Loco eqpt. along with Strukton BHEL – L4.
Development order may be expected.
Total for all Loco and EMU systems indicated by IS in XI plan is Rs.870 Crores.
1600 HP
AC EMU / MEMU
GTO
(AC/ DC EMU
Traxis Design )
STRUKTON
BSA with M/s Strukton signed on 15/11/ Prototype built. Development
BHEL quoted recently for 60 sets AC EMU eqpt. along with Strukton. BHEL – L1
DEMU
BSA with Strukton signed on 15/11/2007
BHEL quoted for 2 sets DEMU eqpt. along with Strukton. Under Evaluation.
EMU for
Urban Transprtn.
IGBT Technology
EMU – DMRC type
Partner to be identified - IS

20. Thank you