Innovative concepts for improving metro mario favaits

1. Innovative concepts for improving metro
rail energy usage, efficiency and
sustainability
Mario Favaits
Senior Vice President, SMRT Corporation
Managing Director, Singapore Rail Engineering Pte Ltd

2. 1. Using Permanent Magnetic Synchronous Motor (PMSM) Technology to reduce
power consumption, noise pollution and maintenance requirements on metros
2. Case study: SMRT’s assessment of Permanent Magnetic Motor Technology
3. Making your metro a ‘earth-friendly’ metro
Content

3. 1. Using Permanent Magnetic Synchronous Motor (PMSM) Technology to reduce
power consumption, noise pollution and maintenance requirements on metros
2. Case study: SMRT’s assessment of Permanent Magnetic Motor Technology
3. Making your metro a ‘earth-friendly’ metro
Content

4. 4
PMSM is a synchronous motor that uses permanent magnets rather than
windings in the rotor.
Totally enclosed
PMSM in operation
since 2007 at Tokyo
Metro
Permanent Magnetic Synchronous Motor (PMSM)

5. Energy Efficient (>30%)
Quasi Maintenance Free
Quieter (12dB noise reduction)
PMSM Benefits
Enclosed!

6. Energy Efficient 1/2
6
Highly Efficient as no secondary copper losses in rotor
Secondary
Copper Loss
No Secondary
Copper LossPrimary Copper Loss
Induction Motor
PMSM

7. Energy Efficient 2/2
7
Motor Gear Wheel
Inverter
Loss of Filter
reactor = 3%
Loss of
Inverter = 2%
Loss of
Motor= 9%
Loss of Gear
= 2.5%
Output (AC Motor): 100% - 3% - 2% - 9% - 2.5% = 83.5%
Output (PMSM): 100% - 3% - 2% - 3% - 2.5% = 89.5%
*Conventional AC motor
By replacing from conventional motor to PMSM,
energy loss reduces from 9% to 3% due to PMSM’s high efficiency.
Energy Input : 100%
Observations:
• Main loss occurs in motor
• Higher efficiency of motor
has a positive effect during
powering and braking
• Impact of replacing IGBT to
SiC IGBT in inverter is
limited

8. PMSM is Quasi Maintenance Free
8
△: Rotor disassembly and cleaning □: Bearing replacement ×: End of Life ○: Sampling Investigation
4 years 8 years 12 years 16 years 20 years 24 years
Self-ventilated
IM △
△
□
△
△
□
△ ×
Totally-
enclosed
PMSM
□ □
○
□
87% reduction in maintenance hours

9. 1. Using Permanent Magnetic Synchronous Motor (PMSM) Technology to reduce
power consumption, noise pollution and maintenance requirements on metros
2. Case study: SMRT’s assessment of Permanent Magnetic Motor Technology
3. Making your metro a ‘earth-friendly’ metro
Content

10. Jul ‘13 Aug Sep Oct Nov Dec
Signed
Contract
Components Designing and Documentation
Conceptual Design ReviewPreliminary Design Review
Project Kick-off
SMRT’s Expectations:
 Energy Saving ≥ 30%.
 Noise Reduction of 12dBA.
 Improved Reliability and Maintainability.
 Payback Period approx. 5 years.
Case Study: PMSM Story @ SMRT

11. Jan ‘14 Feb Mar Apr May Jun
Components Designing and Documentation
Design
ApprovalFinal Design Review
Manufacturing
Interfacing with other systems
System’s Specification was fixed
Conditions for Train Running Simulation
E-W Line 29 stations (43.7 km)
N-S Line 25 stations (41.5 km)
Train Weight AW1 (88 pax/car)
Software Simulation
Case Study: PMSM Story @ SMRT

12. Case Study: PMSM Story @ SMRT
12
Simulation Results

13. Jul ‘14 Aug Sep Oct Nov Dec
FAT / System
Combination
Test
Shipment
(For Trial Train)
Equipment
Installation
Manufacturing
Interfacing with other systems
Witnessed by SMRT
Noise Measurement Test: Achievement of
12dBA noise reduction.Jan ‘15 Feb
Equipment
Installation
Type Test
(Test Track)
Simulated Combined Test revealed 42% energy saving.
Installation was done locally
Case Study: PMSM Story @ SMRT

14. 14
Case Study: PMSM Story @ SMRT

15. Moving Forward
15
Type test – first results clock energy savings of 42%
• April 2015: Commercial run with the first 2 C151 (KHI)
• 2016-2020: Equip remaining 64 C151 (replace of DC motor)
• 2016-2018: Equip 19 C651 trains (replace of AC motor)
By 2020 85 trains will be equipped with PMSM
Mar Apr May Jun
Commercial Service (Trial Run)
Trial will be for minimum 6 months
Now
Type Test (Main Line)

16. Thank You