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

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

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

PMSM is a synchronous motor that uses permanent magnets rather thanwindings in the rotor.

Totally enclosed PMSM in operation since 2007 at Tokyo Metro

Permanent Magnetic Synchronous Motor (PMSM)

Energy Efficient (>30%)

Quasi Maintenance Free

Quieter (12dB noise reduction)

PMSM Benefits

Enclosed!

Energy Efficient 1/2

6

Highly Efficient as no secondary copper losses in rotor

Secondary

Copper Loss

No Secondary

Copper LossPrimary Copper Loss

Induction MotorPMSM

Energy Efficient 2/2

7

Motor Gear WheelInverter

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

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

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

Jul ‘13 Aug Sep Oct Nov Dec

Signed

Contract

Components Designing and Documentation

Conceptual Design Review Preliminary 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

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

Case Study: PMSM Story @ SMRT

12

Simulation Results

Jul ‘14 Aug Sep Oct Nov Dec

FAT / System

Combination

Test

Shipment

(For Trial Train)

Equipment

Installation Manufacturing

Interfacing with other systems

Witnessed by SMRTNoise 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

Case Study: PMSM Story @ SMRT

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)

Thank You