Train Tilting Technology

As a leading global supplier of electromechanical drive systems, we have developed technology and products designed for the most challenging environments. Used to improve passenger comfort, one such development is the electro-mechanical high-speed train tilting drive system.

As a train speeds around a curve the people and objects inside can be misplaced or thrown off balance due to its centripetal force, often causing passenger discomfort. Passenger discomfort is reduced by tilting the coach body towards the inside of the curve. A sensor system mounted on the forward bogie detects the changing track motion and a train-tilting computer transmits the optimum tilting angle for each coach, via a multi-vehicle bus, to the individual coach-tilting computers that control the tilting drives.

The linear tilting drive is designed as a compact, low-backlash transmission unit. AC synchronous motors equipped with rare-earth magnets are used as e-motors . The rotary sensor that detects the angular position of the motor shaft is a digital encoder with an incremental transmitter. The sensor also makes it possible to measure the absolute value of the linear drive position. The position control circuit can therefore be designed without additional external position sensors.

Our train tilting technology enables an angle of approximately +8˚ and produces exceptionally responsive tilting due to high precision positioning in conjunction with fast reaction times, resulting in smooth car body movements.

  • Higher curve speed
  • Greater passenger comfort
  • Reduced travelling time
  • Used on existing tracks
  • Lower power consumption
  • High power density
  • Noise reduction
  • Low life cycle costs
  • Compact, light-weight components
  • EMI protection (EN 61000-4-2 and EN 50121-3-2)
  • High reliability
  • Separate power and  signal electronics
  • Highly modular
  • Low-voltage power supply for safer handling
Tilting train system components

Tilting System Components

  • Tilting drive for bogies (CTD)
  • Tilting drive for current collector (Pantograph) (PTD) 
  • Intelligent drive unit (Power electronic)  (DRUI)
  • Train tilting computer (TTC)

Safety Features

As an ISO-certified company, we are familiar with inter-national industry standards (especially IEC, VG, EN) and act strictly and consistently according to these standards.

Dual path read-in of position encoders:

  • Position encoders read-in with RS-485 and pulse count

Security loop:

  • Hardwired and watchdog-controlled
    Auto system shutdown if components fail

System options:

  • Continuous comparison of both position bogies
  • 2nd position encoder for each bogie optional
  • 2nd position encoder for pantograph optional

Safe RS-485 data links

  • SDLC mode
  • Life sign transmission between all system components
  • CRC16 on application layer

Continuous BIT (built-in-test)

Damped self-centering when de-energized

  • Downloads
Supply voltage 24 VDC, 610 VDC (EN 50155) (3-phase conversion possible)
Power Up to 15 kW per axis
Tilting range Typically +
Error log Last 1,000 events
Typical travelled distance per year > 350,000 km
Typical first overhaul 3 years for rubber parts
Typical first main revision 7 years for worn out parts
Service life 40 years, wearing parts >7 years
Shock, vibration, contamination, dust, salt fog, temperature IEC 61587-T2
BN 411002
EN 50155
EMI EN 61000-4-2
EN 50121-3-2
EMC EN 50122-2
IEC 61587-T3
BN 411002
VG 95373 P15
Error log EN-ISO-14121-1_2007
EN-50129 (Railway)
Protection class EN 60529
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