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   Transversal flux motor  evaluated  
Transversal flux machines represent an alternative to asynchronous traction motors. Due to high power density and high efficiency transversal flux motors increase overall energy efficiency of power train.
Technology field: Optimisation of traction technologies
open main section General information
close main section General criteria
  close sub-section Status of development: research & experiments
    Research at DB AG and manufacturers.
  Time horizon for broad application: in > 10 years
    (no details available)
  Expected technological development: highly dynamic
    (no details available)
    Motivation:
   
  • High energy density
  • Wheel-mounted construction
  Benefits (other than environmental): big
   
  • High energy and torque densities
  • Wheel-mounted construction
  • Low weight: According to DB research, weight/power ratio is reduced by 2/3 compared to asynchronous motor drive including gears (from 2,27 kg/kW to 0.73 kg/kW).
  Barriers: high
    Complexity

Transversal flux machines require more inverter equipment (4 inverter branches) than asynchronous motors. Core design and assembly are complex.

Performance

Torque density is high, but power factor is low.

Asymmetries

Transversal flux machines tend to develop asymmetries due to their non-concentric structure.
    Success factors:
    (no details available)
  Applicability for railway segments: high
    Type of traction:  electric - DC, electric - AC
    Type of transportation:  passenger - main lines, passenger - high speed, passenger - regional lines, passenger - suburban lines, freight
    If barriers are overcome, transversal flux machines will have broad application fields in railways: namely the entire electric fleet in both local and main line service.
    Grade of diffusion into railway markets:
  Diffusion into relevant segment of fleet: 0 %
  Share of newly purchased stock: 0 %
    Not in use yet.
  Market potential (railways): highly uncertain
    Transmissibility high, but barriers pose doubts on wide-spread introduction.
    Example:
    (no details available)
open main section Environmental criteria
open main section Economic criteria
no data available Application outside railway sector (this technology is railway specific)
open main section Overall rating
References / Links:  DB AG 1999;  DB AG, FTZ 1999
Attachments:
Related projects:  High performance motor for direct drive
Contact persons:
 date created: 2002-10-03
 
 
© UIC - International Union of Railways 2003
 
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