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General information
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General criteria
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Status of development: research & experiments |
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Research at DB AG and manufacturers. |
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Time horizon for broad application: in > 10 years |
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(no details available) |
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Expected technological development: highly dynamic |
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(no details available) |
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Motivation:
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- High energy density
- Wheel-mounted construction
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Benefits (other than environmental): big |
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- 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).
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Barriers: high |
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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. |
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Success factors:
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(no details available) |
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Applicability for railway segments: high |
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Type of traction: electric - DC, electric - AC
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Type of transportation: passenger - main lines, passenger - high speed, passenger - regional lines, passenger - suburban lines, freight
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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. |
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Grade of diffusion into railway markets:
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Diffusion into relevant segment of fleet: 0 % |
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Share of newly purchased stock: 0 % |
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Not in use yet. |
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Market potential (railways): highly uncertain |
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Transmissibility high, but barriers pose doubts on wide-spread introduction. |
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Example:
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(no details available) |
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Environmental criteria
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Impacts on energy efficiency:
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Energy efficiency potential for single vehicle: 5 - 10% |
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Energy efficiency potential throughout fleet: 2 - 5% |
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Other environmental impacts: neutral |
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Economic criteria
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Vehicle - fix costs: (no data) |
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Vehicle - running costs: significant reduction |
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Infrastructure - fix costs: none |
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Infrastructure - running costs: unchanged |
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Scale effects: high |
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Amortisation: (no data) |
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Application outside railway sector (this technology is railway specific)
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Overall rating
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Overall potential: promising |
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Time horizon: long-term |
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Transversal flux machines are a promising long-term candidate for replacing state-of-the-art traction motors. More R&D is however necessary to overcome current technological shortcomings. |