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General information
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Description
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General criteria
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Status of development: in use |
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In the course of the last years, all major manufacturers of railway traction technologies have completely migrated to IGBT technology. This migration has already taken place some years ago in the MU segment and is presently taking place in the locomotive segment of around 7 MW. |
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Time horizon for broad application: now |
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(no details available) |
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Expected technological development: highly dynamic |
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Although IGBTs have reached maturity, R&D dynamics is still high in this
field, Major aims are:
- raise blocking voltages
- increase switching frequency
- reduce losses
- reduce weight
The IGBT itself is integrated in a complex power module which includes
besides the transistor the circuits and the cooling etc. These "peripherals"
offer even more potential for future optimisation than the IGBT
itself. |
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Motivation:
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Energy efficiency |
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Benefits (other than environmental): big |
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- Reduced switching losses (compared to GTO)
- Less cooling required (no organic coolants required)
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Barriers: low |
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Refurbishment costs
Refitting old vehicles with IGBTs is usually not profitable (for present
energy prices). Diffusion is therefore essentially limited to stock
renewal. |
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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, diesel
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Type of transportation: passenger - main lines, passenger - high speed, passenger - regional lines, passenger - suburban lines, freight
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IGBTs are generally applicable to electric traction motors. This includes electric and diesel-electric traction.
Refitting old vehicles with IGBTs is expensive, but has been realised in some cases, e.g. NS Reizigers has refurbished their Sprinter train sets with IGBT choppers. |
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Grade of diffusion into railway markets:
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Diffusion into relevant segment of fleet: 5 - 20% |
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Share of newly purchased stock: > 50% |
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Diffusion into relevant segment of fleet
Most fleets have already a considerable share of vehicles with IGBTs, others
like the SBB fleet don't have any IGBT stock yet.
Share of newly purchased stock
Siemens claims that virtually all electric rail vehicles presently produced
at Siemens Transportation are based on IGBT traction systems. |
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Market potential (railways): high |
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(no details available) |
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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: > 5% |
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Other environmental impacts: positive |
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Economic criteria
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Application outside railway sector
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Status of development outside railway sector: in use |
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Time horizon for broad application outside railway sector: now |
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Expected technological development outside railway sector: highly dynamic |
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Market potential outside railway sector: high |
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Overall rating
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Overall potential: very promising |
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Time horizon: short-term |