BB 10003-prototype electric locomotive for the TMST

The TransManche Super Train (TMST), due to enter passenger carrying service in 1993, will operate between the three capitals: London, Paris, and Brussels via the Channel Tunnel. In answer to the conflict between adopting latest technology or service-proved equipment for the TMST, an electrical prototype locomotive was commissioned. Thus the BB10003, an existing French railways locomotive was refitted with the minimum of electrical equipment required to prove the overall power scheme. The principles of asynchronous vector control from the three supply voltages-750 V DC, 3 kV DC, and 25 kV AC-are described. Also described are the simulated and real inertia test situations, the power conversion philosophy, and the results as they affect the overall project.<>