Each implementation of the magnetic levitation principle for train-type travel involves advantages and disadvantages. Technology Pros Cons EMS () Magnetic fields inside and outside The separation between the vehicle the vehicle are less than EDS; and the guideway must be proven, commercially available constantly monitored and corrected technology that can attain very high by computer systems to avoid speeds (500 km/h); no wheels or collision due to the unstable nature secondary propulsion system of electromagnetic attraction; due needed. to the system's inherent instability and the required constant corrections by outside systems, vibration issues may occur. EDS magnets and large margin between Strong magnetic fields onboard the (Electrodynamic rail and train enable highest train would make the train suspension) recorded train speeds (581 km/h) inaccessible to passengers with or and heavy load capacity; has magnetic data storage media such demonstrated (December 2005) as hard drives and credit cards, successful operations using in its necessitating the use of ; limitations onboard magnets, cooled with on guideway inductivity limit the inexpensive liquid . maximum speed of the vehicle; vehicle must be for travel at low speeds. System power required to activate Requires either wheels or track —no (Permanent magnets; Magnetic field is localized segments that move for when the Magnet EDS) below the car; can generate enough vehicle is stopped. New technology force at low speeds (around 5 km/h) that is still under development (as to levitate maglev train; in case of of 2008) and as yet has no power failure cars slow down on commercial version or full scale their own safely; of permanent system prototype. magnets may prove more than electromagnets. Neither nor the Superconducting EDS are able to levitate vehicles at a standstill, although provides levitation down to a much lower speed; wheels are required for these systems. EMS systems are . The German Transrapid, Japanese HSST (Linimo), and Korean EMS maglevs levitate at a standstill, with electricity extracted from guideway using power rails for the latter two, and wirelessly for Transrapid. If guideway power is lost on the move, the Transrapid is still able to generate levitation down to 10 km/h (6.2 mph) speed, using the power from onboard batteries. This is not the case with the HSST and Rotem systems.
Each implementation of the magnetic levitation principle for train-type travel involves advantages and disadvantages. Technology Pros Cons EMS () Magnetic fields inside and outside the vehicle are less than EDS; proven, commercially available technology that can attain very high speeds (500 km/h); no wheels or secondary propulsion system needed. The separation between the vehicle and the guideway must be constantly monitored and corrected by computer systems to avoid collision due to the unstable nature of electromagnetic attraction; due to the system's inherent instability and the required constant corrections by outside systems, vibration issues may occur. EDS (Electrodynamic suspension) magnets and large margin between rail and train enable highest recorded train speeds (581 km/h) and heavy load capacity; has demonstrated (December 2005) successful operations using in its onboard magnets, cooled with inexpensive liquid . Strong magnetic fields onboard the train would make the train inaccessible to passengers with or magnetic data storage media such as hard drives and credit cards, necessitating the use of ; limitations on guideway inductivity limit the maximum speed of the vehicle; vehicle must be for travel at low speeds. System (Permanent Magnet EDS) —no power required to activate magnets; Magnetic field is localized below the car; can generate enough force at low speeds (around 5 km/h) to levitate maglev train; in case of power failure cars slow down on their own safely; of permanent magnets may prove more than electromagnets. Requires either wheels or track segments that move for when the vehicle is stopped. New technology that is still under development (as of 2008) and as yet has no commercial version or full scale system prototype. Neither nor the Superconducting EDS are able to levitate vehicles at a standstill, although provides levitation down to a much lower speed; wheels are required for these systems. EMS systems are . The German Transrapid, Japanese HSST (Linimo), and Korean EMS maglevs levitate at a standstill, with electricity extracted from guideway using power rails for the latter two, and wirelessly for Transrapid. If guideway power is lost on the move, the Transrapid is still able to generate levitation down to 10 km/h (6.2 mph) speed, using the power from onboard batteries. This is not the case with the HSST and Rotem systems.
54952471-Maglev-Train.docx