Two alternate attraction magnetic suspension systems are discussed on a magnetic performance basis, as well as on their lift-to-weight (

) capabilities. On an equal current basis, the lower reluctance, flat track configuration has higher lift force and better

than the U-shaped track configuration with its larger leakage flux. With equal magnetization (unequal currents) and low guidance forces (

), the U-shaped track has a higher

ratio, but both attraction systems suffer from low

when all elements of the suspension system are considered.