“Patents
Novel motor stator coil
CN 202602415 U
…
The novel motor stator coil is simple, compact and reasonable in structure, convenient and rapid to assemble and reliable in connection, and when an locomotive runs to generate vibration, the stress function is buffered by the omega rings, the condition that the connecting line of the coil is broken is effectively reduced, the service life of the coil is prolonged, the operating reliability of the stator is greatly improved, and the novel motor stator coil is easy to use and popularize.
…
[0002] the main line by the two stator composed of linear, ring soldered directly on the bus, and the bus line no buffer zone between the rings, vibrates when the locomotive line with a greater convergence between the rings force, making the line causing cracking or breaking the stator burning, such as failure, a serious impact on product quality and traffic safety.”
( http://www.google.com/patents/CN202602415U?cl=en )


“Patents
Method and apparatus for insulating liquid-cooled stator coil headers and connectors
US 4982122 A
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In order to electrically connect the adjacent stator coils, a copper connecting bar 20, having a pair of holes, is fitted over the adjacent pair of stator coil headers 10.
…
Integral water-cooled circuit ring/bus bar assembly for high frequency generators”
( http://www.google.com/patents/US4982122 )