Abstract: In a field winding for a rotor (12) in an electrical power generator, a slip plane (36) between the top winding (28) of the rotor and the stack of windings below the top winding to reduce the thermal strain energy in the rotor. The slip plane allows the winding stack to slide underneath the top winding to relieve thermal stress in the stack. Because the top winding is isolated by the slip plane, thermal stresses created in the top winding are confined to the top winding. Similarly, the corners (44) of the end turns (18) for the top winding are wider than the end turn corners of the underlying winding stack. These wide top end turns abut the corner end blocks (46) for the field winding. The winding stack underneath the top turn is free to expand from thermal excitation, because the end turns of the stack are not confined by corner end blocks.

Abstract: The dynamoelectric machine has endwindings including a plurality of superposed conductor bars 22 and adjacent end turns 20. Rabbets 32 are formed along the undersides of the adjoining conductor bars and end turns to receive portions 34 of gussets 30, remaining portions 35 of the gussets projecting to one side of the joint. The conductor bars and end turns have grooves 38, 36 forming cooling passages with ports 42, 40 opening to one side of the joint short of the joint. The gusset 30 has a barrier 44 spaced from the joint and forms with the ports a cooling channel 46 between the ports for transporting cooling gas between the cooling gas channels of the conductor bars and end turns.

Abstract: Apparatus and method for transmitting condition data from a rotating member to a stationary device is disclosed wherein digitized data obtained from a plurality of sensors is transmitted from the rotating member to the stationary device through a system of light emitting diodes on the rotating member which flash light signals in a preselected digital sequence. The data so obtained is received by a system of stationary receivers, and thereafter decoded and processed for utilization. Electric power for the rotating components is obtained by using the kinetic energy of the rotating member.