A transposed stranded conductor for dynamoelectric machines in which the transposition is incomplete in the slot portion of the conductor so that unbalanced strand voltages occur which are made to balance the strand voltages occurring in the end portions of the conductor. In the preferred embodiments, this result is accomplished by providing untransposed sections in the slot portion of the conductor.
Winding bars of AC machines include a multiplicity of mutually electrically insulated conductor elements, which are transposed according to the Roebel principle. The conductor elements in the two end clip sections and in the active part section are transposed with one another. In order to achieve virtually perfect field compensation in the winding overhang, the conductor elements in the two end clip sections have a transposition of between 60.degree. and 120.degree.. In the active part section, either an incomplete transposition is provided, i.e. the transposition in the active part section is uniform and less than 360.degree., or, given a complete 360.degree. transposition in the active part section a void, i.e. a nontransposed section, is provided in the center of the active part, while the transposition in the active part section outside this nontransposed section is a uniform 180.degree. transposition.
The insulation requirements of a lattice bar for inhibiting glow discharges can be reduced by providing longitudinal notches in the bending portions of the flat spacing conductors in the lattice bar. The notches can be provided on one or both sides of the spacing conductors in dependence upon the degree of twist of the conductors in the lattice bar. The extent to which the notches extend across the spacing conductors can also be a function of the degree of twist.
For the desired pole-pair number combination p.sub.1 /p.sub.2 always those coils are omitted from the individual phases of the first pole-pair number p.sub.2, which form overlapping phase bands for the second pole-pair number in the coil side star; the remaining coils of each phase for 2p.sub.1 are distributed symmetrically along the periphery and in accordance with ##EQU1## over the base-speed winding connected in three-phase wye/three-phase wye configuration and the dead winding branches N.sub.1, connected in parallel or in series to it, for the first pole-pair number p.sub.1, whereby at least a large portion of the omitted coils is configured as additional dead branches for the second pole-pair number p.sub.2.
A workpiece table assembly is configured to hold a plurality of workpieces (e.g. conductive strands) so that the workpieces can be modified (e.g. bent). In one embodiment, the workpiece table assembly advantageously comprises a table, a saddle, a lift mechanism, and a die. The saddle is advantageously recessed below the table and raised or lowered by the lift mechanism. The table advantageously has a top surface with holes adapted to accept quick-release pins from a step-off board. The step-off board also has notches to accept and position the strands for die pressing. In one exemplary operation, the step-off board is used to stagger the strands over the down-positioned saddle. The saddle is then raised by the lift mechanism and the die placed within the saddle on top of the strands. A force is applied to the die to bend the strands.
In a transposed bar, the partial conductors of which traverse different height levels and are twisted by offsetting from one layer to the next, the partial conductors are disposed next to each other in four layers, and the twisting is carried out so that always two adjacent partial conductors are jointly offset.
