Rotary electrical machines

Details Rotary electrical machines Rotary electrical machines

1988-12-08

1990-01-16

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310 89, 310216, 310254, 29596, H02K 504, H02K 1502

Patent

active

048945730

ABSTRACT:
A large scale horizontal axis rotary electrical machine has a stator with a laminated annular core resting upon an open-topped support structure. At one position along its length the core is axially fixed to the support structure but is otherwise free to move axially on the structure to accommodate differential thermal movements. Clamping means for the core laminations incorporate springs the allow the core to expand axially. The stator windings are axially slidable in slots in the laminated core and are held by respective winding end supports spaced from the ends of the core, whereby differential thermal expansion is accommodated between the core and the windings. By adoption of the open-topped support structure, assembly of the core can be accelerated by lowering individual lamination stampings or pre-assembled biscuits of such stampings onto the structure while the structure remains in a horizontal position.

REFERENCES:
patent: 4082974 (1978-04-01), Yamamoto et al.
patent: 4227109 (1980-10-01), Mulach
patent: 4290291 (1981-09-01), Burns
patent: 4587722 (1986-05-01), Miller
H. Hasse et al., "Air-Cooled Turbogenerators In The 200 MVA Power Class", Brown Boveri Review, 3-86, pp. 133-138. vol. 73 #3 Mar. 1986.
B. A. Marlow, "The Mechanical Design of Large Generators", Proceedings of the Institute of Mechanical Engineers, Nov. 1986, vol. 200, No. 135, pp. 1-9.

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