AC motor system

Details AC motor system AC motor system

1992-07-17

1994-04-26

Peckman, Kristine L.

Electrical generator or motor structure

Dynamoelectric

Rotary

318771, H02K 900, H02P 126

Patent

active

053069722

ABSTRACT:
An alternating current (AC) motor system includes an AC motor having a rotor and a stator with the rotor having a plurality of air passes for passing cooling air and the stator having end windings extending from each end. An air deflector is coupled to one end of the rotor and has a generally curved configuration for directing cooling air exiting the air passages into a generally radial flow direction and onto the stator end windings. The stator end windings comprise turns of a plurality of electrical conductors forming the stator winding circuits which are wound to form a plurality of phase windings. Controllable switches are connected to the winding circuits for coupling the phase windings into either a parallel or series circuit arrangement. The system is responsive to motor speed and operating state for selectively switching the windings between the series and parallel electrical circuit arrangements. Resistors are coupled in series electrical circuit with each of the electrical phase windings and controllable switches are coupled in parallel with the resistors for selectively bypassing phase current around the resistors.

REFERENCES:
patent: 2200126 (1940-05-01), Smith
patent: 4409502 (1983-10-01), McCabria
patent: 5068559 (1991-11-01), Satake et al.

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