Method of constructing models of rotary electrical machines to p

Details Method of constructing models of rotary electrical machines to p Method of constructing models of rotary electrical machines to p

1978-11-14

1981-11-10

Smith, Jr., David

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Motors electrically connected in cascade or tandem

318 45, 318161, 324158MG, 73116, H02K 1500

Patent

active

043000789

ABSTRACT:
The method makes possible experimentation on reduced scale models, more especially in non-stationary operating conditions, of the rotor of rotary electrical machines respecting the physical conditions which ensure in the rotor under test a simultaneous similitude for the electromagnetic, thermal and mechanical phenomena. The contradiction which appears in the reduction of the electromagnetic forces and of the inertial forces is removed by modifying the stator of the reduced scale model so as to produce in the rotor a correct evolution of the rotor frequencies. The method is useful for testing rotors of very high power electrical machines.

REFERENCES:
patent: 2885625 (1959-05-01), Pittman, Jr.
patent: 3052117 (1962-09-01), Miller et al.
patent: 3705352 (1972-12-01), Restivo
Sudan et al., "The Measurement of Transient Torque and Load Anole in Model Synchronous Machines", Inst. Elec. Eng., Feb. 1960, pp. 51-60.
Mehta et al., "Transient Torque and Load Angle of a Synchronus Generator Following Several Types of System Disturbance", IEE Processing, 2-60, pp. 61-74, (G. Britian).
Chrisofides et al., "Determination of Load Losses and Torques in Squirrel-Cage Induction Motors", Proc. IEE, vol. 113, No. 12, 12-66, pp. 1995-2004.
Malik et al., "Study of Asynchronous Operation and Resynchronisation Synchronus Machines by Mathematical Models", Proc. IEE, vol. 113, No. 12, 12-66, (G. Britain).

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