Bearingless rotary machine

Details Bearingless rotary machine Bearingless rotary machine

1998-11-25

2000-06-20

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310179, 310 68C, 318798, H02K 1716, F16C 3204

Patent

active

06078119&

ABSTRACT:
An object of the present invention is to provide a bearingless rotary machine which is capable of stably controlling the levitated position of a rotor of an induction motor even if the rotor comprises a squirrel-cage type rotor that is simple in structure and can easily be manufactured.
A bearingless rotary machine has a rotor having secondary current paths and a stator spaced from the rotor by a gap. The stator has two kinds of windings for imparting a rotating and a levitating and supporting force to the rotor. The rotary machine has a magnetic field command calculator, magnetic flux distribution detecting means and correcting means for adjusting the detected control magnetic flux distribution to coincide with the magnetic field distribution command.

REFERENCES:
patent: 4724373 (1988-02-01), Lipo
patent: 4841204 (1989-06-01), Studer
patent: 5294876 (1994-03-01), Joensson
patent: 5488280 (1996-01-01), Langreck
patent: 5708346 (1998-01-01), Schob
patent: 5770199 (1998-06-01), Eibl et al.
patent: 5880550 (1999-03-01), Fukao et al.
patent: 5936370 (1999-08-01), Fukao et al.
Satoshi Mori et al. "Experiments on a Bearingless Synchronous Reluctance Motor with Load" 5th Int'l. Symposium on Magnetic Bearings, Kanazawa, Japan--Aug. 96.

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