ROTARY MACHINE WITHOUT BEARING

Japanese Patent JP3667069

B2

PROBLEM TO BE SOLVED: To provide a rotary machine without a bearing capable of stably controlling a floating position, even in, for example, an induction machine using basket-type rotor that has simple structure and can be manufactured easily.
SOLUTION: In a rotary machine without a bearing, the control magnetic field on n-poles (m±2) is superposed, while being synchronized to the drive magnetic field of an m-pole which is rotated, rotary force is applied to a rotor R, and at the same time, the control magnetic field of the n-poles in increased or decreased according to the displacement of the rotor R detected by displacement detection means 11x and 11y of the rotor R for magnetically levitating the rotor R. Also a back electromotive voltage which is induced to the terminal voltage of the coil winding of a stator S is integrated, flux distribution in the void of the rotor r and the stator S is detected, and the deformation in the flux distribution caused by the induced current of the rotor R is corrected, thus adjusting a control magnetic field so that an original flux distribution command value can be set.

JPS56150620	VERTICAL SHAFT ROTARY ELECTRIC MACHINE
JP2002081444	MAGNETIC BEARING DEVICE, AND METHOD FOR ADJUSTING SENSOR SENSITIVITY OF MAGNETIC BEARING DEVICE
WO/2020/125104	COMBINED SENSOR STRUCTURE FOR MAGNETIC BEARING

Chu Sato
Osawa
Satoshi Mori

JP36711197A

July 06, 2005

December 25, 1997

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Ebara Corporation

F16C32/04; H02P27/06; (IPC1-7): H02P5/41; F16C32/04

JP6133493A
JP8294248A

Isamu Watanabe
Shintaro Hotta
Susumu Ohata

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