Structure of active type magnetic bearing

Details Structure of active type magnetic bearing Structure of active type magnetic bearing

1987-07-23

1988-12-27

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

F16C 3906

Patent

active

047942908

ABSTRACT:
An active type magnetic bearing for controllably supporting a rotatable shaft made of a magnetic material is constructed such that a stator made of an annular formed laminated iron core is provided around the rotatable shaft, a number of slots are formed along an internal surface of the iron core, stator windings of a number of phases are wound so as to be settled in the slots, thin sheet-like permanent magnets magnetized radially to provide a number of poles are secured onto the internal surface of the annular formed iron core with a predetermined air gap maintained between the permanent magnets and the rotatable shaft, and the stator windings of each phase are so wound that upon energization, a magnetic field thereby produced enhances a magnetic field produced by one of the permanent magnets while it reduces a magnetic field produced by another permanent magnet provided at a position 180.degree. spaced apart from that one of the permanent magnets.

REFERENCES:
patent: 3845997 (1974-11-01), Boden
patent: 4141604 (1979-02-01), Habermann
patent: 4500142 (1985-02-01), Brunet

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