Permanent magnet flux-biased magnetic actuator with flux feedbac

Details Permanent magnet flux-biased magnetic actuator with flux feedbac Permanent magnet flux-biased magnetic actuator with flux feedbac

1989-09-11

1991-03-26

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 709

Patent

active

050032119

ABSTRACT:
The invention is a permanent magnet flux-biased magnetic actuator with flux feedback for adjustably suspending an element on a single axis. The magnetic actuator includes a pair of opposing electromagnets 11' and 12' providing bi-directional forces along the single axis to the suspended element. Permanent magnets in flux feedback loops from the opposing electromagnets establish a reference permanent magnet flux-bias to linearize the force characteristics of the electromagnets to extend the linear range of the actuator without the need for continuous bias currents in said electromagnets.

REFERENCES:
patent: 4629262 (1986-12-01), Hamilton
patent: 4634191 (1987-01-01), Studer
patent: 4642500 (1987-02-01), Higuchi
patent: 4642501 (1987-02-01), Kral et al.
NASA Conference Publication 2346, Groom, Nelson Jr., "Overview of Magnetic Bearing Control and Linearization Approaches for Annular Magnetically Suspended Devices" (1984); 2/7-9/1984.

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