Electrodynamic actuator

Details Electrodynamic actuator Electrodynamic actuator

2006-04-18

2006-04-18

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Linear

Reexamination Certificate

active

07030519

ABSTRACT:
An electrodynamic actuator has a permanently magnetic stationary part that forms an air-core with a magnetic field, and an armature with a coil arranged in the air-core. The armature moves in the magnetic field in the air-core dependent on a drive current fed to the coil. An increased accuracy is achieved by the provision of damping in relation to the speed of the armature, by arranging a sensing winding on the armature and connecting a calculation unit to the sensing winding. The calculation unit determines the speed of the armature from an induced voltage in the sensing winding caused by a movement of the armature in the magnetic field.

REFERENCES:
patent: 4569072 (1986-02-01), van Roermund
patent: 4690371 (1987-09-01), Bosley et al.
patent: 5197104 (1993-03-01), Padi
patent: 5353174 (1994-10-01), Uno
patent: 5600237 (1997-02-01), Nippert
patent: 5783924 (1998-07-01), Kahlman
patent: 5942892 (1999-08-01), Li
patent: 6111741 (2000-08-01), Schmitz et al.
patent: WO 95/31241 (1995-11-01), None
patent: WO 00/52715 (2000-09-01), None

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