Otto Bock Healthcare Products Gmbh

U.S. Philips Corporation

Josef Inschlag

Roland Auberger

Marcus Eder

Richard Sedlak

Wolfang Wagner

Martin Washüttl

Martin Weber

A method for operating an electric motor when at a rotational speed below or above a predetermined limit value. The method involves operating an electric motor that has a stator and a rotor, wherein the stator or the rotor has at least three segments each having at least one electromagnetic element. The method includes simultaneously de-energizing all electromagnetic elements of all segments while the rotor rotates, measuring an electrical quantity induced in the electromagnetic elements, in particular an induced voltage, for each segment, and determining a rotor position of the rotor in relation to the stator from the measured electrical quantities. An electrical current can be supplied to the electromagnetic elements such that a segment magnetic field is formed to provide a segment torque to the rotor. The intensity of the electrical current depends on a segment position of the rotor in relation to the segment.

Method for operating an electric motor

The invention relates to an adjusting device for a prosthetic device, having a drive () for adjusting at least one first component of the prosthetic device relative to a second component, wherein the drive () is designed as a permanent magnet electric motor and comprises a stator () having exciter coils () and a rotor () having at least one permanent magnet is an armature magnet (). At least one holding magnet () in the form of a permanent magnet is arranged on the stator () to form a cogging torque for the rotor ().

Adjusting device and method for operating an adjusting device

The invention relates to a potentiometer comprising (a) at least two electrically conducting segments (), each of which has a contact end () that is bordered by a circumferential edge () and which adjoin each other in a flush manner by means of one respective section () of the edges () thereof, and (b) a connecting device () for electrically connecting a first contact point (P) in a first segment to at least one second contact point (P, P) in a second segment that is different from the first segment.

Potentiometer

In an arrangement (1) for the segment-by-segment recording of information signals by at least one rotationally drivable magnetic head (4, 5) in inclined recording tracks (2) on a magnetic tape (3) which can be driven intermittently by a tape drive device (53) while the recording mode is active, the stationary magnetic tape (3) is scanned along an inclined reproducing track (75) which partly overlaps the inclined recording track last scanned (2.sub.n) and the information signal segment (field signal) recorded in the inclined recording track (2.sub.n) is then reproduced. The arrangement includes structure for determining the instantaneous relative position of the inclined reproducing track (75), in the longitudinal direction of the tape, with respect to the inclined recording track (2.sub.n), which is partly overlapped by the inclined reproducing track (75), and for generating position information (LI). The arrangement also includes structure for controlling, in dependence upon this position information (LI), the tape drive device (53) during a subsequent recording cycle.

Arrangement for segment-by-segment recording of information signals on

A recording and/or reproducing apparatus (1) comprises a record carrier holder (8) into which a record carrier (7) can be loaded in a loading position of the record carrier holder (8) and which is movable by hand from its loading position into a switching position. A drive motor (9) is coupled to the record carrier holder (8) via a drive transmission (10) to move the record carrier holder (8) from its switching position into an operating position. The drive motor (9) supplies at least one generator pulse (GI) when the record carrier holder (8) is moved by hand from its loading position into its switching position, which generator pulse can be detected by a comparator device (17), which in response thereto supplies activation information (AI) to a mode activation stage (20). The mode activation stage (20) is adapted to activate an active mode upon the occurrence of activation information (AI) while the recording and/or reproducing apparatus (1) is in the power saving mode.

Growing community of inventors

Str. Lorenz am Wechsel, Austria

Josef Inschlag