Siemens Aktiengesellschaft

Med-el Elektromedizinische Geraete Gmbh

Ebm-papst Mulfingen Gmbh & Co Kg

Magna Auteca Gmbh

Nke Austria Gmbh

Fersa Innova Slu

Günther Weidenholzer

Peter Hamberger

Thomas Lechleitner

Markus Nagl

Ralf Kobler

Gerald Jungmayr

Edmund Marth

David Haider

Klaus Grissenberger

Thomas Witzler

Matthias Holzer

Guido Feizlmair

Kevin Kaspar

Sergio Santo Domingo

The invention relates to an electrical machine, in particular an electric drive unit comprising an electric motor and a magnetic gear. In accordance with one embodiment the electrical machine has the following: a housing, a first shaft arranged in the housing, by means of which first shaft a first permanent magnet assembly and a second permanent magnet assembly are rigidly connected, and a stator arranged internally on the housing, which stator together with the first shaft forms the electric motor. The electrical machine also has a tubular machine element with a plurality of ferromagnetic pole shoes, into which the first shaft is at least partially inserted, such that the first shaft is situated coaxially with the tubular machine element and the second permanent magnet assembly is situated within the tubular machine element. The first shaft is mounted at a first end on the tubular machine element by means of a first bearing inside the tubular machine element. An annular third permanent magnet assembly is arranged around the tubular machine element so that the second permanent magnet assembly, the tubular machine element and the third permanent magnet assembly form the magnet gear. Either the tubular machine element is mounted rotatably on the housing and the annular third permanent magnet assembly is rigidly connected to the housing, or the tubular machine element is rigidly connected to the housing and the annular third permanent magnet assembly is mounted rotatably on the housing.

Electrical machine with electric motor and magnetic gear

An external component for a bone conduction hearing implant is described. An external housing contains an electromagnetic drive coil, a coil core, and at least one spacer container located adjacent to one of the longitudinal ends of the coil core and configured to hold an optional removable spacer piece. The coil core and any pole pieces and side pieces are configured to magnetically interact with an implant magnet in the bone conduction transducer in the absence of electrical current in the drive coil to hold the external housing in the fixed attachment on the skin of the hearing implant patient over the bone conduction transducer. And electrical current in the drive coil magnetically interacts with the coil core and any pole pieces and side pieces to generate the implant communication signals to the implant magnet to create a mechanical vibration signal in the bone conduction transducer for perception by the patient as sound.

Bone conduction transducer system with adjustable retention force

A circuit arrangement for reducing unidirectional flux component in a transformer core includes a compensation winding magnetically coupled to the transformer core, a transductor series connected with the compensation winding in a compensation current path, wherein the compensation current path has two parallel branches each containing a power winding of the transductor and an uncontrolled valve connected in series, where flow directions of the valves run counter to one another, and where each power winding is magnetically coupled to a control winding via a saturable transductor core, and includes a controller to which a detector supplies magnitude and direction information of the unidirectional flux component, and which generates a control variable supplied to each control winding such that the saturation state of the transductor core is variable such that a compensation current is formed in the compensation current path that counteracts the unidirectional flux component in the transformer core.

Circuit arrangement for reducing a unidirectional flux component in the soft-magnetic core of a transformer

Growing community of inventors

Sarleinsbach, Austria

Günther Weidenholzer