Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 saturatable 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.

Abstract: An arrangement is described for a hearing implant system. An implantable housing has an outer surface configured to lie under and parallel to the skin of the implanted patient. An implant magnet arrangement is located within the implantable housing and has multiple local magnetic sections with different independent local magnetic fields that are combined together to form a net magnetic field with at least two-fold symmetry and zero net magnetic dipole moment, wherein the magnetic fields are oriented parallel to the outer surface of the implant housing.

Abstract: 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.

Abstract: An implantable hearing prosthesis for a recipient patient is described. An implantable signal transducer includes one or more electromagnetic drive coils for receiving an electrical stimulation signal and a cylindrical transducer magnet arrangement including an inner disk magnet having a first magnetic field direction, and an outer annular magnet surrounding the inner rod magnet and having a second magnetic field direction opposite to the first magnetic field direction. Current flow through the one or more electromagnetic drive coils from the electrical stimulation signal creates a coil magnetic field that interacts with the magnetic fields of the transducer magnet arrangement to create vibration in the transducer magnet which is developed by the signal transducer as a mechanical stimulation signal for audio perception by the patient.

Abstract: An implantable hearing prosthesis for a recipient patient is described. An implantable receiving coil transcutaneously receives an externally generated communication data signal. An implantable signal processor is in communication with the receiving coil and converts the communication data signal into an electrical stimulation signal. An implantable transducer housing is fixedly attachable to skull bone of the patient. An implantable drive transducer is in communication with the signal processor and removably engageable with the transducer housing for applying to the transducer housing a mechanical vibration signal based on the electrical stimulation signal for audio perception by the patient.

Abstract: An arrangement is described for a hearing implant system. An implantable housing has an outer surface configured to lie under and parallel to the skin of the implanted patient. An implant magnet arrangement is located within the implantable housing and has multiple local magnetic sections with different independent local magnetic fields that are combined together to form a net magnetic field with at least two-fold symmetry and zero net magnetic dipole moment, wherein the magnetic fields are oriented parallel to the outer surface of the implant housing.

Abstract: An implantable hearing prosthesis for a recipient patient is described. An implantable signal transducer includes one or more electromagnetic drive coils for receiving an electrical stimulation signal and a cylindrical transducer magnet arrangement including an inner disk magnet having a first magnetic field direction, and an outer annular magnet surrounding the inner rod magnet and having a second magnetic field direction opposite to the first magnetic field direction. Current flow through the one or more electromagnetic drive coils from the electrical stimulation signal creates a coil magnetic field that interacts with the magnetic fields of the transducer magnet arrangement to create vibration in the transducer magnet which is developed by the signal transducer as a mechanical stimulation signal for audio perception by the patient.

Abstract: A magnet arrangement is described for use in implantable devices. An implantable housing contains a portion of an implantable electronic system. An implant magnet arrangement within the housing has adjacent magnetic sections that lie substantially in a common plane and include an inner center disc having an inner magnetic orientation in an inner magnetic direction, and an outer radial ring having an outer magnetic orientation in an outer magnetic direction opposite to the inner magnetic direction.

Abstract: A magnet arrangement is described for use with hearing implant systems. An external device for use with an implant system has an external device housing that contains external elements of a hearing implant system. A cylindrical external magnet arrangement within the housing has multiple magnetic sections lying in a common plane, including an inner center disc having an inner magnetic orientation in an inner magnetic direction, and an outer radial ring having an outer magnetic orientation in an outer magnetic direction opposite to the inner magnetic direction.

Abstract: An implantable hearing prosthesis for a recipient patient is described. An implantable receiving coil transcutaneously receives an externally generated communication data signal. An implantable signal processor is in communication with the receiving coil and converts the communication data signal into an electrical stimulation signal. An implantable transducer housing is fixedly attachable to skull bone of the patient. An implantable drive transducer is in communication with the signal processor and removably engageable with the transducer housing for applying to the transducer housing a mechanical vibration signal based on the electrical stimulation signal for audio perception by the patient.