Abstract: The invention relates to a brush module (10) for an electric machine and to a method for mounting such a brush module, the brush module having a brush (13) for forming an electric contact with a slip ring, the brush module having an mounting device (12) and a brush holder (11) for accommodating and holding the brush, the mounting device being realized as a U-shaped sheet-metal bracket (17) which engages over the brush holder, the sheet-metal bracket having laterally protruding fastening tabs (18) for fastening the brush holder to an mounting surface (19), an access opening (25) being formed in the brush holder, a retaining tab, which is formed on a fastening tab of the sheet-metal bracket, engaging in the access opening and holding the brush in the brush holder in a retaining position (24) in a form-fitting manner, the fastening tab having the retaining tab being inclined at an angle ? relative to the mounting surface of the brush holder.

Abstract: A discharge device for discharging electric currents in a machine from a rotor part to a stator part, the rotor part in particular having a shaft, the discharge device comprising a contact element and a spring being connectable to the stator part in an electrically conductive manner, the contact element made predominantly of carbon, the contact element pressurized with a contact force by the spring for realizing an electrically conductive sliding contact between a sliding contact surface of the contact element and an axial shaft contact surface of the shaft. The contact element is circular, the sliding contact surface being at least annular in shape and disposed coaxially in relation to the shaft contact surface, the spring includes a circular support section which at least in part coaxially envelops the shaft of the machine, the support section being configured for radially abutting against an abutment surface of the stator part.

Abstract: The invention relates to a contact unit and to a method for steering electric arcs on a contact unit, in particular for supplying vehicles with power via an overhead wire (20), the contact unit comprising a sliding contact device (19), the sliding contact device having a contact strip support (21) and a contact strip (22) disposed thereon, the contact unit having a steering device (24) for electric arcs (25) which is disposed on the contact unit, the steering device being provided with a magnet (30).

Abstract: The invention relates to a brush module (10) for a rotating electric machine, in particular for a current-excited synchronous machine, the brush module (10) having at least two brushes (12) for establishing electrical contact with slip rings (11) of the machine, the brush module (10) having a housing device (13) and brush holders (14) for accommodating and supporting the brushes (12), wherein the housing device (13) has a collecting device (21) for collecting brush dust of the brushes (12). Alternatively, the housing device (13) is configured in such a manner that the brush holders (14) are spaced apart from each other, the housing device (13) at least partially forming an air gap between the brush holders (14) on a housing portion of the housing device (13) that faces slip rings (11).

Abstract: A discharge device for discharging electric currents from a rotor part of a machine, in particular a rotor part with a shaft, into a stator part, the discharge device having a contact element, a support and a spring mechanism, the support being connectable to a stator part in an electrically conductive manner, the contact element being predominantly made of carbon, the contact element being accommodated on the support in an axially movable manner and connected to it in an electrically conductive manner, a contact force applicable to the contact element by the spring mechanism so as to establish an electrically conductive sliding contact between a sliding contact surface of the contact element to establish the sliding contact, and an axial shaft contact surface of the shaft, wherein the contact element is disk-shaped, the sliding contact surface being at least annular and disposable coaxially relative to the shaft contact surface.

Abstract: A discharging device for discharging electrical interference, in particular currents, from a rotor part of a machine, said rotor part in particular being a shaft, into a stator part (17) of the machine, the discharging device having a contact device (11) comprising a contact element (13) which is accommodated in an axially displaceable manner in a guide and which is acted on by a contact force device (15) for generating a shaft contact force (FW) in order to establish electrical contact between a shaft contact surface (19) of the contact element (13) and a rotor contact surface (20) of the shaft (18), wherein the guide has a stator contact surface (25) for forming an electrical connection with the stator part (17) and the discharging device has a guide contact force device (21) for generating a guide contact force (FF) between a guide contact surface (24) of the contact element (13) and the stator contact surface (25) electrically connected to the stator part (17).

Abstract: The invention relates to a method for producing a latent heat accumulator of expanded graphite by expanding a graphitic starting material. The invention is characterized in that the graphitic starting material is introduced into a mold which corresponds at least in sections to the negative mold of the latent heat accumulator, and that the graphitic starting material is subsequently expanded in the closed mold.