An electrical device including an electrode arrangement having a magnet, and an electrode, an electrically conducting movable device, movable relative to the electrode arrangement and spaced apart from the electrode arrangement, whereby a gap (G) is formed therebetween, and a suspension including a liquid, a plurality of magnetic particles dispersed in the liquid and a plurality of non-magnetic electrically conducting particles dispersed in the liquid, which non-magnetic electrically conducting particles have higher electric conductivity than the magnetic particles, wherein the suspension) extends between the electrically movable device and the electrode arrangement in the gap (G), and wherein the magnet is arranged to provide a magnetic field through the suspension to thereby align the non-magnetic electrically conducting particles between the electrode arrangement and the electrically conducting movable device to obtain an electrical connection between the electrode arrangement and the electrically conducting movable device.

An electrical device including an electrode arrangement having a magnet, and an electrode, an electrically conducting movable device, movable relative to the electrode arrangement and spaced apart from the electrode arrangement, whereby a gap (G) is formed therebetween, and a suspension including a liquid, a plurality of magnetic particles dispersed in the liquid and a plurality of non-magnetic electrically conducting particles dispersed in the liquid, which non-magnetic electrically conducting particles have higher electric conductivity than the magnetic particles, wherein the suspension) extends between the electrically movable device and the electrode arrangement in the gap (G), and wherein the magnet is arranged to provide a magnetic field through the suspension to thereby align the non-magnetic electrically conducting particles between the electrode arrangement and the electrically conducting movable device to obtain an electrical connection between the electrode arrangement and the electrically conducting movable device.

A shunt assembly for a bearing configuration is disclosed herein. The shunt assembly includes a mesh layer that provides electric contact between a first and second conductive component. The mesh layer can be secured against one of the conductive components via application of a preload, which can be achieved by a spring, O-ring, or other element.

A shunt assembly for a bearing configuration is disclosed herein. The shunt assembly includes a mesh layer that provides electric contact between a first and second conductive component. The mesh layer can be secured against one of the conductive components via application of a preload, which can be achieved by a spring, O-ring, or other element.

The present invention is drawn to a sliding contact material for a motor brush, the sliding contact material containing: pure Ag as a matrix; and ZnO particles and Ta.sub.2O.sub.5 particles dispersed in the matrix, wherein the sliding contact material has a ZnO particle content of 0.1% by mass or more and 12% by mass or less and a Ta.sub.2O.sub.5 particle content of 0.1% by mass or more and 6.0% by mass or less. The present inventive sliding contact material is preferable as a constituent material of motor brushes of small DC motors, satisfactory in mechanical wear resistance and spark resistance, and superior in low-noise characteristics. In addition, the present invention is drawn to a sliding contact material that is capable of substituting for AgPd-based alloys, which have become expensive because of the recent increase in palladium price.

The present invention is drawn to a sliding contact material for a motor brush, the sliding contact material containing: pure Ag as a matrix; and ZnO particles and Ta.sub.2O.sub.5 particles dispersed in the matrix, wherein the sliding contact material has a ZnO particle content of 0.1% by mass or more and 12% by mass or less and a Ta.sub.2O.sub.5 particle content of 0.1% by mass or more and 6.0% by mass or less. The present inventive sliding contact material is preferable as a constituent material of motor brushes of small DC motors, satisfactory in mechanical wear resistance and spark resistance, and superior in low-noise characteristics. In addition, the present invention is drawn to a sliding contact material that is capable of substituting for AgPd-based alloys, which have become expensive because of the recent increase in palladium price.

A discharge device for discharging electric currents from a rotor part of a machine having a shaft. The discharge device having an axially displaceable contact element received at least partially in a guide unit and serving to form an electrically conductive sliding contact between a sliding contact surface of the contact element and a shaft contact surface of the shaft, the contact element being connected to the guide unit and/or a retaining element of the machine in an electrically conductive manner and being pre-loaded towards the shaft contact surface by a spring element, the contact element being wetted at least partially by an oily fluid, at least one duct being provided at least in sections of the guide unit and/or of the contact element for the oily fluid, the duct being formed by the guide unit and the contact element.

A discharge device for discharging electric currents from a rotor part of a machine having a shaft. The discharge device having an axially displaceable contact element received at least partially in a guide unit and serving to form an electrically conductive sliding contact between a sliding contact surface of the contact element and a shaft contact surface of the shaft, the contact element being connected to the guide unit and/or a retaining element of the machine in an electrically conductive manner and being pre-loaded towards the shaft contact surface by a spring element, the contact element being wetted at least partially by an oily fluid, at least one duct being provided at least in sections of the guide unit and/or of the contact element for the oily fluid, the duct being formed by the guide unit and the contact element.

A first line, which extends through a circumferential center of a tooth, and a second line, which extends through a circumferential center of an undercut between two segments adjacent to the tooth, intersect at an angle C. A third line, which extends through a magnetic-flux-free region of a magnet, and a fourth line, which extends through a circumferential center of a power supply brush, intersect at an angle D. The third line and a fifth line, which extends through a circumferential center of one of magnetic poles of the magnet, intersect at an angle E. A reference line of a stator and a sixth line, which extends through a reference point of a brush holder, intersect at an angle F. A shift angle S, which is obtained by C+DE+F, is set such that a phase difference between an armature torque and a cogging torque is 18080.

A first line, which extends through a circumferential center of a tooth, and a second line, which extends through a circumferential center of an undercut between two segments adjacent to the tooth, intersect at an angle C. A third line, which extends through a magnetic-flux-free region of a magnet, and a fourth line, which extends through a circumferential center of a power supply brush, intersect at an angle D. The third line and a fifth line, which extends through a circumferential center of one of magnetic poles of the magnet, intersect at an angle E. A reference line of a stator and a sixth line, which extends through a reference point of a brush holder, intersect at an angle F. A shift angle S, which is obtained by C+DE+F, is set such that a phase difference between an armature torque and a cogging torque is 18080.