An electric actuator comprises a motor and a plate, wherein the motor has an electric contact in electrical contact with the plate. An intermediate shaft is in contact with the plate. A controller is fixed to an upper part of the actuator. The controller has an electrical output electrically communicating with the electric contact of the motor through the intermediate shaft and the plate.

The present invention provides a motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed outside the rotor; a housing disposed outside the stator; a circuit board disposed on the stator; and a coupling member for coupling the circuit board to the housing. The circuit board includes a first region where a ground pattern is formed, and a second region which is the remainder excluding the first region, wherein the first region has a first hole, and the second region has at least one second hole. The coupling member includes a first screw which is coupled to the housing through one selected from among the first hole and the second hole.

The present invention provides a motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed outside the rotor; a housing disposed outside the stator; a circuit board disposed on the stator; and a coupling member for coupling the circuit board to the housing. The circuit board includes a first region where a ground pattern is formed, and a second region which is the remainder excluding the first region, wherein the first region has a first hole, and the second region has at least one second hole. The coupling member includes a first screw which is coupled to the housing through one selected from among the first hole and the second hole.

An electric motor and an electrical appliance are provided. The electric motor includes a rotating shaft, a stator, a rotor disposed on the rotating shaft, spaced apart from the stator, and embedded in the stator, a first end cover, and a first bearing. The first bearing includes a first outer ring fixed on the first end cover and insulated from at least part of the first end cover, a first inner ring embedded in the first outer ring, and a first ball disposed between the first outer ring and the first inner ring. The rotating shaft is fixed on the first inner ring and rotationally supported on the first end cover. The part of the first end cover that is insulated from the first outer ring is short-circuited with a stator core of the stator and is grounded.

An electrically conductive nonwoven includes: a raw nonwoven having a first electrical conductivity; and electrically conductive particles having a second electrical conductivity. The second electrical conductivity is higher than the first electrical conductivity. In an embodiment, the particles have a proportion by weight of from 30% to 60%. In an embodiment, the particles have a size of from 3 μm to 8 μm.

An electrically conductive nonwoven includes: a raw nonwoven having a first electrical conductivity; and electrically conductive particles having a second electrical conductivity. The second electrical conductivity is higher than the first electrical conductivity. In an embodiment, the particles have a proportion by weight of from 30% to 60%. In an embodiment, the particles have a size of from 3 μm to 8 μm.

An arrangement for producing an electrically conductive connection between a first machine element and a second machine element, comprising an electrically conductive disk which is secured to a supporting body, wherein the disk is provided with a bore for receiving a second machine element, wherein slots are introduced into the disk starting from the peripheral edge of the bore.

A wind turbine including a hub to which the rotor blades are arrangeable, wherein the hub is rotatable around a rotating axis is provided. The wind turbine further includes a generator including a rotor arrangement and a stator arrangement, wherein the rotor arrangement and the stator arrangement are rotatable with respect to each other around the rotational axis. Further the rotor arrangement is coupled to the hub. The wind turbine further includes a grounding system which is fixable to a nacelle of the wind turbine, wherein the grounding system is configured for transferring lightning current between the rotor arrangement and the nacelle and for providing an EMF shielding of the generator, wherein the generator is arranged along the rotational axis of the hub between the hub and the grounding system.

A wind turbine including a hub to which the rotor blades are arrangeable, wherein the hub is rotatable around a rotating axis is provided. The wind turbine further includes a generator including a rotor arrangement and a stator arrangement, wherein the rotor arrangement and the stator arrangement are rotatable with respect to each other around the rotational axis. Further the rotor arrangement is coupled to the hub. The wind turbine further includes a grounding system which is fixable to a nacelle of the wind turbine, wherein the grounding system is configured for transferring lightning current between the rotor arrangement and the nacelle and for providing an EMF shielding of the generator, wherein the generator is arranged along the rotational axis of the hub between the hub and the grounding system.

An electrical drive unit has a housing having a metal pole housing, which accommodates a stator and a rotor, and a separately produced electronic housing which axially adjoins the pole housing and accommodates an electronic unit. At least one contact element is integrated inside the electronic housing and forms, via at least one ground pin, an electrically conductive connection between the electronic housing and the pole housing to establish a ground connection. An open flange and a cylindrical circumferential wall are formed on the pole housing, against which circumferential wall the at least one ground pin radially bears in a resilient manner, and the at least one ground pin has a side surface facing the circumferential wall, wherein a bearing contour is formed on the side surface and bears against the circumferential wall only in an approximately punctiform manner with respect to an axial direction and/or a circumferential direction.