An inductive position sensor, having a first stator element that comprises a first excitation coil, to which a periodic alternating voltage is applied, and also comprises a first receiving system, wherein the signal from the first excitation coil couples inductively into the first receiving system. A first rotor element influence the strength of the inductive coupling between the first excitation coil and the first receiving system as a function of its angular position relative to the first stator element. A metal element and the first rotor element are arranged on a shaft in a rotationally fixed manner. An evaluation circuit determines the angular position of the first rotor element relative to the first stator element from the voltage signals induced in the first receiving system. The first rotor element and the metal element are each designed as a conductor loop with a periodic geometry.

A direct current (DC) brushless fan and a drive apparatus are provided. The drive apparatus includes a housing, a DC brushless motor, a control unit, an adaptation unit, an alternating current (AC) input interface, a DC input interface, and a power storage. The housing includes a first portion and a second portion. A projection path defined by orthogonally projecting the first portion toward the second portion is defined as an installation range. The DC input interface is arranged in the installation range and is electrically connected to the control unit. The AC input interface is arranged in the installation range and is electrically connected to the adaptation unit. The power storage is detachably arranged at an installation position of the housing. When the power storage is arranged at the installation position, the power storage covers the AC input interface and is electrically connected to the DC input interface.

A motor includes a rotor, a stator, a bearing, a motor housing, a bearing holder, a bus bar assembly, and a circuit board. The bearing holder includes a holder protrusion protruding radially outward of the motor housing. A bus bar cover is attached to the lower surface of the holder protrusion. The bus bar cover covers the terminal through hole axially penetrating the holder protrusion. The bus bar cover includes a cover portion and a flange portion. The cover portion covers the lower end portions of the bus bar terminal and the circuit terminal, and is tubular with an open upper surface. The flange portion extends outward from the upper end peripheral edge portion of the cover portion and is fixed to the lower surface of the holder protrusion. The flange portion includes an annular flange projection protruding upward from the upper surface.

A motor includes a rotor, a stator, a bearing, a motor housing, a bearing holder, a bus bar assembly, and a circuit board. The bearing holder includes a holder protrusion and a bus bar cover. The bus bar cover is located on a lower surface of the holder protrusion and covers a terminal through hole penetrating the holder protrusion in an axial direction. The bus bar cover includes a cover portion. The cover portion covers lower end portions of a bus bar terminal and a circuit terminal, is tubular, and includes an open upper surface. The cover portion is closer to the motor housing than a tangent line that connects a protruding direction outer end of a lower end of the holder protrusion and a lower end of the motor housing.

A power generation system for an artificial lift system includes an electrical generator configured to output electrical power in response to rotation of a rotor of the electrical generator. The power generation system also includes a polish rod engagement wheel non-rotatably coupled to the rotor of the electrical generator. The polish rod engagement wheel is configured to engage a polish rod of the artificial lift system and to be driven to rotate in response to linear movement of the polish rod.

Example brush holder assemblies of an electric machine are disclosed. An example brush holder assembly of an electric machine includes a carbon brush including an upper surface and a lower surface opposite the upper surface. The brush holder assembly also includes one or more lead wires extending out of the carbon brush at an insertion point on the upper surface and a first cavity extending into the carbon brush from the upper surface at a location spaced away from the insertion point of the one or more lead wires and unobstructed by the one or more lead wires.

Embodiments of the present systems and apparatus may provide vehicle armor materials and systems that generate electricity from impact and blast energy. For example, in an embodiment, a protective apparatus may comprise a layer of armor and a layer comprising a plurality of electrical generating devices abutting the layer of armor and configured so that energy applied to the layer of armor is transferred to the plurality of electrical generating devices causing the plurality of electrical generating device to generate electrical energy.

A method for manufacturing a rotor for an electric machine with a contactless power transmission system, wherein an end winding cover is arranged on one end face of a laminated core of the rotor. The invention provides that a secondary unit (SEC) of the power transmission system is integrated in the end winding cover and, as a result, after the end winding cover has been arranged, the secondary unit (SEC) is held on the rotor indirectly via the end winding cover.

In one aspect of a motor of the present invention, an inverter housing portion is located on the radially outer side of a stator housing portion. A housing has a tubular circumferential wall surrounding the rotor and the stator on the radially outer side of the rotor and the stator, and is a single member. The circumferential wall has a first cooling flow path, and a partition wall that partitions the stator housing portion and the inverter housing portion. The first cooling flow path extends in the circumferential direction, and at least a part of the first cooling flow path is provided in the partition wall. As viewed along the predetermined direction, a portion of the first cooling flow path provided in the partition wall has a portion overlapping the inverter and a portion overlapping the capacitor.

Proposed are renewable power generating systems driven by wind or wheel power such as train vehicle power generating systems, which are easily installed on train vehicles of trains, and which generate power without additional carbon emissions to avoid environmental pollution. One or more generator holders to hold one or more generators are installable on a train vehicle chassis. A generator wheel may be configured to touch a rail and may rotate in any direction along the rail. A generator axle may couple one or more generators to the generator wheel. The one or more generators may generate electrical power and produce zero carbon emissions while the generator wheel rotate on the rail. One or more wind turbines may also be coupled to the generator axle to supply power to the one or more generators so that the one or more generators produce zero carbon emissions while the train vehicle is moving.