Abstract: Methods and systems for cooling an electric motor are provided. An electric motor system, in one example, comprises a rotor with a plurality of axial air conduits, a first balancing plate positioned on a first axial side of the rotor, the first balancing plate comprising an inlet air duct and an outlet air duct, and a second balancing plate positioned on a second axial side of the rotor, the second balancing plate comprising an inlet air duct and an outlet air duct. In the electric motor system, the inlet air duct in the first balancing plate is radially offset from the inlet air duct in the second balancing plate.

Abstract: A plant protein-based triboelectric nanogenerator (TENG), and a fabrication method and use thereof are provided. The TENG includes a triboelectric negative layer and a protein film, where the protein film and the triboelectric negative layer are stacked surface-to-surface; and an electrode is adhered to or plated on a back surface of each of the protein film and the triboelectric negative layer, or only a back surface of either of the protein film and the triboelectric negative layer is provided with a grounded electrode. A protein powder is dissolved in water or an ethanol aqueous solution, then a plasticizing agent is added, and the protein is denatured through thermal treatment to obtain an extended structure required for film formation; and the solvent is evaporated, and a resulting product is dried to obtain the protein film with uniform texture and excellent transparency and flexibility. The TENG is used in crop growth.

Abstract: An electromagnetic actuating device (10) has an energizable stationary spool element (1) having a stationary core area (2), an anchor unit (3) moveable relative to the spool elements (1) and the core area (2) and has permanent magnet elements (4) and a pestle (5) disposed on one end and having a free end section (5a) for engaging in an actuating partner, the anchor unit (3) being moveable along a longitudinal movement axis (L) in at least two actuating positions (A,B), and the actuator (10) having retaining elements (7) which are spaced apart from the core area, are permanent-magnetically flux-conductive and are formed in such a manner in a third actuating position (C) between the first and second actuating positions (A,B) for interacting with the permanent magnet elements (4) of the anchor unit (3) that the anchor unit is retained in a third actuating position (C) between the first and second actuating positions (A,B) and/or exerts a predefined force potential towards the actuating partner.

Abstract: In an embodiment a switching device includes at least one stationary contact, a movable contact, an armature, a first permanent magnet, a second permanent magnet and a magnetic switch, wherein the movable contact is movable by the armature, wherein the first permanent magnet is attached to the armature, and wherein the second permanent magnet is arranged in a fixed position relative to the magnetic switch.

Abstract: A switching system for switching an electrical device, comprising: a vacuum interrupter including a fixed electrode, and a mobile electrode, the mobile electrode configured to move between a closed position and an open position. The switching system further comprising an elastic return means configured to apply a driving force to the mobile electrode, and a retaining member for retaining the elastic return means, the retaining member configured to move from a retention configuration, in which the elastic return means is immobilized, into a movement configuration, in which the elastic return means is released. The switching system is configured so that the mobile electrode moves from the closed position to the open position under the action of the elastic return means when the retaining member leaves its retention configuration.

Abstract: A solenoid is provided. The solenoid includes a housing, a pole piece, an end plate formed with or coupled to the housing, a wire coil arranged within the housing, a permanent magnet arranged between the pole piece and the end plate, an armature configured to selectively move between a first position and a second position in response to a current applied to the wire coil, and a spring configured to bias the armature. When the wire coil is de-energized, the armature is maintained in at least one of the first position and the second position. The first position is configured to be maintained by the spring and the second position is configured to be maintained by magnetic attraction between the armature and the permanent magnet through engagement between the armature and the pole piece.

Abstract: An exciter comprises a stator armature defining a plurality of circumferentially spaced apart winding slots separated by respective stator teeth. first exciter winding with multiple phases, a second exciter winding with multiple phases. The individual windings of the first and second exciter windings are seated in the winding slots. For each phase of each of the first and second exciter windings there are two leads configured to connect to a generator control unit (GCU).

Abstract: A control system is designed to control an interrupter. The interrupter is started by a startup current to interrupt a main electric circuit. The startup current flows through an auxiliary electric circuit and has a current valve equal to or greater than a predetermined value. The control system includes a driving unit and a driven unit. The driving unit includes an intermediate electrical path to be connected to the main electric circuit. The driven unit is to be connected to the auxiliary electric circuit. When an abnormal current having a current value equal to or greater than a prescribed value flows through the intermediate electrical path, the driving unit uses, as a drive source for driving the driven unit, the abnormal current flowing through the intermediate electrical path. The driven unit supplies the auxiliary electric circuit with the startup current by being driven by the driving unit.

Abstract: Various embodiments of balanced armature receivers are disclosed, where the receiver includes a yoke which retains permanent magnets, a coil assembly having a coil tunnel, and an armature coupled to the yoke, with a movable portion extending through the coil tunnel and an end portion that is free to deflect between the magnets when an excitation signal is applied to the coil assembly. There are a stationary protrusion which extends from the stationary portion of the receiver toward the movable portion of the armature, and a movable protrusion which extends from the movable portion of the armature toward the stationary portion of the receiver. The stationary and movable protrusions are offset laterally.

Abstract: A powered catheter and/or powered catheter system is described. The catheter includes a catheter hub with one set of contact components that are configured to connect to a mating cable with a corresponding second set of contact components. The mating cable can be part of another device, such as a controller or power source.

Abstract: A movable-side magnet is provided to a movable portion in a vacuum chamber. A drive unit is provided outside the vacuum chamber, and drives the movable portion by exerting magnetic force on the movable-side magnet. The drive unit has a first magnet, a second magnet, and a moving mechanism (moving member). The first magnet exerts magnetic force of attracting the movable-side magnet. The second magnet is provided to be adjacent to the first magnet, and exerts magnetic force of repelling the movable-side magnet. The moving mechanism integrally moves the first magnet and the second magnet.

Abstract: An actuator comprises a support body including a coil having a winding part and a lead part, a coil holder and a board supported by the coil holder, a movable body having a magnet, and a magnetic drive mechanism structured to relatively move the support body and the movable body. The coil holder has a coil holding part holding the winding part and a board support part supporting the board. A board surface of the board is provided with a land with which the lead part is connected. The board support part has a recessed part at a position overlapping with the board when viewed in a direction along the board surface, and the lead part is extended from the winding part to the land via the recessed part and is provided with a resiliently bent portion which is resiliently bent in an inside of the recessed part.

Abstract: Disclosed is a hermetic AC electric motor that includes harmonics shunting such that high frequency harmonics are shunted from the AC electric motor without the use of one or more high frequency filters in the associated motor drive. A related method of operating an AC electric motor includes shunting high frequency harmonics to a fluid passing through the AC electric motor. Also disclosed is a simplified variable speed motor drive system which eliminates the need for a filter for removing high frequency harmonics.

Abstract: An actuator includes a support body, a movable body, a connection body, and a magnetic drive mechanism having a coil and a magnet for relatively moving the support body and the movable body. A winding part of the coil includes effective side portions, a first curved side portion connecting one side ends of the effective side portions, and a second curved side portion connecting the other side ends of the effective side portions. The magnet faces the effective side portions of the coil. A yoke fixed to the magnet includes a first yoke, a second yoke, a one side connection yoke and the other side connection yoke connecting the first yoke with the second yoke, and the one side connection yoke and the other side connection yoke are provided at positions so as not to overlap with the effective side portions and the magnet.

Abstract: A switch includes: a first stationary contact having a first stationary contact point; a second stationary contact having a second stationary contact point; a movable contact having a first movable contact, and a second movable contact point; a first magnet pair defined by magnets having surfaces facing each other, the magnets of the first magnet pair being disposed with the first stationary contact point and the first movable contact point therebetween in such a manner that the magnets of the first magnet pair become farther from each other outwardly; and a second magnet pair defined by magnets having surfaces facing each other, the magnets of the second magnet pair being disposed with the second stationary contact point and the second movable contact point therebetween in such a manner that the magnets of the second magnet pair become farther from each other outwardly.

Abstract: A MEMS device that includes a substrate including an element and a connection wiring electrically connected to the element, and a connection portion electrically connected to the connection wiring. The connection portion is formed of a eutectic alloy of a first metal and a second metal. A line width of the connection wiring is smaller than a width of the connection portion when a main surface of the substrate is viewed in a plan view.

Abstract: A magnetic switching arrangement including a first contact, a second contact, at least one of the first and second contacts including a magnetically responsive material, a biaser operably connected to one of the first and second contacts and biasing the one of the first and second contact into electrical connection with the other of the first and second contacts such that a closed circuit is achieved in the absence of an external force preventing closure of the first and second contacts, and a disconnector maintaining the first and second contacts spaced from one another, preventing formation of a circuit. A method for operating a tool including applying or removing a magnetic field configuration and causing a first and second contact within the tool to make electrical contact. A borehole system including a borehole in a subsurface formation, and disposed in the borehole.

Abstract: Magnetic coupling devices are disclosed which may be configured in at least three states. The various states may be provided through one or more of altering a position of a permanent magnet relative to another permanent magnet and altering a current level in a coil surrounding a permanent magnet.

Abstract: Magnetic coupling devices are disclosed which may be configured in at least three states. The various states may be provided through one or more of altering a position of a permanent magnet relative to another permanent magnet and altering a current level in a coil surrounding a permanent magnet.

Abstract: The occurrence angle of a crack with respect to a reference line passing by a tooth shoulder portion perpendicularly to the radial direction of a tooth is defined as ?. A phased array probe is placed in advance at a position on the outer circumferential surface of a retaining ring that is located in a direction estimated to be perpendicular to the occurrence angle ?, and sector scan is performed with an ultrasonic beam radiated from the phased array probe, thereby inspecting whether or not the crack has occurred at the tooth shoulder portion.