Abstract: The present invention relates to wobbly balls and exercise coil springs. A wobbly ball may include a non-spherical rigid, hollow ball body formed of two halves, each half comprising an upper ladle or a lower ladle which are welded together along a central seam therebetween, and defining a hollow cavity therein. A spherical inner ball is captured within the hollow cavity of the hollow ball body of the wobbly ball, so that upon movement of the wobbly ball, the inner ball rolls within the cavity, producing a wobbly, eccentric motion. The exercise coil spring may be formed of a single coiled wire, the coiled spring including a central portion where the coiled wire is coiled to a first diameter that is constant. Opposed flared ends are provided ends of the central portion where the coiled wire is progressively coiled from the first diameter to a second diameter, which is greater.

Abstract: A rotor core includes a plurality of first electromagnetic steel plates that are stacked in an axial direction and a plurality of second electromagnetic steel plates that are stacked in an axial direction at both ends of the electromagnetic steel plate group thereof. The first electromagnetic steel plates are provided therein with magnet insertion holes and first flux barriers. The second electromagnetic steel plates are provided therein with the magnet insertion holes, second flux barriers, and projections that regulate the positions of the magnets. The second electromagnetic steel plates are stacked at at least one of the axial direction ends of the electromagnetic steel plate group including the plurality of first electromagnetic steel plates and are provided at a position overhanging the axial direction end of a stator core.

Abstract: Power generated by a vibration power generator using an electret is efficiently supplied to a power supply load. A vibration power generator includes a first substrate and a second substrate configured to be moved relative to each other by external vibration while remaining opposite each other, a group of a plurality of electrets arranged in the relative movement direction on one surface side of the first substrate, and a group of a plurality of electrodes arranged in the relative movement direction on a surface side of the second substrate opposite to the group of electrets, the group of electrodes including first current collecting electrodes and second current collecting electrodes electrically connected to respective power supply loads to which power generated by the external vibration is supplied, and ground electrodes each provided between the first current collecting electrode and the second current collecting electrode and grounded.

Abstract: An actuator device includes a motor and a reduction device operatively coupled to the motor and oriented about a central axis, the reduction device configured to modify an input angle of rotation provided by the motor to an output angle of rotation. Further included is a rotary flexure mechanism that includes a rotary flexure operatively coupled to an output portion of the reduction device. The rotary flexure mechanism also includes a plurality of flexure blades coupled to the rotary flexure, each of the flexure blades angularly oriented from the central axis. The rotary flexure mechanism further includes a diaphragm flexure pair operatively coupled to the flexure blades, wherein the diaphragm flexure comprises a rotational and in-plane stiffness greater than an axial stiffness resulting in the rotary flexure mechanism being configured to convert a rotational input to an axial translation.

Abstract: The invention relates to an electrical machine (1, 51), in particular an asynchronous machine, comprising a stator (2), a rotor (4) which is rotatably mounted about a rotation axis (3) and magnetically interacts with the stator (2) during operation of the electrical machine (1, 51), a shaft (5) on which the rotor (4) is fixed and which has an axial hole (6), and an inflow element (7, 47) which extends into the axial hole (6) such that a coolant (15), in particular a cooling liquid (15), can flow into the axial hole (6) from the inflow element (7, 47). The invention also relates to a cooling system (50) comprising an electrical machine (1, 51) and a coolant circuit (55) for transporting the coolant (15), in particular the cooling liquid (15), through the axial hole (6), and to a vehicle (61) comprising a cooling system (50).

Abstract: An embodiment of an electromagnetic actuator, such as a moving magnet actuator (MMA), includes a back iron, a first coil winding, a second coil winding, a mover, and a permanent magnet. The first and second coil windings are connected to the back iron, and have generally annular shapes. The mover moves relative to the back iron during use of the MMA. The permanent magnet is connected to the mover and moves with the mover during use of the MMA. The permanent magnet has a generally annular shape.

Abstract: An active part of an electrical machine includes teeth, each having a tooth base, a tooth height, open or closed grooves between the teeth, and windings introduced into the grooves. Each winding encloses at least one of the teeth. The active part has a thickness, starting from the outer surface of the respective tooth bases and extending along the teeth, that is greater than the tooth height. The active part, starting from the respective tooth base up to a limit depth, which is not more than equal the tooth height, has a first material with a first magnetic permeability and starting from the limit depth a second material with a second magnetic permeability. The first magnetic permeability is greater than the second magnetic permeability. The limit depth is essentially half as great as the tooth height.

Abstract: A rotary electromagnetic actuator is provided which is suitable for opening and closing a valve for example. The actuator comprises a rotor, a stator, and a biasing arrangement for applying a torque to the rotor during at least part of its rotation. A plurality of stable rest positions for the rotor are defined by forces acting on the rotor and the actuator is controllable to move the rotor from one stable rest position to another. The torque applied by the biasing arrangement varies with the rotational position of the rotor such that at a primary rest position and at least a second rest position, it is sufficiently low to enable selection of those positions, and then it increases beyond the second rest position.

Abstract: Superconducting field poles each include a superconducting coil body formed by spirally winding a superconducting wire material, a ferromagnetic outer magnetic field-deflecting member arranged on an end face of the superconducting coil body at a radially outer side of a rotor, and a ferromagnetic inner magnetic field-deflecting member arranged on an end face of the superconducting coil body at a radially inner side of the rotor.

Abstract: An electromechanical actuator housing assembly comprising a reinforcement ring is disclosed herein. The design of the electromechanical actuator housing assembly may be directed to improving load measurement accuracy. The design of the electromechanical actuator housing assembly may be directed to reducing housing deflections. A method of manufacture of an EMA housing assembly is also disclosed herein. This method may include an electromechanical actuator housing assembly having a reinforcement ring.

Abstract: The invention relates to a transmission drive assembly (10) having a drive motor (11) the drive shaft (23) of which protrudes with a portion (25) thereof into a transmission housing (12), wherein the drive shaft (23) is arranged on the side facing the transmission housing (12) in a bearing (32) which is held in a form-fit or force-closed manner in a substantially sleeve-shaped holding element (35; 65) which is arranged in a holding fixture (27) of the transmission housing (12).

Abstract: The present invention relates to a pre-collapsed capacitive micro-machined transducer cell (10) comprising a substrate (12) comprising a first electrode (16), a membrane (14) comprising a second electrode (18), wherein the cell has an outer region (22) where the membrane (14) is mounted to the substrate (12) and an inner region (20) inside or surrounded by the outer region (22), wherein the membrane (14) is collapsed to the substrate (12) in a first collapsed annular-shaped region (24) located within the inner region (20).

Abstract: An electric machine comprise a first carrier having an array of electromagnetic elements and a second carrier having electromagnetic elements defining magnetic poles, the second carrier being arranged to move relative to the first carrier. An airgap is provided between the first carrier and the second carrier. The electromagnetic elements of the first carrier include posts, with slots between the posts, one or more electric conductors in each slot, the posts of the first carrier having a post height in mm. The first carrier and the second carrier together define a size of the electric machine. The magnetic poles having a pole pitch in mm. The size of the motor, pole pitch and post height are selected to fall within a region in a space defined by size, pole pitch and post height that provides a benefit in terms of force or torque per weight per excitation level.

Abstract: The invention concerns a rotatable transverse flux electrical machine (TFEM) comprising a stator portion; and a rotor portion rotatably located in respect with the stator portion, the rotor portion including an alternate sequence of magnets and concentrators radially disposed about a rotation axis thereof; the stator portion including at least one phase, the at least one phase including a plurality of cores cooperating with a coil disposed about the rotation axis, each core including a skewed pair of poles to progressively electromagnetically engage an electromagnetic field of respective cooperating concentrators. The invention is also concerned with a plurality of elements located in desired positions in the TFEM and also with a linear TFEM.

Abstract: Embodiments of the present disclosure include an actuator for steering mirrors with low magnetic hysteresis losses at high frequencies, with a fast step response, and without excessive heating of the steering mirror. Various embodiments of the actuator include two stators (a left stator and a right stator or an inner stator and an outer stator) and a rotor positioned between the stators. Each stator has a core assembly with one or more cores, two or more legs, and two or more faces positioned proximate to the rotor. The two or more legs are separated from one another by portions of the one or more coils. The rotor includes a core and a plurality of magnets, where each magnet has a face positioned proximate to the faces of one core assembly.

Abstract: A linear actuator, comprising a base housing, a top housing, and a piston assembly. The base housing may include at least one recess configured to restrain at least one magnet in three dimensions and a channel configured to receive a linear guide. The top housing may be fixedly attached to the base housing and may include at least one recess configured to restrain another at least one magnet in three dimensions. The piston assembly may include at least one coil bobbin, a shaft, a linear encoder scale, and a flex cable, wherein the piston assembly may be positioned between the base housing and the top housing.

Abstract: An electric machine comprise a first carrier having an array of electromagnetic elements and a second carrier having electromagnetic elements defining magnetic poles, the second carrier being arranged to move relative to the first carrier. An airgap is provided between the first carrier and the second carrier. The electromagnetic elements of the first carrier include posts, with slots between the posts, one or more electric conductors in each slot, the posts of the first carrier having a post height in mm. The first carrier and the second carrier together define a size of the electric machine. The magnetic poles having a pole pitch in mm. The size of the motor, pole pitch and post height are selected to fall within a region in a space defined by size, pole pitch and post height that provides a benefit in terms of force or torque per weight per excitation level.

Abstract: A linear actuator, comprising a base housing, a top housing, and a piston assembly. The base housing may include at least one recess configured to restrain at least one magnet in three dimensions and a channel configured to receive a linear guide. The top housing may be fixedly attached to the base housing and may include at least one recess configured to restrain another at least one magnet in three dimensions. The piston assembly may include at least one coil bobbin, a shaft, a linear encoder scale, and a flex cable, wherein the piston assembly may be positioned between the base housing and the top housing.

Abstract: An electric machine comprise a first carrier having an array of electromagnetic elements and a second carrier having electromagnetic elements defining magnetic poles, the second carrier being arranged to move relative to the first carrier. An airgap is provided between the first carrier and the second carrier. The electromagnetic elements of the first carrier include posts, with slots between the posts, one or more electric conductors in each slot, the posts of the first carrier having a post height in mm. The first carrier and the second carrier together define a size of the electric machine. The magnetic poles having a pole pitch in mm. The size of the motor, pole pitch and post height are selected to fall within a region in a space defined by size, pole pitch and post height that provides a benefit in terms of force or torque per weight per excitation level.

Abstract: An electric machine comprise a first carrier having an array of electromagnetic elements and a second carrier having electromagnetic elements defining magnetic poles, the second carrier being arranged to move relative to the first carrier. An airgap is provided between the first carrier and the second carrier. The electromagnetic elements of the first carrier include posts, with slots between the posts, one or more electric conductors in each slot, the posts of the first carrier having a post height in mm. The first carrier and the second carrier together define a size of the electric machine. The magnetic poles having a pole pitch in mm. The size of the motor, pole pitch and post height are selected to fall within a region in a space defined by size, pole pitch and post height that provides a benefit in terms of force or torque per weight per excitation level.