There is provided a power transmission device to switch a coupled state and an uncoupled state between a first member and a second member which are arranged in a transmission path of a driving force to thereby control transmission of the driving force. The device includes a movable body having ferromagnetic property, a first magnetic path and a second magnetic path, and a permanent magnet. The device also includes a driving portion to excite the electromagnet in the forward direction and then increases an attraction force on a side on which a magnetic flux is increased or decreased.

Disclosed are a soft bistable magnetic actuator, a fabrication method thereof, a fatigue testing device, and an auto underwater vehicle. The method for fabricating the soft bistable magnetic actuator includes the following operations: casting a soft precursor by injection molding, wherein the soft precursor consists of a soft deformable portion and a soft peripheral portion surrounded, the soft deformable portion is made of magnetic particles and polymer, and the soft peripheral portion is made of a magnetic particle, a mixture of organic liquid, and polymer; and extracting the organic liquid by an organic solvent shrinks the soft peripheral portion, buckles the soft deformable portion towards one side.

The present invention is in the field of a National Individual Floating Transportation Infrastructure (NIfTI) wherein floating vehicles can travel by magnetic levitation and propagation. The vehicles can travel at a controllable height above the existing, albeit modified, road infrastructure and at relatively high speeds.

A system for generating an asymmetric magnetic field. The system includes a drive circuit and a stacked winding structure coupled to the drive circuit. The stacked winding structure includes a plurality of winding layers. The plurality of winding layers includes a first winding layer including a first conductive winding having first turns and a second winding layer including a second conductive winding having second turns ion. The plurality of winding layers is arranged to produce a first magnetic field at a first side of the stacked winding structure and a second magnetic field at a second side of the stacked winding structure when the drive circuit electrically drives the plurality of winding layers. The first magnetic field is greater than the second magnetic field.

A magnetic field generating-apparatus for biostimulation including: a core formed by magnetic material; and coils wound around portions of the cores, wherein the core includes at least two pairs of leg portions which are juxtaposed each other, in which for the respective two pairs of leg portions, there are provided gap-portions which mutually cross each other, the coils include first coil portions and second coil portions forming a first magnetic-path and a second magnetic-path between the two pairs of leg portions and the gap-portions respectively; and wherein there is generated a magnetic field of first direction which lies on the first magnetic-path, there is generated a magnetic field of second direction which lies on the second magnetic-path, and depending on a magnetic field formed by synthesizing the magnetic field of first direction and the magnetic field of second direction, a living body is stimulated.

The invention concerns a method for generating a pulsed magnetic field, the method being implemented using a device (10) comprising an electrical supply (20), a switch (25), a capacitor (15) and a coil (30) having a first extremity (80) connected to an electrical ground and a second extremity (85), the capacitor (15) comprising a first electrode connected to the electrical ground and a second electrode, the switch (25) being able to commute between a first configuration wherein the second electrode and the second extremity (85) are electrically insulated and at least one second configuration wherein the second electrode and the second extremity (85) are electrically connected, the capacitor (15), the switch (25) and the coil (30) forming a series circuit when the switch (25) is in the second configuration, the series circuit being underdamped.

The invention concerns a method for generating a pulsed magnetic field, the method being implemented using a device (10) comprising an electrical supply (20), a switch (25), a capacitor (15) and a coil (30) having a first extremity (80) connected to an electrical ground and a second extremity (85), the capacitor (15) comprising a first electrode connected to the electrical ground and a second electrode, the switch (25) being able to commute between a first configuration wherein the second electrode and the second extremity (85) are electrically insulated and at least one second configuration wherein the second electrode and the second extremity (85) are electrically connected, the capacitor (15), the switch (25) and the coil (30) forming a series circuit when the switch (25) is in the second configuration, the series circuit being underdamped.

A method of the producing artificial gravity in an electromagnetized environment is provided with a bodysuit, a corridor, a plurality of mobile electromagnets, a plurality of mobile inertial measurement units (IMUs), a plurality of first fixed electromagnets, second fixed electromagnets, and at least one computing unit. The first fixed magnets and the second fixed magnets are integrated throughout the corridor to continuously generate a uniform magnetic field through the corridor. The mobile electromagnets are integrated throughout the bodysuit to electromagnetically interact with the first fixed electromagnets and the second fixed electromagnets, which simulates gravity as the bodysuit moves through the corridor. The mobile IMUs are integrated to the bodysuit so that the mobile IMUs sends spatial positioning and orientation data to the computing unit. This feedback data allows for better gravity simulation because the computing unit can then directionally and magnitudinally adjust the electromagnetic field of each mobile electromagnet.

An improved long range coil and driver assembly for a magnetic field generator wherein the driver and coil generate a large magnetic field is provided. The coil and driver assembly includes a source impedance control network which includes a plurality of pairs of resistors and amorphous noise suppression devices, and a coil that utilizes a unique basket weave winding pattern to reduce the effect of the back EMF from one wire on the adjoining wires, thereby reducing the impedance of the coil. The reduced impedance and improved impedance control increases the current that can flow creating a larger field.

A coupling mechanism for coupling a light vehicle to a surface, the coupling mechanism comprising: a magnetic coupling device arranged such that it may be switched between a first mode and a second mode, wherein in the first mode the device generates an external magnetic field less than a first strength, and in the second mode the device generates an external magnetic field of at least a second strength, the second strength being greater than the first strength; and a surface detection unit, coupled to the magnetic coupling device, and arranged to determine when the light vehicle is within a predetermined distance of a surface, wherein in response to the surface detection unit determining that the light vehicle is within the predetermined distance, switching the magnetic coupling device from the first mode to the second mode, to secure the light vehicle to the surface.