Some examples herein provide a method for generating a magnetic field. The method may include accumulating positive charges at a first electrode; accumulating negative charges at a second electrode; and rotating the first electrode relative to the second electrode so as to induce a relative angular velocity between the positive charges and the negative charges and thus generate a magnetic field. In some examples, the magnetic field may be used for propulsion.

The invention comprises a harmonic filter apparatus and method of use thereof for magnetically isolating and filtering individual phases of three-phase power comprising a delta circuit that includes: (1) a first leg connecting to a second leg and a third leg and (2) first circuitry on the first leg matching second circuitry on the second leg, the first circuitry comprising at least two contactors electrically wired in parallel, the harmonic filter magnetically isolating individual phases of three-phase power, where inductor—coupled inductor pairs couple apexes of the delta circuit to individual phases of the three-phase power.

The invention comprises a harmonic filter apparatus and method of use thereof for magnetically isolating and filtering individual phases of three-phase power comprising a delta circuit that includes: (1) a first leg connecting to a second leg and a third leg and (2) first circuitry on the first leg matching second circuitry on the second leg, the first circuitry comprising at least two contactors electrically wired in parallel, the harmonic filter magnetically isolating individual phases of three-phase power, where inductor—coupled inductor pairs couple apexes of the delta circuit to individual phases of the three-phase power.

Coil-based actuators for use in opening and closing the separable contacts of circuit interrupters provide increased initial velocity for opening strokes and damping at the end of opening strokes. Electronics for adjusting the current profile of current supplied to coil-based actuators additionally provide increased initial velocity for opening strokes and damping at the conclusion of opening strokes.

Coil-based actuators for use in opening and closing the separable contacts of circuit interrupters provide increased initial velocity for opening strokes and damping at the end of opening strokes. Electronics for adjusting the current profile of current supplied to coil-based actuators additionally provide increased initial velocity for opening strokes and damping at the conclusion of opening strokes.

Coil-based actuators for use in opening and closing the separable contacts of circuit interrupters provide increased initial velocity for opening strokes and damping at the end of opening strokes. Electronics for adjusting the current profile of current supplied to coil-based actuators additionally provide increased initial velocity for opening strokes and damping at the conclusion of opening strokes.

A magnetic field application device includes a magnetic field application unit provided with a magnetic working substance, a permanent magnet, a yoke and a coil. The magnetic field application unit applies a magnetic field to the magnetic working substance. The yoke forms at least two closed magnetic circuits, each being a closed circuit that magnetically connects both ends in a magnetization direction of the permanent magnet. The coil is capable of changing an intensity of the magnetic field applied to the magnetic working substance. The coil is provided in at least one of the closed magnetic circuits. The magnetic field application unit is disposed in at least one of the closed magnetic circuits. A magnetic flux of the permanent magnet is branched to flow through two or more of the closed magnetic circuits including the closed magnetic circuit provided with the magnetic field application unit when the coil is non-energized.

In one embodiment, an electromagnetic soft actuator includes a first soft outer member comprising a soft internal electrically conductive coil, a second soft outer member comprising a soft internal electrically conductive coil, and a soft inner shaft on which the first and second soft outer members are mounted, the first and second soft outer members being linearly displaceable along a length of the soft inner shaft, the soft inner shaft comprising a permanent magnet, wherein the first and second outer members linearly move under an electromagnetic force relative to the soft inner shaft and each other when an electric current is applied to the soft internal electrically conductive coils.

Provided is a magnetic clamp device having a disassembly structure that is easy to maintain. In the magnetic clamp device 1, a magnetic pole 21 and an alnico magnet 23 each have fastening holes 21a, 23a that communicate with each other. The cavity portion 31 of the plate body 3 has an opening 33 that penetrates from the bottom surface 32b thereof to the back side of the plate body 3. A cap 7 having a base portion 71 having a bolt hole 74 communicating with the fastening holes 21a, 23a and a flange portion 72 abutting the surface 3b of the back side of the plate body 3 is inserted into the opening 33. A bolt 8 inserted into the fastening hole 23a of the magnetic pole 21 and the alnico magnet 23 from the front side of a magnetic pad 2 is screwed into a female screw thread 74a provided in the bolt hole 74 of the cap 7.

A high-speed solenoid includes a casing, a least two pairs of first permanent magnet and second permanent magnet installed in the casing, and coils corresponding to the pairs of first permanent magnet and second permanent magnet provided in the same number as the number thereof in a bobbin of a mover. In magnetic paths formed by the pairs of first permanent magnet and second permanent magnet and the coils, each magnetic path corresponding to each pair of first permanent magnet and second permanent magnet is separated from each other. Therefore, the multiple magnetic paths are formed to operate the mover. The high-speed solenoid has an advantage in that the mover is operated at a relatively high speed.