A power generating system using magnetic induction and a method of operating same are disclosed. The power generating system includes at least one stationary electromagnet receiving an excitation voltage from a power supply. The at least one stationary electromagnet has a north pole, a south pole and a magnetic field. The system also includes at least one stationary coil positioned inside the magnetic field and intersected by magnetic field lines of the at least one electromagnet such that when the at least one electromagnet is excited, an electromotive force (EMF) is induced in the at least one stationary coil. The power supplied may be AC or DC. The system also includes a frequency modulator for changing the rate of electric current introduced to the at least one electromagnet so that the change of current rate will cause an EMF to be induced in the coil.

Presented are a single coil apparatus and a method of forming. An exemplary apparatus includes solenoid assembly. The solenoid assembly includes a core tube extending along a longitudinal axis. The solenoid assembly further includes a first magnet and a second magnet located outside the core tube, the first magnet spaced along the longitudinal axis from the second magnet, and an excitation coil disposed radially outward of the first magnet and the second magnet.

A stationary core is in an exciting coil. A yoke covers an outer periphery and an axial end of the exciting coil to form a magnetic circuit and has an opening portion. The movable core faces the stationary core through the opening portion and is attracted toward the stationary core on energization of the exciting coil. A return spring urges the movable core against the attraction direction. A first gap is formed between the stationary core and the movable core on deenergization of the exciting coil. A second gap is formed between the yoke and the movable core on deenergization of the exciting coil. The second gap allows the yoke and the movable core to generate an attractive force therebetween on energization of the exciting coil. The return spring is made of a magnetic material to magnetically bridge the first gap or the second gap.

A method for controlling an electromagnetic brake (1) having a coil carrier (2), a solenoid (5), an armature disc (7), and at least one further force-exerting element. The internal and external poles (3, 4) of the coil carrier each have a front surface with a varying gradient that fits, in a complementary fashion, the front surfaces of the respective internal and external poles (8, 9) of the armature disc. The brake has an air gap (11) which varies in size and forms a stroke region (21). When excitation occurs, the solenoid generates a magnetic force, and the force-exerting element generates an opposing force, wherein the ratio of the solenoid's magnetic force and the opposing force varies at least once between greater than and smaller than one during the movement of the armature disc in the stroke region owing to the variation of the excitation of the solenoid.

A method for controlling an electromagnetic brake (1) having a coil carrier (2), a solenoid (5), an armature disc (7), and at least one further force-exerting element. The internal and external poles (3, 4) of the coil carrier each have a front surface with a varying gradient that fits, in a complementary fashion, the front surfaces of the respective internal and external poles (8, 9) of the armature disc. The brake has an air gap (11) which varies in size and forms a stroke region (21). When excitation occurs, the solenoid generates a magnetic force, and the force-exerting element generates an opposing force, wherein the ratio of the solenoid's magnetic force and the opposing force varies at least once between greater than and smaller than one during the movement of the armature disc in the stroke region owing to the variation of the excitation of the solenoid.

The present disclosure provides a multi-stable solenoid with one or more magnetic damping rings. In general, the magnetic damping rings provide an increased damping force to an armature of the multi-stable solenoid to ensure efficient operation, reduce detent position overshoot, and reduce an impact force at end positions.

A shaft outputs a thrust force in an axial direction by using a magnetic flux caused by an electric current flowing through a coil. A housing is made of resin and retains the shaft. The housing has a base portion having an outer circumferential surface, which is configured to be entirely in contact tightly with a sealing member. The housing further has a distal portion having an outer circumferential surface defining a depression. The outer circumferential surfaces of the base portion and the distal portion are substantially equal in diameter and are formed continuously.

The present disclosure provides an adsorption bar, a vacuum aligner system, and a control method of the vacuum aligner system. The adsorption bar includes an electromagnetic component and an adsorption member. The electromagnetic component includes a slide bar, a coil and a movable part. The coil is fixedly arranged on the slide bar. The movable part includes an elastic element and a magnet. One end of the elastic element is a fixed end which is fixedly connected to the slide bar, and the other end thereof is a free end which is connected to the magnet. The adsorption member is fixedly connected to the magnet and is exposed at one end, of the magnet, away from the coil. Current is applied to the coil to generate a magnetic field. The magnet longitudinally slides along the slide bar under a repulsive force of the magnetic field.

The present disclosure provides an adsorption bar, a vacuum aligner system, and a control method of the vacuum aligner system. The adsorption bar includes an electromagnetic component and an adsorption member. The electromagnetic component includes a slide bar, a coil and a movable part. The coil is fixedly arranged on the slide bar. The movable part includes an elastic element and a magnet. One end of the elastic element is a fixed end which is fixedly connected to the slide bar, and the other end thereof is a free end which is connected to the magnet. The adsorption member is fixedly connected to the magnet and is exposed at one end, of the magnet, away from the coil. Current is applied to the coil to generate a magnetic field. The magnet longitudinally slides along the slide bar under a repulsive force of the magnetic field.

A linear actuation assembly includes an electromagnetic coil configured to allow electric current to pass therethrough in either direction creating magnetic flux based on the electric current and its direction. The electromagnetic coil defines a center axis, an inner diameter, and first and second sides. A first set of magnets is disposed in end-to-end relation adjacent the first side of the electromagnetic coil at the inner diameter thereof. A second set of magnets is disposed in end-to-end relation adjacent the second side of the electromagnetic coil about the inner diameter thereof. The linear actuation assembly further includes at least one translator disposed adjacent the first and second sets of magnets opposite the electromagnetic coil. The at least one translator is latchable between a first position adjacent the first set of magnets and a second position adjacent the second set of magnets in response to the magnetic flux and the direction in which the electric current is flowing.