A tattoo machine includes a tubular housing and an electromagnetic assembly disposed in the tubular housing. The electromagnetic assembly includes a first through-hole extending axially therethrough. A magnet unit is disposed in the first through-hole and includes a second through-hole extending axially therethrough. A core bar extends through the second through-hole and includes a tattoo needle on an end thereof. The tattoo needle can be actuated by the magnet unit to an exposed position outside of a bottom end of the tubular housing. An electric power transmission unit is electrically connected to the electromagnetic assembly. The electric power transmission unit can be in electrical connection with a power grid or a power supply and can output alternating current to the electromagnetic assembly.

A tattoo machine includes a tubular housing and an electromagnetic assembly disposed in the tubular housing. The electromagnetic assembly includes a first through-hole extending axially therethrough. A magnet unit is disposed in the first through-hole and includes a second through-hole extending axially therethrough. A core bar extends through the second through-hole and includes a tattoo needle on an end thereof. The tattoo needle can be actuated by the magnet unit to an exposed position outside of a bottom end of the tubular housing. An electric power transmission unit is electrically connected to the electromagnetic assembly. The electric power transmission unit can be in electrical connection with a power grid or a power supply and can output alternating current to the electromagnetic assembly.

A linear electrical machine including a frame with a level reference plane, an array of electromagnets connected to the frame and coupled to an alternating current power source energizing each electromagnet, at least one reaction platen of paramagnetic, diamagnetic, or non-magnetic conductive material disposed to cooperate with the electromagnets of the array of electromagnets so that excitation of the electromagnets with alternating current generates levitation and propulsion forces against the reaction platen that controllably levitate and propel the reaction platen along at least one drive line, in a controlled attitude relative to the drive plane, and a controller operably coupled to the array of electromagnets and the alternating current power source and configured so as to sequentially excite the electromagnets with multiphase alternating current with a predetermined excitation characteristic so that each reaction platen is levitated and propelled with up to six degrees of freedom.

A linear electrical machine including a frame with a level reference plane, an array of electromagnets connected to the frame and coupled to an alternating current power source energizing each electromagnet, at least one reaction platen of paramagnetic, diamagnetic, or non-magnetic conductive material disposed to cooperate with the electromagnets of the array of electromagnets so that excitation of the electromagnets with alternating current generates levitation and propulsion forces against the reaction platen that controllably levitate and propel the reaction platen along at least one drive line, in a controlled attitude relative to the drive plane, and a controller operably coupled to the array of electromagnets and the alternating current power source and configured so as to sequentially excite the electromagnets with multiphase alternating current with a predetermined excitation characteristic so that each reaction platen is levitated and propelled with up to six degrees of freedom.

A method of disengaging an axle disconnect system including providing an actuator having a coil (214) at least partially surrounded by a housing (220), an armature (216) located within the housing and the coil, where the armature is capable of actuating between a first and second position, and at least one of the housing and the armature is part of a magnetic circuit. Applying a current to the coil and actuating the armature from the first position to the second position. Developing an uninterrupted magnetic flux through the magnetic circuit and stopping application of the current to the coil. Permitting the magnetic flux through the magnetic circuit to continue in its uninterrupted state and maintain the armature in the second position. Applying an alternating current, having decreasing amplitude over time, to the coil to dissipate the magnetic flux through the magnetic circuit.

A method of disengaging an axle disconnect system including providing an actuator having a coil (214) at least partially surrounded by a housing (220), an armature (216) located within the housing and the coil, where the armature is capable of actuating between a first and second position, and at least one of the housing and the armature is part of a magnetic circuit. Applying a current to the coil and actuating the armature from the first position to the second position. Developing an uninterrupted magnetic flux through the magnetic circuit and stopping application of the current to the coil. Permitting the magnetic flux through the magnetic circuit to continue in its uninterrupted state and maintain the armature in the second position. Applying an alternating current, having decreasing amplitude over time, to the coil to dissipate the magnetic flux through the magnetic circuit.

Provided is an apparatus for enhancing power efficiency, the apparatus including a magnetic substance configured to generate a magnetic field, a conductive wire configured to pass the magnetic field, and of which one end is electrically connected to a power line to which alternating current (AC) is applied, and a controller connected to another end of the conductive wire, and configured to apply, to the conductive wire, and to prevent a sudden overcurrent a voltage surge from flowing into an electric device. The conductive wire includes a conductive plate, and the conductive plate is disposed in a space in which the magnetic field is generated to be separate from the magnetic substance, and a first width of the conductive plate can be the same as or greater than a second width of the conductive wire.

In one embodiment, a solenoid valve for a vehicle braking system includes a magnet assembly having a winding support, a coil winding, a housing, and a cover disc. The solenoid value further includes a valve cartridge having a capsule, a valve insert, a valve seat, and an armature. The valve insert can be connected to the capsule, the armature can be guided within the capsule in an axially movable manner and has a closing element. The closing element and the valve seat can form a valve that can control a fluid flow through the valve cartridge. The coil winding can be wound on the winding support to form an electrical coil, which can be controlled using control signals applied to electrical connectors. The electric coil generates a magnetic force that can move the armature against a force of a return spring.

In one embodiment, a solenoid valve for a vehicle braking system includes a magnet assembly having a winding support, a coil winding, a housing, and a cover disc. The solenoid value further includes a valve cartridge having a capsule, a valve insert, a valve seat, and an armature. The valve insert can be connected to the capsule, the armature can be guided within the capsule in an axially movable manner and has a closing element. The closing element and the valve seat can form a valve that can control a fluid flow through the valve cartridge. The coil winding can be wound on the winding support to form an electrical coil, which can be controlled using control signals applied to electrical connectors. The electric coil generates a magnetic force that can move the armature against a force of a return spring.

An actuator includes a solenoid including a coil and a plunger, a switch circuit coupled to the coil, and a control circuit coupled to the switch circuit. The control circuit is configured to receive a feedback signal representative of a plunger position. The control circuit is also configured to provide power to the solenoid via the switch circuit and reduce power to the solenoid via the switch circuit in response to the feedback signal being representative of the plunger being in a full travel position.