The present invention provides a permanent magnet-electromagnet synergistic coupling-based high-speed solenoid valve with a high dynamic response and a low rebound, including a shell and an iron core. The iron core is installed in the shell, an axial center through hole is formed in a middle of the iron core, a spring limiting sleeve is installed in the axial center through hole, an armature and a reset spring cavity are sequentially formed below the iron core, an upper portion of a valve rod is located in the spring limiting sleeve, an upper disc permanent magnet, a lower disc permanent magnet and a spring washer are arranged in the spring limiting sleeve, and a giant magnetostrictor is installed between the upper disc permanent magnet and the lower disc permanent magnet. By means of the present invention, electromagnetic force generated during pickup of the armature can be effectively improved.

The present invention provides a permanent magnet-electromagnet synergistic coupling-based high-speed solenoid valve with a high dynamic response and a low rebound, including a shell and an iron core. The iron core is installed in the shell, an axial center through hole is formed in a middle of the iron core, a spring limiting sleeve is installed in the axial center through hole, an armature and a reset spring cavity are sequentially formed below the iron core, an upper portion of a valve rod is located in the spring limiting sleeve, an upper disc permanent magnet, a lower disc permanent magnet and a spring washer are arranged in the spring limiting sleeve, and a giant magnetostrictor is installed between the upper disc permanent magnet and the lower disc permanent magnet. By means of the present invention, electromagnetic force generated during pickup of the armature can be effectively improved.

A portable electronic device and a movable lens-shutting module thereof are provided. The lens-shutting module includes a first magnetic assembly, a second magnetic assembly and a movable shielding assembly. The first magnetic assembly includes a fixed magnetic field generator and a movable magnetic structure including a matching portion. The second magnetic assembly includes a fixed magnetic structure, a flexible structure and a movable magnetic field generator including a limiting portion. The movable shielding assembly includes a lens shielding portion corresponding to a lens module, a matching opening matching with the matching portion, and a limiting opening corresponding to the limiting portion. Therefore, the movable magnetic structure is movable horizontally between a first and a second horizontal position relative to the fixed magnetic field generator, and the movable magnetic field generator is movable vertically between a first and a second vertical position relative to the fixed magnetic structure.

A torque motor for use in a servovalve wherein only two holes must be provided through each of the pole pieces in order to assemble the torque motor together. The torque motor comprises first and second opposing pole pieces, first and second permanent magnets positioned between the first and second pole pieces; an armature comprising a magnetic plate and a flapper, the magnetic plate being positioned between the first and second permanent magnets, the flapper being connected at one end to the magnetic plate; and further comprising: first and second fastening means each extending through the first pole piece, the armature and the second pole piece to thereby fasten the torque motor together.

A torque motor for use in a servovalve wherein only two holes must be provided through each of the pole pieces in order to assemble the torque motor together. The torque motor comprises first and second opposing pole pieces, first and second permanent magnets positioned between the first and second pole pieces; an armature comprising a magnetic plate and a flapper, the magnetic plate being positioned between the first and second permanent magnets, the flapper being connected at one end to the magnetic plate; and further comprising: first and second fastening means each extending through the first pole piece, the armature and the second pole piece to thereby fasten the torque motor together.

An apparatus for rotating a shaft by using an electromagnet is provided. Permanent magnets are placed around a shaft to rotate with the shaft, and an electromagnet is placed outside the circumference of the permanent magnets, and a device for activating electromagnet is placed. Two secondary cell batteries are used to activate the electromagnet and the electromagnet makes the permanent magnets rotate. The secondary cell batteries are charged using back-emf which occurs in the electromagnet. Coils are placed around the circumference of the permanent magnets and the rotating permanent magnets generate electricity to the coils.

An apparatus for rotating a shaft by using an electromagnet is provided. Permanent magnets are placed around a shaft to rotate with the shaft, and an electromagnet is placed outside the circumference of the permanent magnets, and a device for activating electromagnet is placed. Two secondary cell batteries are used to activate the electromagnet and the electromagnet makes the permanent magnets rotate. The secondary cell batteries are charged using back-emf which occurs in the electromagnet. Coils are placed around the circumference of the permanent magnets and the rotating permanent magnets generate electricity to the coils.

An apparatus for operating as DC motor and DC generator is provided. Two permanent magnets are placed to be able to rotate with a shaft and one coil is placed outside the circumference of the permanent magnets and one device for making electric current flow in the coil is placed. Two secondary cell batteries are used to supply electric current to the coil. The secondary cell batteries are charged by using back-emf which occurs in the coil. If the shaft rotates without using the secondary cell batteries, the secondary cell batteries are charged by the rotating permanent magnets.

A bi-stable solenoid device is proposed, comprising an armature, which is linearly movable between two opposite end stops and comprising a damping unit, which is in communication with the armature and which is configured to dampen and/or to prevent an impact of the armature on at least one of the end stops by a compression and/or an expansion of a gas volume.

An electromagnetic actuator comprising a moving armature (41) comprising a pin (43) and a permanent magnet arrangement (45) arranged coaxially with the pin (43) and secured to it, and an excitation coil arrangement (42) arranged coaxially with the pin (43). The coil arrangement (42) is suppliable with a current to cause a movement of the movable armature (41). The actuator further comprises a surface (51) of ferromagnetic material. The permanent magnet arrangement (45) is axially interposed between the surface (51) of ferromagnetic material and the excitation coil arrangement (42). The permanent magnet arrangement (45) comprises a plurality of permanent magnet regions (45a) arranged around the pin (43) of the moving armature (41), wherein each permanent magnet region (45a) has a polarity opposite to the polarities of the permanent magnet regions (45a) angularly adjacent thereto. The excitation coil arrangement (42) comprises a coil having a lobed shape.