A vibration motor includes a stator, a vibrator capable of vibrating in an axial direction, and an elastic member that connects the vibrator and the stator and is arranged on the axially upper side of the vibrator. The vibrator includes a mass body and a magnet member fixed to the mass body on the axially lower side of the mass body. The mass body includes a base portion extending in a radial direction and a column portion extending axially downward from the base portion. The magnet member has a hole portion recessed axially downward from an upper surface or penetrating through the magnet member. An outer edge of the hole portion is arranged radially outward of the column portion. The base portion faces an upper end of the coil in the axial direction.

A vibration motor includes a stator, a vibrator capable of vibrating in an axial direction, and an elastic member that connects the vibrator and the stator and is arranged on the axially upper side of the vibrator. The vibrator includes a mass body and a magnet member fixed to the mass body on the axially lower side of the mass body. The mass body includes a base portion extending in a radial direction and a column portion extending axially downward from the base portion. The magnet member has a hole portion recessed axially downward from an upper surface or penetrating through the magnet member. An outer edge of the hole portion is arranged radially outward of the column portion. The base portion faces an upper end of the coil in the axial direction.

A magnetic levitation system comprising a control system configured to control six degrees of freedom of a levitated object, wherein each degree of freedom has at least a third order roll off. Another system and a method are also disclosed.

A linear vibration motor is disclosed, which comprises a housing having a receiving space; a vibrator unit received in the receiving space; an elastic members having one end connecting to the vibrator unit and another end connecting to the housing for suspending the vibrator unit in the receiving space; a first damping member arranged between the housing and one side of the elastic member; and a second damping member arranged between the vibrator unit and the other side of the elastic member.

A linear vibration motor is disclosed, which comprises a housing having a receiving space; a vibrator unit received in the receiving space; an elastic members having one end connecting to the vibrator unit and another end connecting to the housing for suspending the vibrator unit in the receiving space; a first damping member arranged between the housing and one side of the elastic member; and a second damping member arranged between the vibrator unit and the other side of the elastic member.

A novel method of triggering an electromagnetic type energy harvesting generator that has disposed a spherical magnet, surrounded by a coil of wire and rotatable in an enclosure about an axis with an axially protruding paddle member, axially aligned dual offset paddle members, or other flick trigger mechanism structure situated tangent along the surface of the spherical magnet enclosure, whereinthis enclosed magnet is centred within the electrical coil, which is free to rotate about its axis. The magnet is held in a static state rotational position by two opposite outwardly disposed flux focus magnets. The spherical magnet and the focus magnets are all in a magnetic attractive circuit; and the magnetic flux lines are in a static field concentration throughout the coil windings aided by the focus magnets. A reciprocating trigger device means with a contact finger is utilized to engage the axially protruding paddle member(s).

A novel method of triggering an electromagnetic type energy harvesting generator that has disposed a spherical magnet, surrounded by a coil of wire and rotatable in an enclosure about an axis with an axially protruding paddle member, axially aligned dual offset paddle members, or other flick trigger mechanism structure situated tangent along the surface of the spherical magnet enclosure, whereinthis enclosed magnet is centred within the electrical coil, which is free to rotate about its axis. The magnet is held in a static state rotational position by two opposite outwardly disposed flux focus magnets. The spherical magnet and the focus magnets are all in a magnetic attractive circuit; and the magnetic flux lines are in a static field concentration throughout the coil windings aided by the focus magnets. A reciprocating trigger device means with a contact finger is utilized to engage the axially protruding paddle member(s).

An electromagnetic transducer for harvesting vibratory energy is provided. In particular, an electromagnetic transducer comprising a support, a central mass, and at least one spring linking the central mass to the support, the spring allowing the displacement of the central mass with respect to the support on a first axis. A set of electromagnetic transducers is also provided.

An actuator is provided, including a fixed assembly and a movable assembly. The fixed assembly includes a coil module, a base, a first screwing member, and a linear rail. The first screwing member passes through the base and the linear rail, and the linear rail is positioned on the base. The movable assembly includes a U-shaped back board having an inner space, a first magnetic module, a second magnetic module aligned with the first magnetic module, and a sliding block. The first and second magnetic modules are disposed on the U-shaped back board and accommodated in the inner space. The coil module is disposed between the first magnetic module and the second magnetic module. The sliding block is positioned on the U-shaped back board in the inner space, and slidably connected to the linear rail.

An actuator is provided, including a fixed assembly and a movable assembly. The fixed assembly includes a coil module, a base, a first screwing member, and a linear rail. The first screwing member passes through the base and the linear rail, and the linear rail is positioned on the base. The movable assembly includes a U-shaped back board having an inner space, a first magnetic module, a second magnetic module aligned with the first magnetic module, and a sliding block. The first and second magnetic modules are disposed on the U-shaped back board and accommodated in the inner space. The coil module is disposed between the first magnetic module and the second magnetic module. The sliding block is positioned on the U-shaped back board in the inner space, and slidably connected to the linear rail.