A linear vibration actuator includes: a casing and a bracket coupled to each other to form an internal space thereof; a centering yoke located on the center of the casing or bracket; a coil fitted to the centering yoke; a vibration yoke located in the internal space in such a manner as to be vibrated by the magnetic force generated from the centering yoke; an elastic member whose one end is fixed to the casing or bracket and the other end supports the vibration yoke to provide an elastic force; and a printed circuit board for supplying a power source to the coil.

The invention discloses a control system for LRA, applicable to an LRA having a speed sensing coil. The control system comprises a signal amplifier, an excitation device, a flow controller, a processing unit, and a driver. The processing unit is connected to the signal amplifier, the excitation device and the flow controller, so as to stop output, output the excitation signal as a driving signal or process the induction signal from the signal amplifier into an appropriate system damping coefficient and output as a driving signal when the flow controller outputs a stop, excitation or braking state signal, respectively.

The invention discloses a control system for LRA, applicable to an LRA having a speed sensing coil. The control system comprises a signal amplifier, an excitation device, a flow controller, a processing unit, and a driver. The processing unit is connected to the signal amplifier, the excitation device and the flow controller, so as to stop output, output the excitation signal as a driving signal or process the induction signal from the signal amplifier into an appropriate system damping coefficient and output as a driving signal when the flow controller outputs a stop, excitation or braking state signal, respectively.

The present disclosure provides a vibration motor and a mobile communication device using same. The vibration motor includes an housing, a vibrator accommodated in the housing, a driving apparatus driving the vibrator to vibrate, and an elastic part elastically supporting the vibrator, where the driving apparatus is a secondary coil accommodated in the housing, the vibrator is provided with a magnet steel corresponding to the coil, the vibration motor further includes a primary coil, disposed outside the housing, corresponding to the secondary coil, and spaced apart from the secondary coil, and the primary coil is electrically connected to the outside to generate an alternating electromagnetic field, to cause the secondary coil to generate an induced electromotive force, and cause relative vibration between the vibrator and the secondary coil.

The present disclosure provides a vibration motor and a mobile communication device using same. The vibration motor includes an housing, a vibrator accommodated in the housing, a driving apparatus driving the vibrator to vibrate, and an elastic part elastically supporting the vibrator, where the driving apparatus is a secondary coil accommodated in the housing, the vibrator is provided with a magnet steel corresponding to the coil, the vibration motor further includes a primary coil, disposed outside the housing, corresponding to the secondary coil, and spaced apart from the secondary coil, and the primary coil is electrically connected to the outside to generate an alternating electromagnetic field, to cause the secondary coil to generate an induced electromotive force, and cause relative vibration between the vibrator and the secondary coil.

The present disclosure provides a vibration motor and a mobile communication device using same. The vibration motor includes an housing, a vibrator accommodated in the housing, a driving apparatus driving the vibrator to vibrate, and an elastic part elastically supporting the vibrator, where the driving apparatus is a secondary coil accommodated in the housing, the vibrator is provided with a magnet steel corresponding to the coil, the vibration motor further includes a primary coil, disposed outside the housing, corresponding to the secondary coil, and spaced apart from the secondary coil, and the primary coil is electrically connected to the outside to generate an alternating electromagnetic field, to cause the secondary coil to generate an induced electromotive force, and cause relative vibration between the vibrator and the secondary coil.

The present disclosure provides a vibration motor and a mobile communication device using same. The vibration motor includes an housing, a vibrator accommodated in the housing, a driving apparatus driving the vibrator to vibrate, and an elastic part elastically supporting the vibrator, where the driving apparatus is a secondary coil accommodated in the housing, the vibrator is provided with a magnet steel corresponding to the coil, the vibration motor further includes a primary coil, disposed outside the housing, corresponding to the secondary coil, and spaced apart from the secondary coil, and the primary coil is electrically connected to the outside to generate an alternating electromagnetic field, to cause the secondary coil to generate an induced electromotive force, and cause relative vibration between the vibrator and the secondary coil.

An electromagnetic actuator for an active vibration isolation system, the electromagnetic actuator includes: a fixed core; a movable core that is opposed to the fixed core and is joined to a vibration member; and a coil unit having coils that surround part of the fixed core and the movable core. The movable core and the vibration member are vibrated in a reciprocating manner by energization to the coils, and the coils include a main coil to which an alternating current with a waveform corresponding to vibrations of a vibration generation source is input and a sub-coil that amplifies magnetic flux generated by the main coil.

An electromagnetic actuator for an active vibration isolation system, the electromagnetic actuator includes: a fixed core; a movable core that is opposed to the fixed core and is joined to a vibration member; and a coil unit having coils that surround part of the fixed core and the movable core. The movable core and the vibration member are vibrated in a reciprocating manner by energization to the coils, and the coils include a main coil to which an alternating current with a waveform corresponding to vibrations of a vibration generation source is input and a sub-coil that amplifies magnetic flux generated by the main coil.