Abstract:
The present invention relates to a method for actuating a vibration motor, and more particularly, to a method for saving various formats of vibration pattern data of a vibration motor by using only an initial vibration frequency, change in vibration frequency, and the total number of vibrations. The method for saving a vibration pattern data, according to the present invention, can express various vibration patterns with a small amount of data by expressing various vibration patterns of a resonance-free frequency vibration motor in terms of the initial vibration frequency, the size of change in the vibration frequency, and the total number of vibrations necessary for reaching the final vibration frequency. In addition, the method for saving vibration pattern data, according to the present invention, can allow manufacturing of a user terminal enabling a haptic function at low cost by expressing the vibration pattern of the resonance-free frequency vibration motor with little data and low data processing speed.
Abstract:
There are provided a linear motor for generating a linear reciprocating motion force, and a reciprocating compressor for compressing a refrigerant by employing the linear motor. The linear motor and the reciprocating compressor employing the same can reduce the number of inverter switches by employing a coil unit whose winding method is improved and a power supply apparatus whose connection to the coil unit and other circuits are improved, and can make it easy to control and reduce production costs by simplifying the circuit configuration.
Abstract:
The present invention relates to a reciprocating compressor in which a piston is linearly reciprocated inside a cylinder, for sucking a refrigerant into a compression space, and compressing and discharging the refrigerant, and more particularly, to a reciprocating compressor which includes a power supply apparatus whose circuit unit is simplified due to a reduction in the number of inverter switches. A reciprocating compressor, which comprises a piston, a cylinder, a coil section provided in the cylinder and linearly reciprocating the piston, and a power supply apparatus for supplying power to the coil section, comprises: a rectifier section for rectifying an AC voltage supplied from an AC power supply unit; a DC link section for stabilizing the amplitude of the rectified voltage; and an inverter switch unit consisting of a pair of inverter switches connected to the DC link section, for applying the stabilized voltage to the coil section, both ends of the coil section being connected between the DC link section and the pair of inverter switches to allow the coil section to directly receive power from the DC link section, thus reducing the numnber of inverter switches.
Abstract:
An apparatus (100,200) comprises a brushless motor (10), driver (110,114), incremental displacement sensor (120), and processor (130). The motor (10) has a rotor (12), stator (22), and electrical terminals accepting a drive signal. The initial phase of the rotor (12) is unknown. The driver (110,114) is connected to the electrical terminals and produces the drive signal. The displacement sensor (120) is configured to measure a displacement of the rotor (12) and to produce an output signal. The processor (130) has an input receiving the output signal and an output connected to the driver (110,114). The processor (130) causes the driver (110,114) to produce the drive signal according to a predetermined function of time, observes the output signal from the displacement sensor (120) resulting from the drive signal, and performs mathematical computations on the basis of the observed output signal and a model of dynamic behavior of the motor (10) to estimate the initial phase of the rotor (12).