Lg Electronics Inc.

Kyung-Bum Heo

Jae-Yoo Yoo

Chel-Woong Lee

Ji-Won Sung

Hyung-Joo Kim

Jae-Mo Lee

An apparatus for controlling an operation of a reciprocating compressor, includes: a control unit for detecting a current pushed amount of a piston when a TDC is detected as an inflection point of a phase difference between stroke and current, comparing the current pushed amount with a pushed amount reference value, and applying a DC voltage applied to a linear motor based on the comparison result. An AC voltage and a DC voltage are applied to the linear motor to increase the stroke, and when the TDC is detected, the current pushed amount is calculated and compared with the pushed amount reference value, and then, the DC voltage or a DC current applied to the linear motor is varied based on the comparison result, thereby obtaining a maximum compression volume without collision of the piston.

Driving control apparatus and method for linear compressor

An apparatus and method for controlling an operation of a reciprocating compressor are disclosed. The apparatus for controlling an operation of a reciprocating compressor includes: a TDC/BDC detecting unit for detecting a TDC and a BDC of the reciprocating compressor; and a controller for independently controlling the TDC and the BDC so as to fit each reference position based on the detected TDC and BDC. Efficiency of the reciprocating compressor can be enhanced by independently controlling a top dead center and a bottom dead center.

Apparatus and method for controlling operation of reciprocating compressor

An apparatus for controlling an operation of a reciprocating motor compressor includes a current integrator for integrating an alternating current applied to a motor of the compressor during each one cycle thereof; and a controller for differently controlling a firing angle of a triac during the positive phase and the firing angle of the triac during the negative phase of the AC voltage applied to the motor based on the integrated value of the current. A loss in the motor can be reduced by avoiding presence of a DC component in the current applied to the motor of the compressor.

Apparatus and method for controlling operation of reciprocating motor compressor

An apparatus and method for controlling driving of a linear motor, which is configured to increase efficiency of a linear compressor and stably drive the linear motor when the linear motor is overloaded. The apparatus includes a detector that detects a current applied to a motor, a controller that outputs a control signal based on the detected current and a switch that varies the number of windings of the linear motor coil on the basis of the control signal.

Apparatus and method for controlling driving of linear motor

Disclosed is an apparatus for controlling a driving of a reciprocating compressor and a method thereof, in which a cooling capacity is decreased without a re-expansion loss by controlling a driving of a compressor used in a refrigerator by using a current offset when the cooling capacity of a refrigerator is varied. To this end, in the compressor which controls the cooling capacity by varying an inner stroke according to a stroke reference value set by a user, the apparatus comprises a storage unit for storing a current offset value corresponding to a cooling capacity variable amount; an adding unit for adding the current offset value to a current value applied to the compressor in accordance with that the cooling capacity is varied by a user; a microcomputer for generating a switching control signal corresponding to the current value added from the adding unit; and a power supply unit for controlling a driving of the compressor by applying the added current to the compressor under a dependent state on the switching control signal.

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Gyeonggi-do, South Korea

Kyung-Bum Heo