Apparatus and method for controlling driving of reciprocating compressor for refrigerator using linear motor

An apparatus for controlling a driving of a reciprocating compressor for a refrigerator using a linear motor, in a reciprocating compressor for a refrigerator which controls a cooling capacity by varying stroke of a piston reciprocating up and down by a voltage applied to the inner motor according to on/off of triac, the apparatus comprising:

• a first capacitor connected to the motor;
• a second capacitor connected to the first capacitor in parallel;
• a relay connected to the second capacitor in series to be turned on/off;
• and
• a microcomputer for outputting a control signal to turn on/off the relay according to a driving load of the refrigerator, wherein a series combination between the first and second capacitors is set to attenuate inductance of a coil wound to the motor.

An apparatus for controlling a driving of a reciprocating compressor for a refrigerator using a linear motor, in a reciprocating compressor for a refrigerator which controls a cooling capacity by varying a stroke according to a voltage applied to the inner motor, the apparatus comprising:

• a microcomputer for outputting a control signal according to a driving load of the refrigerator;
• an electric circuit unit for controlling the voltage applied to the motor by varying capacitance according to the control signal of the microcomputer;
• and
• a reciprocating compressor for controlling a cooling capacity by varying stroke according to the control voltage applied from the electric circuit unit.

A method for controlling a driving of a reciprocating compressor for a refrigerator using a linear motor, in a reciprocating compressor for a refrigerator which controls a cooling capacity by varying stroke of a piston reciprocating up and down by a voltage applied to the inner motor according to on/off of a triac, the apparatus comprises a first capacitor for attenuating inductance of a coil wound on the motor;

• a second capacitor connected to the first capacitor in parallel;
• and a relay connected to the second capacitor in series to be turned on/off:, wherein the method comprising the steps of:
• detecting an off time of the triac;
• determining whether a driving load of the refrigerator is great or small by the detected off time of the triac;
• and
• outputting a control signal for turning on the relay in case of when the driving load of the refrigerator is small as a result of the determination, and outputting a control signal for turning off the relay in case of when a driving load of the refrigerator is great.

A method for controlling a driving of a reciprocating compressor for a refrigerator using a linear motor, in a reciprocating compressor for a refrigerator which controls a cooling capacity by varying stroke of a piston reciprocating up and down by a voltage applied to the inner motor according to on/off of triac, the apparatus comprises a first capacitor connected to the motor;

• a second capacitor connected to the first capacitor in series;
• and a relay connected to the second capacitor in parallel to be turned on/off:, wherein a series combination between the first and second capacitors is set to attenuate inductance of a coil wound on the motor, the method comprising the steps of:
• detecting an off time of the triac;
• determining whether a driving load of the refrigerator is great or small by the detected off time of the triac;
• and
• outputting a control signal for turning on the relay in case of when the driving load of the refrigerator is small as a result of the determination, and outputting the control signal for turning off the relay in case of when a driving load of the refrigerator is great.