Power saving type compressor and refrigerator with the same and method for controlling the same

A power saving type compressor comprising:

• a main winding and a sub-winding connected with a common terminal at one sides thereof;
• a main terminal and a sub-terminal at the other sides of the main winding and the sub-winding;
• a PTC unit having one side terminal connected to the sub-terminal for making a starting torque greater in operation of the compressor;
• and
• a PTC switching unit between the other side terminal of the PTC unit and the main terminal, for making selective switching on/off of a power input to the PTC unit.

A method for controlling a refrigerator including a power saving type compressor having a PTC unit for making a starting torque greater at the time of operation of the compressor, and a PTC switching unit for making selective turning on/off of a power input to the PTC unit, comprising the steps of:

• turning on a power supply switching unit in response to a signal for driving the compressor according to an operation mode of the refrigerator, to start the compressor;
• counting a time period passed from the start of the operation of the compressor, to determined whether a preset time period is passed;
• turning off the PTC switching unit to cut off power consumed at the PTC unit if it is determined that the preset time period is passed;
• keeping the operation in a state the power input to the PTC unit is cut off;
• and
• turning off the power supply switching unit of the compressor upon reception of a signal for turning off the compressor, to finish operation of the compressor.