Patent ID: 7845912

Claim:
A driving controlling apparatus for a linear compressor, comprising: a current detecting unit for detecting a current of a motor of the linear compressor; a voltage detecting unit for detecting a voltage of the motor of the linear compressor; a stroke detecting unit for calculating a stroke using the detected current and the detected voltage; and a controlling unit for determining an overload state based on a comparison result between a reference phase difference and a phase difference between the detected current and the calculated stroke, and the controlling unit controlling a voltage or a current applied to a linear motor based on the determining result, wherein when the phase difference between the detected current and the calculated stroke is smaller than the reference phase difference, the controlling unit determines an overload state to thus implement a voltage control mode, and when the phase difference between the detected current and the calculated stroke is larger than the reference phase difference, the controlling unit determines a normal load state to thus implement a current control mode, and wherein in the current control mode, when the stroke is consistent with a stroke command value, the controlling unit maintains the current applied to the linear motor, when the stroke is larger than the stroke command value, the controlling unit decreases the current applied to the linear motor, and when the stroke is smaller than the stroke command value, the controlling unit continuously increases the current applied to the linear motor.