DRIVING DEVICE FOR LINEAR COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a driving device for linear compressor to make a frequency thereof correspond to a resonance frequency of a mechanical system even when the spring constant of a gas spring is changed by a change of load condition and the like. SOLUTION: This device is provided with an inverter 102 for driving a motor winding 103 of the linear compressor for compressing refrigerant by reciprocating motion of a piston, an alternating current power source 100 on a primary side of the inverter 102, a phase detecting circuit 104 for detecting a difference in phase between voltage of the alternating current power source 100 and current passing through the motor winding 103 of the linear compressor, and a calculating controlling part 108 and a base drive circuit 106 for controlling driving frequency of the inverter 102 according to the difference of the phase detected by the phase detecting circuit 104. A resonance frequency of a mass system is thereby always maintained even against load change and highly efficient driving can be performed.