Device and method for controlling running of compressor of linear motor

Abstract

An apparatus and a method for controlling operation of a linear motor compressor, by which a linear motor compressor can operate always in an optimum condition by coping with the load variation due to changes in a refrigerator and the circumstances. In more detail, a current peak value at TDC=0 is detected by comparing a current applied to the linear motor compressor with a formerly detected current, and accordingly the linear motor compressor is operated by a switching control signal generated according to a duty-ratio corresponding to the current peak value.

Description

technical field [0001] The present invention relates to a linear motor compressor, and more particularly, to a device and method for controlling the operation of the linear motor compressor, which enables the linear motor compressor to operate under optimum conditions. Background technique [0002] In general, linear motor compressors have low frictional losses by eliminating the use of a crankshaft that converts rotation to linear motion, so linear motor compressors are superior to general compressors in terms of compression efficiency. [0003] When a linear motor compressor is used in a refrigerator or an air conditioner, the refrigeration capacity of the refrigerator and the air conditioner can be controlled by changing the compression ratio of the linear motor compressor by changing the stroke voltage applied to the linear motor compressor. The following will refer to figure 1 Describes a linear motor compressor. [0004] figure 1 is a schem...

AI Technical Summary

Problems solved by technology

[0010] However, since the linear motor compressor control device according to the related art controls the operation of the linear motor compressor by comparing the calculated stroke with the stroke reference value and outputting a switching control signal to the power supply unit according to the comparison result, the linear motor Compressor operation cannot be accurately controlled

In more detail, since the linear motor compressor control device according to the prior art has severe nonlinearity in its mechanical motion function, the operation of the linear motor compressor cannot be accurately performed by the linear control method without taking into account the nonlinearity

[0011] In addition, in the linear motor compressor control device according to the prior art, when the linear motor compressor continues to operate according to the initially detected switch control signal, the position of the piston may vary due to changes in the refrigerator and other conditions. Deviation from TDC (Top Dead Center, top dead center) = 0

Images