Method for monitoring a linear compressor

摘要

A method for monitoring a linear compressor is provided. The method includes determining a velocity dependent induced voltage in a driving coil of the linear compressor, extracting a higher order harmonic from the velocity dependent induced voltage, and establishing that a piston of the linear compressor is crashing if the higher order harmonic is greater than a reference value.

主权项

1. A method for monitoring a linear compressor, comprising:
measuring a current and a voltage though a driving coil of the linear compressor; determining a velocity dependent induced voltage in the driving coil based at least in part on the current and voltage through the driving coil; extracting a higher order harmonic from the velocity dependent induced voltage, extracting the higher order harmonic comprising
multiplying a signal of the velocity dependent induced voltage in the driving coil by a sinusoidal function having a frequency corresponding to the higher order harmonic andintegrating a product from said step of multiplying over a period of a fundamental frequency of the signal of the velocity dependent induced voltage in the driving coil; and establishing that a piston of the linear compressor is crashing if the higher order harmonic is greater than a reference value.