Apparatus and method for controlling operation of compressor

Details Apparatus and method for controlling operation of compressor Apparatus and method for controlling operation of compressor

2005-01-11

2009-12-08

Kramer, Devon C (Department: 3746)

Pumps

Motor driven

Electric or magnetic motor

C417S053000, C417S044110

Reexamination Certificate

active

07628591

ABSTRACT:
An apparatus for controlling a compressor includes a stroke calculator for calculating a stroke estimate value of a compressor based on a value of a current applied to a motor of the compressor and a value of a voltage applied to the motor of the compressor; an operation frequency reference determining unit for integrating the stroke estimate value to output an integrated stroke value, detecting a mechanical resonance frequency of the compressor based on the integrated stroke estimate value and the current value, and determining the detected mechanical resonance frequency as an operation frequency reference value; and a controller for varying a current operation frequency of the compressor according to the determined operation frequency reference value.

REFERENCES:
patent: 4706470 (1987-11-01), Akazawa et al.
patent: 6075671 (2000-06-01), Yoneda et al.
patent: 6644943 (2003-11-01), Lilie et al.
patent: 2003/0026702 (2003-02-01), Yoo et al.
patent: 2003/0143080 (2003-07-01), Yoo et al.

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