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BEARING SYSTEM FOR DEVELOPMENT DRILLING GAS COMPRESSOR AND DEVELOPMENT DRILLING GAS COMPRESSION SYSTEM, AND MAGNETIC BEARING CONTROL METHOD FOR DEVELOPMENT DRILLING GAS COMPRESSOR
BEARING SYSTEM FOR DEVELOPMENT DRILLING GAS COMPRESSOR AND DEVELOPMENT DRILLING GAS COMPRESSION SYSTEM, AND MAGNETIC BEARING CONTROL METHOD FOR DEVELOPMENT DRILLING GAS COMPRESSOR
PROBLEM TO BE SOLVED: To provide a bearing system for development drilling gas compressor showing a superior tracking characteristic in control of a magnetic bearing.;SOLUTION: A bearing system for a development drilling gas compressor is a bearing system for a compressor for increasing pressure of development drilling gas. The system comprises a thrust magnetic bearing including a magnetic force generating part for acting magnetic force against a thrust collar arranged at a rotating shaft of the compressor, a displacement sensor for detecting a relative displacement between the thrust magnetic bearing and the rotating shaft and a controller for controlling the magnetic force generating part to adjust the magnetic force on the basis of a result of detection of the displacement sensor. The controller includes an instruction value calculating part for calculating a feedback instruction value on the basis of a deflection between the result of detection by the displacement sensor and the target value of the relative displacement and a correction amount calculating part for calculating a correction value of the feedback instruction value on the basis of state quantity of the development drilling gas at an inlet upstream side of the compressor.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT
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