Displacement correcting device, magnetic suspension bearing system and displacement correcting method thereof

Abstract

The invention discloses a displacement correcting device, a magnetic suspension bearing system and a displacement correcting method thereof. The displacement correcting device comprises a reference circuit and a correcting circuit, wherein the reference circuit is used for providing a reference signal, and the correcting circuit is used, based on the reference signal, for performing logarithm operations on to-be-corrected nonlinear displacement signals to obtain corrected linear displacement signals. According to the scheme, the problem of poor detection accuracy caused by the fact that position detection signals output by eddy current sensors are not in linear relation with displacement signals of shafts is solved and the effect of improving the detection accuracy is achieved.

Description

technical field [0001] The invention belongs to the technical field of magnetic suspension, and in particular relates to a displacement correction device, a magnetic suspension bearing system and a displacement correction method thereof, in particular to a linear correction circuit for an eddy current displacement sensor, a magnetic suspension bearing system with the linear correction circuit and a displacement correction method thereof . Background technique [0002] In the magnetic suspension bearing system, to realize the stable suspension of the shaft, a precise position sensor is required to detect the position of the shaft in real time. According to the needs of the magnetic levitation system, there are higher requirements for the linearity and resolution of the position sensor. A common sensor is an eddy current displacement sensor. [0003] The eddy current sensor has high resolution, but the linear range is insufficient. In the magnetic suspension bearing system,...

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Problems solved by technology

[0005] The object of the present invention is to, in view of the above defects, provide a displacement correction device, a magnetic suspension bearing system and a displacement correction method thereof, so as to solve the problem that the position detection signal output by the eddy current sensor and the displacement signal of the shaft are not linearly related, resulting in poor detection accuracy problem, to achieve the effect of improving the detection accuracy

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