A sensor phase compensation device, method and magnetic levitation system

Abstract

The invention discloses a sensor phase compensation device, method and magnetic levitation system. In the device, a first sensor and a second sensor are located at a group of diagonal positions of a rotating shaft in the magnetic levitation system; the first sensor can output a first acquisition signal; a second sensor capable of outputting a second acquisition signal; a phase adjustment unit configured to determine the phase difference between the first acquisition signal and the second acquisition signal, and perform phase adjustment on the phase difference to Phase compensation is performed for the lead or lag of the phase difference, so that the phases of the first acquisition signal and the second acquisition signal are consistent. In this scheme, in the magnetic suspension bearing control, by compensating the phase difference of the sine wave signals of the two sensors, the accuracy of the detected position signal of the rotating shaft can be improved, thereby improving the suspension stability of the shaft.

Description

technical field [0001] The invention belongs to the technical field of magnetic levitation systems, and in particular relates to a phase compensation device, method and magnetic levitation system of a sensor, especially a phase compensation sensor (such as an eddy current sensor), in particular to a phase compensation circuit of an eddy current sensor, a magnetic levitation system and its The phase compensation method of the sensor. Background technique [0002] In the magnetic suspension bearing control, the voltage signal of the shaft displacement can be obtained by using the difference of the sine wave signal of two sensors. However, when there is a phase difference between the sine wave signals of the two sensors, the position signals of the rotating shaft detected by the two sensors are inaccurate, which affects the suspension stability of the central shaft controlled by the magnetic bearing. [0003] The above content is only used to assist in understanding the techni...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a sensor phase compensation device, method and magnetic levitation system to solve the problem of inaccurate position signal of the detected rotating shaft when there is a phase difference between the two sensor sine wave signals in the control of the magnetic levitation bearing. The problem of affecting the suspension stability of the shaft is to achieve the effect of phase compensation for the phase difference of the sine wave signals of the two sensors to improve the accuracy of the detected position signal of the rotating shaft and thus improve the suspension stability of the shaft

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