Surge detection of magnetic suspension fluid machinery based on rotor axial displacement signal and normalized second-order generalized integrator-frequency locked loop with prefilter

Author:

Guan Xudong1ORCID,Zhou Jin2ORCID,Jin Chaowu2ORCID,Lin Yingzhe3

Affiliation:

1. School of Mechanical Engineering and Rail Transit, Changzhou University, China

2. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, China

3. Research and Development Department, Nanjing CIGU Limited Corporation, China

Abstract

A surge detection method according to rotor axial displacement signal and normalized second-order generalized integrator-frequency locked loop with prefilter (SOGI-FLL-WPF) is proposed to solve the surge detection problem of magnetic suspension fluid machinery, which has important practical significance. To improve the anti-disturbance performance of surge detection, SOGI is introduced as a prefilter. As a prefilter, SOGI can eliminate the interference in the surge signal, and normalized SOGI-FLL can estimate the amplitude and frequency of the surge signal. Normalized SOGI-FLL and prefilter are combined to form normalized SOGI-FLL-WPF. First, the disturbance transfer model between rotor axial displacement signal and pressure signal is deduced. Then, the surge is detected by normalized SOGI-FLL-WPF. This method has the merit of fast response, small computation, and good disturbance resistance without additional detection units. Finally, the test is implemented on 105 kW and 150 kW magnetic suspension blowers. The results demonstrate that the proposed method can quickly detect surge signal after the surge occurs.

Funder

Research Foundation for Advanced Talents

National Natural Science Foundation of China

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Aerospace Engineering,Automotive Engineering,General Materials Science

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