Southeast University

Yuchen Wang

Kai Liu

Chao Zhang

Wei Hua

A linear Hall-based eccentricity diagnosis method and detection system for a permanent magnet motor. First, three linear Hall elements are mounted in stator slots at the same space interval, respectively; second, analog signals output by the three-phase linear Hall are converted into digital signals by means of a digital signal processor, and the digital signals are converted into a quadrature signal by means of linear combination; then, a negative sequence signal and a sideband signal are extracted from the quadrature signal by means of a complex factor filter; then the amplitude of the negative sequence signal and the amplitude of the sideband signal are extracted by means of synchronous reference frame phase-locked loops as a static eccentricity indicator and a dynamic eccentricity indicator; finally, percentages representing the degrees of eccentricity are calculated from the static eccentricity indicator and the dynamic eccentricity indicator in the digital signal processor.

Linear hall-based eccentricity diagnosis method and detection system for permanent magnet motor

Disclosed are a method and system for measuring a flux-switching electric motor rotor angle on the basis of linear Hall. The method comprises: firstly, selecting four linear Hall sensors and respectively mounting same in four slots of a stator; a first linear Hall sensor is mounted in any slot of the stator, and a second linear Hall sensor is spaced apart from the first linear Hall sensor by Nslots in a unified direction; Nis an even number, and N≠ks/(2); a third linear Hall sensor is spaced apart from the first linear Hall sensor by Nslots; Nis an odd number, and N=(2−1)s/(2); and a fourth linear Hall sensor is spaced apart from the second linear Hall sensor by Nslots; and then calculating an electric motor rotor angle according to voltage signals of the four linear Hall sensors.

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Jiangsu, China

Yuchen Wang