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AssigneeSoutheast University
InventorsWei HUA, Yuchen WANG, Kai LIU, Chao ZHANG
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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 N1 slots in a unified direction; N1 is an even number, and N1≠ks/(2p); a third linear Hall sensor is spaced apart from the first linear Hall sensor by N2 slots; N2 is an odd number, and N2=(2k−1)s/(2p); and a fourth linear Hall sensor is spaced apart from the second linear Hall sensor by N2 slots; and then calculating an electric motor rotor angle according to voltage signals of the four linear Hall sensors.
A method for measuring a flux-switching electric motor rotor angle on basis of linear Hall, a first linear Hall element, a second linear Hall element, a third linear Hall element and a fourth linear Hall element are mounted in sequence in slots of four stators of a flux-switching electric motor upon a principle that output signals between the first linear Hall element and the third linear Hall element are in phase and output signals between the second linear Hall element and the fourth linear Hall element are in phase, two sets of in-phase output signals are superimposed separately to obtain a pair of sinusoidal signals, a linear combination of the pair of sinusoidal signals is performed to obtain a pair of quadrature signals in a two-phase stationary coordinate system, and a closed-loop control is performed on the pair of quadrature signals in the two-phase stationary coordinate system according to an estimate of a rotor angle.
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