Release Time:2022-06-26  Hits:

Date of Publication: 2008-01-01

Journal: 机械工程学报

Issue: 12

Page Number: 291-295

ISSN: 0577-6686

Abstract: In view of the noise magnification problem of the classic differentiator and the inherent error problem of low-pass filter, research on the application of tracking-differentiator (TD) in the stator flux estimate is made. Firstly, TD is brought in to pretreat the detected stator current in a bid to suppress noise, and then TD is used to extract the angular frequency information of stator current. On this basis, a programmable 3-stage cascaded LPF based stator flux estimation scheme is presented, in which the stator flux altitude and phase are compensated by optimizing the time constant and the gain constant of 3-stage cascaded LPF by stator current angular frequency. The simulation and experiment results verify the validity and superiority of the proposed scheme.

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