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Ras-related protein M-Ras, also known as muscle RAS oncogene homolog and R-Ras3, is a protein that in humans is encoded by the MRAS gene on chromosome 3. It is ubiquitously expressed in many tissues and cell types. This protein functions as a signal transducer for a wide variety of signaling pathways, including those promoting neural and bone formation as well as tumor growth. The MRAS gene also contains one of 27 SNPs associated with increased risk of coronary artery disease.
A position sensorless control method for a segmented linear permanent magnet synchronous motor
PendingCN122268227AElectronic commutation motor controlAC motor controlReference modelingPermanent magnet synchronous motor
The application discloses a kind of winding segmentation linear permanent magnet synchronous motor's position sensorless control method, first according to the coupling relationship of two adjacent stator and rotor, establish double-section composite equivalent model;Then MRAS reference model and adjustable model are constructed based on composite equivalent model;Third, the LESO observer of the dq axis lumped disturbance formed by parameter drift, inverter nonlinear error and load disturbance is established;Further, the disturbance estimation value output by LESO is fed forward to the adjustable model of MRAS, and a composite equivalent model LESO-MRAS observer is formed;Finally, the speed and position estimation value output by the observer is used to realize closed-loop position sensorless control.The application can significantly weaken the influence of position-sensitive parameters on position sensorless control, improve the speed, position estimation accuracy and system disturbance robustness in the full stroke range, especially in the transition area between sections.
Owner:ZHEJIANG UNIV