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As the main power source of the industrial system, the control accuracy of a motor directly affects the efficient operation of the system. In this paper, an adaptive control strategy based on disturbance observer is proposed for a Permanent Magnet Synchronous Motor (PMSM) with multiple disturbances. Firstly, the multiple disturbances in a PMSM are divided into the modeled load and the norm bounded...
In the actual permanent magnet synchronous motor servo system, the load changes is a major factor that affects system performance. In this paper, a PMSM vector control system model is estabLished in Matlab/SimuLink environment. By adjusting the parameters of controller, simulation and analysis are done on the load changes that may appear. The results demonstrate that the system is stable, with good...
A new structure of three degree-of-freedom (3-DOF) spherical motor is presented. The magnetic field of the spherical motor is analyzed by equivalence current method. The torque model of the spherical motor is built according to the interaction of one permanent magnetic (PM) with one electromagnet (EM) derived by Lorentz force method (LFM). The motion singularity is analyzed and the condition number...
It is a hot topic that an extended Kalman filter (EKF) is used as speed and position observer in sensorless control of permanent magnet synchronous motor (PMSM). However, the choice of the EKF covariance matrices is still an unsolved problem as the EKF is applied in sensorless drives. In this paper, the parameters of the covariance matrices are tuned based on ant colony algorithm (ACA). The simulation...
The current regulation based on the internal model control is applied to vector control of PMSM. It avoids the adjustment of two PI-parameters; moreover the IMC structure improves the characteristic of the current loop. Generally, the flux of PMSM is changing with the load current (torque). Simulation results under flux saturation considered and not considered show that the current internal model...
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