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This contribution discusses the automatic searching method of the optimal operating point of the wound rotor synchronous motors. As the optimum, the maximal torque per ampere is comprehended. The control features the Kalman filter as the torque estimator and a simple gradient descent method as the optimization solver. The method can be utilized with any motor thus the torque estimator isn't dependent...
Hybrid excited axial field flux-switching machine (HEAFFSM) is a novel hybrid excited flux-switching permanent magnet machine, which combines the advantages of the hybrid excited synchronous machine and axial field flux-switching permanent magnet machine. Based on the vector control method, a novel control strategy of stator-flux orientation for the HEAFFSM, which can operate in both flux-enhancing...
The modeling and control of a variable speed cascaded doubly fed induction generator feeding an isolated grid in aircraft application is presented. Despite the complexity of the generator an efficient controller can be elaborated based on the theory of a unified reference frame vector representation. An indirect decoupled vector control of terminal voltage is implemented using field orientation techniques...
The influence of cross coupling effect on the performance of the indirect rotor field oriented control (IFOC) for high power AC traction drives cannot be neglected due to the wide operation range, low switching frequency and so on. In this paper, the cross coupling problem between d and q axis current component in the IFOC scheme is discussed. An improved current regulation scheme is proposed based...
Paper presents a position control system capable of achieving the prescribed speed and position response, for drives with PMSM and a significant vibration mode. The controller is of cascade structure, comprising an inner speed control loop and an outer position control loop. The inner speed control system complies with principles of vector control and feedback linearisation. The outer position loop...
The Brushless Doubly-Fed Machine (BDFM), which removes the brush and slip ring, improves security and reliability. The BDFM is proposed to have a bright prospect as an AC drive system or variable-speed constant-frequency power generation system. Vector control is widely studied in the BDFM, but the information of rotor speed and position must be obtained. This paper presents speed sensorless vector...
In this paper, on the basis of vector control, Extended Kalman Filter (EKF) was employed to estimate stator winding resistance, rotor flux-linkage due to permanent magnet and temperature rise in stator winding and rotor magnet of AC PMSM. Identification model of different parameter was established in rotating reference frame and MATLAB/SIMULINK was used to do simulation experiments. The theoretical...
A method for obtaining natural variable model of induction machines (IM) is presented. The variables of the model are electromagnetic torque (Te), reactive torque (Tr), magnitude of rotor flux linkage (lambdar), magnitude of stator flux linkage (lambdas), and rotor speed (omegar). These variables do not change in any reference frame of transformation. The model obtained is expressed in a state-space...
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