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This paper firstly introduces the mathematical equations of PMSM (permanent magnet synchronous motor), an overview of direct torque control (DTC) and a DTC based on sliding mode control for PMSM, and then builds PMSM control system simulation models with above two methods in MATLAB /Simulink environment. Finally, we got the starting response, torque ripple and load perturbation responses of DTC and...
This paper presents a generalized d-q model of multiphase (six-phase) induction motor in Matlab/Simulink. Further, to observe the advantages of six-phase induction motor over conventional three-phase counterpart, a comparative analysis is performed under similar conditions. It has been observed that the six-phase induction motor have several advantages over conventional three-phase counterpart, such...
This paper deals with the analytical description of an interior permanent magnet synchronous motor running in six-step conduction mode. It assumes a non-sinusoidal back emf, but inductances vary sinusoidally with the rotor position. The proposed model renounces Park's transformation and delivers a set of equations which allow the numerical simulation of phase currents and torque in the abc reference...
Control system designed for a.c. drives with a significant torsion vibration mode and applied to PMSM, which takes into account damping factor is described. Derived control algorithms for speed and position control are based on forced dynamics principles and achieve prescribed speed and position responses. Inner speed control loop complies with principles of vector control. Outer position control...
In this paper, a direct load angle (DLA) control method for three phase induction motor drives is proposed. It is based on control of incremental change in load angle. This method offers constant switching frequency at different operating conditions. The torque control is achieved without losing the benefits of direct torque control (DTC) by reference stator flux angle, which is sum of load angle...
A general simulation model of the line-start single-phase capacitor-start, capacitor-run permanent-magnet motor (LSSPPM) is constructed by using Simulink in MATLAB according to the analysis of its mathematical model. A user-friendly interactive man-machine interface is designed after masking the model. Finally, the validity of the simulation model is tested and verified via a simulation experiment.
This paper presents a new maximum torque per ampere (MTPA) control strategy for sensorless V/f controlled PMSM drives. The proposed theoretical basis can be applied to both surface permanent magnet synchronous motor (SPMSM) and interior permanent magnet synchronous motor (IPMSM) drives to obtain high efficiency. Two closed loops are required in the proposed drive. First, by using the oscillatory active...
In this paper, a simple and effective algorithm for direct torque and flux control three phase induction motor drive is proposed. In this method, control technique is based on decouple between amplitude and angle of reference stator flux for determining required stator voltage vector. This proposed method eliminates the estimation of stator flux angle to generate stator voltage vector with constant...
It is a known fact, that three-dimensional FE-Simulations are very slow, which prevents their usability in larger system models. In this paper, a Matlab/Simulink model for a TFM is developed to enable fast simulations of complete drive systems with power converters and other components. The model is derived by incorporating precomputed FEM data into a Matlab function, thereby allowing a 4.2 million...
The paper presents comparison of two control techniques (a) sliding mode and (b) forced dynamics for control of electric drives employing permanent magnet synchronous motors with flexible coupling. The designed controllers are of the cascade structure, comprising an inner speed control loop and an outer position control loop. The inner speed control loop for both controllers is based on forced dynamics...
New concepts are proposed for the design, optimization and control of doubly-salient permanent-magnet machine (DSPM). A uniform pole-width is employed in which the width of rotor pole is designed to be the same as that of the stator salient pole. This design is targeted to minimum the cogging torque. Secondly, a skewed rotor at one half of pole width is used to improve the commutation. Lastly, based...
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