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This paper is concerned with two popular and powerful methods in electrical drive applications: fieldoriented control (FOC) and space vector modulation (SVM). The proposed FOC-SVM method is incorporated with a predictive current control (PCC)-based technique. The suggested method estimates the desirable electrical torque to track mechanical torque at a fixed speed operation of permanent magnet synchronous motor (PMSM). The estimated torque is used to calculate the reference current based on FOC. In order to improve the performance of the traditional SVM, a PCC method is established as a switching pattern modifier. Therefore, PCC-based SVM is employed to further minimize the torque ripples and transient response. The performance of the controller is evaluated in terms of torque and current ripple and transient response to step variations of the torque command. The proposed method has been verified with MATLAB-Simulink model. Simulation results confirm the ability of this technique in minimizing the torque and speed ripples and fixing switching frequency, simultaneously. However, it is sensitive to parameter changes.

This paper presents the EL modeling of the fourwire 3-level 3-phase NPC voltage source rectifier (VSR). The load current of the four-wire 3-level 3-phase could be expressed in two forms: the load current involving the current of capacitor C 1 , and the load current involving the current of capacitor C 2 . So that two EL models will be obtained for four-wire 3-level 3-phase NPC voltage source rectifier. The models are completely in accordance with kirchoffs circuit theory and superposition law of course. One of the rules is utilized to control the voltage of C 1 and the other is used to control the voltage of C 2 . Transforming the EL model from the abc reference frame to dq reference model will completely retain the energy dissipative properties of two models. Having drived the EL models, the control method combined with the techniques of the energy shaping and damping injection applied to the dq frame EL models of the converter. To study the output regulation problem of C 1 and C 2 , the voltage indirect control method has been applied to the passivity based controller. To regulate the internal dynamics of the output voltages of C 1 and C 2 an outer loop that consisting PI controller is added to both controller models. To verify the ability of the proposed control method different simulations have been carried out by MATLAM/SIMULINK software. The simulation results clarify the abilities of the new method such as: very low THD, unity power factor, decoupled current loop dynamics, low oscillation in the neutral point potential (NPP).