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This paper develops an appropriate predictive current controller (PCC) for fast torque monitoring and high-performance operation of a permanent-magnet synchronous motor (PMSM) drive involving constant switching frequency. The proposed controller is based on a convenient combination of deadbeat and direct predictive control (DPC) techniques. Its response is compared to that of a typical proportional–integral...
This paper describes a current control of the three-phase inverter in a stand-alone wind energy system using model predictive control (MPC). The system includes a wind turbine without the use of a gearbox, a permanent magnet synchronous generator (PMSG), a pure diode based three-phase rectifier and a three-phase voltage-source two-level inverter. The simulation results obtained by using MATLAB/Simulink...
High performance interior permanent magnet synchronous machines show nonlinear magnetics due to saturation and cross-coupling. Nonlinear differential equations describe these phenomena and make feedback control challenging. This paper presents a predictive control method to precisely control the dynamics of these machines. Four real-time capable strategies to online identify transient trajectories...
Interior permanent magnet machines have several advantages compared to permanent magnet synchronous machines having the magnets on the rotor surface. The drawback is the quite more complex control structure for energy efficient and stable operation of this machines. In a prior work, some current control structures have been discussed assuming the energy optimized current setpoints to be given. In...
The output voltage of an inverter is often assumed proportional to the drive modulation signal. However, in practice the inverter presents nonlinear characteristics that may significantly affect the output voltage, and this may be critical in the context of sensorless drives and parameter identification. Nowadays, several solutions exist to compensate for the nonlinear behaviour of the inverter. Nevertheless,...
This paper describes a fast torque control system of permanent magnet synchronous motor (PMSM) based on model predictive control (MPC) considering overmodulation region of inverter. In overmodulation region, output voltage of inverter contains harmonic voltage which influences performance of current control and can't be avoided. To consider influences of harmonic voltage, we use a harmonic voltage...
BLDC motors have been gaining attention from various industrial and household appliance manufacturers, because of its high efficiency, high power density and low maintenance cost. After many research and developments in the fields of magnetic materials and power electronics, their applications to electric drives have increased to a significant extent. In this paper, the modeling of Brushless DC motor...
Based on the d-q model of a permanent-magnet synchronous motor drive, analytical expressions are derived for the small-signal input admittance of the system, which allow the examination of negative input admittance related instabilities. A compensating function is added to the control system to eliminate the instability effects and the analytical models are used to establish a design procedure. Saber...
The goal of the field orientated control principle for inverter fed asynchronous machines, is to control the torque of the machine and the flux inside the machine independently from each other.
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