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This paper presents a new direct torque control (DTC) method for doubly-fed induction generator (DFIG) based wind power generation system. The angle and magnitude of rotor voltage are controlled to achieve independent control of electromagnetic torque and reactive power respectively. Space vector modulation (SVM) is used to address the limitations, of variable switching frequency and torque ripple,...
This paper presents the speed control scheme of indirect vector controlled induction motor (IM) drive. PWM controlling scheme is based on Voltage source inverter type space vector pulse width modulation (SVPWM) and the Conventional-PI controller or Fuzzy-PI controller is employed in closed loop speed control. Decoupling of the stator current into torque and flux producing (d-q) current components...
This paper presents a closed loop vector control of an interior permanent magnet synchronous motor (IPMSM) drive incorporating two separate fuzzy logic controllers (FLCs). The first one is a Mamdani type FLC which minimizes the developed torque ripple by varying online the hysteresis band of the PWM current controller. The second one is an FLC based tuned proportional-integral (PI) controller where...
The aim of this paper is to present a new fuzzy control scheme for real time drive efficiency improvement by the adaptive flux reduction at light loads during steady states and by the optimum flux recovery during transient states. The optimum flux recovery instead of the rated flux does not sacrifice the drive dynamic response since the torque capacity remains the same and accelerates the search convergence...
This paper investigates modeling and simulation of dual-rotor permanent magnet synchronous motor. The emulated model of a novel DRPMSM is constructed based on MATLAB/Simulink. To test the correctness of the emulated motor model, Vector Control (VC) system and Space Vector PWM Control (SVPWM) system are used to simulate the model of the motor. The simulation results show the correctness of the model...
In this paper, three significant control methods for permanent magnet synchronous machine are presented. A new control method enjoys the advantages of vector control and direct torque control is proposed. This method avoids some of the implementation difficulties of either of the two control methods. The proposed control method using the same flux and torque estimators as for the basic DTC and the...
At present, vector control (VC) has been widely used in the interior permanent magnet synchronous motor (IPMSM). However, for the difference between direct and quadrature inductances and the difference of control characteristics between d-q axes current loop PI regulators, the dynamic decoupling can not be achieved, which affects the torque dynamic response and the quick startup of motor. For this...
The paper presents a dual closed-loop vector control system based on DSP for asynchronous motor which is a multi-variables, nonlinear, strong coupling and time-varying system and is difficult to determine precise mathematical model because of changes in motor parameters and load fluctuations in factors. Speed controller uses a parameters self-adjusting fuzzy controller and flux observer uses an improved...
A new velocity and torque control strategy based on the direct control of stator flux linkage is introduced due to the disadvantage of permanent magnet synchronous motor circuit vector control and traditional direct torque control. By controlling the trajectory of stator flux linkage vector, flux linkage and torque control are achieved, thus permanent switching frequency and small flux linkage pulse...
In view of the operation characters of permanent magnet synchronous motor (PMSM) for hybrid electric vehicle (HEV) application, efficiency optimization control strategy is needed to meet the demand of rapidity. A quick efficiency optimized vector control scheme is presented in this paper. In steady state, the initial value of d-axis current can be achieved in any constant speed and torque operating...
Base on the equivalent circuit of ship drive motor, the optimal running efficiency is deduced. With vector control technology the motor efficiency optimization control strategy and its application limit is given. Modeling in Saber, the paper compares efficiencies of efficiency optimization control with conventional vector control by simulation. It is validated that motor efficiency is improved. Dynamic...
A novel structure of backstepping control has been proposed for indirect field oriented control of induction motor drive. Voltage and current signals are usually contaminated with high frequency switching noises due to SVPWM inverter. The proposed structure avoids real time integration and its associated drift problems, which in practice are the source of generation of unwanted noise. These problems...
This paper presents an efficiency optimization control system which can be incorporated as an outer loop to a standard indirect vector speed control system for both AC and DC motor drives (i.e. Induction motor, Permanent Magnet Synchronous motor, Synchronous Reluctance motor and DC motor drives), when not operating at full load. The proposed control system adjusts the air-gap current space vector...
Sensorless field-oriented control of induction motors is widely used in high-performance applications. However, the decoupled control may be detuned due to the motor parameter variation and load torque disturbance. In this paper, a new fuzzy PI self-tuning robust speed controller with feedforward control of an adaptive disturbance observer is proposed for sensorless induction motor drives to ensure...
In this paper, a mathematical model of single side linear induction motor(SLIM) considering dynamic end effects is presented, the field oriented control(FOC) is implemented in which the end effect is compensated and the dynamic response is improved. A loss model of SLIM to consider the influence of primary leakage inductance is developed, in which the iron loss resistance is paralleled with primary...
In this paper, applying field orientation based on particle swarm optimization (PSO) controls the speed of two-asymmetrical windings induction motor. The maximum efficiency of the motor is obtained by the evaluation of optimal rotor flux at any operating point. In addition, the electro-magnetic torque is also improved while maintaining a fast dynamic response. In this research, a novel approach is...
This paper presents a novel current regulation algorithm for induction machines that enables maximum torque-per-ampere capability over the entire field-weakened region. The algorithm enables robust current regulation with maximum efficiency and torque capability despite significant variation in voltage source and machine parameters. The algorithm identifies when the current regulator begins to saturate...
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