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On the basis of establishing mathematical model of induction machine, the simplifying assumption of two-dimensional plane finite element model was proposed, and Dirichlet and main boundary conditions were defined. The speed governing of induction machine was realized using back-to-back voltage-fed frequency converter. The continuous output direct voltage value of three-phase non-controlled rectifier...
The paper presents a complete solution for speed sensorless control system for five-phase induction motor with voltage inverter, LC filter and nonlinear control of combined fundamental and third harmonic flux distribution. The control principle, also known as multiscalar control, nonlinear control or natural variables control, is based on a use of properly selected scalar variables in control feedback...
The polyphase induction motor is the most widely used ac motor because of its numerous advantages like low in cost, simple & rugged construction, absence of commutator and good operation. In the recent past Multilevel inverter technology has emerged as very important alternative in the area of high power, medium voltage control. By using these inverters we can change the frequency levels of induction...
A novel firefly optimized algorithm is proposed in this paper, it used to get optimized parameters of PID for indirect vector control in induction motor drive system. Compare with conventional PID and genetic optimization algorithm, the simulation results show that the proposed method has excellent dynamic and static performance.
This paper presents an application of Direct Torque Control (DTC) drive scheme for a photovoltaic water pumping system. The photovoltaic panel is used to supply the inverter feeding the induction motor used to drive the water pump. The pumping system studied is presented and developed under Matlab/Simulink environment and results of simulation show high performances of the proposed model.
AC drives based on full digital control have reached the status of a maturing technology in a broad range of applications, ranging from low-cost to high performance systems. In the field of the drive of the electric machines, the elimination of the mechanical speed sensor can present an economic interest and improve safety of operation. With speed estimation, sensorless vector control is possible,...
The paper deals with steady state analysis of electromagnetic torque ripples of a three-phase induction machine, which is supplied by an IGBT transistors bridge connected inverter. The inverters output voltage is controlled by PWM from the input DC voltage. The complex Fourier series analysis of the inverter output voltage was made, in order a spectrum of the harmonic supply voltages. The different...
This paper aims to provide a robust control system for an induction motor (IM) used in electric vehicle (EV). A digital RST controller is designed to reduce response time without overshoot speed. High-dynamic performance is obtained by using the indirect stator-flux-oriented control (ISFOC) and the space vector pulse width modulation (SVPWM). In this paper, a three level neutral-point-clamped (NPC)...
Induction motors are the workhorses of industries. The two viable speed control schemes for the induction motor are V/f and indirect field oriented control (IFOC) technique. The voltage source inverter is the conventional power converter employed in the drive scheme. Recently, in medium power applications the multilevel inverters (MLI) are gaining more attention due to their high performance. In this...
By principle, Direct Torque Control (DTC) is used to adjust stator flux and electromagnetic torque. Simple structure and very good dynamic behavior are main features of DTC. However classical DTC has some disadvantages, the most important of them is the high ripple torque. In this paper we propose some variety of DTC combined with FOC structures. Hysteresis controllers and switching table are replaced...
This paper presents a high performance Direct Torque Control (DTC) theme for the induction motor using Indirect Matrix Converter (IMC). To improve the dynamic behavior of motor, Active Learning Method (ALM) is implemented on the DTC. The ALM uses its own modeling technique called the ink drop spread (IDS) method. Functionally the IMC is very similar to the Direct Matrix Converter (DMC) but it has...
Based on the theory of the mathematical model of induction motor, the model of induction motor vector control is proposed with the simulation toolkit of Matlab/Simulink, and the related sub-system modules are described in detail and the specific illustrations of the sub-system are also given. Take a simulation of the system, the results such as the waveforms of the current, speed and so on could be...
Switching Table based Direct Torque Control (ST-DTC) appears as a promising control technique to be applied to power converters in the industry. However, the ST-DTC presents some drawbacks as non constant switching frequency and high torque ripples. This work proposes a DTC schemes for an induction motor fed by three-level voltage source inverter (VSI), neutral point clamped topology (NPC), with constant...
This paper presents a high performance direct torque control (DTC) theme for the induction motor (IM). To solve those problems associated with conventional DTC, such as flux and torque ripple, variable switching frequency, inaccuracy in motor model and other parts of system. The Active Learning Method (ALM) is implemented on the DTC. In the Active Learning Method for information modeling, a method...
Direct torque control (DTC) has the characters such as combined simplicity and robustness with excellent performance of torque control for the drive system. A DTC technique for drive system fed on three-level inverter and induction motor is presented, which means to select and compose right voltage vectors varying from speed working inconstant torque area . The mathematic and simulation models of...
Small displacement equations valid for small excursions about an operating point are established from the machine equations expressed in synchronously rotating reference frame. The conventional form of d-q model used for drive simulation has limitations in predicting the machine performance. It is possible that, accurate results for fundamental component of current and average torque near rated operating...
This paper will present a test bench to verify the reliability of new prototypes of inverter for electric motor in the hybrid vehicle. These inverters must be tested in the same conditions as in real vehicle. A 22 kW induction motor has been used, coupled with a DC motor in order to impose the load torque. We have implemented various mission profiles ( European ARTEMIS cycles) of load torque on the...
In electrical engineering education, modelling and dynamic simulation represent tools in order to understand the behaviour of the different components of electric drive- systems in transitory regimes. In this paper the direct, three steps rheostat, six pulses and PWM inverter starting of induction motor are simulated. The permanent magnet synchronous motor is modeled and starting also with PWM inverter...
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