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A fifth and seventh order harmonic elimination scheme for IM drive with a multilevel dodecagonal voltage space vector structure using a single DC source is proposed in this work. Single DC source requirement makes four quadrant operation of the drive system simpler compared to the multilevel do-decagonal structures presented in literatures before. The space vector structure consists of six concentric...
This paper deals with measurement and evaluation of electromagnetic noise generated by induction electric motor fed by inverter controlled by PWM. It suggests and describes possible method of evaluation the electromagnetic noise which can be used in real-time applications.
In this paper, the normally-on type bidirectional switch, in which is comprised of normally-on and normally-off switching devices is proposed for one of a protection method of the Matrix Converter (MC). A diode clamp circuit or auxiliary protection circuits have to keep inductive load current loop in a MC utilized a bidirectional switch when the MC becomes gate block situation under abnormal conditions...
To reduce energy consumption, a novel motor system was proposed using two individual current control technologies involving (1) a multiphase inverter and (2) a single-phase inverter. The multiphase inverter technology comprised two sets of three-phase windings connecting two three-phase inverters. Each set of coils connecting the three-phase inverters formed a rotating field. The two windings allowed...
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.
In this paper, aimed at the neutral-point potential unbalance of the three-level neutral point clamped inverter, an improved new control scheme about neutral-point potential balance was proposed and a simplified direct torque prediction scheme was used for induction motor fed by three-level inverter. Firstly, stator voltage vectors to be applied at the next time was preselected by the torque prediction...
The fast growth in the power electronic technology has brought the dramatic change in, industrial, commercial, domestic and wind power generation fields by developing statically controllable speed slip power recovery drives having better efficiency, better dynamic performance, compact size and lower cost. The rotor side control of wound rotor induction motor drive is achieved by three control techniques...
The effect of inverter dead-time on the inverter output voltage is well studied in literature. This paper studies the effect of the dead-time on the inverter input current, and includes this effect in the dc link dynamic model of a diode-bridge-rectifier (DBR) fed voltage source inverter (VSI). Based on this study, this paper proposes a dynamic model of a rectifier-inverter-fed induction motor, that...
This paper deals with the diagnosis of the electrical faults of induction motor operating under the direct field-oriented control. Two different faults are taken into account: stator winding inter-turn short circuit and voltage source inverter transistor damage. The fault diagnostic algorithms are described. Performance of both algorithms is validated in presence of the different kind of damages....
This paper presents a current harmonic injection method to reduce harmonics from induction motor drive. Now a days many industries using variable frequency drives for induction motor. These VFD generates different harmonics which causes heating of motor, introduction of EMI, malfunctioning of measuring equipment. Harmonic distortion largely occur where loads withdrawn non sinusoidal current from system...
The variable frequency has important usage in the industrial world. The electricity produced from the generating station are normally 50Hz and these frequency is not applicable for most of the application. There are some electrical devices which need variable frequency than the fixed supply frequency. The induction motors are one of the best example for variable frequency drives. The induction motors...
The paper presents an indirect vector control of induction motor fed by three-level diode clamped inverter and is implemented using fuzzy logic speed control system based on fuzzy logic approach at different operating conditions to obtain improved performance. The analysis, design and simulation using MATLAB for indirect vector control of induction motor are carried out based on fuzzy set theory....
This paper proposes a discontinuous pulse width modulation (DPWM) method for an indirect matrix converter (IMC) driving induction motor (IM) in order to reduce switching losses. The IMC has advantages that long lifetime and reduced volume depending on the lack of capacitors. However, the IMC has many electric switching devices because it is composed of two stages such as a rectifier stage and an inverter...
This paper illustrates the method of speed control of three phase Induction motor using V/F control method which is fed through the direct matrix converter. To make the input power factor unity, the rectifier side of the direct matrix converter is controlled through GSPWM technique. The main advantage of using the direct matrix converter is that the dc-link storage is removed in the proposed one which...
This paper presents the hypersynchronous converter cascade with intermediate DC-link scheme and one of the easiest and most reliable ways to control valves dependent on the rotary transducer rotor flux current. The equations explaining the regulation principle and the basic expression for calculating the hypersynchronous converter cascade static characteristics are presented. The design and control...
One of the important issues of modern vacuum circuit breakers application is switching a group of induction motors. When switching from inverter-based power supply to direct power supply from the network, over-voltages and inrush currents having an adverse effect on power equipment are possible. This paper suggests a solution using a controlled vacuum circuit breaker. Controlled vacuum circuit breaker...
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.
SIMULINK implementation of an artificial neural network (ANN) based Direct Torque Control (DTC) of Induction Motor Drive is presented in this paper. DTC is one of the most advanced control methods. Using DTC, an induction motor is driven by an inverter whose switching pattern is determined by the errors in the reference and estimated values of the machine flux and torque. To optimize the performance...
This paper is devoted to the study and the simulate a five level inverter NPC for induction motor drive. To improve the preference of this inverter, the control strategy adopted is the PWM pulse with modulation. Several simulations were proposed by changing the PWM parameters m and r. To study the FFT harmonic spectrum several curves are plotted of the current, voltage and the calculation of THD distortions...
Random PWM techniques have been employed in most of the industrial drive applications. Sinusoidal Pulse Width Modulation (SPWM) techniques for AC drives have been developed in the early 1990s, but they failed to yield acceptable level of fundamental voltage. Acoustic noise is found to be more in SPWM. To overcome the drawbacks, Random Pulse Width Modulation (RPWM) techniques are introduced. This paper...
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