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In this paper the three level diode clamped multilevel inverter fed direct torque control of induction motor is proposed. The proposed multilevel inverter has the advantages of less harmonics in the output and low torque ripples. The switching table direct torque control scheme is adopted due to the simplicity of the control algorithm. The PI speed controller is used in the outer loop. To demonstrate...
This article proposes a topology of induction motor drive system integrating a push-pull converter and a three-phase inverter using a single solar photovoltaic panel. To match impedance between the solar panel and motor load and to step-up the panel voltage, a dc-dc Push-Pull topology is employed. To obtain optimum motor performance and to reduce total harmonic distortion of the inverter output waveform,...
This paper presents research works in the topics of fault analysis and fault tolerant control of an electric vehicle powered by an inverter-fed induction motor drive and the usual sensors. The considered failures are mainly measurement error due to faulty sensors and power inverter malfunctions. When sensor failure occurs, both software and hardware redundancies have been investigated. Software redundancy...
Multilevel inverter technology has emerged recently as a very important in the area of high-power mediumvoltage energy control, with the added advantages of lower THD, lower electromagnetic interference (EMI) and lower dv/dt stresses in output. A new topology of a cascaded multilevel inverter is proposed in this paper that utilizes only eight but the conventional topology has twelve switches for the...
This paper is to compare the DTC applied to an induction motor fed by two-level voltage inverters and a three level voltage inverters, and to demonstrate the great advantages of using a three-level inverters type NPC. The speed control is realised by using a PI controler. The effectiveness of this approach is shows by simulation results using Power System Blocset (PSB) of Matlab / Simulink.
A closed loop speed control of z source converter fed induction motor drive with peak dc link voltage control is proposed here. Induction motor control is based on closed loop scalar control strategy. It can overcome the limitations of voltage source inverter and can offer better speed control and drive operation during voltage sags and normal working conditions. The peak dc link voltage employed...
Microgrid concept provides an appropriate context for installing distributed generation resources and providing reliability and power quality for sensitive loads. Most of the literature have analyzed the effects of different power control strategies of inverter-based distributed energy resources on the stability of microgrids and only a few of them have addressed various load models in their formulation...
Microgrids (MG) are distribution systems that contain Dispersed Generations (DGs), Energy Storage Systems (ESS) and loads. Voltage source inverters are commonly used to connect the generation units to the MG. The demand active and reactive power of the MG is dispatched through these inverters. Without using any controller, an increment in active and reactive power leads to frequency and voltage drop...
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...
Electric cars are using electric motors as its drive train instead of using conventional engine and it is considerate as the future transportation which is not consume the fossil fuels and could be the solution for the environment issues. Induction motor is the most suitable electric drive for electric cars because it is simple, less maintenance and good driving cycle. Many studies has been developed...
In variable speed drive applications the inverter fed induction machine is one of the most reliable systems. However, increasing demands on efficiency leads to higher wear of all system components. Unexpected machine breakdowns cause economic losses and/or undesired scenarios in safety-critical areas. Thus condition monitoring of all components can reduce the risk of outages due to faults. High electrical...
Battery electric vehicle (BEV) technology is the most often used type of EV due to its reliable energy storage system. According to the different driving cycles of EVs, electric motors undergo degradation as a result of sudden variations in the dynamic state of torque. Therefore, reliability and performance assessment of the electric motor are important. This paper presents transient and harmonic...
Multilevel inverter technology has emerged recently as a very important alternative in the area of highpower medium-voltage energy control. But the unbalance of these different input DC voltage sources constituted the major limitation for the uses of this power converter. This paper proposes the control and regulation method of input DC voltages of five-level voltage source inverter.
This paper presents a control scheme of single phase to three phase converters for low power three phase induction motor drives, with reduced number of switching devices. Here a single phase half-bridge PWM rectifier and two-leg inverter are used with the same function that are all given by conventional one such as sinusoidal input current, unity power factor, bidirectional power flow, dc-link voltage...
Indirect Field Oriented Control is a control technique used in AC drive systems to obtain high performance torque control. Sine pulse width Modulation is used for control the three level diode clamped inverter. In these applications, a rotational transducer such as a shaft encoder senses the speed of rotor. PI controller is then used to alter the firing pulse of three level diode clamped inverter...
Induction motors are normally used in the industrial environments. Industry has begun to use energy efficient high power rating electrical drives. Multilevel inverter drives have become a solution for energy efficient drives in recent years. There may be probability for occurring of many faults in the multi-level inverter fed induction motor drive due to its complex switching patterns. So it is necessary...
This paper aims to achieve a control of a photovoltaic water pumping system. The study consists of a photovoltaic generator, an inverter, an induction motor and a centrifugal pump as mechanical load. The model used for global simulation is a closed loop model: the voltage output of PVG model is coupled with the voltage input of the inverter-induction motor model; the current output of this latter...
The paper deals with the analysis of the rotor flux oriented control with space vector modulation technique for a five phase induction motor drive. The speed control using the rotor flux oriented control (RFOC) with or without speed sensor uses proportional integral controlled technique which make it possible to achieve satisfactory goals on the torque dynamics and flux. Simulated results on a five...
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...
Space vector modulation is a widely used pulse width modulation technique for variable speed drive application. This paper proposes Type-2 Fuzzy based space vector modulation technique for voltage source inverter. The proposed TYPE-2 Fuzzy network is independent of the switching frequency. The performance of TYPE-2 Fuzzy controlled drive is compared with the conventional SVM based drive. The THD values...
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