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The open-ended winding configuration allows feeding an electric motor from two sides. If one of them is connected to an inverter closed on a floating capacitor, operating as an active power filter, it is possible to obtain several benefits over the traditional configuration, such as an extended field weakening speed range and a lower current ripple. However, the additional converter causes switching...
Common mode voltage (CMV) and switching frequency of an inverter fed induction motor drive are dependent quantities. Increase in common mode voltage (CMV) with increase in switching frequency for induction motor drive is studied in this paper. Conventional sinusoidal pulse width modulation technique is used to drive an inverter fed induction motor. It is demonstrated that the peak value of CMV increases...
A three phase to five phase configured twenty pulse AC-DC converter fed 3-level modular multilevel inverter (MMLI) based vector controlled induction motor drive (VCIMD) is presented in this work. To limit the total harmonic distortion (THD) in the utility current as per IEEE-519 standard, a twenty pulse AC-DC converter is used at the input end of the proposed drive. A three phase system is converted...
One of the most popular and easy to implement control strategy for the inverter in induction motor drive system is the hysteresis current control. The most drawbacks associated with the conventional hysteresis current controller is the variable switching frequency due to the constant hysteresis band. This paper aims to develop variable hysteresis band with fuzzy logic controller which can produce...
Electric drives of high power applications require power electronic converters of high power rating. To meet this requirement, the multilevel inverter concept has been introduced for medium voltage and high power applications. The multilevel inverter became popular because of its advantages like low harmonic distortion, less rate of change of voltage (dv/dt) and it reduces the bearings stress of a...
This paper proposes simplified space vector modulation technique for speed control of induction motor drives. The space vector modulation technique generally has several advantages such as effective bus utilization and reduction in harmonic content. Conventional Space vector modulation technique is computationally complex for on-line implementation. A simplified space vector modulation technique is...
This paper explores the possibility of using a nine-phase machine, with three isolated neutral points, in order to produce a high dc-link voltage by cascading three lower voltage three-phase voltage source inverters. Each inverter drives one winding set of the machine. Consequently, used inverter switches and capacitors have three times smaller voltage rating when compared to the single high-voltage...
This paper demonstrates and validates the real-time performance of quasi z-source inverter (QZSI) for medium voltage induction motor drives using the field-programming gate array (FPGA)-based real-time digital simulator (RTDS). The simulator was built using hardware description language (HDL), making it versatile and moveable. The proposed QZSI-fed drive model is designed in MALTAB/Simulink and implemented...
This paper discusses application of Multilevel Inverter (MLI) in closed loop control of induction motor. This topology of MLI is called Nested topology which helps in reducing harmonics thereby increasing & improving the level and quality of voltages respectively. Proposed topology increases efficiency of output by reducing the losses effectively. The work mainly focuses on Matlab simulation and...
Inverter dead-time is known to make open-loop induction motor drives oscillatory, while operating at light-loads in particular. While dead-time compensation schemes exist, precise compensation of the same is often challenging as it involves factors such as device and driver delays and switching transition times, which are difficult to be quantified accurately. Hence, the effect of dead-time could...
A common-mode voltage eliminated 3-level PWM inverter based on an open-end winding induction motor drive is proposed in this paper. The open-end winding induction motor is fed from both sides by two 3-level inverters. The 3-level inverters are controlled by space vectors having zero common-mode voltage, thereby avoiding bearing current and leakage current in the system. In this scheme sector identification...
This paper presents the effect of dead-time and its compensation in a voltage source inverter for a scalar controlled induction motor drive at low speeds on light load condition. It is observed that the oscillations in the stator current under light-load conditions in a practical low voltage 690V, 875-kW and medium voltage 6.6kV, 1.8 MW 3-level inverter fed-induction motor drives is due to dead-time...
This paper presents a smart solar water pumping system with the grid interactive features using an induction motor drive. To alleviate the burden on the electrical grid, solar PVs (SPV) can be used to power up the agricultural and irrigational loads. The system is designed not only to provide the rated discharge of water but also to feed the surplus power to the grid. The SPV array is operated at...
Intelligent drive control methods are very much essential for the efficient use of Induction motors in various industrial production processes. Fault diagnosis of induction motor drives is based on the Voltages, Currents and Speed. In this paper hybrid structures of Neuro-Fuzzy (BPN with Fuzzy logic) are proposed for external fault diagnosis of induction motor drive. The results are analyzed based...
Renewable energy sources (RES's) is the major source of electrical energy in future, the available renewable energy systems are solar, wind, fuel cell out of these solar system is most popularly used because this source hugely available in nature, this renewable energy source (RES) is most in demand for agricultural, industrial applications. In the agricultural field renewable energy source (RES)...
A DSP based induction motor drive with parallel quasi-resonant converter is developed. The three-phase inverter bridge and resonant circuit switches are used for powering an induction motor drive. The “TMS320C2000™ Experimenter Kit” board built around the TMS320F2808 DSP controller is used to control the resonant circuit, inverter and motor. This platform is compatible with Simulink®, and includes...
This paper deals with the stability analysis of a five phase induction motor drive system which operates in closed loop constant v/f control mode. A very old and efficient technique called d-partition technique or parameter plane technique is utilized to determine the stability of a five phase induction motor drive. This is a very powerful technique which not only determines the relative stability...
Conventional Pulse Width Modulated (PWM) inverters create common mode voltage with high frequency and dv/dt. Common-mode voltage causes motor shaft voltage, bearing current and electromagnetic interference (EMI) in the induction motor drive system. In this paper, a common-mode voltage eliminated 2-level space vector pulse width modulation scheme based on a cascaded 3-level inverter is presented. When...
This paper deals with the modelling, simulation and implementation of a Fuzzy logic controlled Cuk converter-Inverter fed Induction motor drive. This work proposes PV fed Cuk converter to produce required DC voltage at the input of inverter. The output of the Photo Voltaic (PV) system is boosted using a Cuk converter. The output of the Cuk converter is inverted and applied to a three phase induction...
Recently the use of Model Predictive Control (MPC) in electrical motor drives has been reported both theoretically and experimentally. Predictive Torque Control (PTC) has been developed to control induction motor drives, allowing high-performance and fast dynamics. However, the optimization used in PTC is based on a single cost function minimization, where control objectives are merged by using weighting...
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