Induction Motor Sensorless and Closed Loop Torque Control in Frequency Converters

Štil, Vedrana Jerković; Miklošević, Krešimir; Špoljarić, Željko; Kurtovic, Goran

doi:10.1109/sst.2018.8564605

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…In order to give excitation current to the coil of the main generator rotor, the main exciter acts as a trigger for initial electricity generation. The magnitude of the magnetic flux depending on the DC 1198 (2023) 012022 IOP Publishing doi:10.1088/1755-1315/1198/1/012022 2 current supplied to the stator exciter determines the excitation current sent to the coil of the main exciter rotor [3][4][5]. By adjusting the DC current supplied to the main stator exciter, value of magnetic flux can be influenced depending on the turbine shaft speed.…”

Section: Introductionmentioning

confidence: 99%

Setting exciter to obtain output synchronous generator to be used in wind energy conversion system

Hadi,

Musyafa

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Indonesia has well natural resource potential, one of which is the wind energy potential which can be utilized for electricity needs. However, the utilization of wind energy in Indonesia is still lacking. Therefore, it is necessary to have a system for utilizing wind energy with the aim of obtaining large electrical energy, one of which is the Wind Power Plant (PLTB) system. Synchronous generators have two important parts, namely the main generator (Alternator) and the exciter (Main Exciter). This exciter has a role as a trigger for the initial electricity generation to supply electricity to the main generator coil. The amount of electricity delivered to the main generator depends on the value of the magnetic flux in the generator exciter. The value of this magnetic flux depends on the amount of DC electric current flowing from the DC-DC Converter or Buck Converter. Therefore, a controller is needed to adjust the amount of electricity that enters the exciter. From the research that has been done, the optimal power at the rotational speed of the generator when the frequency is 50 Hz is 200.36 Watts with a generator voltage of 142.1 Volts and a duty cycle at 81.38%.

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Section: Introductionmentioning

confidence: 99%

Setting exciter to obtain output synchronous generator to be used in wind energy conversion system

Hadi,

Musyafa

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…To overcome this issue, diferent control strategies are attempted to enhance the estimation of rotor fux. Some of them are discussed further [8,9]. Te Kalman flter algorithm as well as its modifcations are reliable observers for both linear and nonlinear systems.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Implementation of Sliding Mode Controller-Based Variable Frequency Drive Using the SCADA System

Aljafari

Kumar

Indragandhi

et al. 2022

International Transactions on Electrical Energy Systems

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Vector control of an asynchronous machine is traditionally accomplished by analogizing it to a separately excited DC machine. It provides decoupled torque and flux control that is perpendicular to each other, ensuring that neither vector interferes with the other. So, despite their close interconnection, torque and speed control are accomplished separately. The rotor flux is aligned with the direct axis of the synchronously rotating reference frame to achieve this. The PI controllers are critical in achieving the variable frequency drive (VFD) desired topology. The system employs three types of controllers: flux, speed, and torque. The flux controller is easy to tune, but the speed and torque controllers are more difficult to tune because the speed controller's output is the torque controller’s reference signal. Furthermore, there is no well-defined method for tuning the controllers in a vector control system. However, perfect tuning is required for the machine’s better dynamic behavior. It is clear from the above analysis that system identification is critical for tuning PI controllers. However, as an asynchronous machine, obtaining a decoupled system transfer function is extremely difficult. To solve this problem, the proposed system combines a seven-level pulse width modulation (PWM) inverter for vector control of a three-phase asynchronous nonstandard induction machine used in critical applications in nuclear power plants with a sliding mode control technique that eliminates the complexity of PI tuning. A second-order sliding mode controller could be used in the future to reduce the chattering and parameter variation effects. This controller can be enhanced with fuzzy logic principles to make it more robust and reliable, allowing it to be used in future drive designs for high-rating motors with critical applications.

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Induction Motor Sensorless and Closed Loop Torque Control in Frequency Converters

Cited by 2 publications

References 5 publications

Setting exciter to obtain output synchronous generator to be used in wind energy conversion system

Setting exciter to obtain output synchronous generator to be used in wind energy conversion system

Analysis and Implementation of Sliding Mode Controller-Based Variable Frequency Drive Using the SCADA System

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