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1

The effect of closed loop control on diagnostic indices in different faults of squirrel cage induction motor

Bouabid Nourelhouda, Moussa Mohamed-Amine, Maouche Yassine, Khezzar Abdelmalek

Archives of Electrical Engineering

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2021

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Vol. 70, nr 4

943--958

EN

The aim of this work is to study the influence of closed loop control on diagnostic indices of both broken bar and mixed air-gap eccentricity fault indices of the squirrel cage induction motor drive. The present work is focused on the direct stator current isd signal analysis, which is independent of torque load when the induction motor is controlled by an indirect control field. The fault signatures are on the line extracted from the direct stator current signal using the discrete Fourier transformation (DFT). The formula of the measured direct stator current at both conditions is determined by the transfer function of the current loop. The obtained results show that the current loop corresponds to a low pass filter and can reduce the magnitude of diagnostic indicators which lead to wrong evaluation of the fault. Simulation and experiments were carried out in order to confirm the theoretical analysis.

2

Closed Loop speed control of BLDC Motor Drive by using classicalcontrollers with Genetic Algorithm

Das Upama, Biswas Pabitra Kumar

Journal of Power Technologies

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2020

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Vol. 100, nr 2

161--170

EN

Permanent magnet brushless DC motors (PMBLDC) find broad applications in industries due to their huge power density, efficiency, low maintenance, low cost, quiet operation, compact form and ease of control. The motor needs suitable speed controllers to conduct the required level of interpretation. As with PI controller, PID controller, fuzzy logic, genetic algorithms, neural networks, PWM control, and sensorless control, there are several methods for managing the BLDC motor. Generally, speed control is provided by a proportional-integral (PI) controller if permanent magnet motors are involved. Although standard PI controllers are extensively used in industry owing totheir simple control structure and execution, these controller shave a few control complexities such as nonlinearity, load disruption, and parametric variations. Besides, PI controllers need more precise linear mathematical models. This statement reflects the use of Classic Controller and Genetic Algorithm Based PI, PID Controller with the BLDC motor drive. The technique is used to regulate velocity, direct the BLDC motor drive system’s improved dynamic behavior, resolve the immune load problem and handle changes in parameters. Classical control & GA-based control provides qualitative velocity reaction enhancement. This article focuses on exploring and estimating the efficiency of a continuous brushless DC motor (PMBLDC) drive, regulated as a current controller by various combinations of Classical Controllers such as PI, GA-based PI, PID Controller. The controllers are simulated using MATLAB software for the BLDC motor drive.

3

Design of dimmable light emitting diode driver for low power applications

Reddy U. Ramanjaneya, Koppolu Kalyan Kumar

Journal of Power Technologies

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2019

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Vol. 99, nr 3

204--209

EN

High-brightness light emitting diodes (HB-LED) are used in various applications in preference to conventional light bulbs due to following merits: eco-friendly nature, high luminous efficacy, prolonged life, compactness and low heat dissipation. This work presents the boost converter fed dimmable light emitting diode where illumination control is required. The proposed work uses pulse width modulated (PWM) controlled switch in series with LED load to control the illumination level by adjusting the pulse width. The closed loop control is designed in Matlab/Simulink to regulate the load voltage. This paper first illustrates in detail the basic operation of the converter and dimming control and then provides the simulation results with different illumination levels to demonstrate the effectiveness of converter and controller.

4

Sterowanie szeregowe maszyną CNC

Kowalski P., Smyk R.

Poznan University of Technology Academic Journals. Electrical Engineering

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2016

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No. 85

211--219

PL

W artykule przedstawiono projekt urządzenia klasy CNC. Opracowano nowy sposób sterowania elementami wykonawczymi odciążający komputer centralny poprzez ograniczenie jego roli do wysyłania poleceń do mikrokontrolera sterującego, zamiast bezpośrednio do elementów wykonawczych. Uzyskano to poprzez wykorzystanie protokołu szeregowego z użyciem portu USB do sterowania maszyną CNC.

EN

In this paper a design of the CNC machine is proposed. A new method of controlling actuators has been elaborated that relieves the central computer by limiting its role to sending of commands to the controller instead of sending it directly to actuators. It has been achieved by utilizing the serial protocol using the USB port to control the CNC machine.