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Author

I. Moazzem

Bio: I. Moazzem is an academic researcher from North South University. The author has contributed to research in topics: Thyristor drive & Braking chopper. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

Papers
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Proceedings Article
29 Jan 2011
TL;DR: In this paper, an implementation of the ATmega8L microcontroller for speed control of DC motor fed by a DC chopper has been investigated, where the chopper is driven by a high frequency PWM signal.
Abstract: The electric drive systems used in many industrial applications require higher performance, reliability, variable speed due to its ease of controllability. The speed control of DC motor is very crucial in applications where precision and protection are of essence. Purpose of a motor speed controller is to take a signal representing the required speed and to drive a motor at that speed. Microcontrollers can provide easy control of DC motor. Microcontroller based speed control system consist of electronic component, microcontroller and the LCD. In this paper, implementation of the ATmega8L microcontroller for speed control of DC motor fed by a DC chopper has been investigated. The chopper is driven by a high frequency PWM signal. Controlling the PWM duty cycle is equivalent to controlling the motor terminal voltage, which in turn adjusts directly the motor speed. This work is a practical one and high feasibility according to economic point of view and accuracy. In this work, development of hardware and software of the close loop dc motor speed control system have been explained and illustrated. The desired objective is to achieve a system with the constant speed at any load condition. That means motor will run at a fixed speed instead of varying with amount of load.

5 citations


Cited by
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Proceedings ArticleDOI
21 Feb 2013
TL;DR: In this paper, an innovative technique of the speed control of the separately excited DC Motor by Boost converter fed field control is being discussed, which is a feasible and high feasibility according to economic point of view and accuracy.
Abstract: In this paper, an innovative technique of the speed control of the separately excited DC Motor by Boost converter fed field control is being discussed. Purpose of a motor speed controller is to take a signal representing the required speed and to drive a motor at that speed. Controlling the PWM duty cycle is equivalent to controlling the motor field winding terminal voltage, which in turn adjusts directly the motor speed. By adjusting the duty cycle of the IGBT then the output voltage is varied. This voltage is above the rated voltage. If we can apply this voltage to the field winding, the flux production is more than the normal level. Due to this, automatically speed will be decreased. By providing one variable series resistance in the output terminal of the chopper, then if it is varied means, the current flow through the field winding is limited. By this condition, the flux production is less. Now the speed will be going to increases. In this method, the field winding should be designed for above the rated voltage. This work is a feasible one and high feasibility according to economic point of view and accuracy. In this work, developmental design of hardware of a closed loop dc motor speed control system by field control with PI speed controller have been explained and illustrated.

9 citations

01 Jan 2012
TL;DR: A permanent magnet moving coil dc motor adjustable speed drive control is implemented with hardware setup and software program in Visual Basic code to interface with hardware and software medium like simulation.
Abstract: Motor control are realized with two approaches: Hardware and Software through the application of Visual Basic (VB). A permanent magnet moving coil dc motor adjustable speed drive control is implemented with hardware setup and software program in Visual Basic code. The main feature used in Hardware and Software is their peripherals (parallel port peripherals) are used to interface with hardware and software medium like simulation. We have connected the hardware with the 32 bit parallel port cable to the CPU. As we increase the load on the DC motor the voltage of the Driver circuit decreases, which leads the connected LEDs to glow showing that we have reached to the peak value of the motor RPM. The output of the given system is achieved from the GUI of the LABVIEW; the coding is done in the Visual Basic.

3 citations

Journal ArticleDOI
TL;DR: A dual open loop speed control system based on two independent PWM signals of small permanent magnet DC (PMDC) motors using PIC16F877A microcontroller (MCU) has been designed and implemented.
Abstract: In this paper a dual open loop speed control system based on two independent PWM signals of small permanent magnet DC (PMDC) motors using PIC16F877A microcontroller (MCU) has been designed and implemented. The Capture/Compare/PWM (CCP) modules of the MCU are configured as PWM mode and the MCU is programmed using flowcode software package to generate two PWM signals with various duty cycles at the same frequency. A dual H-bridge channel chip SN754410 is used to drive the motors. The variation of PWM duty cycles is related directly to controlling the DC motors terminal voltage which directly proportional with speed of each motor. The complete PWM control system model has been simulated using proteus design suite software package. The development of hardware and software of the dual DC motor speed control system has been explained and clarified.

3 citations

Journal Article
TL;DR: In this article, a system is designed to bring convenience to the user to control the motor speed from anywhere by using SMS application by adjusting the duty cycle of pulse from Pulse Width Modulation technique simultaneously.
Abstract: In many industry such as paper mills, rolling mills, printing machine machine tools, excavators and cranes etc the dc motor is used for waying a product from one place to another on the conveyer belt . So due to these the speed and direction control of the dc motor is very important. purpose. Motor speed controller is to take a signal representing the required speed and to drive a motor at that speed For that purpose wireless speed and direction control of dc motor by radio frequency technique is very crucial with pulse width modulation and H-Bridge converter. The microcontroller is used to control the dc motor speed and Transistorised h-bridge converter is used for direction control. By adjusting the duty cycle of pulse from Pulse Width Modulation technique simultaneously the terminal voltage of motor is change and hence speed will be vary with terminal voltage. H-Bridge is a DC to DC converter used for direction and made by 4 transistor switch across it a diode are connected. This system is designed to bring convenience to the user to control the motor speed from anywhere by using SMS application.
20 Nov 2017
TL;DR: In this article, a mathematical model and optimization possibilities for large and small scale photovoltaic systems with accumulation were presented. But the main results of the paper were the design, configuration and realization of the hybrid energy system with subsequent optimization.
Abstract: The dissertation is an publication summary focused on the field of management processes in renewable energy systems, mathematical models and optimization possibilities for large and small scale photovoltaic systems. The articles were published in foreign impacted and reviewd journals and indexed proceedings of foreign and domestic conferences. The main results of the dissertation are the design, configuration and realization of the hybrid energy system with subsequent optimization. Using the data from the laboratory system, a mathematical model was compiled and subsequently validated in the Matlab / Simulink environment for a hybrid energy system with accumulation. The options for power production optimization with photovoltaic sources are based on both operational measurements (for commercial applications) and on the analysis of power flow controllers to optimize the energy balance (for small scale applications in private buildings).