Design and Implementation of an Interface Circuit for DC Motor Speed Control Using the PWM Technique (original) (raw)
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" Speed Control of DC Motor by using PWM "
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This paper presents an implementation of a microcontroller based boost converter to maintain constant speed of a DC motor. The optimised values namely kp,ki,kd of the Boost Converter are taken from firefly algorithm[10] and implemented using microcontroller. Pulse width modulation (PWM) is a procedure to generate changeable pulse width with different duty cycle. The PWM signal reduces the switching losses. This paper presents a DC motor speed controller where PID Controller is used where the optimized values of kp,ki,kd are taken from firefly algorithm[10]. The PWM pulse width will alter the speed of the motor. The motor voltage and revolutions per seconds (RPS) obtained at different duty cycle rates. With increase in duty cycle, further voltage is applied to the motor. This gives stronger magnetic flux in the armature windings and to enhance revolutions per seconds. The characteristics and concert of the DC motor speed control system was discussed. In this paper, a PIC microcon...
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EFFECT OF PULSE WIDTH MODULATION ON DC MOTOR SPEED
International Journal of Students’ Research In Technology & Management, 2017
Pulse width modulation (PWM) is used to generate pulses with variable duty cycle rate. The rapid rising and falling edges of PWM signal minimises the switching transition time and the associated switching losses. This paper presents a DC motor speed controller system using PWM technique. The PWM duty cycle is used to vary the speed of the motor by controlling the motor terminal voltage. The motor voltage and revolutions per minutes (RPM) obtained at different duty cycle rates. As the duty cycle increases, more voltage is applied to the motor. This contributes to the stronger magnetic flux inside the armature windings and the increase the RPM. The characteristics and performance of the DC motor speed control system was investigated. In this paper, a PIC microcontroller and a DC-DC buck converter are employed in the DC motor speed controller system circuit. The microcontroller provides flexibility to the circuit by incorporating two push button switches in order to increase and to decrease the duty cycle rate. The characteristics and performance of the motor speed controller system using microcontroller was examined at different duty cycle rate ranging from 19% to 99%.
Abstract: The presented paper is concerned with the speed controlling of dc motor by using embedded system, which is easy to use and provide us very high accuracy. Here we have compared the different type of techniques which are used to control the speed of DC motor. We have used CMOS 8-bit microcontroller with 8K bytes in system programmable flash AT895S2. The most important advantage of a DC motor is that we can vary the relationship of speed-torque as per our requirement & for that purpose we have use a simple technique which is known as Pulse Width Modulation, which is used to produce low and high pulses. The pulses produce is the cause of changing speed of motor. Therefore to achieve this we have use a microcontroller (AT89S52), which can be programmable to set the speed by changing the time period of duty cycle in the code. Keywords: embedded, microcontroller, Pulse Width Modulation (PWM), speed-torque, CMOS.
Microcontroller based closed-loop automatic speed control of DC motor using PWM
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.