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Design and Fabrication of a Dc Driver Circuit Control Dc Motor
Diponkar Paul,
Rajib Mondal
Issue:
Volume 2, Issue 1, February 2013
Pages:
1-11
Published:
20 February 2013
Abstract: A DC Motor Driver is a device that drives motor, typically as a speed controller of motor. This DC Motor Driver circuit uses a 741 operational amplifier operating as a voltage follower where its non inverting input is connected to the speed and rotation direction of a potentiometer. When the potentiometer is turned towards the positive supply side, the output will go positive voltage and NPN transistor will supply the current to the motor and PNP transistor will be OFF. When the potentiometer is turned to the negative supply side, the op-amp output switches to the negative voltage and NPN Transistor will turn OFF and PNP Transistor ON which reverses the rotation of the motor's direction. It has been design along with Op-Amp to drive the motor. The fabrication results of DC Motor Driver provide very good results. The total cost of fabricated our dc motor driver using Op-Amp is comparatively cheaper than the traditional dc Motor Driver available in market price. A DC Motor specification is taken and corresponding parameters are found out from derived design approach. Ultimately simulation is done for model with and without filter used after reference speed and a comparative study has been done on response of both cases. Further it is purposed that in industrial environment these controllers are better than others controllers as Op-Amp controllers are easy and cheap.
Abstract: A DC Motor Driver is a device that drives motor, typically as a speed controller of motor. This DC Motor Driver circuit uses a 741 operational amplifier operating as a voltage follower where its non inverting input is connected to the speed and rotation direction of a potentiometer. When the potentiometer is turned towards the positive supply side,...
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Optimal Placement of Phasor Measurement Units by Genetic Algorithm
Allagui B.,
Marouani I.,
Hadj Abdallah H.
Issue:
Volume 2, Issue 1, February 2013
Pages:
12-17
Published:
20 February 2013
Abstract: Monitoring and supervision of power systems are provided by the control center, whose role is the design, coordination and network management. This paper presents a control technique based on the implantation of measurement units at the network buses. This technique should meet two requirements: ensure the complete system observability and find the optimal locations of PMUs with the minimum cost. The problem was formulated as a mono-objective optimization problem and its resolution was made by implementing a genetic algorithm (GA). The proposed method is tested on three tests networks and the results are compared with other resolution techniques. The simulation results ensure the complete system observability and validate the presented technique.
Abstract: Monitoring and supervision of power systems are provided by the control center, whose role is the design, coordination and network management. This paper presents a control technique based on the implantation of measurement units at the network buses. This technique should meet two requirements: ensure the complete system observability and find the...
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Distortion of Uniform Electric Field by Human Body of Technical Personal in Substations with Super High Voltages 330-500 kv
Issue:
Volume 2, Issue 1, February 2013
Pages:
18-28
Published:
20 February 2013
Abstract: For protection electric substations personnel from harmful effects of the super high voltage electric field, it is need to measure the level and time of electric field exposition of personal by using mobile electric field measurement instrument. The instrument are placed in mans helmet close to a head in area of high electric field intensity. Standards for limited vales of electric field intensity are estimated for undistorted electric field. As a conductor, the human body distorts the original electric field around the body and device shows distorted value of electric field. Investigation of level distortion by the finite element method and the experimental measurements shows that the maximum distortion appears with change of height of the person and at change parameters of foot ware soil. These parameters, height of the person and foot ware soil data should be used for design of a measurement devise and for adjustment the device before measurements. Change of other person parameters can be ignored because of very law level of changes field distortion.
Abstract: For protection electric substations personnel from harmful effects of the super high voltage electric field, it is need to measure the level and time of electric field exposition of personal by using mobile electric field measurement instrument. The instrument are placed in mans helmet close to a head in area of high electric field intensity. Stand...
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