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Speed control of dc motor pdf download

Speed control of dc motor pdf download

Working or Operating Principle of DC Motor




Download: Speed control of dc motor pdf download




Tiny optimizations like this can help your project function smoothly, with no wasted movement or values. Principle of Speed Control Rotational speed N of an induction motor can be shown by the expression 1. AC Speed Control Motors 2.


speed control of dc motor pdf download

Hence, very smooth speed control of the dc motor can be obtained by this method. When the voltage applied to the motor is increased and decreased, the slip s changes, then the rotational speed N will change. We extend the index finger, middle finger and thumb of our left-hand perpendicular to each other. Our speed control motor packages include the motor, the driver controller , and a potentiometer which allows for easy speed control adjustment.


speed control of dc motor pdf download

Speed Control Methods of Various Types of Speed Control Motors - If the sketch compiles correctly, click Upload to upload the sketch to your board. Characteristics The rotational speed-torque characteristics of a brushless DC motor system have a limited duty region in addition to the continuous operation area.

 

Modified on Friday 13th of April 2018 at 03:17:11 PM Speed control means intentional change of the drive speed to a value required for performing the specific work process. Speed control is a different concept from speed regulation where there is natural change in speed due change in load on the shaft. Speed control is either done manually by the operator or by means of some automatic control device. One of the important features of is that its speed can be controlled with relative ease. The first two cases involve change that affects armature circuit and the third one involves change in. Speed Control of DC Series Motor Speed control of DC series motor can be done either by armature control or by field control. Here the controlling resistance is connected directly in series with the supply of the motor as shown in the fig. The power loss in the control resistance of DC series motor can be neglected because this control method is utilized for a large portion of time for reducing the speed under light load condition. This method of speed control is most economical for constant torque. This method of speed control is employed for driving cranes, hoists, trains etc. The voltage applied to the armature is varies by varying series rheostat R 1. The exciting current can be varied by varying the armature shunting resistance R 2. This method of speed control is not economical due to considerable power losses in speed controlling resistances. Here speed control is obtained over wide range but below normal speed. This method involves high cost so it rarely used. Here the field flux can be reduced by shunting a portion of motor around the series field. Lesser the diverter resistance less is the field current, less flux therefore more speed. This method gives speed above normal and the method is used in in which speed should rise sharply as soon as load is decreased. In this method a number of tapping from field winding are brought outside. This method is employed in electric traction. An increase in controlling resistances reduces the field current with a reduction in flux and an increase in speed. This method of speed control is independent of load on the motor. Power wasted in controlling resistance is very less as field current is a small value. This method of speed control is also used in. Such a variable supply can be obtained by an electronic rectifier. Armature Control of DC Shunt MotorSpeed control by this method involves two ways. Field is directly connected across the supply so is not changed due to variation of series resistance. This is applied for DC shunt motor. This method is used in printing press, cranes, hoists where speeds lower than rated is used for a short period only. This method avoids disadvantages of poor speed regulation and low efficiency of armature-resistance control methods. The basic adjustable armature voltage control method of speed d control is accomplished by means of an adjustable voltage generator is called Ward Leonard System. This method involves using a M-G set. This method is best suited for steel rolling mills, paper machines, elevators, mine hoists, etc. This method is known as Ward Leonard System. Solid State Speed ControlStatic Ward Leonard drives are being used these days because of the drawbacks of the classical method. Rotating are replaced by solid state converters to control DC motor speed. The converters used are in case of DC supply or controlled rectifiers in case of AC supply. This method is not suitable for intermittent loads.

speed control of dc motor pdf download

The power loss in the control resistance of DC series motor can be neglected because this control method is utilized for a large portion of time for reducing the speed under light load condition. Speed control is a different concept from speed regulation where there is glad change in speed due change in load on the shaft. The application of this project is very useful in industrial nowadays depending on the type of DC motor used such DC shunt and DC series motor. The presence of the term cosα in the torque con very well signifies that unlike force the torque at all position is not the same. One rotation of the rotor is made by repeating this operation 12 times Step 1 ~ 12. Download Link Dropbox :. Then, the signal from the hall IC is sent to the del detector to become a speed signal, and it is compared with the speed setting signal in the comparison amplifier block, which then generates a deviation signal. This method avoids disadvantages of poor speed regulation and low efficiency of armature-resistance control methods. M 2 is the motor whose glad control is required.

50A DC Motor Speed Control on Hole Board