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Here the DC motor is controlled by the microprocessor (8085). The kit used was dynalog 8085 kit. The DC motor is very difficult to control unlike the stepper motor, which can be controlled by giving the appropriate CONTROL WORD. By knowing the DC motor theory we know the different methods used to control the motor, the most primitive and the once upon a time the most popularly method was WARDLEONARD motor speed control, but this had many disadvantage, so the world of Electronics brought in the thyristor control, which were very flexible and can be employed to use AC instead of DC cause they had a inbuilt convertor. The thyristor-based system is good but when used with Microprocessor based speed controller they are really good. We have shown the block diagram, circuit diagram used by us to control a small tape recorder sized motor
mcc - motor control center or motor control console. A motor control center (MCC) is an assembly of one or more enclosed sections having a common power bus and principally containing motor control units
It is used for sensorless motor control. With vf speed control u can control speed of any induction motor.
The speed of DC motors need to be controlled because that is what the application needs. In some cases, it is to protect the motor or the attached equipment. In toys and robots, you'd want different speeds. Electric cars such as golf carts would need to control the speed of a DC motor so you can easily drive it like driving a car with a gasoline engine. Tape recorder motors contain a flywheel and a governor to regulate their speed so the tape will move at an even and standard rate. If the motor starts to get a little too fast, its contacts inside open up to briefly power down the motor and when it is slow enough, the contacts close again. So this helps to compensate for different amounts of battery charge and for different operating conditions. Record players have a simpler job of regulating their speed since most use alternating current and a simple induction motor. Since the voltage and frequency is constant, no governors are needed. Unless the bearings go bad, the motor will run at that fixed rate.
speed of a dc motor can be varied by mainly two methods:- 1)field control method 2)armature control method further , field control method can be divided in 3 parts:- 1)field rhestat control method---speed variation is acomplished by means of a variable resistance inserted in series with shunt field 2)reluctance control method---by changing the reluctance of magnetic circuit by choosing right material.. 3) field voltage control method-requires variable field voltage supply. and armature control method can be divided in 3 parts :- 1)armature resistance control---variable resisitance connected in series with armature 2)shunted armature control. 3)armature voltage control. ------------mrityunjay pandey (kiit university ,btech 2nd year)
The flux control method is the convectional and the non-convectional method of speed control of an induction motor.
there are two methods i.e armature control method and field control method....
Yes, th ration of motor neurons to muscle fibers are greatest for the muscles that control eye.
How many methods can be used to control the speed of Single Phase Induction Motor? 1.injecting emf method 2.by frequency control method 3.induced voltage method
True synchronous mode and self control mode
you can control the speed of a motor by changing frequency, increase or decrease the field winding or by voltage regulation. in these method you can controle the speed of athree phese motor SANDEEP SARKAR
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speed of a dc motor can be varied by mainly two methods:- 1)field control method 2)armature control method further , field control method can be divided in 3 parts:- 1)field rhestat control method---speed variation is acomplished by means of a variable resistance inserted in series with shunt field 2)reluctance control method---by changing the reluctance of magnetic circuit by choosing right material.. 3) field voltage control method-requires variable field voltage supply. and armature control method can be divided in 3 parts :- 1)armature resistance control---variable resisitance connected in series with armature 2)shunted armature control. 3)armature voltage control. ------------mrityunjay pandey (kiit university ,btech 2nd year)
The Feldenkrais method of excercise is a method made to allow for dynamic movement and helps the disabled to regain motor control. More information can be found here: http://www.feldenkrais.com/method/article/anti_exercise_for_the_older_and_wiser/
In armature speed control, speed can be varied only below the rated speed. Also in it voltage drops will be high.
It is a method of starting a three phase motor at a lower than operating voltage. The motor is operated at that voltage for a short specific time and then the controls switch to the motors full run operating voltage.
The easiest way to control any electric current to any device is with the inline use of either a manual or electric reistate.