Stepper Motors – Control System Components – Control Systems | Ekeeda.com

Stepper Motors – Control System Components – Control Systems | Ekeeda.com


Hello Friends in this video we are going to study about the second control system component stepper motor so what is a stepper motor Stepper motor is an electromechanical device so it is also an electromechanical device that is the input it is here it is mechanical input and in the output we are getting an electrical signal it is also a digital device because it is working on the pulses okay that is the digital device if you represent a digital device it will look like that it is either at one time it is zero then you at one time it will be one so the output will be like this digital output so it is an electromechanical digital device now the stepper motor it activates activates means it gives an output so stepper motor it is giving an output in the form of train of step movements that is straight means a continuation of step movements in response to train of input pulses that is the input is this in the form of pulses to these stepper motor and in response to this input pulses it is giving the output in the form of step movements that is the rotor of the motor it is moving stepwise okay so this rotor it is going to move one step at each input pulse that is why this stepper motor it is a digital device because the input is also a digital signal and output is also a digital signal that means the stepper motor its output what is the output of the stepper motor the shaft the displacement of this shaft so shaft angular displacement and this output it is completely determined by the input passes so the output of the stepper motor it is the angular displacement of the shaft and this angular displacement it is determined by the number of input pulses now this angular displacement of the shaft it can be linear or it can be rotational and also it can be either in the clockwise direction or it can be in anti-clockwise direction that is the movement of the shaft it can be angular or linear and also it can be either in the clockwise or the anti-clockwise direction now each input pulse it will initiate a one step movement that is the one input pulse it will give one step movement second input once it will give second step movement so in response to the input pulse we are getting an output displacement so the movement of the total movement of the stepper motor it will consist of many discrete step movements so one rotation of the stepper motor it will be equal to many short or many small step movements okay so each revolution revolution means one complete movement of the stepper motor suppose it’s starting from a point and it is completing the full circle so it is one revolution of the stepper motor so each revolution of the stepper motor now to understand this taken example that the suppose does step size for second moto so we are taking an example where the step size of a stepper motor is in between 1.5 degrees to 30 degrees now if the now the stepper motor is having the step size between the inch 1.5 to 30 degrees and we are taking the example where the motor is having the step size as five degrees okay so we have taken the step sizes five degrees now if the input to the stepper motor it is five o’clock pulses then the complete rotation of the motor will be five into the five o’clock pulses so five degrees into five o’clock pulses so it will be the motor will move by twenty five degrees so the angle of rotation it will be twenty five degrees for a stepper motor with a step size of five degrees so in this way we will calculate that how much the stepper motor is moving now the direction of the movement as we have said that it can be either clockwise or anti-clockwise so this direction of the angular displacement it is determined by the direction of the input pulse that whether the input pulses from high to low or it is from low to high so in according to that the direction of the rotation of the the shaft it will be decided now let us study the types of stepper motors stepper motors are classified on the basis of their construction and they are working so according to that there are three types of stepper motors first is variable reluctance stepper modem the second type is permanent magnet stepper motor and third is and this classification is done depending on the construction and performance of these motors now in this video we are going to study only this permanent-magnet type stepper motor okay because this motor is very important so we will study only this permanent-magnet stepper motor now let us see the construction for this permanent-magnet stepper motor let you know its diagram on the next page we have this is the state of the sorry these are the rotors of the stepper motor this is the stator having four poles now on each stator we are having a winding this was the rotor and it is the stator now this is the permanent magnet from mill magnet stepper motor and in this we are having those stator there are four state of poles there are six rotor poles okay and the step angle full step angle of this motor this 30 degrees that is for every input pulse this rotor it will move by an angle 30 degrees now let’s see how it works these status they are wounded with the windings and each winding will be separately excited okay that is at one time this a winding will be excited then at another time we will be winding then C and B no two windings they will be excited means at the same time we are not exciting two windings only one binding will be excited at okay now these stator windings they are packed in such a way so these stator windings these are the stator windings they are wrapped in such a way that if we closed any of the windings switch that is we are exciting this a winding then this the pole of this winding that is of the pole of this stator it will become magnetically North okay suppose we are exciting this a winding then this pole will become not so it is going to attract the South Pole or it is going to induce to South Pole in this rotor okay so at this position this North and South Pole they are going to attack each other and this North Pole will induced South Pole in this rotor holes okay so stator windings they are wrapped in such a way that closure of any of the windings control switch it causes that stator pole or this winding pole to become magnetically north now if the six fold rotor it is now if this six poles rotor is permanently magnetized then this video is incarnation of the second control system component stepper motor so if this six pole rotor it is permanently magnetized and only a single state and winding as I have said earlier it is excited one time then then the nearest South Pole of the rotor it will align with the excited state of pole as I have said that let’s see the diagram in the diagram this is suppose we have excited the a stator winding and this stator pole it has become magnetically North and this North Pole it will attract the nearest South Pole so that they will be aligned in a single line so in this way the movement of or the here we are giving this stator winding as the input pulses so these input pulses they are causing the angular displacement of the shaft or the output of the motor it is the angular displacement of the shaft and this angular displacement will be in steps that is for first movement it will move by a step angle of 30 degrees so in this way D permanent-magnet stepper motors they work now let’s see that where these stepper motors they can be fused as it is used as a control system component so the first application of the stepper motor is in automatic control systems second we can use them in computer peripheral systems the other name for this peripheral is output so we can use these stepper motor in the computer output systems that means that they can be used as systems output systems of the computer such as printers a drives capstan drives so all the output systems of a computer we can use there the stepper motors now they can be also used in process control systems in paper drive mechanisms in spacecrafts watches etc so these are the uses of these stepper motors that is they are used to in the automatic control systems in process control systems they are used in the computer peripheral systems like printers tape drives capstan drives so in this video we have studied about the second control system component stepper motor and we have seen that the stepper motor is and digital electromechanical device because it converts the input pulses which are in the form of a digital signal into a output which is the angular displacement of the shaft then we studied the types of stepper motors and they have seen that there are three types of stepper motors variable reluctance stepper motor permanent magnet stepper motor and permanent magnet hybrid stepper motor and out of these three we have studied here in this video only one stepper motor that is permanent magnet stepper motor and it’s working we have also seen here and then in the last we have studied the applications of stepper motor I hope this topic is clear to you thank you

11 Replies to “Stepper Motors – Control System Components – Control Systems | Ekeeda.com”

  1. In the first statement you say that in stepper motor it take mechanical input and give electrical output…..then how u say that it is a motor

  2. no mamm i didn't like this…this is theoretically explanation which we can also do it but we want practically with diagramm…plz

  3. Hello Friends,

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