how to control the speed dc motor... ??? whather it can be controlled used microcontroller?

 

With potentiometer.
http://www.allaboutcircuits.com/vol_6/chpt_3/7.html

 

or a microcontroller/transistor/mosfet (pwm)..
or an off the shelf DC SCR/PWM motor controller..
obviously all DC motors are not the same..
A proper/detailed question would include specifications on this DC motor.

 

Off the shelf there are KB/Baldor SCR or PWM controllers, for the very simple solution, there are numerous simple PWM on ebay for ~$15.00.
Max.

 

or a microcontroller/transistor/mosfet (pwm)..
or an off the shelf DC SCR/PWM motor controller..
obviously all DC motors are not the same..
A proper/detailed question would include specifications on this DC motor.

or a microcontroller/transistor/mosfet (pwm)..
or an off the shelf DC SCR/PWM motor controller..
obviously all DC motors are not the same..
A proper/detailed question would include specifications on this DC motor.

thank to you answer..i will question any more..
used motor DC series....when speed motor dc low, whather torque of motor dc be decrease?? how mien speed is low we obtained torque advance ?

 

Off the shelf there are KB/Baldor SCR or PWM controllers, for the very simple solution, there are numerous simple PWM on ebay for ~$15.00.
Max.

how mien controlled SCR..??? whather using PWM???

 

With potentiometer.
http://www.allaboutcircuits.com/vol_6/chpt_3/7.html

thank for your answer..

 

DC motor Torque curve is generally fairly flat, starting at maximum at zero rpm dropping when maximum rpm limit is reached.
SCR bridge is usually the cheapest method, followed by the more favorable PWM.
More is needed on your application.
Max.

 

DC motor Torque curve is generally fairly flat, starting at maximum at zero rpm dropping when maximum rpm limit is reached.
SCR bridge is usually the cheapest method, followed by the more favorable PWM.
More is needed on your application.
Max.

if i want control speed motor dc constant..what method which most efficient?? i still general with speed control motor dc series...
risky

 

Go back a read post # 3, & supply an answer. You may need to attach a tachometer to adjust to a given speed.

 

Go back a read post # 3, & supply an answer. You may need to attach a tachometer to adjust to a given speed.

ok thanks for your answer... what is sensor can be used mearsured speed?? whather directly connect to tachometer??

 

If just velocity a DC or digital AC tach can be used, if position, then an encoder is needed.
Max.

 

ok max.. whather method can be used?for speed constant..whather control pulse PWM for controlled speed of motor dc..

 

Your IMG shows a PID loop via encoder, as already mentioned this is suitable for precise positioning, if you just want constant velocity, the tach method can be used, usually tach/velocity loops can control to within 1%.
Either methods can be from self programmed Picmicro or other µp methods etc to off the shelf industrial controllers.
You need to specify your exact intentions, and any preferred or capable methods.
Max.

 

Your IMG shows a PID loop via encoder, as already mentioned this is suitable for precise positioning, if you just want constant velocity, the tach method can be used, usually tach/velocity loops can control to within 1%.
Either methods can be from self programmed Picmicro or other µp methods etc to off the shelf industrial controllers.
You need to specify your exact intentions, and any preferred or capable methods.
Max.

to obtain a high torque gear box whether to use????

 

If you want to.

 

If you want to.

ok thanks