DC motor control progressive start and stop

[reinaldo]

hey Everybody!...
I`m stck with the Control of a DC Motor...I need To Control a DC motor in this way, it Must Start real slowly, and then progressively but slowly should continue to reach its maximun velocity, it could take up to 1 min to reach it; then remain for a set time stable at its final velocity and after the time pass then start to slow down in the same opposite slowly way as the start...how would i do that??

 

[berkeman]

hey Everybody!...
I`m stck with the Control of a DC Motor...I need To Control a DC motor in this way, it Must Start real slowly, and then progressively but slowly should continue to reach its maximun velocity, it could take up to 1 min to reach it; then remain for a set time stable at its final velocity and after the time pass then start to slow down in the same opposite slowly way as the start...how would i do that??

You need to use pulse-width modulation (PWM) on the DC to the motor. You vary the pulse width from narrow to wide to full-on to go from slow to faster to full speed.

See PWM for Power Delivery here: http://en.wikipedia.org/wiki/Pulse-width_modulation#Power_delivery

 

[oswaler]

Hello there,

To achieve progressive start and stop control of a DC motor, you can use a technique called pulse width modulation (PWM). This involves rapidly switching the power supply to the motor on and off, with varying widths of the on and off pulses. By gradually increasing the pulse width, the motor will start to spin slowly and then increase in speed as the pulse width increases.

Similarly, to slow down the motor, you can gradually decrease the pulse width, causing the motor to slow down in a controlled manner. This can be done using a microcontroller or a dedicated PWM controller.

It is important to note that the speed of the motor will also depend on the load and the torque required. So, you may need to adjust the pulse width accordingly to achieve the desired speed and acceleration.

I hope this helps. Good luck with your project!