| ??? 04/13/07 04:37 Read: times |
#137108 - I will use Mosfets Responding to: ???'s previous message |
You need to find a topology (discrete or integrated) that send the required speed provided by the microcontroller pwm switching a power mosfet between the power supply and the dc motor, while another mosfet is connected in paralell with the motor and is switched on at stop time acting as a break.
In this way you have a fast stop, to have a fast start you need to send an overshot in the pwm signal for a short time at start from stop, this time depends on mechanical constants of your motor + load. Take note that a dc motor with a current rating of 0.5 can have a peak current at stop time in the range of 2 to 4 amperes. Tell me if this kind of idea is what are you searching for and I can make some drawing to help you. Jose Maria |
| Topic | Author | Date |
| pwm dc motor controller | 01/01/70 00:00 | |
| At what current ? | 01/01/70 00:00 | |
| dc motor contrl ckt. | 01/01/70 00:00 | |
| I will use Mosfets | 01/01/70 00:00 | |
driver circuit | 01/01/70 00:00 | |
| Why not stepper motor? | 01/01/70 00:00 | |
| no stepper motor | 01/01/70 00:00 |