DC Motor Braking

[hendrachubby]

Hello,
I'm now trying to control a dc motor, but if i stop the motor it just free and can't brake.
Anyone can help me to explain how to brake a dc motor using motor driver ? can i do it with any motor driver ?

[chelmi]

Hello,
I'm now trying to control a dc motor, but if i stop the motor it just free and can't brake.
Anyone can help me to explain how to brake a dc motor using motor driver ? can i do it with any motor driver ?

Usually you have to set the two direction input pins of your motor controller to high:
http://itp.nyu.edu/physcomp/Labs/DCMotorControl#toc6

I you use a classic H-Bridges chip (L293 or SN754410) this should work.

Chelmi.

[hendrachubby]

Is it work with any DC motor ? Is the same method with shorting the 2 terminal of motor causing it brakes ?

[chelmi]

Is it work with any DC motor ? Is the same method with shorting the 2 terminal of motor causing it brakes ?

I would think so. What DC motor do you have ? What do you mean by "shorting the two terminal of motor?"

[hendrachubby]

I use sanyo denki DC motor, i try to connect the terminal of the motor and turn the motor with hand, i feel the motor brake acting like a generator i think.

[want2learn]

Yes you can brake a dc motor by 'shorting' both motor terminals together although braking with an h-bridge holds the motor better

[Soeren]

Hi,

Yes you can brake a dc motor by 'shorting' both motor terminals together although braking with an h-bridge holds the motor better

How's that???
Shorting the terminals is close to zero Ohm, shunting it with an H-bridge adds two R_ds_on to the equation!

[Webbot]

You've said which motor you are using but what controller are you using?

Some controllers (like my designs in the member pages) - use a tri-state switch to switch between forward/reverse/brake.