Limiting current draw from Lead Acid Battery - Page 3

 

On Wed, 26 Oct 2005 13:58:20 -0700, Mr Bob wrote:


There is insufficient information provided with your original question
to suggest a meaningful answer.

Please be more specific - what are you trying to accomplish?

Thanks,
Rich

 

I have my answer.  Thanks for all the help.

The speed of a DC motor is directly proportional to the supply voltage,
so if we reduce the supply voltage from 12 Volts to 6 Volts, the motor
will run at half the speed. How can this be achieved when the battery
is fixed at 12 Volts?

The speed controller works by varying the average voltage sent to the
motor. It could do this by simply adjusting the voltage sent to the
motor, but this is quite inefficient to do. A better way is to switch
the motor's supply on and off very quickly. If the switching is fast
enough, the motor doesn't notice it, it only notices the average
effect.

 


It's real hard to say, some devices can be damaged if underpowered.

Bye.
   Jasen