Battery based DC motors

High current but not bad.

I wouldn't say that is an absolute.


If you need to regulate the speed then you may want to build a motor
amplifier, at that current, PWM. Otherwise, if you don't need to control
speed, just use a high current relay.

A "boost regulator" may be usefull if you want to make the motor go faster
than it would at 12V. Torque of a motor is based on current. The voltage
required to drive a motor at a specific speed must be higher than the back
EMF of the motor at the desired speed.

    What are you expecting from a regulator?  You're not going to
get out more power than you put in.

                John Nagle

I would like to speed control the motor involved.

As the battery gets low, I can keep the speed constant.

Or am I totally off base !!

Donald

That is "true" in the purest sense, but a "boost regulator" can increase the
voltage, thus raising the point where you reach equilibrium with the back
EMF of the motor, allowing the motor to spin faster (assuming you have not
exceeded the capacity of the power supply). Obviously, the boost regulator
will use more power than a batter connection because a boot regulator is
not 100% efficient and the motor will be spinning faster than it would
under direct power.

hai donald,
its better u buy that boost regulator