Want to Increase Current in Motor

It's very easy. In a motor running on any given voltage supply, the mechanical torque and the electrical current are proportional to each other. So, to increase the current, give the motor more work to do; get it to drive a bigger mechanical load.

However, the mechanical load cannot increase without limit. Beyond a certain point, the motor will slow down to an unacceptable speed, at which point its back-EMF (which is proportional to its speed) will be so low that the current drawn will be high enough to turn it from a motor into a convection heater. If it can survive this abuse, fine. However, most motors just cook in an overload situation and then require replacement. That is why, in industrial motors, the Full-Load-Current is marked on the motor and the overload protective device in the starter equipment must be set no higher than this figure.

Why do you want to increase the current?
I suspect you are asking the wrong question.
What are you actually trying to achieve?
Del

Perhaps he want to see what will be is the highest current that will blow up the DC motor.

http://en.wikipedia.org/wiki/Torque_and_speed_of_a_DC_motor

Don't ask questions simply because this forum is free and you think we don't have anyother work other than answering your dumba$$ questions.