Patent ID: 7671550

Claim:
A motor control apparatus for providing an exercise resistance and an automatic rewinding function, characterized in that a microprocessor is operated together with a current detection feedback loop and a motor rotation speed detection loop for precisely controlling a quick random operation of a motor, such that the motor axle can control a loss braking unit and a power driving unit based on the existence of an external force, and the motor can be switched automatically to an electric generator output mode or an electric machine output mode, wherein the operating control procedure includes an electric generator output mode and an electric machine output mode; for the electric generator output mode, when an external force is exerted onto the motor axle to rotate the motor axle towards a stretching direction, the microprocessor commands the power driving unit to stop operating through an announcement of the current detection feedback loop, and loss braking unit is electrically conducted, and the load resistance eliminates the loss of energy produced in the electric generating mode; and for the electric machine output mode, when the external force of the motor axle is paused or released, the microprocessor commands the power driving unit to be electrically conducted through the same current detection feedback loop, and a power supply end supplies electric energy to start producing a reverse winding motion, and the loss braking unit stops operating synchronously.