As an example, consider a person riding a bicycle, with the person acting like the electric motor. If see your face tries to ride that bike up a steep hill in a gear that is designed for low rpm, he or she will struggle as
they try to maintain their stability and achieve an rpm that may allow them to climb the hill. However, if indeed they change the bike’s gears right into a speed that will create a higher rpm, the rider could have
a much easier period of it. A constant force could be applied with soft rotation being supplied. The same logic applies for commercial applications that require lower speeds while preserving necessary
torque.

• Inertia complementing. Today’s servo motors are generating more torque relative to frame size. That’s because of dense copper windings, lightweight materials, and high-energy servo gearbox magnets.
This creates greater inertial mismatches between servo motors and the loads they want to move. Utilizing a gearhead to better match the inertia of the motor to the inertia of the load allows for utilizing a smaller engine and results in a more responsive system that’s easier to tune. Again, this is accomplished through the gearhead’s ratio, where the reflected inertia of the strain to the motor is decreased by 1/ratio2.

Recall that inertia is the way of measuring an object’s resistance to improve in its motion and its own function of the object’s mass and form. The higher an object’s inertia, the more torque is required to accelerate or decelerate the object. This implies that when the strain inertia is much larger than the electric motor inertia, sometimes it can cause excessive overshoot or increase settling times. Both conditions can decrease production range throughput.

On the other hand, when the motor inertia is bigger than the strain inertia, the motor will require more power than is otherwise essential for the particular application. This raises costs since it requires having to pay more for a electric motor that’s larger than necessary, and since the increased power usage requires higher operating costs. The solution is by using a gearhead to complement the inertia of the electric motor to the inertia of the strain.