As an example, look at a person riding a bicycle, with the person acting like the electric motor. If that person tries to trip that bike up a steep hill in a gear that is designed for low rpm, she or he will struggle as
they try to maintain their balance and achieve an rpm which will permit them to climb the hill. However, if they shift the bike’s gears right into a speed that will create a higher rpm, the rider could have
a much easier time of it. A constant force can be applied with smooth rotation being offered. The same logic applies for commercial applications that require lower speeds while preserving necessary

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

Recall that inertia may be the way of measuring an object’s resistance to change in its movement and its function of the object’s mass and shape. The greater an object’s inertia, the more torque is needed to accelerate or decelerate the thing. This means that when the load inertia is much bigger than the motor inertia, sometimes it could cause extreme overshoot or enhance settling times. Both conditions can decrease production range throughput.

However, when the electric motor inertia is larger than the strain inertia, the engine will need more power than is otherwise necessary for the particular application. This raises costs since it requires having to pay more for a electric motor that’s larger than necessary, and because the increased power usage requires higher working costs. The solution is by using a gearhead to match the inertia of the engine to the inertia of the load.