As an example, consider a person riding a bicycle, with the person acting like the engine. If that person tries to trip that bike up a steep hill in a gear that is made 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 into a swiftness that will create a higher rpm, the rider could have
a much easier period of it. A constant force can be applied with simple rotation being supplied. The same logic applies for industrial applications that want lower speeds while maintaining necessary
torque.
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Inertia matching. Today’s servo motors are generating more torque relative to frame size. That’s because of dense copper windings, light-weight materials, and high-energy 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 electric motor to the inertia of the strain allows for utilizing a smaller motor and results in a far more responsive system that is simpler to tune. Again, that is achieved through the gearhead’s ratio, where in fact the reflected inertia of the strain to the engine is decreased by 1/ratio2.
Recall that inertia is the measure of an object’s resistance to improve in its movement and its function of the object’s mass and shape. The higher an object’s inertia, the more torque is required to accelerate or decelerate the object. This means that when the load inertia is much bigger than the electric motor inertia, sometimes it could cause extreme overshoot or enhance settling times. Both circumstances can decrease production range throughput.
However, when the motor inertia is bigger than the strain inertia, the electric motor will need more power than is otherwise necessary for this application. This improves costs because it requires spending more for a engine that’s bigger than necessary, and since the increased power consumption requires higher operating costs. The solution is to use a gearhead to servo gearbox complement the inertia of the electric motor to the inertia of the strain.