Flying shear allen bradley1/1/2023 ![]() ![]() In geared systems, the process can wear or break gear teeth.ĪC drives can control this phenomenon through a feature called S Curve. In belt-driven systems, belts can fly off or break. This jerking action puts considerable stress on mechanical components. While not as dramatic, it is the industrial equivalent of popping the clutch on a stick-shift car. The same is true when the transition is reversed. When a load transitions from steady-state speed to accelerating or decelerating, the transition is usually instantaneous. S Curve and controllable acceleration and deceleration are other, often-overlooked drive features that help improve process performance and reduce maintenance. ![]() These applications require more advanced machine monitoring devices that can accept data from multiple sources to alert personnel of impending faults and failures. Multi-motor applications - those using one AC drive and more than one motor - will require the motor overload to be disabled since the drive would be unable to distinguish each individual motor’s current to provide protection for individual motors. This may also be done with thermister feedback directly from devices buried in the motor windings, using actual temperature readings to determine motor stress. ![]() Motor overload software uses an algorithm incorporating motor current, speed, and time as inputs to model the temperature of the motor. When a motor is in a state of severe exertion, beyond its safe operating limits, the motor overload feature can reduce the output current or shut off the motor and protect it from thermal damage or catastrophic failure. Almost all drives today have a built-in electronic motor thermal overload feature. In more extreme situations, the drive itself will act to protect the motor. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |