Today the VFD is perhaps the most common kind of output or load for a control system. As applications are more complex the VFD has the capacity to control the swiftness of the motor, the direction the electric motor shaft is turning, the torque the electric motor provides to a load and any other motor parameter which can be sensed. These VFDs are also available in smaller sized sizes that are cost-efficient and take up less space.
The arrival of advanced microprocessors has allowed the VFD works as an exceptionally versatile device that not only controls the speed of the motor, but protects against overcurrent during ramp-up and ramp-down conditions. Newer VFDs also provide methods of braking, power enhance during ramp-up, and a number of handles during ramp-down. The largest savings that the VFD provides is usually that it can make sure that the motor doesn’t pull excessive current when it begins, so the overall demand factor for the entire factory could be controlled to keep carefully the utility bill only possible. This feature by itself can provide payback in excess of the cost of the VFD in less than one year after buy. It is important to remember that with a normal motor starter, they will draw locked-rotor amperage (LRA) when they are starting. When the locked-rotor amperage happens across many motors in a manufacturing plant, it pushes the electric demand too high which often outcomes in the plant having to pay a penalty for all the electricity consumed through the billing period. Since the penalty may become just as much as 15% to 25%, the cost savings on a $30,000/month electric costs can be used to justify the purchase VFDs for practically every electric motor in the plant actually if the application form may not require functioning at variable speed.
This usually limited the size of the motor that could be controlled by a frequency and they were not commonly used. The earliest VFDs used linear amplifiers to regulate all aspects of the VFD. Jumpers and dip switches were utilized provide ramp-up (acceleration) and ramp-down (deceleration) features by switching larger or smaller sized resistors into circuits with capacitors to make different slopes.
Variable Speed Gear Motor, the right option for you.