Tips for Picking the Best Variable Frequency Drive
A variable frequency drive or a variable speed drive is essential in providing much-needed power drop as well as suitable operation. That said, you ought to purchase the perfect variable speed drive to ensure that you get value for your investment. Finding the right variable speed drive for your application will require you to factor numerous key consideration. For instance, based on acceleration needs, you may do better with sensorless vector control than volts-per-hertz (V/f) control. V/f control would work better for pulling logs up a grade, however, it may be work for dockside elevators that put 12-ton shipment containers to within inches In the piece are essential factors that you want to keep in mind to assist you in getting the ideal variable frequency drive.
A good place to commence when searching for a good variable frequency drive is by factoring the load type. For a constant-torque load, the torque is liberated of the speed; not factoring momentary shock loads. Examples of such loads are conveyor and hoists. When it is a question of a variable-torque load, the torque will vary as speed function. This types of loads will include fans and pumps. The primary difference will affect each decision you will make about the sort of Kansas City variable speed drive.
Acceleration requirements will also be a factor to look at when shopping for a variable frequency drive. Figure out whether how fast the load accelerates to gain speed will matter. That will not be essential for a fan, but certainly significant for a centrifuge. For centrifuges, it is best to go for sensorless vector control, and not a V/f control. The V/f approach is workable for a lot of applications, but unlike sensorless vector control, it will allow a motor to progress to near-maximum torque at low speeds. Although V/f control can be fit if you are dragging logs up a slant, they will not work for a dockside pulley or crane that positions a 12-ton load to within inches.
Controlled deceleration is not a new thing when it comes to VFD, however, it presents its challenges. The motor will take the role a generator during decelerations. Since the consequential energy ought to be consumed or taken somewhere, it will be dissipated in the form of heat, usually in a braking resistor. Controlled-deceleration feature is a decent answer for constant-torque loads, fluctuating loads, or even uneven loads.
Last but not least, ensure you consider your speed range when looking for a variable speed drive. While a conveyor belt may function dependably at 60 Hz, for an unspooling unit on a production line, the motor should produce torque as proficiently at 0.5 Hz as 60 Hz.