Matched Hysteresis Brakes for Tension Control(Magnetic Brake) 

These units are developed to ensure that every brake of a given model designation will be matched at a pre-determined torque and current point to every other brake of the same model designation. By possibility of a special adjustment each brake will be matched at the selected match point to within ± 1.5% provided that the match point is above 50 % of the max possible torque. All other points of the curve then are within ± 4% deviation from each other. The use of matched hysteresis brakes is, for example, an advantage for a multi tension control system for multi spool payoff frames. 


This system assures that every brake of a given model designation will be matched - at a predetermined torque and current point - to other brakes of the same model designation, regardless of material and manufacturing tolerances. 
Applications: 

HT's innovative approach to providing the best possible tension control systems available has led to the development of the Matched Torque Hysteresis Brake. This unique ability to provide matched performance characteristics from any number of brakes of like design and rating makes it possible to control a matched group of brakes from a single sensor or in open loop. This assures that the same level of current to each matched brake will result in virtually the same torque from each matched brake. 
1. HT Matched Hysteresis Brake used in a multiple payoff system where one sensor controls tension in the system. Due to specially calibrated matched brakes, it is possible to hold each payoff tension within ± 1% at matched point value. 
2. Large Bore Hysteresis Brakes installed in a fiber optic stranding machine to control the tension of the wrapping material.