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The Torque Powder Brakes (TPBSeries) are ideal for applications operating in the low speed range or middle to-high torque range. These magnetic powder brakes provide full torque at zero speed and are convection or air cooled, allowing power ratings up to 900W (2100W with air cooling).
APPLICATIONS
These units are suited for tension control applications, such as wire winding, foil, film, and tape tension control. Mounted on test benches, TPB Series - Torque Powder Brakes allow performance and reliability testing on driving elements such as electric motors, hand-held power tools, geared motors, reduction gears, and hydraulic transmission systems. Other applications include load simulation for life testing on electric motors, actuators, gearboxes, power steering, and many other rotating devices and assemblies.
OPERATING PRINCIPLES
The TPB Series Torque Powder Brakes contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through magnetic coupling between the rotor and stator. Magnetic powder brakes produce their rated torque from zero speed. The element to be tested can be loaded from zero speed to determine the starting torque. Without electrical excitation, the shaft rotates freely. Since the magnetic powder is always contained within the brake, all powder brakes have a minimum drag torque associated with them. With electrical excitation, the shaft becomes magnetically coupled. While the torque is less than the brake output torque, the shaft will not rotate. When the torque is increased, the brake will slip at the torque level set by the input current.
Available torque ratings: 6, 12, 25, 50, 100, 200, 400, 600 N·mBraking power up to 900 W (2 100 W with air cooling)Rated torque available from 0 rpmStable braking torqueLow moment of inertiaLow residual torqueOperation in both rotational directionsDelivered with foot mountFor horizontal use only
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