Dynamometer brake PB Series

powderelectromagnetic

The Powder Brake Dynamometer (PB Series) contains, as its 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 friction. They are ideal for applications operating in the low to middle speed range or when operating in the middle to high torque range. Like Hysteresis Brakes, Powder Brakes provide full torque at zero speed. Like the Eddy-Current Brake Dynamometers, the PB series are water-cooled, allowing for power ratings up to 48 kW. The PB Dynamometers have accuracy ratings of ± 0.3% to 0.5% full scale (± 2% for PB 2.7), depending on size and system configuration. Additional mounting possibilities include speed pickup and OEM version IS. Features o12 Models with Maximum Torque from 600 mN•m to 1 200 N•m (84 oz•in to 885 lb•ft) oBraking Power: 150 W to 48 kW oStable Braking Torque oLow Moment of Inertia oOperation in Either Rotational Direction oBraking Torque Measurement Integrated oIntegrated Optical Speed Sensor oSpecial designs available upon request Operating Principles The PB Series – Powder Dynamometers 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 friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed. The element to be tested can be loaded at standstill to determine the starting torque.