Magnetic powder brake is widely used in paper making, printing, plastics, rubber, textile, printing and dyeing, wire and cable, metallurgy and other related coiling processing industry. In addition, the magnetic powder clutch can also be used for buffer starting, overload protection, speed regulation and so on. Magnetic powder brake is also often used to drive mechanical load and brake and so on. (1) high precision torque control, the torque control range is very wide, and the control precision is high, the transmission torque and exciting current into the correct proportion, can achieve high precision control. (2) superior durability, long life, using heat-resistant, wear-resistant, oxidation-resistant, corrosion-resistant super-alloy magnetic powder, long life. (3) the stability is superior to the fixed torque characteristic, the magnetic gas characteristic of the magnetic powder is good, and the binding force between the powder particles is stable, the sliding torque is very stable, and the constant torque can be maintained for a long time regardless of the relative number of rotations. (4) continuous sliding operation, excellent heat dissipation and uniform thermal deformation of the cooling structure, coupled with the high heat resistance of magnetic powder, allowing connection and braking power and sliding power, can smooth sliding operation, no, cause Vibrations. (5) the connection is smooth, without impact, the impact of the connection is minimal, and can start and stop smoothly without impact. And the resistance torque is very small, will not cause useless heat. (6) suitable for high frequency operation, quick response and special heat dissipation structure, suitable for high frequency operation. (7) lightweight, maintenance-free, long life, compact and lightweight type, using high-temperature coil and special grease bearing, and wear-resistant armature for wear-prone special treatment to extend service life.