Judge the performance of magnetic powder brake
The magnetic powder brake is mainly composed of a driving rotor, a driven rotor, and a fixed support. The magnetic powder brake is provided with an excitation coil, a soft magnetic material and an air gap surrounding the coil to form a magnetic circuit. The magnetic powder brake is filled with some soft between the active rotor and the driven rotor. Magnetic powder, because the active part of the magnetic powder brake is high-speed operation, will generate a lot of heat, so the magnetic powder inside the magnetic powder brake needs better heat resistance and wear resistance.
When the excitation current of the magnetic powder brake is turned off, the magnetic powder quickly returns to the non-excitation state, and the control of the brake is decisive. The key to determining the quality of the magnetic powder brake is the performance of the magnetic powder. When the coil is not energized and the cylinder rotates, due to the centrifugal force The magnetic powder is pressed against the inner wall of the cylinder, a gap is created between the magnetic powder and the rotor, and the clutch does not generate idling torque, so it generates almost no heat. The higher the magnetic permeability of the magnetic powder and the less the remanence, the control characteristics of the magnetic powder brake The better.
When the magnetic powder brake coil is energized, the current establishes a magnetic field in the magnetic circuit, and the magnetic powder between the magnetic powder brake master and follower is connected into a chain. At this time, due to friction between the components, torque can be transmitted and excited. The larger the current, the greater the magnetic induction intensity in the working gap of the magnetic powder brake, the greater the electromagnetic attraction force, and the larger the torque transmitted by the magnetic powder brake. On the contrary, the torque transmitted by the magnetic powder brake becomes smaller. Adjust the amount of transmitted torque.