Linearity Of Magnetic Powder Brake And Magnetic Powder Clutch

The magnetic powder brakes are used for winding, unwinding, starting, braking, tension control, load, etc. These applications are all done by the torque of the magnetic powder brake and the magnetic powder clutch. The magnetic powder brake can be normally started or not. Torque-related, the magnetic powder brake is the torque generated when the object is subjected to a tangential force with the direction of rotation of the object, called the torque.

As an ideal automatic transmission component, magnetic powder brake and magnetic powder clutch are the first choice in the field of industrial machinery. Magnetic powder brake and magnetic powder clutch have good linearity. Torque and excitation current are proportional to a wide range, and can be used as linear adjustment component. The magnetic powder brake and the magnetic powder clutch stop use the smoothing characteristic and the constant torque characteristic at the time of connection to achieve buffer start and stop.

Analysis of the role of magnetic powder brake with excitation coil

The magnetic powder brake is provided with the analysis of the action of the exciting coil, and the soft magnetic material and the coil around the air gap constitute a magnetic circuit. The magnetic powder brake is mainly composed of an active rotor, a driven rotor and a fixed support. Some soft magnetic magnetic powder is filled between the active rotor and the driven rotor.

When the excitation current is turned off, the magnetic powder quickly returns to the non-excited state, and the control of the brake is released. The key to determining the quality of the magnetic powder brake is the performance of the magnetic powder. The higher the magnetic permeability of the magnetic powder and the less the residual magnetism, the better the control characteristics of the magnetic powder brake. When the coil of the magnetic powder brake is not energized and the cylinder rotates, the magnetic powder is pressed against the inner wall of the cylinder due to the centrifugal force, and a gap is generated between the magnetic powder and the rotor, and the magnetic powder clutch does not generate idling torque, and thus generates almost no heat.

When the coil is energized, the current establishes a magnetic field, a magnetic powder clutch, and a magnetic powder brake in the magnetic circuit. The magnetic powder between the active member and the driven member is connected in a chain shape, and torque can be transmitted due to friction between the members. The larger the excitation current is, the greater the magnetic induction intensity in the working gap is, the electromagnetic attraction is increased, and the transmitted torque becomes larger; on the contrary, the transmitted torque becomes smaller. By adjusting the magnitude of the excitation current, the magnitude of the transmitted torque can be adjusted.

Since the active part of the magnetic powder brake is operated at a high speed, a large amount of heat is generated, and thus the magnetic powder requires better heat resistance and wear resistance.

 Durability and heat capacity of magnetic powder brakes

The durability and heat capacity of the magnetic powder brake, and the proper loading of the magnetic powder brake have a great influence on the durability. This type of brake can also be used under continuous slip. The heat generated by the slip causes the magnetic powder brake  to rise in temperature and affect its working ability. Normally, the surface temperature of the magnetic powder brake is controlled to be below 100 degrees Celsius. When the magnetic powder brake capacity is found to be downloaded, the magnetic powder should be replaced.

Magnetic powder is a kind of consumable. Magnetic powder is an essential material for magnetic powder brakes. Torque transmission is mainly performed by magnetic powder. The service life of magnetic powder is affected by factors such as quality, load, working time, and temperature. If the time of use of magnetic powder is not as expected, there is definitely a reason.