Since energy increases as the air gap decreases due to an increase in the maximum momentum also increases; however, it is attained in this case at large rotation velocities. Consequently, to increase the maximum power absorbed by the brake, one should decrease the thickness of the rotor and increase its rate of rotation. However, in this case the slope of the momentum of the characteristic of the brake decreases. There is a specific gap between the magnets and the rotor which provides for free rotation of the later and which should be considered in calculations of the brake characteristic. The critical velocity may be defined using (6.3): Analysis of (6.6) shows that since the average length of the magnetic strength line is proportional to the diameter of the rotor , the critical velocity in the final analysis is inversely proportional to this diameter. Thus, the maximum power of the brake, which is equal to is proportional to its length and the diameter of the rotor in the first degree. At the same time the volume and mass of the rake are proportional to the square of its diameter, and the moment of inertia is proportional to the cube of the diameter of the full rotor. Thus, to increase the specific power and improve the dynamic characteristics it is more suitable to increase the length of the brake than its diameter. These correlations, although they do not consider all the dependences between the characteristics and the parameters of the electromagnetic brake, detecting only basic trends, make it easier to make a valid choice of brake and damper parameters as a whole. 6.4.2. Parameters of the Dampers with the Electromagnetic Brake In planning it is necessary to obtain the given coefficient of attenuation at a minimum mass, volume, and inertia of moving parts; is defined by the momentum characteristic of the brake and the transmission ratio of the reducer For a linear shock absorber with screw transmission (pitch of screw is ) at small velocities, that is, in the initial part of the characteristic of the
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