Figure 6.8. Characteristics of two electromagnetic brakes with different rotor thicknesses, a. M 10, N cm; b. at 20*C; c. 0Jp103, rev/min. the chosen limitation on the velocity of the electromagnetic brake with in increase in the thickness of the rotor there is a large maximum power. Further increase of , however, may be inappropriate, since the magnetic inductance decreases as the air gap increases. 6.4.3. Heating of the Brake Rotor When kinetic energy is absorbed on impact, the rotor of the brake is heated. The temperature of heating can be easily calculated if one does not consider heat exchange. This may be done because the time of operation of the brake is small; moreover, in real conditions the brake is in vacuum; as a result where is the mass of the rotor; is the specific heat capacity. Calculations show that even during docking with maximum velocities, the heating of the brake rotor is rather small. Thus, in the docking of the Soyuz-Salyut docking devices with a velocity of the two electromagnetic brakes of the longitudinal shock absorber, the masses of the rotors of which are kg, absorb J, and their rotors are heated by 40*C. The acceptable heating
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