electromagnetic brake, the coefficient of attenuation is equal to Thus, to obtain a given one can change the parameters of the transmission and the brake itself, and others (see (6.4)). To evaluate the dynamic properties it is expedient to use the time constant of the damper where is the mass of its moving parts. If one considers only the mass of the rotor applied to forward motion, which is defined by the formula , the time constant of the damper, not considering loss in transmission, is equal to the electromechanical time constant of the brake where the moment of inertia of the rotor 7 is the density of the rotor material; kP is a coefficient which considers the effect of the projections and additional parts (usually kp = 1.3-1.7). Then, finally where ais in ; is in tesla, in kg/m3. Formula (6.7) shows that does not depend on the size of the brake and the transmission ratio, but is defined only by the magnetic inductance in the gap and the material of the rotor. The best rotor material, which gives a minimum time
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