Definition of terms

The following definitions are used for brake dimensioning.

The stopping distance s_A is defined as the distance that is traveled from the moment braking is triggered (e.g. actuation of the emergency off switch) to standstill. It comprises:

• Signal travel distance
• Distance traveled during the signal propagation time t_signal. It is assumed that the drive continues to operate at its intended setpoint speed during this time.
• Coasting distance
• Distance traveled during the response time t₂ of the brake. It is assumed that the drive is no longer driven during this time, meaning that it coasts to a stop depending on external loads, friction, direction of movement, and the kinetic energy present. It is also assumed that no braking torque is yet effective during this time period.
• Braking distance s_B
• Distance traveled during the braking time t_B, measured from the moment of mechanical brake application until standstill. For modeling purposes, a constant mean braking torque is assumed; its variation is represented by the application factors f_Mmin and f_Mmax.