BRAKING DEVICE

摘要

A braking system for controlling the speed of a moving member is disclosed. The braking system includes both a dynamic and a mechanical brake whose operation is controlled by a central control circuit. The dynamic brake has a maximum dynamic braking moment which it can apply to the moving member which is defined by a limiting characteristic curve. The central control circuit generates an adjustment signal as a function of the difference of the actual value of the total braking moment applied to the moving member by the dynamic and mechanical brakes and the desired value of the total braking moment. The central control circuit utilizes the adjustment signal in such a manner that the dynamic braking moment applied to the moving member by the dynamic brake is increased or decreased when the actual value of the dynamic braking moment applied to the moving member is less than the maximum value permitted by the limiting characteristic curve and such that the mechanical braking moment applied to the moving member by the mechanical brake is increased or decreased only after the actual value of the total braking moment applied to the moving member by the dynamic and mechanical brake is greater than the maximum dynamic braking moment defined by the limiting characteristic curve.