| 摘要 |
An electromechanical brake comprises at least one friction brake member (10), movable between an inactive rest position and an active working position, an actuator (12), connected to said brake member and provided with an electric force generating device (13), and an electric control and drive unit (17) for the force generating device (13). Said control and drive unit (17), which is provided with a supply voltage inlet (18', 18") connectable to an external supply voltage source (19), comprises an auxiliary voltage source (26) which can be charged from the external supply voltage source (19) via the supply voltage inlet (18', 18"), and monitoring means (20) for monitoring the voltage state at said inlet (18', 18") if the voltage across the supply voltage inlet (11', 18") falls below a predetermined lowest permitted value while the brake member (10) is in its rest position, said monitoring means (20) will cause a forced movement of the brake member (10) to its working position by supplying the required electric energy for this purpose to the force generating device (13) from the auxiliary voltage source (26). |
