Electro-mechanical brake actuator with internal power electronics unit and energy store

Abstract

The invention relates to a brake actuator (1) for a rail vehicle, comprising a housing (11); a pressing part (8) which is configured so as to be pressed onto a brake disc (9); means (5, 6) for movingthe pressing part (8); a logic unit (2) in or on the housing (11), said logic unit being configured to control the means (5, 6) for moving the pressing part (8); a control connection (3) on the housing (11); a supply connection (4) on the housing (11) for supplying the brake actuator (1) with energy; and a power electronics unit (99) with an energy store, said power electronics unit being arrangedin or on the housing (11) and being paired solely with the one brake actuator (1).

Description

technical field [0001] The invention relates to an electromechanical brake actuator according to the preamble of claim 1 . Background technique [0002] DE 10 2009 042 965 A1 discloses an electromechanical brake actuator according to the preamble of claim 1, comprising: a housing; a pressing element configured to be pressed onto a brake disc; for means for moving the pressing member configured to move the pressing member towards and away from the brake disc; a logic unit in the housing configured to control the pressing member for moving the pressing member Moving components; a control interface on the housing for connection to a higher-level controller of the rail vehicle located outside the housing; a supply interface on the housing for supplying energy to the brake actuator; A pressure detection unit in the housing for detecting the actual pressure force of the pressure element on the brake disc. Such electromechanical devices (EM) are in principle considered as an alte...

AI Technical Summary

Problems solved by technology

The inventors of the present invention have found that this is disadvantageous in the context of functional safety and system availability

A failure of the external energy store or the central supply line before branching off to the actuator results in a failure of the braking action (“dangerous failure”) in the active actuator and in a forced actuation (“safe state”) in the passive system , but the availability of rail vehicles is generally no longer ensured by this

[0004] Furthermore, a line failure in the supply line to the actuator or to the supply interface leads to failure of the actuator with the same disadvantages described above

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