Patent ID: 11869713
Assignee: CHR.MAYR GMBH + CO. KG
Field: Mechanical elements (Mechanical engineering)
Classification: CPC H  B  F | IPC B  F  H

Claim 0:
1. A method for preventive function control of at least one electromagnetic spring-loaded brake, which at least:
comprises a coil, as well as
an armature disk;
a coil carrier with compression springs distributed thereon;
a control module; and
a monitoring module with at least:
a semiconductor component,
a current measuring device, and
a voltage measuring device;
wherein the method includes:
(i) controlling the spring-loaded brake with a voltage by the control module;
(ii) measuring state variables current (I) and voltage (U) at the electromagnetic spring-loaded brake by the monitoring module;
(iii) determining a parameter (T; F) during the control of the electromagnetic spring-loaded brake by the control module;
(iv) integrating the parameter (T; F) over a first range of the parameter (T; F) which extends from a starting point of the control to a point (W) at which the armature disk begins to move;
(v) detecting a current value at the point (W) at which the armature disk begins to move;
(vi) integrating the parameter (T; F) over a second range of the parameter (T; F) which extends from the starting point of the control when the current (I) again reaches the current value at the point (W) to a point at which a constant current is achieved;
(vii) calculating a ratio (X) from the integral of the parameter (T; F) over the first range to the integral of the parameter over the first and second ranges; and
(viii) outputting a status signal upon a value of the ratio (X) reaching or exceeding a predetermined value (Y).