Patent attributes
A brake system for an elevator system includes a first brake circuit, a second brake circuit and a control unit, the first and second brake circuits each having a brake, and each brake including an actuator and a main spring unit, the actuator being preloaded by the main spring unit in the closing direction of the brake with the force required for applying the braking force. The actuator is activated by a control signal of the control unit to compensate the force of the main spring unit, and thus release the brake. The control unit, upon activation, selects only one of the two control signals between the activation of the first and second brake circuits, such that the ratio of the number of activations of the first brake circuit and the number of activations of the second brake circuit aims for a fixed ratio.
