Elevator brake and brake control circuit
AssigneeKone Corporation
InventorsAri Kattainen, Timo Syrman
Life of this patent
Estimating the term…
Abstract
A control circuit for controlling an electromechanical elevator brake is disclosed. The control circuit includes at least one brake coil (L1), a direct-voltage source (BR1), a semiconductor switch arrangement, a current measuring unit, at least two semiconductor switches, and a control unit (CO1) for controlling operation of the circuit. The current measuring unit (Lm1) produces current data that is passed to the control unit (CO1). The at least two semiconductor switches (SW1, SW2) are controlled by the control unit (CO1) such that operation is alternated between the two so that the working condition of each switch can be checked in its turn on the basis of feedback data obtained from the current measuring unit.
Claims12
A control circuit for controlling an electromechanical elevator brake, said control circuit comprising:
- at least one brake coil;
- a direct-voltage source;
- a semiconductor switch arrangement including at least two semiconductor switches;
- a control unit;
- and
- a current measuring unit that produces current data passed to the control unit;
- wherein the control unit alternately operates the at least two semiconductor switches such that the working condition of each switch can be checked in its turn on the basis of feedback data obtained from the current measuring unit.
An electromechanical elevator brake, comprising:
- at least one brake coils;
- a pressure element;
- a brake pad pressed towards a braking surface by the pressure element, said brake pad being movable by the action of the force effects of a magnetic field set up by a current flowing in the brake coil;
- and
- a brake control circuit that controls the current supplied to the brake coil, the brake control circuit including
- at least one brake coil;
- a direct-voltage source;
- a semiconductor switch arrangement including at least two semiconductor switches;
- a control unit;
- and
- a current measuring unit that produces current data passed to the control unit;
- wherein the control unit alternately operates the at least two semiconductor switches, such that the working condition of each switch can be checked in its turn on the basis of feedback data obtained from the current measuring unit.
Dependencies are inferred from the claim text.