LABORATORY CENTRIFUGE PROVIDED WITH SAFETY MEANS ADAPTED TO REGULATE THE SPEED OF ROTATION OF ITS MOTOR SHAFT

摘要

The present invention relates to a laboratory centrifuge comprising safety means (11) adapted to limit the speed of rotation of its drive shaft, or to ensure its rotational stop, taking into account the maximum permissible speed of the accessory which is associated. According to the invention, these security means (11) comprise: - means (12) for generating an analog signal "motor shaft", - means (13) for generating an "accessory" analog signal, - means (14). ) for comparing the voltage value of said analog signal "motor shaft" with respect to the voltage value of said "accessory" analog signal, and - regulating means (15) for limiting the rotational speed of said motor shaft, or to ensure its stop in rotation, adapted to be activated when the voltage value of said analog signal "motor shaft" exceeds the voltage value of said analog signal "accessory". Such security means (11), of the analog type, have the advantage of providing independent redundancy with respect to control means of the digital type.