Method and arrangement for the sensorless operation of...

F - Mech Eng,Light,Heat,Weapons – 16 – C

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F16C 39/06 (2006.01) G01B 7/14 (2006.01) G01D 5/14 (2006.01) G05D 3/12 (2006.01)

Patent

CA 2720270

The invention relates to a sensor system for a magnetic bearing, comprising two actuator coils (1, 2), two clocked power output stages (4, 5), a current sensor (3) for detecting those currents in the actuator coils (1, 2) which are encumbered with a ripple current, and a sensor interface (6), wherein the clocked power output stages (3, 4) provide a pulse-width-modulated out-put voltage, the pulse width of which is narrowed or widened by small amounts in each case in a predefined order, and wherein the pulse widths of the clocked power output stages (3, 4) are modulated in a fixed phase relationship with respect to one another. The sensor system mentioned achieves the object of specifying a sensor system for a magnetic bearing with a clocked power out-put stage. The invention also relates to a magnetic bearing, to a control device for a magnetic bearing and to a method for detecting the position in a magnetic bearing.

L'invention concerne un système de capteurs pour un palier magnétique, comprenant deux bobines d'activation (1, 2), deux seuils de puissance synchronisés (4, 5), un capteur de courant (3) pour la détermination des courants soumis à un courant ondulé dans les bobines d'activation (1, 2) et une interface de capteurs (6). Les seuils de puissance synchronisés (3, 4) réparent une tension de sortie modulée en amplitude d'impulsions dont l'amplitude d'impulsions est raccourcie ou rallongée respectivement de petites valeurs dans une succession donnée et la modulation des amplitudes d'impulsions des seuils de puissance synchronisés (3, 4) se produit dans une relation de phase fixée. Ledit système de capteurs permet d'obtenir un système de capteurs pour un palier magnétique avec un seuil de puissance synchronisé. L'invention concerne en outre un palier magnétique, un module de réglage pour un palier magnétique et un procédé de détection de position dans un palier magnétique.

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